US20020037780A1 - Hockey stick with reinforced shaft - Google Patents
Hockey stick with reinforced shaft Download PDFInfo
- Publication number
- US20020037780A1 US20020037780A1 US09/898,301 US89830101A US2002037780A1 US 20020037780 A1 US20020037780 A1 US 20020037780A1 US 89830101 A US89830101 A US 89830101A US 2002037780 A1 US2002037780 A1 US 2002037780A1
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- Prior art keywords
- shaft
- outer portion
- core portion
- composite
- hockey stick
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B59/00—Bats, rackets, or the like, not covered by groups A63B49/00 - A63B57/00
- A63B59/70—Bats, rackets, or the like, not covered by groups A63B49/00 - A63B57/00 with bent or angled lower parts for hitting a ball on the ground, on an ice-covered surface, or in the air, e.g. for hockey or hurling
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B60/00—Details or accessories of golf clubs, bats, rackets or the like
- A63B60/06—Handles
- A63B60/08—Handles characterised by the material
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B2102/00—Application of clubs, bats, rackets or the like to the sporting activity ; particular sports involving the use of balls and clubs, bats, rackets, or the like
- A63B2102/24—Ice hockey
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B2209/00—Characteristics of used materials
- A63B2209/02—Characteristics of used materials with reinforcing fibres, e.g. carbon, polyamide fibres
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B60/00—Details or accessories of golf clubs, bats, rackets or the like
Definitions
- the present invention relates generally to hockey sticks and more particularly to a graphite and wood construction for the shaft thereof that exhibits an improved stiffness to weight ratio and a method of making the same.
- Hockey is one sport in which the equipment has continued to develop. Although the functional requirements of a hockey stick have not changed, the design and manufacturing methods have progressed and evolved with a wide variety of materials now being used in the industry.
- a hockey stick shaft must be lightweight and have a strength sufficient to endure the stresses that arise in use. More particularly, it must be able to withstand the impacts that occur throughout the shaft due to stick to stick contact during play.
- the materials used in the construction of the shaft and its overall stiffness define the all important “feel” of the shaft.
- the shaft must be stiff, but provide sufficient flex and damping during wrist and slap shots for the player to maximize velocity, control and feedback from the shot.
- Hockey stick shafts can be made from a variety of materials including wood, aluminum, plastic and composite materials such as fiberglass, graphite and Kevlar. Materials are usually selected for their physical properties and cost in an attempt to improve performance while maintaining an affordable price for the shaft.
- Composite shafts are generally more expensive and can have a lower durability, but are still popular because of their lightweight and superior stiffness. Wood shafts are relatively inexpensive and have good “feel”, but they are not especially light, stiff or durable.
- Aluminum shafts can have a relatively short life as they are prone to bending failure. Although wood shafts are available with graphite or fiberglass laminated outer layers that provide increased stiffness, they are heavier and more expensive than all wood shafts and still do not have the stiffness of composite shafts.
- One object of the present invention is to provide a shaft and a method of making the same which has a reinforcing core and exhibits an improved stiffness to weight ratio.
- Another object of the present invention is to provide a shaft and method for making the same that exhibits increased durability while minimizing weight.
- Another object of the present invention is to provide a shaft with an internal composite core at a cost substantially less than an all composite shaft. It is unique to the present invention that the composite core is stiffer and/or lighter than the material removed from the shaft to create the bore or channel to accept the core.
- one embodiment of the present invention provides a hockey stick and method of making the same that includes a shaft.
- a composite member is provided within the interior of the shaft.
- the remainder of the shaft is preferably made of wood.
- the wooden portion is provided with one or more bores or channels which provide a volume within the interior of the shaft to receive the composite member.
- the composite member is preferably made of a fiber/resin composite such as graphite.
- Various designs or types of composite core configurations may be applied throughout the interior of the shaft. The presence of the composite core provides a stiffness to weight ratio not realizable in an all wood shaft or a shaft of wood with outer composite laminates, but retains the desirable “feel” of a wood shaft.
- the present invention is directed to the manufacturing process and performance of a shaft for a hockey stick, similar techniques and manufacturing methods can be applied to various other sports equipment that includes shaft like embodiments such as lacrosse sticks, baseball bats, field hockey sticks and tennis rackets among others.
- FIG. 1 is a perspective view of a first preferred embodiment of a hockey stick of the present invention showing the shaft in two pieces merely for the purposes of illustration and explanation;
- FIG. 1 a is a cross-sectional end view of the hockey stick of FIG. 1;
- FIG. 2 is a cross-sectional side view of the hockey stick, taken along sectional line 2 - 2 of FIG. 1;
- FIG. 3 is a cross-sectional view of the shaft, taken along sectional line 3 - 3 of FIG. 1;
- FIG. 3 a is a cross-sectional end view of the shaft of a second alternative preferred embodiment of the hockey stick of the present invention.
- FIG. 4 is a cross-sectional end view of the shaft of a third alternative preferred embodiment of the hockey stick of the present invention.
- FIG. 5 is a cross-sectional end view of the shaft of a fourth alternative preferred embodiment of the hockey stick of the present invention.
- FIG. 6 is a cross-sectional end view of the shaft of a fifth alternative preferred embodiment of the hockey stick of the present invention.
- FIG. 7 is a cross-sectional end view of the shaft of a sixth alternative preferred embodiment of the hockey stick of the present invention.
- FIG. 8 is a cross-sectional side view of the shaft of FIG. 7, taken along sectional line 8 - 8 in FIG. 7;
- FIG. 9 is a cross-sectional view of the shaft of a seventh alternative preferred embodiment of the hockey stick of the present invention.
- FIG. 10 is an exploded end view showing the components of the shaft shown in FIG. 9;
- FIG. 11 is a cross-sectional view of the shaft of eighth alternative preferred embodiment of the hockey stick of the present invention.
- FIG. 12 is an exploded end view showing the components of the shaft shown in FIG. 11;
- FIG. 13 is a perspective view of a wood panel substrate used in the manufacturing process of the present invention.
- FIG. 14 is a perspective view of the wood panel substrate of FIG. 14 having composite inner portions provided.
- FIG. 15 is a perspective view of the manufacturing process of the present invention.
- a hockey stick 10 having a shaft 12 and a blade 14 .
- the shaft 12 of the hockey stick 10 has a first end 16 opposite a second end 18 .
- the first end 16 of the shaft 12 is defined where the shaft 12 is coupled with the blade 14 of the hockey stick 10 (the shaft/blade interface).
- the second end 18 of the shaft 12 is defined opposite the shaft/blade interface 16 wherein the player grips the hockey shaft 12 .
- the shaft 12 of the hockey stick 10 has a cross-sectional rectangular geometry, as in traditional hockey sticks.
- cross-sectional shapes can vary in geometrical configuration depending on the preferred performance and manufacture of the hockey stick.
- the hockey stick 10 includes an outer portion 20 and an inner portion 22 .
- the outer portion 20 preferably consists of wood while the inner portion 22 preferably consists of a composite.
- a channel or bore 20 a is provided through the body of the shaft 12 .
- the inner portion 22 of the shaft 12 is provided within the channel/bore 20 a and is surrounded by the outer portion 20 of the shaft.
- the outer portion 20 of the shaft 12 is preferably made of aspen, although various types of wood or wood laminates having similar characteristics can be used. As will be apparent from the following description, there are numerous benefits to combining a wooden outer portion 20 with a composite inner portion 22 . The benefits include reducing the weight of the stick, maintaining the desirable “feel” of a wood stick, and increasing the stiffness of the shaft 12 .
- FIG. 2 a longitudinal cross-sectional view of the interior construction of the shaft 12 is shown. As can been seen, the inner portion 22 of the shaft 12 is disposed within the outer portion 20 . The size and shape of the inner portion 22 reflects the dimensions provided by the channel/bore 20 a.
- the inner portion 22 extends along the length of the shaft 12 , thereby providing increased stiffness throughout various key points along the shaft 12 , most importantly where maximum stresses develop. As seen in FIG. 2, the inner portion 22 extends throughout substantially the entire length of the shaft 12 . It should be appreciated that the length of the inner portion 22 can vary, as well as be selectively distributed anywhere along the longitudinal axis CL of the shaft 12 .
- the inner portion 22 is preferably made of a carbon fiber/epoxy resin composite.
- the carbon fiber/epoxy resin composite is also known in the art as a “graphite composite”. Although graphite composite is the most preferable material for the inner portion 22 , various other fibers such as glass or kevlar can be used in alternate embodiments of the present invention. Further, a metal core may also be used.
- the carbon fiber/epoxy resin contains a plurality of fibers.
- the thickness and orientation of the fibers in the composite affect the degree of stiffness that the inner portion 22 exhibits.
- the fibers are preferably oriented parallel to the longitudinal center axis of the hockey stick shaft 12 , indicated by line CL.
- the fibers of the composite can be oriented in a variety of directions to adjust the stiffness characteristics of the inner portion 22 . Such degrees of change include but are not limited to, a rotation of the fibers ⁇ 45 degrees relative to the longitudinal center axis CL.
- the positioning of the inner portion 22 within the shaft 12 provides varying degrees of stiffness depending on the quantity used and location of the inner portion 22 relative to the remainder of the shaft 12 .
- the degree of stiffness further depends on the cross-sectional area and geometric configuration of the inner portion 22 , as well as the length and distribution of the inner portion 22 throughout the shaft 12 . Accordingly, various embodiments of the present invention provide a variety of stiffness characteristics to a hockey stick shaft 12 depending on the desired performance of the stick during play.
- FIGS. 3 through 12 alternate cross-sectional views are shown of the composite shaft.
- Each figure represents an alternate embodiment or exploded view of an inner portion provided within an outer portion of a shaft.
- the manufacturing technique is basically the same for each embodiment, slight variations are made in the process to obtain alternate types of inner portion configurations.
- like reference numerals are used to indicate like components but increased by 100 for clarity.
- FIG. 3 illustrates an elevational cross-sectional view of a shaft 112 having a solid inner portion 122 disposed along the longitudinal center axis of the shaft 112 .
- the solid inner portion 122 is preferably made of a graphite composite and is surrounded by a solid wooden outer portion 120 .
- the solid composite inner portion 122 has a cross sectional shape that is substantially elliptical wherein the major axis is preferably aligned along the axis D-D.
- the solid inner portion 122 is placed within the shaft 112 following the removal of the corresponding wood portion of the shaft 112 .
- FIG. 3 a shows a hollow elliptical shaped inner portion 222 disposed within the shaft 212 of the hockey stick.
- This particular alternate embodiment provides the maximum stiffness-to-weight ratio while maintaining a desirable low weight shaft 212 .
- the hollow elliptical inner portion 222 is most preferably made of a graphite composite. Alternate types of hollow shaped inner portions can be can be disposed within the wood outer portion 220 of a hockey stick, including the use of various types of metal tubing.
- the hollow elliptical configuration 222 of the inner portion 222 provides an increase in stiffness desirable for a composite hockey stick, while eliminating the added weight typically provided by a solid insert.
- FIGS. 3 and 3 a provide substantially elliptical shaped inner portions 122 and 222 , respectively, alternate shaped inner portions can be used in order to obtain the desirable performance characteristics of the hockey stick.
- a circular shaped inner portion can also be used.
- FIGS. 4 through 7 illustrate alternate embodiments of a wood hockey shaft having an inner portion consisting of a different material.
- the inner portion can include a plurality of core elements, all of which are disposed along the longitudinal axis of the shaft.
- Each of the additional core elements provide unique stiffness characteristics to the wooden shaft of the hockey stick.
- FIG. 4 provides a solid rectangular shaped composite inner portion 322 disposed along the longitudinal center axis of the shaft 312 .
- the substantially rectangular inner portion 322 provides increased stiffness towards the corners of the shaft 312 .
- the solid rectangular inner portion 322 is provided within a wooden outer portion 320 .
- the cross sectional shape can be selected from a variety of geometries, including, but not limited to a circle, a square or a rectangle.
- FIG. 5 provides a cross-sectional view of a shaft 412 having an inner portion 422 comprised of five core elements 424 a - 424 e .
- Each of the five core elements 424 a , 424 b , 424 c , 424 d , and 424 e are made of select composites, metal rods or tubing, or combinations thereof.
- the core elements 424 a - 424 e are made of graphite composite.
- the plurality of core elements can be selected from a variety of shapes and sizes such that each core element can have a pre-selected cross section thereby providing a specified degree of stiffness to the shaft.
- the combination of the core elements provides an inner portion that exhibits an increased stiffness to the shaft of the hockey stick without adding unnecessary weight.
- the shaft is provided with a primary core element 424 a , and four secondary core elements 424 b , 424 c , 424 d , and 424 e .
- the primary core element 424 a is a hollow elliptical shaped core element, as previously suggested in FIG. 3 a .
- the four secondary core elements 424 b - 424 e are substantially the same shape and size as each other, although various modifications can be made to the configuration of each of the core elements 424 b - 424 e . It is preferable that the cross-section of the secondary cores 424 b - 424 e are substantially circular such that rod or tube-like elements are provided, however it should be appreciated that the cross sections can be of any shape.
- the secondary core elements 424 b - 424 e are provided towards the periphery of the shaft 412 , more particularly towards the outer four corners 413 a - 413 d of the substantially rectangular shaped shaft 412 .
- the primary core element 424 a is disposed along the longitudinal center axis of the shaft 412 .
- the primary core element 424 a of the inner portion 422 is shown as a hollow elliptical shaped element, various configurations can be applied.
- FIG. 6 demonstrates an inner portion 522 comprised of a plurality of substantially equal size core elements 524 surrounded by an outer wooden portion 520 .
- the equal sized core elements 524 are disposed uniformly throughout the shaft 512 of the hockey stick. More particularly, FIG. 6 illustrates an embodiment of a shaft 512 having six core elements 524 a - 524 f .
- the core elements 524 a - 524 f are preferably made of a graphite composite, although various types of materials can be used as previously suggested.
- the plurality of core elements 524 a - 524 f are distributed throughout the shaft 512 to support the stress that develops in the hockey stick.
- the core elements 524 a - 524 f preferably consist of carbon-based rods. Various lengths of rods may be used during manufacture to obtain the desired stiffness-to-weight ratio.
- FIG. 7 illustrates a sixth alternate embodiment wherein the cross section of the shaft 612 provides an inner portion 622 having a substantially I-shaped configuration surrounded by an outer wooden portion 620 .
- the I-shaped inner portion 622 is oriented with its major axis aligned with the major axis of the shaft 612 .
- Various orientations of the I-shaped configuration 622 can be applied within the shaft 612 , such as the I-shaped inner element 622 can be oriented orthogonal to the major axis of the shaft 612 .
- Various orientations provide varying degrees of stiffness to the shaft 612 .
- FIG. 8 is a cross-sectional view of FIG. 7 taken along line 8 - 8 .
- a plurality of bores or holes 625 a - c can be formed in the center region of the I-shaped inner portion 622 .
- the series of holes 625 a - c are preferably left hollow to minimize the overall weight of the hockey stick. Although these holes are preferably left hollow, various types of composite could be added to provide additional stiffness to the shaft.
- FIGS. 9 and 10 provide a seventh alternate embodiment of a shaft 712 having an outer wooden portion 720 and an inner composite portion 722 .
- the outer wooden portion 720 is divided into a first section 720 a and a second section 720 b .
- the two sections 720 a and 720 b are joined at seam 723 provided along the minor axis of the shaft 712 by an adhesive.
- the inner portion 722 is shown as a substantially elliptical hollow composite, although various alternate types of inner portions are applicable.
- the two sections 720 a and 720 b of the outer portion 720 have protective side portions 725 a and 725 b on either side of the shaft 712 .
- the protective side portions 725 a and 725 b may be comprised of wood, laminate, or alternate protective materials and can increase the stiffness of the shaft.
- FIG. 10 The exploded view, as shown in FIG. 10, illustrates the combination of the components that make up the shaft.
- FIGS. 11 and 12 provide an eighth alternate embodiment and an exploded view of a shaft 812 having an outer wooden portion 820 and an inner composite portion 822 .
- the outer wooden portion 820 is divided into a first section 820 a and a second section 820 b .
- the two sections 820 a and 820 b are joined at seam 823 provided along the major axis of the shaft 812 by an adhesive.
- the inner portion 822 is shown as a substantially elliptical hollow composite, although various alternate types of inner portions are applicable.
- protective side portions are not provided. This particular feature may be optionally applied based on the specific needs and manufacturing of the shaft.
- FIGS. 13 through 15 demonstrate the various stages in the manufacturing process.
- the length of the first wood piece 1000 a used is substantially the same as the desired length of the shaft, whereas the width is sufficient enough to yield approximately six shafts.
- the wood used in the manufacturing method is preferably aspen.
- the manufacturing method involves machining a plurality of grooves or channels 1021 a within a first piece of wood 1000 a thereby providing the first section 1020 a of the outer portion 1020 of the shaft 1012 .
- a router is typically used to obtain the plurality of channels, although alternate techniques may be applied.
- various shaped grooves or channels 1021 a may be provided, according to each of the alternate embodiments previously described, the most preferable are semi-elliptical shaped grooves 1021 a.
- a plurality of composite inner portions 1022 are placed within the semi-elliptical channels 1021 a provided by the first piece of wood 1000 a.
- a second piece of wood 1000 b as shown in FIG. 15, is provided having complimentary semi-elliptical shaped channels or grooves 1021 b and positioned relative to the first piece of wood 1000 a having the channels 1021 a that contain the composite inner portions 1022 .
- the second piece of wood 1000 b provides the second section 1020 b of the outer portion 1020 .
- a degreasing or cleaning solvent can be optionally used to enhance the bonding characteristics of an adhesive.
- a multi-purpose adhesive-like material such as an epoxy, is applied to the two wood panels 1000 a and 1000 b to secure the two panels together.
- Adhesive is also applied to the wood surfaces that mate with the inner portion 1022 .
- adhesive may also be applied to outer surface of the inner portion 1022 .
- the second piece of wood 1000 b is disposed opposite to the first panel of wood 1000 a , thereby enclosing the inner portions 1022 provided within the first piece of wood 1000 a .
- pressure is applied to the external surface of the panels thereby setting the adhesive and securing the two wood panels 1000 a and 1000 b together.
- the wood pieces 1000 a and 1000 b having approximately six inner portions 1022 are then split along the dotted lines, as indicated in FIG. 15, to provide approximately six hockey sticks.
- Alternate methods of setting the two shaft sections together can include but are not limited to the application of pressure and heat together, heat alone or pressure alone. Further, shafts may be made individually if desired.
- a plurality of semi-elliptical shaped grooves are provided by a router in the wood pieces. It should be appreciated that the router can form a channel having a variety of shapes, including but not limited to, a semi-circular, semi-rectangular, and semi-triangular configurations.
- the router can be employed to provide a deep channel 721 as seen FIG. 10, such that the elliptical shaped inner portion 722 is sandwiched with a seam along the minor axis of the resulting shaft.
- the router can be employed to provide a shallow channel 821 as seen in FIG. 12, such that the elliptical shaped inner portion 822 is sandwiched within a seam along the major axis of the resulting shaft.
- the most preferable method of manufacturing the composite shaft is by sealing the two shaft sections along the major axis, as shown in FIGS. 11 and 12.
Abstract
Description
- This application claims priority to a provisional application, Ser. No. 60/217,193 filed Jul. 10, 2000.
- The present invention relates generally to hockey sticks and more particularly to a graphite and wood construction for the shaft thereof that exhibits an improved stiffness to weight ratio and a method of making the same.
- The popularity of sporting events today has prompted many developments in sports equipment. In most sporting events there is a need to develop equipment that exhibits maximum performance with minimum manufacturing cost. One way of improving the equipment is through the use of new materials. Developments in manufacturing methods have also provided opportunities not only for product design, but also for cost reduction.
- Hockey is one sport in which the equipment has continued to develop. Although the functional requirements of a hockey stick have not changed, the design and manufacturing methods have progressed and evolved with a wide variety of materials now being used in the industry.
- A hockey stick shaft must be lightweight and have a strength sufficient to endure the stresses that arise in use. More particularly, it must be able to withstand the impacts that occur throughout the shaft due to stick to stick contact during play. The materials used in the construction of the shaft and its overall stiffness define the all important “feel” of the shaft. The shaft must be stiff, but provide sufficient flex and damping during wrist and slap shots for the player to maximize velocity, control and feedback from the shot.
- Hockey stick shafts can be made from a variety of materials including wood, aluminum, plastic and composite materials such as fiberglass, graphite and Kevlar. Materials are usually selected for their physical properties and cost in an attempt to improve performance while maintaining an affordable price for the shaft. Composite shafts are generally more expensive and can have a lower durability, but are still popular because of their lightweight and superior stiffness. Wood shafts are relatively inexpensive and have good “feel”, but they are not especially light, stiff or durable. Aluminum shafts can have a relatively short life as they are prone to bending failure. Although wood shafts are available with graphite or fiberglass laminated outer layers that provide increased stiffness, they are heavier and more expensive than all wood shafts and still do not have the stiffness of composite shafts.
- There continues to be a need for a hockey stick shaft that is relatively inexpensive, lightweight, stiff, durable and has a good “feel”.
- One object of the present invention is to provide a shaft and a method of making the same which has a reinforcing core and exhibits an improved stiffness to weight ratio.
- Another object of the present invention is to provide a shaft and method for making the same that exhibits increased durability while minimizing weight.
- Another object of the present invention is to provide a shaft with an internal composite core at a cost substantially less than an all composite shaft. It is unique to the present invention that the composite core is stiffer and/or lighter than the material removed from the shaft to create the bore or channel to accept the core.
- In particular, one embodiment of the present invention provides a hockey stick and method of making the same that includes a shaft. A composite member is provided within the interior of the shaft. The remainder of the shaft is preferably made of wood. The wooden portion is provided with one or more bores or channels which provide a volume within the interior of the shaft to receive the composite member. The composite member is preferably made of a fiber/resin composite such as graphite. Various designs or types of composite core configurations may be applied throughout the interior of the shaft. The presence of the composite core provides a stiffness to weight ratio not realizable in an all wood shaft or a shaft of wood with outer composite laminates, but retains the desirable “feel” of a wood shaft.
- Although the present invention is directed to the manufacturing process and performance of a shaft for a hockey stick, similar techniques and manufacturing methods can be applied to various other sports equipment that includes shaft like embodiments such as lacrosse sticks, baseball bats, field hockey sticks and tennis rackets among others.
- Further areas of applicability of the present invention will become apparent from the detailed description provided hereinafter. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
- The present invention will become more fully understood from the detailed description and the accompanying drawings, wherein:
- FIG. 1 is a perspective view of a first preferred embodiment of a hockey stick of the present invention showing the shaft in two pieces merely for the purposes of illustration and explanation;
- FIG. 1a is a cross-sectional end view of the hockey stick of FIG. 1;
- FIG. 2 is a cross-sectional side view of the hockey stick, taken along sectional line2-2 of FIG. 1;
- FIG. 3 is a cross-sectional view of the shaft, taken along sectional line3-3 of FIG. 1;
- FIG. 3a is a cross-sectional end view of the shaft of a second alternative preferred embodiment of the hockey stick of the present invention;
- FIG. 4 is a cross-sectional end view of the shaft of a third alternative preferred embodiment of the hockey stick of the present invention;
- FIG. 5 is a cross-sectional end view of the shaft of a fourth alternative preferred embodiment of the hockey stick of the present invention;
- FIG. 6 is a cross-sectional end view of the shaft of a fifth alternative preferred embodiment of the hockey stick of the present invention;
- FIG. 7 is a cross-sectional end view of the shaft of a sixth alternative preferred embodiment of the hockey stick of the present invention;
- FIG. 8 is a cross-sectional side view of the shaft of FIG. 7, taken along sectional line8-8 in FIG. 7;
- FIG. 9 is a cross-sectional view of the shaft of a seventh alternative preferred embodiment of the hockey stick of the present invention;
- FIG. 10 is an exploded end view showing the components of the shaft shown in FIG. 9;
- FIG. 11 is a cross-sectional view of the shaft of eighth alternative preferred embodiment of the hockey stick of the present invention;
- FIG. 12 is an exploded end view showing the components of the shaft shown in FIG. 11;
- FIG. 13 is a perspective view of a wood panel substrate used in the manufacturing process of the present invention;
- FIG. 14 is a perspective view of the wood panel substrate of FIG. 14 having composite inner portions provided; and
- FIG. 15 is a perspective view of the manufacturing process of the present invention.
- The following description of the preferred embodiments is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses.
- Referring first to FIG. 1, a
hockey stick 10 is shown having ashaft 12 and ablade 14. Theshaft 12 of thehockey stick 10 has afirst end 16 opposite asecond end 18. Thefirst end 16 of theshaft 12 is defined where theshaft 12 is coupled with theblade 14 of the hockey stick 10 (the shaft/blade interface). Thesecond end 18 of theshaft 12 is defined opposite the shaft/blade interface 16 wherein the player grips thehockey shaft 12. - It is preferable that the
shaft 12 of thehockey stick 10 has a cross-sectional rectangular geometry, as in traditional hockey sticks. However, it should be appreciated that cross-sectional shapes can vary in geometrical configuration depending on the preferred performance and manufacture of the hockey stick. - As seen in FIGS. 1 and 1a, the
hockey stick 10 includes anouter portion 20 and aninner portion 22. Theouter portion 20 preferably consists of wood while theinner portion 22 preferably consists of a composite. To accommodate theinner portion 22, a channel or bore 20 a is provided through the body of theshaft 12. Theinner portion 22 of theshaft 12 is provided within the channel/bore 20 a and is surrounded by theouter portion 20 of the shaft. - The
outer portion 20 of theshaft 12 is preferably made of aspen, although various types of wood or wood laminates having similar characteristics can be used. As will be apparent from the following description, there are numerous benefits to combining a woodenouter portion 20 with a compositeinner portion 22. The benefits include reducing the weight of the stick, maintaining the desirable “feel” of a wood stick, and increasing the stiffness of theshaft 12. - With reference to FIG. 2, a longitudinal cross-sectional view of the interior construction of the
shaft 12 is shown. As can been seen, theinner portion 22 of theshaft 12 is disposed within theouter portion 20. The size and shape of theinner portion 22 reflects the dimensions provided by the channel/bore 20 a. - In the preferred embodiment, the
inner portion 22 extends along the length of theshaft 12, thereby providing increased stiffness throughout various key points along theshaft 12, most importantly where maximum stresses develop. As seen in FIG. 2, theinner portion 22 extends throughout substantially the entire length of theshaft 12. It should be appreciated that the length of theinner portion 22 can vary, as well as be selectively distributed anywhere along the longitudinal axis CL of theshaft 12. - The
inner portion 22 is preferably made of a carbon fiber/epoxy resin composite. The carbon fiber/epoxy resin composite is also known in the art as a “graphite composite”. Although graphite composite is the most preferable material for theinner portion 22, various other fibers such as glass or kevlar can be used in alternate embodiments of the present invention. Further, a metal core may also be used. - One of unique features of the
inner portion 22 is the adaptability of theinner portion 22 to be manufactured to reflect the various needs of ahockey shaft 12. The carbon fiber/epoxy resin contains a plurality of fibers. The thickness and orientation of the fibers in the composite affect the degree of stiffness that theinner portion 22 exhibits. In order to obtain a specific stiffness, the fibers are preferably oriented parallel to the longitudinal center axis of thehockey stick shaft 12, indicated by line CL. The fibers of the composite can be oriented in a variety of directions to adjust the stiffness characteristics of theinner portion 22. Such degrees of change include but are not limited to, a rotation of the fibers ±45 degrees relative to the longitudinal center axis CL. - In addition to the orientation of the fibers, the positioning of the
inner portion 22 within theshaft 12 provides varying degrees of stiffness depending on the quantity used and location of theinner portion 22 relative to the remainder of theshaft 12. The degree of stiffness further depends on the cross-sectional area and geometric configuration of theinner portion 22, as well as the length and distribution of theinner portion 22 throughout theshaft 12. Accordingly, various embodiments of the present invention provide a variety of stiffness characteristics to ahockey stick shaft 12 depending on the desired performance of the stick during play. - As can be seen in FIGS. 3 through 12, alternate cross-sectional views are shown of the composite shaft. Each figure represents an alternate embodiment or exploded view of an inner portion provided within an outer portion of a shaft. Although the manufacturing technique is basically the same for each embodiment, slight variations are made in the process to obtain alternate types of inner portion configurations. In each embodiment like reference numerals are used to indicate like components but increased by 100 for clarity.
- In particular, FIG. 3 illustrates an elevational cross-sectional view of a
shaft 112 having a solidinner portion 122 disposed along the longitudinal center axis of theshaft 112. The solidinner portion 122 is preferably made of a graphite composite and is surrounded by a solid woodenouter portion 120. The solid compositeinner portion 122 has a cross sectional shape that is substantially elliptical wherein the major axis is preferably aligned along the axis D-D. The solidinner portion 122 is placed within theshaft 112 following the removal of the corresponding wood portion of theshaft 112. - FIG. 3a shows a hollow elliptical shaped
inner portion 222 disposed within theshaft 212 of the hockey stick. This particular alternate embodiment provides the maximum stiffness-to-weight ratio while maintaining a desirablelow weight shaft 212. As previously stated with reference to the solidinner portion 122 of FIG. 3, the hollow ellipticalinner portion 222 is most preferably made of a graphite composite. Alternate types of hollow shaped inner portions can be can be disposed within the woodouter portion 220 of a hockey stick, including the use of various types of metal tubing. The hollowelliptical configuration 222 of theinner portion 222 provides an increase in stiffness desirable for a composite hockey stick, while eliminating the added weight typically provided by a solid insert. - Although FIGS. 3 and 3a provide substantially elliptical shaped
inner portions - FIGS. 4 through 7 illustrate alternate embodiments of a wood hockey shaft having an inner portion consisting of a different material. The inner portion can include a plurality of core elements, all of which are disposed along the longitudinal axis of the shaft. Each of the additional core elements provide unique stiffness characteristics to the wooden shaft of the hockey stick.
- FIG. 4 provides a solid rectangular shaped composite
inner portion 322 disposed along the longitudinal center axis of theshaft 312. In contrast to alternate embodiments, the substantially rectangularinner portion 322 provides increased stiffness towards the corners of theshaft 312. The solid rectangularinner portion 322 is provided within a woodenouter portion 320. As mentioned previously, it should be appreciated that the cross sectional shape can be selected from a variety of geometries, including, but not limited to a circle, a square or a rectangle. - FIG. 5 provides a cross-sectional view of a
shaft 412 having an inner portion 422 comprised of five core elements 424 a-424 e. Each of the fivecore elements - As can be seen in FIG. 5, the shaft is provided with a
primary core element 424 a, and foursecondary core elements primary core element 424 a is a hollow elliptical shaped core element, as previously suggested in FIG. 3a. The four secondary core elements 424 b-424 e are substantially the same shape and size as each other, although various modifications can be made to the configuration of each of the core elements 424 b-424 e. It is preferable that the cross-section of the secondary cores 424 b-424 e are substantially circular such that rod or tube-like elements are provided, however it should be appreciated that the cross sections can be of any shape. - The secondary core elements424 b-424 e are provided towards the periphery of the
shaft 412, more particularly towards the outer four corners 413 a-413 d of the substantially rectangular shapedshaft 412. Theprimary core element 424 a is disposed along the longitudinal center axis of theshaft 412. Although theprimary core element 424 a of the inner portion 422 is shown as a hollow elliptical shaped element, various configurations can be applied. - FIG. 6 demonstrates an inner portion522 comprised of a plurality of substantially equal size core elements 524 surrounded by an outer wooden portion 520. The equal sized core elements 524 are disposed uniformly throughout the
shaft 512 of the hockey stick. More particularly, FIG. 6 illustrates an embodiment of ashaft 512 having six core elements 524 a-524 f. The core elements 524 a-524 f are preferably made of a graphite composite, although various types of materials can be used as previously suggested. The plurality of core elements 524 a-524 f are distributed throughout theshaft 512 to support the stress that develops in the hockey stick. The core elements 524 a-524 f preferably consist of carbon-based rods. Various lengths of rods may be used during manufacture to obtain the desired stiffness-to-weight ratio. - FIG. 7 illustrates a sixth alternate embodiment wherein the cross section of the
shaft 612 provides aninner portion 622 having a substantially I-shaped configuration surrounded by an outerwooden portion 620. As shown in FIG. 7, the I-shapedinner portion 622 is oriented with its major axis aligned with the major axis of theshaft 612. Various orientations of the I-shapedconfiguration 622 can be applied within theshaft 612, such as the I-shapedinner element 622 can be oriented orthogonal to the major axis of theshaft 612. Various orientations provide varying degrees of stiffness to theshaft 612. - With reference to FIG. 8, which is a cross-sectional view of FIG. 7 taken along line8-8, a plurality of bores or holes 625 a-c can be formed in the center region of the I-shaped
inner portion 622. The series of holes 625 a-c are preferably left hollow to minimize the overall weight of the hockey stick. Although these holes are preferably left hollow, various types of composite could be added to provide additional stiffness to the shaft. - FIGS. 9 and 10 provide a seventh alternate embodiment of a
shaft 712 having an outerwooden portion 720 and an innercomposite portion 722. The outerwooden portion 720 is divided into afirst section 720 a and asecond section 720 b. The twosections seam 723 provided along the minor axis of theshaft 712 by an adhesive. Theinner portion 722 is shown as a substantially elliptical hollow composite, although various alternate types of inner portions are applicable. The twosections outer portion 720 haveprotective side portions shaft 712. Theprotective side portions - The exploded view, as shown in FIG. 10, illustrates the combination of the components that make up the shaft.
- FIGS. 11 and 12 provide an eighth alternate embodiment and an exploded view of a
shaft 812 having an outerwooden portion 820 and an innercomposite portion 822. As previously described in FIG. 9, the outerwooden portion 820 is divided into afirst section 820 a and asecond section 820 b. Contrary to FIG. 9, the twosections seam 823 provided along the major axis of theshaft 812 by an adhesive. According to the preferred embodiment, theinner portion 822 is shown as a substantially elliptical hollow composite, although various alternate types of inner portions are applicable. Further contrary to FIGS. 9 and 10, protective side portions are not provided. This particular feature may be optionally applied based on the specific needs and manufacturing of the shaft. - A manufacturing technique used to obtain the various alternate embodiments of the composite shaft will now be described. FIGS. 13 through 15 demonstrate the various stages in the manufacturing process.
- As can be seen in FIG. 13, the length of the
first wood piece 1000 a used is substantially the same as the desired length of the shaft, whereas the width is sufficient enough to yield approximately six shafts. The wood used in the manufacturing method is preferably aspen. The manufacturing method involves machining a plurality of grooves orchannels 1021 a within a first piece ofwood 1000 a thereby providing thefirst section 1020 a of theouter portion 1020 of the shaft 1012. A router is typically used to obtain the plurality of channels, although alternate techniques may be applied. Although various shaped grooves orchannels 1021 a may be provided, according to each of the alternate embodiments previously described, the most preferable are semi-elliptical shapedgrooves 1021 a. - According to FIG. 14, a plurality of composite
inner portions 1022 are placed within thesemi-elliptical channels 1021 a provided by the first piece ofwood 1000 a. - A second piece of
wood 1000 b, as shown in FIG. 15, is provided having complimentary semi-elliptical shaped channels orgrooves 1021 b and positioned relative to the first piece ofwood 1000 a having thechannels 1021 a that contain the compositeinner portions 1022. The second piece ofwood 1000 b provides thesecond section 1020 b of theouter portion 1020. - Prior to securing the planar surfaces of the two
wood panels wood panels inner portion 1022. Optionally, adhesive may also be applied to outer surface of theinner portion 1022. - Following the application of the adhesive to the planar surfaces of the two
wood panels wood 1000 b is disposed opposite to the first panel ofwood 1000 a, thereby enclosing theinner portions 1022 provided within the first piece ofwood 1000 a. Once the twowood panels wood panels wood pieces inner portions 1022 are then split along the dotted lines, as indicated in FIG. 15, to provide approximately six hockey sticks. - Alternate methods of setting the two shaft sections together can include but are not limited to the application of pressure and heat together, heat alone or pressure alone. Further, shafts may be made individually if desired.
- Now referring back to FIGS.9-12 and in combination with FIGS. 13-15, alternate approaches to preparing the composite shaft according to the preferred method of manufacturing are demonstrated.
- As previously described, a plurality of semi-elliptical shaped grooves, more specifically six, are provided by a router in the wood pieces. It should be appreciated that the router can form a channel having a variety of shapes, including but not limited to, a semi-circular, semi-rectangular, and semi-triangular configurations.
- The router can be employed to provide a
deep channel 721 as seen FIG. 10, such that the elliptical shapedinner portion 722 is sandwiched with a seam along the minor axis of the resulting shaft. Alternatively, the router can be employed to provide ashallow channel 821 as seen in FIG. 12, such that the elliptical shapedinner portion 822 is sandwiched within a seam along the major axis of the resulting shaft. Although both techniques can be used, the most preferable method of manufacturing the composite shaft is by sealing the two shaft sections along the major axis, as shown in FIGS. 11 and 12. - Although the preferred method of manufacturing is provided, alternate methods of manufacturing such as boring channels through a solid wood shaft and telescopically inserting the composite core element within the shaft can be applied.
- The description of the invention is merely exemplary in nature and, thus, variations that do not depart from the gist of the invention are intended to be within the scope of the invention. Such variations are not to be regarded as a departure from the spirit and scope of the invention.
Claims (30)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/898,301 US20020037780A1 (en) | 2000-07-10 | 2001-07-03 | Hockey stick with reinforced shaft |
PCT/US2001/021636 WO2002004078A1 (en) | 2000-07-10 | 2001-07-10 | Hockey stick with reinforced shaft |
CA002413541A CA2413541A1 (en) | 2000-07-10 | 2001-07-10 | Hockey stick with reinforced shaft |
AU2002218754A AU2002218754A1 (en) | 2000-07-10 | 2001-07-10 | Hockey stick with reinforced shaft |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US21719300P | 2000-07-10 | 2000-07-10 | |
US09/898,301 US20020037780A1 (en) | 2000-07-10 | 2001-07-03 | Hockey stick with reinforced shaft |
Publications (1)
Publication Number | Publication Date |
---|---|
US20020037780A1 true US20020037780A1 (en) | 2002-03-28 |
Family
ID=26911706
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/898,301 Abandoned US20020037780A1 (en) | 2000-07-10 | 2001-07-03 | Hockey stick with reinforced shaft |
Country Status (4)
Country | Link |
---|---|
US (1) | US20020037780A1 (en) |
AU (1) | AU2002218754A1 (en) |
CA (1) | CA2413541A1 (en) |
WO (1) | WO2002004078A1 (en) |
Cited By (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20030008734A1 (en) * | 2001-06-28 | 2003-01-09 | Montreal Sports Oy | Method for manufacturing shaft of stick, and shaft |
US6684554B2 (en) * | 2001-09-27 | 2004-02-03 | Kuo-Pin Yu | Hand net frame |
US6702697B1 (en) | 2000-10-23 | 2004-03-09 | 2946-6380 Quebec Inc. | Hollow wooden hockey stick |
US20040102263A1 (en) * | 2002-11-05 | 2004-05-27 | Ray Blotteaux | Impact layer technology shaft |
US20050187046A1 (en) * | 2004-01-26 | 2005-08-25 | Kavanaugh Gerald W. | Hockey stick handle |
US20060252423A1 (en) * | 2003-08-05 | 2006-11-09 | Roamware, Inc. | Method and apparatus by which a home network can detect and counteract visited network inbound network traffic redirection |
US20070072709A1 (en) * | 2004-01-09 | 2007-03-29 | Tucker Richard B Sr | Back and edge weighted field hockey sticks |
US20070243957A1 (en) * | 2006-04-18 | 2007-10-18 | Henry Hsu | Buffering structure for hollow and tubular sport items |
US20080287226A1 (en) * | 2007-05-14 | 2008-11-20 | Appleton Douglas S | Structured lacrosse stick |
US20110124446A1 (en) * | 2009-11-23 | 2011-05-26 | Entrotech Composites, Llc | Reinforced Objects |
US20130005516A1 (en) * | 2011-06-28 | 2013-01-03 | Cain & Company | Reinforced Bamboo Lacrosse Shaft |
US20130287976A1 (en) * | 2012-04-26 | 2013-10-31 | Integran Technologies Inc. | Anisotropic elongated metallic structural member |
US20150126309A1 (en) * | 2013-11-04 | 2015-05-07 | Bauer Hockey Inc. | Hockey stick or other sports implement |
US9044658B2 (en) | 2011-11-04 | 2015-06-02 | Warrior Sports, Inc. | I-beam construction in a hockey blade core |
US9056230B2 (en) * | 2011-11-30 | 2015-06-16 | Acushnet Company | Composite golf club head with improved sound |
US9511268B1 (en) * | 2015-06-02 | 2016-12-06 | Michael Levy | Stick assembly |
US20170296892A1 (en) * | 2016-04-14 | 2017-10-19 | Sport Maska Inc. | Sports shaft with stiffening bumper |
US20200222771A1 (en) * | 2017-05-17 | 2020-07-16 | Bauer Hockey, Llc | Hockey Stick With Spine-Reinforced Paddle |
US11097146B2 (en) * | 2017-12-01 | 2021-08-24 | Caxy Sports, Llc | Weighted training equipment |
US20210379439A1 (en) * | 2017-12-01 | 2021-12-09 | Caxy Sports, Llc | Weighted Training Equipment |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7963868B2 (en) | 2000-09-15 | 2011-06-21 | Easton Sports, Inc. | Hockey stick |
US7232386B2 (en) | 2003-05-15 | 2007-06-19 | Easton Sports, Inc. | Hockey stick |
US7914403B2 (en) | 2008-08-06 | 2011-03-29 | Easton Sports, Inc. | Hockey stick |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
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US4200479A (en) * | 1976-03-12 | 1980-04-29 | La Corporation Inglasco Ltee | Method of making a hockey stick |
FI101769B (en) * | 1996-11-07 | 1998-08-31 | Khf Sports Oy | Shaft for an ice hockey club or for a club intended for a game of similar type |
US6033328A (en) * | 1996-11-04 | 2000-03-07 | Sport Maska Inc. | Hockey stick shaft |
US6033327A (en) * | 1998-07-16 | 2000-03-07 | Bird; Timothy E. | Variable rigidity hockey stick |
US6113508A (en) * | 1998-08-18 | 2000-09-05 | Alliance Design And Development Group | Adjusting stiffness and flexibility in sports equipment |
-
2001
- 2001-07-03 US US09/898,301 patent/US20020037780A1/en not_active Abandoned
- 2001-07-10 WO PCT/US2001/021636 patent/WO2002004078A1/en active Application Filing
- 2001-07-10 CA CA002413541A patent/CA2413541A1/en not_active Abandoned
- 2001-07-10 AU AU2002218754A patent/AU2002218754A1/en not_active Abandoned
Cited By (34)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6702697B1 (en) | 2000-10-23 | 2004-03-09 | 2946-6380 Quebec Inc. | Hollow wooden hockey stick |
US20040089416A1 (en) * | 2000-10-23 | 2004-05-13 | 2946-6380 Quebec Inc. C/Of Production P.H. Enr. | Hollow wooden hockey stick |
US6942587B2 (en) | 2000-10-23 | 2005-09-13 | 2946-6380 Quebec Inc. | Hollow wooden hockey stick |
US6939257B2 (en) * | 2001-06-28 | 2005-09-06 | Montreal Sports Oy | Method for manufacturing shaft of stick, and shaft |
US20030008734A1 (en) * | 2001-06-28 | 2003-01-09 | Montreal Sports Oy | Method for manufacturing shaft of stick, and shaft |
US6684554B2 (en) * | 2001-09-27 | 2004-02-03 | Kuo-Pin Yu | Hand net frame |
US20040102263A1 (en) * | 2002-11-05 | 2004-05-27 | Ray Blotteaux | Impact layer technology shaft |
US7128669B2 (en) | 2002-11-05 | 2006-10-31 | Sport Maska Inc. | Impact layer technology shaft |
US20060252423A1 (en) * | 2003-08-05 | 2006-11-09 | Roamware, Inc. | Method and apparatus by which a home network can detect and counteract visited network inbound network traffic redirection |
US20070072709A1 (en) * | 2004-01-09 | 2007-03-29 | Tucker Richard B Sr | Back and edge weighted field hockey sticks |
US7462118B2 (en) * | 2004-01-09 | 2008-12-09 | Stx, Llc | Back and edge weighted field hockey sticks |
US7108619B2 (en) * | 2004-01-26 | 2006-09-19 | Kavanaugh Gerald W | Hockey stick handle |
US20050187046A1 (en) * | 2004-01-26 | 2005-08-25 | Kavanaugh Gerald W. | Hockey stick handle |
US20070243957A1 (en) * | 2006-04-18 | 2007-10-18 | Henry Hsu | Buffering structure for hollow and tubular sport items |
US20080287226A1 (en) * | 2007-05-14 | 2008-11-20 | Appleton Douglas S | Structured lacrosse stick |
US7651418B2 (en) * | 2007-05-14 | 2010-01-26 | Talon Lacrosse, Llc | Structured lacrosse stick |
US20110124446A1 (en) * | 2009-11-23 | 2011-05-26 | Entrotech Composites, Llc | Reinforced Objects |
US8747261B2 (en) * | 2009-11-23 | 2014-06-10 | Entrotech Composites, Llc | Reinforced objects |
US20140235376A1 (en) * | 2009-11-23 | 2014-08-21 | Entrotech Composites, Llc | Reinforced Objects |
US8834305B2 (en) * | 2011-06-28 | 2014-09-16 | Bamshaft, Inc. | Reinforced bamboo lacrosse shaft |
US20130005516A1 (en) * | 2011-06-28 | 2013-01-03 | Cain & Company | Reinforced Bamboo Lacrosse Shaft |
US9044658B2 (en) | 2011-11-04 | 2015-06-02 | Warrior Sports, Inc. | I-beam construction in a hockey blade core |
US9573031B2 (en) | 2011-11-04 | 2017-02-21 | Warrior Sports, Inc. | I-beam construction in a hockey blade core |
US20150238828A1 (en) * | 2011-11-30 | 2015-08-27 | Acushnet Company | Composite golf club head with improved sound |
US9056230B2 (en) * | 2011-11-30 | 2015-06-16 | Acushnet Company | Composite golf club head with improved sound |
US20130287976A1 (en) * | 2012-04-26 | 2013-10-31 | Integran Technologies Inc. | Anisotropic elongated metallic structural member |
US20150126309A1 (en) * | 2013-11-04 | 2015-05-07 | Bauer Hockey Inc. | Hockey stick or other sports implement |
US9511268B1 (en) * | 2015-06-02 | 2016-12-06 | Michael Levy | Stick assembly |
US20170296892A1 (en) * | 2016-04-14 | 2017-10-19 | Sport Maska Inc. | Sports shaft with stiffening bumper |
US10363468B2 (en) * | 2016-04-14 | 2019-07-30 | Sport Maska Inc. | Sports shaft with stiffening bumper |
US20200222771A1 (en) * | 2017-05-17 | 2020-07-16 | Bauer Hockey, Llc | Hockey Stick With Spine-Reinforced Paddle |
US11534669B2 (en) * | 2017-05-17 | 2022-12-27 | Bauer Hockey, Llc | Hockey stick with spine-reinforced paddle |
US11097146B2 (en) * | 2017-12-01 | 2021-08-24 | Caxy Sports, Llc | Weighted training equipment |
US20210379439A1 (en) * | 2017-12-01 | 2021-12-09 | Caxy Sports, Llc | Weighted Training Equipment |
Also Published As
Publication number | Publication date |
---|---|
WO2002004078A1 (en) | 2002-01-17 |
AU2002218754A1 (en) | 2002-01-21 |
CA2413541A1 (en) | 2002-01-17 |
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