US3622172A - Torsion land skier - Google Patents

Torsion land skier Download PDF

Info

Publication number
US3622172A
US3622172A US26883A US3622172DA US3622172A US 3622172 A US3622172 A US 3622172A US 26883 A US26883 A US 26883A US 3622172D A US3622172D A US 3622172DA US 3622172 A US3622172 A US 3622172A
Authority
US
United States
Prior art keywords
shell
rollers
skier
upwardly
ski
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US26883A
Inventor
Charles W Goodwin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TURF SKI Inc
Original Assignee
TURF SKI Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by TURF SKI Inc filed Critical TURF SKI Inc
Application granted granted Critical
Publication of US3622172A publication Critical patent/US3622172A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C5/00—Skis or snowboards
    • A63C5/035—Skis or snowboards with ground engaging rolls or belts

Definitions

  • TORSION LAND SKIER This invention is concerned with a device that permits skiing on dry land such as grass or weeds and is an improvement of U.S. Pat. No. 3,282,598 which was issued to me on Nov. 1, 1966.
  • curvature of the surface is more geometrical and consequently more efficient, particularly in the area forward of the skier and proximate the brake shoe in the rear.
  • an elongated molded shell that has a concave inner surface and in which is housed a plurality of rollers.
  • the rollers are barrel shaped having a convex periphery and mounted on ball bearings.
  • the rollers are located proximate to each other within the elongated shoe.
  • the elongated shoe has an upper forward surface with a roller inserted therein adaptable to receive rough terrain.
  • a plastic drag shoe is located within the rear of the housing which enables the user to control the skid or braking action of the ski as well as to avoid rough terrain.
  • FIG. 1 is a perspective top view of the skier.
  • FIG. 2 is a side elevation view of the skier.
  • FIG. 3 is a front elevation view, part in cross section, of the roller.
  • FIG. 4 is a perspective view of the inside of the shoe plate.
  • FIG. 5 is a plan view of the bottom of the skier.
  • the shell 1 of the skier is formed from a mold and is a unitary integral unit.
  • the material employed is synthetic and is of a strong plastic material. This is both resilient and unbreakable.
  • the shell 1 which, as can be seen in the various views of the drawing, is in the general shape of a ski having a front surface that extends with an upward curvature at 5 and having a lower bottom surface that extends upwardly at 12.
  • the rollers 2 which are made of a hard rubber-type material are mounted within the frame of the shell on the inside hollow area 13 between locknuts 4.
  • rollers 2 For a more detailed description of the rollers 2 reference is made particularly to the view of FIG. 3.
  • An axle 3 runs through thegeometrical center of the roller 2 extending out from each si e thereof.
  • the end 8 of the axle 3 extends outwardly and connects to the nuts 4 which are fastened on the outer surface of the shell 1.
  • the roller bearings 9 which circumvent the axle 3 can be seen in detail.
  • the brake shoe 6 is mounted in the rear under portion of shell 1 at 12 .
  • the brake shoe 6 can be seen clearly in the view of FIG. 4.
  • the brake shoe 6 is hollow on the inside at 7. There are openings at 12a which enable the screws and bolts 11 to secure the brake shoe surface 6 within the shell 1.
  • the lower portion of the brake shoe 6 extends slightly downward and in a slightly curved position from the bottom of ski shell 1.
  • Mounted on the top surface of the shell 1 in the openings 14 are the shoe supports 10 which are shown in dotted lines in the view of FIG. 2.
  • one of the applications of the within skier is for use with a snowmobile which can be operated out of season when there is no snow with the use of these skiers instead of snow-type skis.
  • Turf Skier As this device is called, is attached to the shoe of the user. This can be done by the clamping procedure that is customary to a winter type ski such as are indicated by dotted lines in FIG. 2 at 10.
  • the center of gravity is on the horizontal plane where the ski shoe is located and particularly where six of the rollers 2 are located, excluding the most forward roller.
  • roller 2 Forward of the six rollers 2 is another roller 2 located within the curved surface at 5.
  • the purpose of this particular roller and the curved surface at 5 is to permit deflection for any ground obstacle such as stones or other protruding objects.
  • the brake shoe 6 which is mounted within this surface is for the purpose of when there is a change of gravity from the rollers 2 to the rear of the shell 1 to give a stabilizing effect for slowing down, turning or stopping.
  • the brake shoe 6 is for braking and controlling the speed of the skier.
  • the shape of the shell 1 in the front with the curved upper surface 5 and the enclosed top surface is an important improvement over the prior disclosure U.S. Pat. No. 3,282,598 because it absorbs shock when the ski contacts rocks and travels over rough terrain.
  • brake shoe 6 is also an improvement in that it is less likely to wear out since it is hollow on the inside and absorbs the shock of the braking action much easier than the solid brake shoe of the aforesaid patent.
  • a land skier having a unitary, upside down U-shaped shell, a plurality of rollers, a ball bearing means within said roi- 5 lers, said rollers connected to each side of said unitary shell within the U-shape thereof, the front end of said shell rising upwardly forming a curvature similar to a ski, one of said rollers being mounted in that portion of the curvature that rises up being above the plane of the other said rollers, the rear bottom edges of the sides of said U-shaped shell tapering upwardly away from the bottom plane of said rollers, a unitary brake shoe being mounted to the rear of said rollers within that portion of said U-shaped shell that rises upwardly aforesaid, said brake shoe being a unitary member having a lower surface and four upwardly extending side surfaces means on each of two sides of said surfaces of said brake shoe for fastening to the sides of the U-shaped shell, clamping means mounted on the upper surface of said shell for mounting and locking a ski boot thereto, said upwardly extending

Abstract

A land skier of a resilient plastic material molded into a shell-shaped substantially like a ski with lateral sides that depend down from an upper skier supporting surface in the shape of an upside down U with a plurality of ball bearing rollers having beveled cylindrical surfaces mounted between the sides of the shell beneath the foot of the skier. The forward end of the shell is curved upwardly like a ski with the foremost roller mounted in the upwardly curved portion and the lower rear edges of the shell taper upwardly toward the rear with a plastic braking surface mounted between the sides of the shell.

Description

United States atent [72] inventor Charles W. Goodwin West Dover, Vt. [21 1 Appl. No. 26,883 [22] Filed Apr. 9, 1970 145] Patented Nov. 23, 1971 [73] Assignee TurlSkiJne.
Somervllie, NJ.
[54] TORSION LAND SKIER 1 Claim, 5 Drawing Figs.
[52] US. Cl 280/ll.2, 280/11.22.301/5.7 [51] Int. Cl ..A63c 17/06, A63c 17/14 [50] Field ofSearch 280/1 1.1 BT,11.22.l1.23,7.13.1l.19,11.23, 11.2; 301/531, 5.7
[56] References Cited UNITED STATES PATENTS 1.777.698 10/1930 Lofstrand 280/1 1.19 X 2.485.756 10/1949 Meehan 280/1 1.22 X
3.282.598 11/1966 Goodwin ZED/11.22 X
3.287.023 11/1966 Ware 280/1 1.22 X
3.365.208 l/l968 Blanchard 280/1 1.23 FOREIGN PATENTS 247.346 10/1963 Australia 280/1 l.l BT
592.486 2/1934 Germany 301/57 Primary Examiner- Benjamin Hersh Assistant E.raminerMilton L. Smith Alrorney- Leonard S. Michelman ABSTRACT: A land skier of a resilient plastic material molded into a shell-shaped substantially like a ski with lateral sides that depend down from an upper skier supporting surface in the shape of an upside down U with a plurality of ball bearing rollers having beveled cylindrical surfaces mounted between the sides of the shell beneath the foot of the skier. The forward end of the shell is curved upwardly like a ski with the foremost roller mounted in the upwardly curved portion and the lower rear edges of the shell taper upwardly toward the rear with a plastic braking surface mounted between the sides of the shell.
TORSION LAND SKIER This invention is concerned with a device that permits skiing on dry land such as grass or weeds and is an improvement of U.S. Pat. No. 3,282,598 which was issued to me on Nov. 1, 1966.
With the advent of the snowmobile in addition to winter skiing, this leisure time sport becomes dormant during the summer months when there is no snow. The ski slopes and tows remain inactive out of season, and nonremunerative.
It is a purpose of the within invention to provide a summer ski for use with snowmobiles and also for use by people for the purpose of skiing on grass, weeds and the like where there is no snow.
It is a principal object of the within invention to improve the maneuverability of a dry land skier.
It is still a further object of the within invention that it is adaptable for use by skiers who normally winter ski.
It is still an additional object of the invention that it is inexpensive in the cost of manufacture.
it is yet a further object of the within invention to provide a summer skier that may be assembled from molded components.
It is also an additional object of the within invention that it is made out of a material that is resilient whereby said material being less likely to break under severe conditions and is adaptable to absorb the shock of a rough terrain.
One of the problems with the original land skier as described in U.S. Pat. No. 3,282,598 was the fact that the surfaces forward of the area where the ski shoes are attached, had open rollers and the surface to the rear had a brake shoe that was below the surface of the plane where the ski shoe is mounted. In traveling over weeds, grass, and the like, a great amount of debris accumulated from the weeds above the skier and makes it necessary for a cleansing to remove the debris therefrom. With the closure type of shell now employed, in this invention, this problem has been eliminated. Further, the ski as now designed has a much more streamlined appearance, and is, therefore, substantially free from debris forming therein.
Further, the curvature of the surface is more geometrical and consequently more efficient, particularly in the area forward of the skier and proximate the brake shoe in the rear.
These and other objects are obtained by the use of an elongated molded shell that has a concave inner surface and in which is housed a plurality of rollers. The rollers are barrel shaped having a convex periphery and mounted on ball bearings. The rollers are located proximate to each other within the elongated shoe. The elongated shoe has an upper forward surface with a roller inserted therein adaptable to receive rough terrain. A plastic drag shoe is located within the rear of the housing which enables the user to control the skid or braking action of the ski as well as to avoid rough terrain.
For a more detailed description of the within invention, reference is made to the following specification and in particular to the drawings in which:
FIG. 1 is a perspective top view of the skier.
FIG. 2 is a side elevation view of the skier.
FIG. 3 is a front elevation view, part in cross section, of the roller.
FIG. 4 is a perspective view of the inside of the shoe plate.
FIG. 5 is a plan view of the bottom of the skier.
The shell 1 of the skier is formed from a mold and is a unitary integral unit. The material employed is synthetic and is of a strong plastic material. This is both resilient and unbreakable.
The shell 1 which, as can be seen in the various views of the drawing, is in the general shape of a ski having a front surface that extends with an upward curvature at 5 and having a lower bottom surface that extends upwardly at 12. The rollers 2 which are made of a hard rubber-type material are mounted within the frame of the shell on the inside hollow area 13 between locknuts 4.
For a more detailed description of the rollers 2 reference is made particularly to the view of FIG. 3. An axle 3 runs through thegeometrical center of the roller 2 extending out from each si e thereof. The end 8 of the axle 3 extends outwardly and connects to the nuts 4 which are fastened on the outer surface of the shell 1. In the cross section of FIG. 3, the roller bearings 9 which circumvent the axle 3 can be seen in detail.
Mounted in the rear under portion of shell 1 at 12 is the brake shoe 6. The brake shoe 6 can be seen clearly in the view of FIG. 4. The brake shoe 6 is hollow on the inside at 7. There are openings at 12a which enable the screws and bolts 11 to secure the brake shoe surface 6 within the shell 1.
The lower portion of the brake shoe 6 extends slightly downward and in a slightly curved position from the bottom of ski shell 1. Mounted on the top surface of the shell 1 in the openings 14 are the shoe supports 10 which are shown in dotted lines in the view of FIG. 2.
As stated previously, one of the applications of the within skier is for use with a snowmobile which can be operated out of season when there is no snow with the use of these skiers instead of snow-type skis.
In operation, the Turf Skier, as this device is called, is attached to the shoe of the user. This can be done by the clamping procedure that is customary to a winter type ski such as are indicated by dotted lines in FIG. 2 at 10.
When the skier places his weight forward on the within skis, the center of gravity is on the horizontal plane where the ski shoe is located and particularly where six of the rollers 2 are located, excluding the most forward roller.
Forward of the six rollers 2 is another roller 2 located within the curved surface at 5. The purpose of this particular roller and the curved surface at 5 is to permit deflection for any ground obstacle such as stones or other protruding objects.
To the rear of the shell 1 is the inclined surface 12 and the lower portion thereof.
The brake shoe 6 which is mounted within this surface is for the purpose of when there is a change of gravity from the rollers 2 to the rear of the shell 1 to give a stabilizing effect for slowing down, turning or stopping. The brake shoe 6 is for braking and controlling the speed of the skier.
The shape of the shell 1 in the front with the curved upper surface 5 and the enclosed top surface is an important improvement over the prior disclosure U.S. Pat. No. 3,282,598 because it absorbs shock when the ski contacts rocks and travels over rough terrain.
The design and arrangement of brake shoe 6 is also an improvement in that it is less likely to wear out since it is hollow on the inside and absorbs the shock of the braking action much easier than the solid brake shoe of the aforesaid patent.
The improved design of the Turf Ski permits more control for reasons of torsion and weight control over my original conception.
In consideration of the foregoing I claim:
1. A land skier having a unitary, upside down U-shaped shell, a plurality of rollers, a ball bearing means within said roi- 5 lers, said rollers connected to each side of said unitary shell within the U-shape thereof, the front end of said shell rising upwardly forming a curvature similar to a ski, one of said rollers being mounted in that portion of the curvature that rises up being above the plane of the other said rollers, the rear bottom edges of the sides of said U-shaped shell tapering upwardly away from the bottom plane of said rollers, a unitary brake shoe being mounted to the rear of said rollers within that portion of said U-shaped shell that rises upwardly aforesaid, said brake shoe being a unitary member having a lower surface and four upwardly extending side surfaces means on each of two sides of said surfaces of said brake shoe for fastening to the sides of the U-shaped shell, clamping means mounted on the upper surface of said shell for mounting and locking a ski boot thereto, said upwardly extending portion of said shell tapering to an elliptical point, and the rear portion of the surface of said shell tapering towards a common point and being abutted at the end thereof.
i i IF 1

Claims (1)

1. A land skier having a unitary, upside down U-shaped shell, a plurality of rollers, a ball bearing means within said rollers, said rollers connected to each side of said unitary shell within the U-shape thereof, the front end of said shell rising upwardly forming a curvature similar to a ski, one of said rollers being mounted in that portion of the curvature that rises up being above the plane of the other said rollers, the rear bottom edges of the sides of said U-shaped shell tapering upwardly away from the bottom plane of said rollers, a unitary brake shoe being mounted to the rear of said rollers within that portion of said U-shaped shell that rises upwardly aforesaid, said brake shoe being a unitary member having a lower surface and four upwardly extending side surfaces means on each of two sides of said surfaces of said brake shoe for fastening to the sides of the Ushaped shell, clamping means mounted on the upper surface of said shell for mounting and locking a ski boot thereto, said upwardly extending portion of said shell tapering to an elliptical point, and the rear portion of the surface of said shell tapering towards a common point and being abutted at the end thereof.
US26883A 1970-04-09 1970-04-09 Torsion land skier Expired - Lifetime US3622172A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US2688370A 1970-04-09 1970-04-09

Publications (1)

Publication Number Publication Date
US3622172A true US3622172A (en) 1971-11-23

Family

ID=21834353

Family Applications (1)

Application Number Title Priority Date Filing Date
US26883A Expired - Lifetime US3622172A (en) 1970-04-09 1970-04-09 Torsion land skier

Country Status (1)

Country Link
US (1) US3622172A (en)

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3990713A (en) * 1975-09-02 1976-11-09 Hokanson Jack W Protective plate for a skateboard
US3995873A (en) * 1975-11-17 1976-12-07 Richard Cloutier Pantzar Skateboard
US4021052A (en) * 1976-04-21 1977-05-03 Knowles Lloyd C Land ski apparatus
US4031988A (en) * 1976-01-07 1977-06-28 David John Hill Stall control and wear block for recreational skate boards
US4040639A (en) * 1976-03-25 1977-08-09 Anthony Scardenzan Skateboard
USD245427S (en) * 1976-03-10 1977-08-16 Codi Corporation Wheeled paddle for use in furnace heat treating of articles
US4047727A (en) * 1976-09-17 1977-09-13 Mark Holladay Skateboard roller wheel assembly
FR2514650A1 (en) * 1981-10-15 1983-04-22 Ollivier Marcel Grass-ski base frame - has inverted U=section with longitudinal profile of snow-ski which runs on rollers mounted on transverse axles between flanges
US5188578A (en) * 1992-01-13 1993-02-23 Voigt Bruce S Skiiing simulator and training device
US5312258A (en) * 1992-11-13 1994-05-17 Sam J. Mulay Dry land snowboard training device
US5419570A (en) * 1993-07-19 1995-05-30 Bollotte ; Guy O. Skateboard having singular in line wheels
DE4424372A1 (en) * 1994-07-11 1996-01-18 Horst Kraus Ski roller
US5707068A (en) * 1995-11-21 1998-01-13 Bradfield; Athol George In-line skateboard
USD413954S (en) * 1998-02-27 1999-09-14 Carve Board Sports, Inc. Skateboard
US6059303A (en) * 1995-11-21 2000-05-09 Bradfield; Athol George In-line skateboard
US6237960B1 (en) * 1994-03-01 2001-05-29 Siegfried Dornhofer Roller-type skiing device for negotiating a slope
US6375204B1 (en) * 2001-01-22 2002-04-23 Wen-Wu Tu Pitching skate board
US6688613B1 (en) 1998-10-19 2004-02-10 John C. Malloy Roller skating device
WO2004062550A1 (en) * 2003-01-09 2004-07-29 Philip Raymond Hankin Exerciser
US20050006859A1 (en) * 2003-07-11 2005-01-13 Ryan Farrelly Personal transportation device for supporting a user's foot having multiple transportation attachments
US20060186617A1 (en) * 2003-07-11 2006-08-24 Ryan Farrelly Personal transportation device for supporting a user's foot having multiple transportation attachments
US20090174163A1 (en) * 2008-01-08 2009-07-09 Freeline Sports, Inc. Personal transportation device for supporting a user's foot
US20100090423A1 (en) * 2008-05-13 2010-04-15 Freeline Sports, Inc. Personal transportation device for supporting a user's foot
US20100092806A1 (en) * 2008-10-14 2010-04-15 Honeywell International Inc. Miniature powered antenna for wireless communications and related system and method
US20140066265A1 (en) * 2012-09-05 2014-03-06 Bryan P. Oliver Ski training device and method
US20140345178A1 (en) * 2010-10-05 2014-11-27 Brian Lewis Interchangeable graphic display system and method of making same
US10220293B2 (en) * 2016-03-09 2019-03-05 Lyle J. Noorlun Skateboard safety brake

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1777698A (en) * 1929-04-25 1930-10-07 Albin P Lofstrand Amphibian mobile carrier
DE592486C (en) * 1932-06-01 1934-02-08 Arthur Gaunitz Roller for roller skates
US2485756A (en) * 1946-12-16 1949-10-25 Reginald J Meehan Convertible ski
US3282598A (en) * 1964-08-27 1966-11-01 Charles W Goodwin Land skier
US3287023A (en) * 1964-07-16 1966-11-22 Chicago Roller Skate Co Roller skate
US3365208A (en) * 1966-02-02 1968-01-23 Duane E. Blanchard Roller skis

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1777698A (en) * 1929-04-25 1930-10-07 Albin P Lofstrand Amphibian mobile carrier
DE592486C (en) * 1932-06-01 1934-02-08 Arthur Gaunitz Roller for roller skates
US2485756A (en) * 1946-12-16 1949-10-25 Reginald J Meehan Convertible ski
US3287023A (en) * 1964-07-16 1966-11-22 Chicago Roller Skate Co Roller skate
US3282598A (en) * 1964-08-27 1966-11-01 Charles W Goodwin Land skier
US3365208A (en) * 1966-02-02 1968-01-23 Duane E. Blanchard Roller skis

Cited By (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3990713A (en) * 1975-09-02 1976-11-09 Hokanson Jack W Protective plate for a skateboard
US3995873A (en) * 1975-11-17 1976-12-07 Richard Cloutier Pantzar Skateboard
US4031988A (en) * 1976-01-07 1977-06-28 David John Hill Stall control and wear block for recreational skate boards
USD245427S (en) * 1976-03-10 1977-08-16 Codi Corporation Wheeled paddle for use in furnace heat treating of articles
US4040639A (en) * 1976-03-25 1977-08-09 Anthony Scardenzan Skateboard
US4021052A (en) * 1976-04-21 1977-05-03 Knowles Lloyd C Land ski apparatus
US4047727A (en) * 1976-09-17 1977-09-13 Mark Holladay Skateboard roller wheel assembly
FR2514650A1 (en) * 1981-10-15 1983-04-22 Ollivier Marcel Grass-ski base frame - has inverted U=section with longitudinal profile of snow-ski which runs on rollers mounted on transverse axles between flanges
US5188578A (en) * 1992-01-13 1993-02-23 Voigt Bruce S Skiiing simulator and training device
US5312258A (en) * 1992-11-13 1994-05-17 Sam J. Mulay Dry land snowboard training device
US5419570A (en) * 1993-07-19 1995-05-30 Bollotte ; Guy O. Skateboard having singular in line wheels
US6237960B1 (en) * 1994-03-01 2001-05-29 Siegfried Dornhofer Roller-type skiing device for negotiating a slope
DE4424372A1 (en) * 1994-07-11 1996-01-18 Horst Kraus Ski roller
US5707068A (en) * 1995-11-21 1998-01-13 Bradfield; Athol George In-line skateboard
US5826895A (en) * 1995-11-21 1998-10-27 Bradfield; Athol George In-line skateboard
US6059303A (en) * 1995-11-21 2000-05-09 Bradfield; Athol George In-line skateboard
USD413954S (en) * 1998-02-27 1999-09-14 Carve Board Sports, Inc. Skateboard
US6688613B1 (en) 1998-10-19 2004-02-10 John C. Malloy Roller skating device
US6375204B1 (en) * 2001-01-22 2002-04-23 Wen-Wu Tu Pitching skate board
WO2004062550A1 (en) * 2003-01-09 2004-07-29 Philip Raymond Hankin Exerciser
US20060186617A1 (en) * 2003-07-11 2006-08-24 Ryan Farrelly Personal transportation device for supporting a user's foot having multiple transportation attachments
US7059613B2 (en) * 2003-07-11 2006-06-13 Freeline Skates Inc. Personal transportation device for supporting a user's foot having multiple transportation attachments
US20050006859A1 (en) * 2003-07-11 2005-01-13 Ryan Farrelly Personal transportation device for supporting a user's foot having multiple transportation attachments
US20100176565A1 (en) * 2003-07-11 2010-07-15 Freeline Sports, Inc. Personal transportation device for supporting a user's foot having multiple transportation attachments
US8308171B2 (en) 2003-07-11 2012-11-13 Ryan Farrelly Personal transportation device for supporting a user's foot having multiple transportation attachments
US20090174163A1 (en) * 2008-01-08 2009-07-09 Freeline Sports, Inc. Personal transportation device for supporting a user's foot
US20100090423A1 (en) * 2008-05-13 2010-04-15 Freeline Sports, Inc. Personal transportation device for supporting a user's foot
US20100092806A1 (en) * 2008-10-14 2010-04-15 Honeywell International Inc. Miniature powered antenna for wireless communications and related system and method
US20140345178A1 (en) * 2010-10-05 2014-11-27 Brian Lewis Interchangeable graphic display system and method of making same
US9084927B2 (en) * 2010-10-05 2015-07-21 Brian Lewis Interchangeable graphic display system and method of making same
US20140066265A1 (en) * 2012-09-05 2014-03-06 Bryan P. Oliver Ski training device and method
US9050517B2 (en) * 2012-09-05 2015-06-09 Bryan P. Oliver Ski training device and method
US10220293B2 (en) * 2016-03-09 2019-03-05 Lyle J. Noorlun Skateboard safety brake

Similar Documents

Publication Publication Date Title
US3622172A (en) Torsion land skier
US4106786A (en) Recreational vehicle for use on sloping terrains
US4138128A (en) Ski board
US5195781A (en) Grass ski roller boards
US4161323A (en) Snow ski board apparatus
US7175187B2 (en) Wheeled skate with step-in binding and brakes
US5443278A (en) Snowmobile ski liner
US5931480A (en) Footgear suspension device
US4043566A (en) Skateboard
US5997018A (en) All terrain sport board and steering mechanisms for same
US4382605A (en) Tilt steering of tandem wheeled or runner equipped vehicle
US3374003A (en) Snow ski board
US4134598A (en) Land skis
US3671055A (en) Coaster vehicle
US4394028A (en) Skate
US3332697A (en) Snow board
US7121561B2 (en) Roller skate and wheel trucks therefor
US4930796A (en) Riding vehicle
US1801230A (en) Roller skate
US4235448A (en) Skiing simulator
US4304417A (en) Adjustable plastic roller skate
US20050280224A1 (en) Anti-dart snowmobile ski
US4744584A (en) Handlebars for tucked-in skiing
US20040036257A1 (en) Snow board brake
US4606548A (en) Ski scooter