US 3180651 A
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Description (OCR text may contain errors)
A ril 27, 1965 e. K. WARE 8 Ton STOP STRUCTURE FOR ROLLER SKATE Filed Aug. 27, 1962 INVENTOR.
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United States Patent 3 180 651 TOE STGP STRUCTC RE FOR RGLLER dKATE Gordon K. Ware, Chicago, Ill., assignor to The Chicago Roller Skate Company, Chicago, Ill., a corporation of Illinois Filed Aug. 27, 1962, Ser. No. 219,637 Claims. (Cl. 280--11.2)
The present invention relates to a novel toe stop structure for roller skates.
Toe stop structures have heretofore been proposed which include a stop member formed from rubber or rubber-like material and a support therefor, which support may be formed integrally with a sole plate of a roller skate or provided as a separate element or bracket. The
toe stop member has usually been connected with the support means or bracket by a screw element. While certain heretofore proposed toe stop structures have functioned generally satisfactorily, it has been found that when a skater engages the toe stop member against the floor, there is frequently a tendency of the toe stop member to rotate about its axis in a manner which may cause loosening of the screw and thus loosening of the toe stop member. a I
It is an important object of the present invention to provide a novel toe stop structure of the above-described type which is constructed so as substantially to preclude unauthorized or accidental loosening of the toe stop member.
A further object of the present invention is to provide a novel toe stop structure which minimizes any possibility of loosening of the toe stop member and which is of simple, economical and reliable construction.
Other objects and advantages of the present invention will become apparent from the following description wherein:
FIG. 1 is a side elevational view showing a skate incorporating a toe stop structure constructed in accordance with features of the present invention;
FIG. 2 is an enlarged fragmentary sectional view showing a toe stop structure incorporating features of the present invention;
FIG. 3 is aperspective view showing a toe stop member constructed in accordance with the present invention;
FIG. 4 is a sectional view taken along line 44 in FIG. 2;
FIG. 5 is an enlarged fragmentary and exploded sectional view showing mating portions of a toe stop member anda toe stop support element in spaced apart relationship; and I FIG. 6 is a sectional view similar to FIG. 5 but shows the parts in fully assembled relationship.
Referring now more specifically to the drawings wherein like parts are designated by the same numerals throughout the various figures, roller skate 10 incorporating features of the present invention is shown in FIG. 1. The skate 10 comprises a sole plate 12 and front and rear wheel truck assemblies 14 and 16 which are constructed and connected with the sole plate in a known manner. A toe stop construction 18 incorporating features of the present invention is disposed at the forward end of the sole plate.
The toe stop construction 18 comprises a stop member 20 preferably molded from a rubber or rubber-like friction material. The toe stop member has a substantially flat upper end or face 22 and a lower end or face 24 which preferably has a rounded marginal edge 26. In order ot secure the toe stop member with respect to the support therefor, which is described in detail below, a
' screw element 28 in provided. The screw element has a threaded shank portion 30 which extends through a bore 3,188,651 Patented Apr. 27, 1965 32 in the toe stop member. The toe stop member is provided with an enlarged counterbore 34 for accommodating a head portion 36 of the screw member.
The toe stop construction further includes a mounting or supporting element 38 for supporting the stop member 20. In the embodiment shown, the support element 38 is in the form of a boss integral with the sole plate 12. However, it is to be understood that the support element 38 could be provided in the form of a separate bracket secured to the sole plate or connected with the front wheel truck 14.
The support element is constructed so as to present a forwardly and downwardly facing surface 40 adapted to overlie the upper end or surface 22 of the stop member 20. The surface 40 has a peripheral configuration similar to the configuration of the stop member surface 22, which, in the embodiment shown, is substantially circular. However, as shown in FIG. 2, the diameter of the surface 40 is substantially lessthan the diameter of the stop member. 7
The stop member is provided with a central internally threaded aperture means 42 for threadedly receiving the screw shank 30. In the embodiment shown, the aperture means 42 is in an insert 44, which has external threads cooperable with an internally threaded aperture 46 integral with the support element 38. With this arrangement, toe stop members 20 of different sizes and having. different sizes of securing screws assembled therewith may be connected with the support element 38 by selectively removing or replacing the insert 44. This, of course, changes the effective size of the aperture means within the support element, so that the aperture means is adaptable for accommodating securing screws of different sizes. v
As will be understood, when a skaterengages the toe stop member 20 against the floor for accomplishing a braking action, a substantial torque may be applied tothe toe stop member 20 tending to rotate the toe stop member about the screw 28. The direction of such rotation will, of course, depend on the particular. portion of the toe stop member which is engaged against the floor, but it frequentlyhappens that the direction of such rotation will cause loosening of the screw member.
In order to prevent'rotation of the. stop member 20 relative to the support element 38, means are provided for interlocking these parts with respect to each other. More specifically, as shown in FIGS. 2, 3, 5 and 6, the
stop member 20 has a plurality of grooves 48.formed therein and spaced around the surface 22. The grooves 48 extend substantially radially from the screw 28 toward the periphery of the toe stop member. However, it is to be noted that the grooves terminate short of the periphery of the toe stop member whereby the toe stop member has a peripherally continuous edge 50. As shown in FIG. 5, each of the grooves 48 is formed so that it has a substantially triangular cross sectional configuration and so that opposite sides 52 and 54 thereof are inclined substantially equally from the surface 22.
The support element 38 has a plurality of ribs 56 formed integrally therewith. The ribs 56 extend generally radially of the surface 40 and project from the surface 40 for cooperative engagement with the grooves 48 in the toe stop member 20. As shown best in FIGS. 5 and 6, each of the ribs 56 has a first side 58 extending generally perpendicularly from the surface 40', and a second side 60 which is inclined at an acute angle with respect to the surface 40 toward the side 58. A rounded outer end 62 joins the sides 58 and 60.
When the stop member 20 is assembled with the sup port element 38, the stop member is first positioned so that its grooves 48 are in alignment with the ribs 56. Then the screw member 28 is turned by means of a suitable tool, not shown, for drawing the stop member 20 against the support element 38. This action causes the ribs to be forced into the grooves as shown best in FIG. 6. It is particularly tobe noted that while the surface 60 of each rib is inclined at an angle similar to the inclination of an opposing surface of an associated groove 48, the non-symmetrical cross section of the rib created by the angular position of the surface 58 provides the outer end portion 62 of the rib with an effective thickness or transverse cross section greater than the width of the narrow bottom portion of an associated V-shaped groove. Thus, when a rib is forced into a groove as shown in FIG. 6, wall portions of the groove are deformed, thus allowing intimate and interlocking contact with the rib.
It is further to be noted that the effective height of each rib is greater than the effective depth of its associated groove whereby the surface 22 will be spaced from I the surface 40 even after the screw member .28 has been fully tightened as shown in FIG. 6. This provides assuri ance that the entire clamping pressure will be applied between the inter-engaging surfaces of the ribs and the grooves whereby to minimize any possibility of slippage between; the grooves and the ribs as a result of the compressibility of the rubber or rubber-like stop member.
While a preferred embodiment of the present invention has been shown and described herein, it is obvious that many details may be changed without departing from the. spirit and scope of the appended claims.
This invention is claimed as follows:
1. In a roller skate construction, a toe. stop structure comprising a support element presenting a forwardly and downwardly facing generally circular surface having a threaded aperture means therein, a plurality of spaced d for supporting the stop member with the face thereof spaced from the surface of said support element.
2. Atoe stop structure, as defined in claim 1, wherein each of said ribs includes opposite side surfaces inclined at different amounts with respect to said, surface for promoting wedging of the ribs into said groove means.
- 3. Atoe. stop structure, as defined inclaim 1, wherein said stop member comprises a continuous and uninterrupted peripheral edge portion'surrounding and closing radially outer ends of said groove means and partially covering radially outer ends of said ribs.
4. A toe stop structure for a roller skate comprising a Y support element for presenting a forwardly and downribs onsaid element, said ribs extending generally radially of said aperture means and projecting from said surface, said ribs extending substantially straight from immediately adjacent said aperture means continuously substantially toa peripheral edge of said surface, a stop member having a face disposed in opposing relationship to said engaging with said ribs :for positive locking of said stop member against rotation relative to said support element,-
the length of said groove means and said ribs being sub stantially greater than transverse dimensions of the ribs 7 and groove means,'and the thickness of the outer end portions of the ribs being greater than the width of the:
bottom portions of associated groovesmeans whereby the sides of the ribs engage the sides of the groove means wardlyfacing surface having a predetermined diameter, said element having; generally centrally located internally threaded a-perture means therein, a plurality ofannularly spaced ribs integral with said element, said ribs extending generally radially of said aperture means and from immediately adjacent said aperture means substantially straight to immediately adjacent a peripheral edge of said surface, said ribs having a predetermined height and projecting from said surface of said element, a stop member of resilient material having a face disposed in opposing and slightly axially spaced relationsbipwith respect to said surface, a screw element connected with said stop member and threaded intosaid aperture means, and a plurality of generally radially extending groove means having a generally V-shaped transverse cross section in said stop member face, receiving and interengaging with said ribs for locking said stop member against rotation relative to said support element, said groovemeans havingsubstantially straigbt-flat side surfacesmerging along a narrow apex and said ribs including substantially straight fiat opposite side surfaces joined by blunt rounded o'uterend marginswhi'ch engage the side surfaces of said groove means above said narrow apex.- in wedging contact for supporting the stop member with the face thereof spaced from the surface of said support element.
References-Cited by the Examiner UNITED STATES PATENTS 2,595,751 5/52 Balstad 2s0 11.2 X 2,706,641 4/55 Van Horn 280-11.2 2,719,723 10/55 j Ware zen-11.2 3,003,776 10/61 Ware s r 28041.2 3,035,846 5/62 Asad s 28011.2
PHILIP'ARNOLD, Primary Examiner. i i
A. HARRY LEVY, Examinen.