A clipless bicycle pedal employing a clamping mechanism which engages a binding plate on the bottom of a rider's shoe. The clamping mechanism includes two units which pivot about the same axis to engage the binding plate and which may share a biasing mechanism. The pivot axis maybe the same axis as the pedal shaft. The overall structure of the preferred embodiment provides a clipless pedal which is lightweight and easy to assembly and maintain.
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28. A bicycle pedal for use with a separate binding plate on a rider's shoe, comprising:
binding plate engaging means for engaging said binding plate at one of two or more positions; and
binding plate clamping means for engaging said binding plate at said one of two or more positions in combination with said plate engaging means such that said binding plate clamping and engaging means cooperatively hold said plate;
wherein said binding plate engaging means and said binding plate clamping means are configured so as to rotate relative to each other about a common axis but in opposite angular directions during said engaging of said binding plate.
10. A bicycle pedal assembly for use with a bicycle and a separate binding plate on a shoe, comprising:
pedal shaft;
a binding mechanism including an inner mounting block having a first opening receiving the pedal shaft, a biasing spring, a separate central mounting block having a second opening receiving the pedal shaft, and a separate outer mounting block having a third opening receiving the pedal shaft; and
a clamping mechanism including a clamp member mounted to said inner and outer mounting blocks and an engaging member mounted to said central mounting block for clamping to the binding plate;
wherein said clamp member and said engaging member cooperate to hold said binding plate in place.
14. A bicycle pedal for use with a separate binding plate on a rider's shoe, comprising:
binding plate engaging means for engaging said binding plate at least one position, said binding plate engaging means configured to pivot about an axis of a pedal shaft; and
binding plate clamping means for engaging said binding plate at said at least one position in combination with said plate engaging means, said binding plate clamping means configured to pivot relative to said binding plate engaging means about said axis of said pedal shaft;
wherein said plate engaging means and said plate clamping means pivot relative to each other in opposite angular directions about said axis of said pedal shaft to hold said binding plate in place.
6. A bicycle pedal for use with a separate binding plate on a shoe, said pedal comprising:
a first pedal portion having an axis of rotation, and having first and second plate engaging members on opposite sides of said axis; and
a second pedal portion mounted so as to move, relative to said first pedal portion and independently thereof, about said axis of rotation in response to insertion of said binding plate between said first pedal portion and second pedal portion, said second pedal portion having first and second plate clamping members on opposite sides of said axis which move together in response to said insertion of said binding plate;
wherein one of said first and second plate engaging members and one of said first and second plate clamping members cooperate to hold said binding plate in place.
24. A crank arm assembly adapted for engagement and disengagement of a separate binding plate on a rider's shoe, said crank arm assembly comprising:
binding plate engaging means for engaging said binding plate at least one position, said binding plate engaging means configured to pivot about an axis;
binding plate clamping means for engaging said binding plate at said position in combination with said plate engaging means, said binding plate clamping means configured to pivot about said axis;
common biasing means for biasing said plate engaging means relative to said plate clamping means about said common axis such that said binding plate clamping and engaging means are biased toward each other about said common axis to cooperatively hold said plate in place; and
a crank arm assembly rotatably supporting said binding plate engaging means and said binding plate clamping means about said axis.
2. A bicycle pedal adapted for rotatable mounting to a bicycle pedal shaft and for use with a separate binding plate on a rider's shoe, said bicycle pedal comprising:
binding plate engaging means for engaging said binding plate at one of first and second positions, said binding plate engaging means having an opening to receive the pedal shaft and having first and second plate engaging members configured on opposite sides of said opening;
binding plate clamping means for cooperating with said binding plate engaging means to engage said binding plate, said binding plate clamping means having first and second plate clamping members configured at said first and second positions, respectively spaced apart from said first and second plate engaging members; and
biasing means for biasing said plate clamping members and said engaging members, wherein said biasing means comprises a helical spring configured so as to receive the pedal shaft therethrough.
0. 54. A bicycle pedal adapted for a rotatable mounting to a bicycle pedal shaft and for use with a separate binding plate on a rider's shoe, said bicycle pedal comprising:
a binding plate engaging hook having an axis of rotation about said pedal shaft for engaging said binding plate in at least two positions, a first position and a second position, said engaging hook having a portion connected to an opening to receive the pedal shaft and having first and second plate engaging members configured on opposite sides of said axis;
a binding plate clamping hook for cooperating with said engaging hook to engage said binding plate, said clamping hook having first and second plate clamping members configured at said first and second positions, respectively spaced apart from said first and second plate engaging members; and
a helical spring for biasing said plate clamping members and said plate engaging members, wherein said helical spring configured so as to receive the pedal shaft therethrough.
1. A bicycle pedal adapted for rotatable mounting to a bicycle pedal shaft and for use with a separate binding plate on a rider's shoe, said bicycle pedal comprising:
binding plate engaging means for engaging said binding plate, said binding plate engaging means having an opening to receive the pedal shaft and having first and second plate engaging members coupled so as to rotate together in response to insertion of said binding plate and;
binding plate clamping means for clamping said binding plate, said binding plate clamping means having first and second plate clamping members, coupled to rotate together and respectively spaced apart from said first and second plate engaging members so as to simultaneously rotate relative to both said first and second plate engaging members in an opposite angular direction therefrom in response to insertion of said binding plate; and
biasing means for biasing said plate clamping members and said engaging members such that said first plate clamping member and said first plate engaging member cooperatively hold said binding plate in place at a first position and said second plate clamping member and said second plate engaging member cooperatively hold said binding plate at a second position.
0. 48. A bicycle pedal adapted for rotatable mounting to a bicycle pedal shaft and for use with a separate binding plate on a rider's shoe, said bicycle pedal configured to engage said binding plate in at least two positions, a first position and a second position, comprising:
an engagement assembly comprising: an opening to receive the pedal shaft and engaging hooks including a first engaging hook and a second engaging hook coupled so as to rotate together in response to insertion of said binding plate;
a clamp assembly mounted so as to move, relative to said engagement assembly and independently thereof, in response to insertion of said binding plate, said clamp assembly comprising: clamping hooks including a first clamping hook and a second clamping hook coupled to rotate together and respectively spaced apart from said first and second engaging hooks so as to simultaneously rotate relative to both said first and second engaging hooks in an opposite angular direction therefrom in response to insertion of said binding plate; and
a helical spring for biasing said clamping hooks and said engaging hooks such that said first clamping hook and said first engaging hook cooperatively hold said binding plate in place at said first position and said second clamping hook and said second engaging hook cooperatively hold said binding plate at said second position, wherein said helical spring is configured to receive the pedal shaft therethrough.
0. 44. A bicycle pedal for releasibly engaging a cleat affixed to the bottom of a shoe, said pedal comprising:
a spindle with one end adapted for attachment to a bicycle crank arm;
a first housing, a second housing, and a third housing, each housing having an opening for receiving said spindle, wherein said second housing is separate from and between said first and third housings, said second housing mounted so as to move, relative to said first housing and independently thereof, about the axis of said spindle in response to insertion of said cleat; and
a spring loaded latch mechanism that pivots concentrically with the axis of said spindle, wherein said latch mechanism comprises:
hooked members for receiving said cleat including first and second engaging members connected to a portion of said second housing which are coupled to rotate together in an opposite angular direction from first and second clamping members in response to the insertion of said cleat, said first and second clamping members spaced apart from said first and second engaging members and connected to a portion of one of said first and third housings, wherein one of said first and second engaging members and one of said first and second clamping members form an adjacent pair of hooked members; and
a spring that holds said hooked members apart from each other at substantially equal angles of spacing;
wherein said spring loaded latch mechanism allows engagement with said cleat between said adjacent pair of hooked members.
0. 40. A bicycle pedal for releasibly engaging a cleat affixed to the bottom of a shoe, said pedal comprising:
a spindle with one end adapted for attachment to a bicycle crank arm;
a first housing and a second housing that rotates about said spindle, each housing separate from the other and having an opening for receiving said spindle, wherein said second housing mounted so as to move, relative to said first housing and independently thereof, in response to insertion of said cleat; and
a spring loaded latch mechanism that pivots concentrically with the axis of said spindle, wherein said latch mechanism comprises:
a first pair of hooked members and a second pair of hooked members, wherein the hooked members of each of said first and second pairs of hooked members are on opposite sides of the axis of said spindle, wherein said first pair of hooked members is connected to a portion of said first housing and said second pair of hooked members is connected to a portion of said second housing, said second pair of hooked members having hooked members coupled to simultaneously pivot together with respect to said first pair of hooked members in an opposite angular direction therefrom in response to the insertion of said cleat; and
a helical spring configured to receive the spindle therethrough and hold the hooked members of said first and second pairs of hooked members apart from each other at substantially equal angles of spacing;
wherein said spring loaded latch mechanism allows engagement with said cleat
between one hooked member of said first pair of hooked members and one hooked member of said second pair of hooked members.
3. A bicycle pedal as set out in
4. A bicycle pedal as set out in
5. A bicycle pedal as set out in
7. A bicycle pedal as set out in
8. A bicycle pedal as set out in
9. A bicycle pedal as set out in
11. The pedal assembly of
12. The pedal assembly of
13. The pedal assembly of
15. The bicycle pedal of
16. The bicycle pedal of
17. The bicycle pedal of
18. The bicycle pedal of
19. The bicycle pedal of
20. The bicycle pedal of
21. The bicycle pedal of
22. The bicycle pedal of
23. The bicycle pedal of
25. The bicycle pedal of
29. The bicycle pedal of
30. The bicycle pedal of
31. The bicycle pedal of
32. The bicycle pedal of
33. The bicycle pedal of
34. The bicycle pedal of
35. The bicycle pedal of
36. The bicycle pedal of
37. The bicycle pedal of
38. The bicycle pedal of
39. The bicycle pedal of
0. 41. The bicycle pedal according to claim 40 wherein said first housing rotates about said spindle on at least one bearing.
0. 42. The bicycle pedal according to claim 40, wherein said pedal defines four separate cleat engagement positions.
0. 43. The bicycle pedal according to claim 42, wherein said pedal has only one spring.
0. 45. The bicycle pedal according to claim 44, wherein the pedal defines four separate cleat engagement positions.
0. 46. The bicycle pedal according to claim 44, wherein the spring of the pedal includes a spring having a coil axis that is substantially coincident with the axis of said spindle.
0. 47. The bicycle pedal according to claim 44, wherein said adjacent pair of hooked members are connected to a portion of said first and third housings.
0. 49. The bicycle pedal according to claim 48, wherein said pedal defines four separate cleat engagement positions.
0. 50. The bicycle pedal according to claim 48, wherein said engagement assembly having an axis of rotation, and having said first engaging hook and said second engaging hook on opposite sides of said axis.
0. 51. The bicycle pedal according to claim 50, wherein said clamping hooks are mounted so as to move, relative to said engaging hooks and independently thereof, about said axis of rotation in response to insertion of said binding plate between one of said clamping hooks and one of said engaging hooks.
0. 52. The bicycle pedal according to claim 51, wherein said first clamping hook and said second clamping hook are connected to a first housing having an opening receiving said pedal shaft.
0. 53. The bicycle pedal according to claim 52, wherein said clamping hook having an axis of rotation, said first clamping hook and said second clamping hook on opposite sides of said axis.
0. 55. The bicycle pedal according to claim 54, wherein said pedal defines four separate cleat engagement positions.
0. 56. The bicycle pedal according to claim 54, wherein said first and second engaging members are configured to rotate relative to said first and second clamping members in an opposite angular direction therefrom in response to insertion of said binding plate.
0. 57. The bicycle pedal according to claim 56, wherein said first and second clamping members are mounted so as to move, relative to said first and second engaging members and independently thereof, about said axis of rotation in response to insertion of said binding plate between one of said first and second clamping members and one of said first and second engaging members.
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This application is a continuation of Ser. No. 08/044,837 filed Apr. 8, 1993 now abandoned.
1. Field of the Invention
The present invention is directed to bicycle pedals and components. More particularly, the present invention is directed to bicycle pedals incorporating binding mechanisms which are used with binding plates on a shoe worn by a rider.
2. Description of the Related Art
In order to hold a rider's shoe in position on a bicycle pedal, bicycle pedals including toe-clips are employed to grasp the front portion of each of the rider's shoes. The toe-clips in conjunction with pedals and straps allow both downward and upward motion to be transmitted as drive force, however, toe-clips have the disadvantage that they do not provide for easy disengagement in the event of a fall. Thus, clipless pedals have been developed to overcome the disadvantages of pedals having toe-clips.
Clipless bicycle pedals use a binding mechanism on the pedal to engage a plate on a rider's shoe to hold the shoe in position on the pedal. The binding mechanism prevents the shoe from slipping off the pedal, while also providing for easy disengagement when stopping or in the event of a fall. Clipless pedals may also provide a positive pedaling force during both the upward and downward motions of the pedal. Conventional clipless pedals generally include a pedal body having a binding mechanism mounted thereon to engage said plate. The pedal body is, in turn, rotatably mounted on a pedal shaft. The binding mechanism includes a retaining claw fixedly mounted to said pedal body and a movable claw movably mounted to said pedal body and a spring which urges the movable claw toward the plate fixed to the bottom of the rider's shoe. The binding mechanism and said plate are designed to cooperate with each other so that a horizontal twisting or sliding movement of said plate produces a movement of the movable claw, permitting disengagement of said plate.
Due to the incorporation of the binding mechanism on the pedal body, however, conventional clipless pedals require a pedal body which is bulky and mechanically complicated. This makes their assembly and cleaning difficult and time consuming. Moreover, conventional clipless pedals have a relatively large number of components which increases their weight and cost.
Accordingly, there is a need for a clipless bicycle pedal which is lightweight, mechanically simple and relatively inexpensive.
The present invention provides a clipless bicycle pedal having a simplified structure which is lightweight and offers ease of assembly, and which further allows for easy disassembly during cleaning or maintenance.
The clipless pedal of the present invention includes a binding mechanism with one or more mounting positions, each having a clamping member and an engaging member. The binding mechanism engages a binding plate which is fixed to the sole of a rider's shoe, at one of the mounting positions depending on the pedal orientation at the time of the engagement. A biasing mechanism is integrated with the binding mechanism and biases the clamping member and the engaging member in such a way that the binding plate is secured to the binding mechanism at one of the mounting positions. The integrated biasing and binding structure of the preferred embodiment provides a clipless pedal without a bulky pedal body and which is easy to assemble and maintain.
In a preferred embodiment, the biasing mechanism includes a single helical biasing spring which is axially mounted over the pedal shaft to operate the binding mechanism. An adjustment screw is provided which adjusts the tension of the biasing spring thereby adjusting the binding strength of the binding mechanism. In the preferred embodiment, the components of the binding mechanism include an inner mounting block having a cylindrical cavity, a central block having a cylindrical cavity and an outer mounting block having a cylindrical cavity. In addition, the binding mechanism includes first and second clamping members and corresponding first and second engaging members.
The inner, central and outer mounting blocks are rotatably mounted to the pedal shaft which is received through the cylindrical cavities. The helical biasing spring is axially mounted over the shaft. One end of the helical biasing spring is coupled to the inner block while the other end is coupled to the central block. The first and second clamping members are attached to both the inner and outer mounting blocks so as to hold the inner and outer mounting blocks together, forming a plate clamping unit, and to move therewith about the longitudinal axis of the pedal shaft. The first and second engaging members are mounted to opposite sides of the central block, so as to form a plate engaging unit, which also rotates about the axis of the pedal shaft. The biasing spring biases the plate clamping unit and the plate engaging unit rotationally about the pedal shaft axis so as to provide a clamping action to engage the binding plate mounted on the bottom of the shoe.
Further features and advantages of the present invention will be appreciated by a review of the following detailed description of the preferred embodiments taken in conjunction with the following drawings.
In
In
Referring now to
It should be appreciated that the specific pieces cooperating to form the binding mechanism illustrated in
Furthermore, the manner of coupling the various pieces illustrated in
Similarly, while the plate clamping unit is illustrated configured as several separate pieces, it may be formed as one integral piece, or two or more portions, may be used. Similarly, a single mounting block may be employed as in the case of the plate engaging unit as illustrated in
Continuing with the embodiment illustrated in
A number of alternate mounting approaches may equally be employed while providing the desired rotational freedom. For example, pedal shaft 12 may be made of two or more cooperating portions in which one portion is fixedly attached to crank arm 102, and the other cooperating portion(s) are rotatably mounted to the first portion. One of the plate engaging unit or plate clamping unit may then be directly mounted to the rotating portions. Alternatively, one of the plate engaging unit or plate clamping unit may be integrally formed with a rotating portion of the pedal shaft.
Alternatively, one portion of the plate engaging unit or plate clamping unit may be rotatably mounted to a portion of the other unit. The other unit is then mounted to the pedal shaft 12 in a fixed manner for a rotatable pedal shaft portion, or is rotatably mounted onto or into a pedal shaft portion which is itself fixedly attached to the bicycle crank arm. The axis of rotation of the plate clamping unit or plate engaging unit rotatably mounted to the other unit may or may not share the same longitudinal axis as the pedal shaft. Furthermore, at least two binding positions in an angular direction about such axis of rotation of the rotatably mounted unit may be provided.
Additionally, the manner in which the mounting of the various portions provides rotational freedom may be varied in numerous ways by employing well known bearing types and combinations. For example, bearing means 56 may be press-fitted into each of inner mounting block 14 and outer mounting block 16, while central mounting block 18 may contain a press-fitted bushing which acts as a plain bearing. A needle bearing may also be employed at one or more of these positions on the plate engaging unit or other bearing types may be employed. The plate clamping unit may similarly contain any of the above described types of bearings, or other well known bearings, so that either of plate engaging unit or plate clamping unit may be mounted via a variety of bearing types to pedal shaft 12. Additionally, either of plate engaging unit or plate clamping unit may contain a cylindrical portion which serves as a rotatable mounting for the other unit, and the unit not containing the cylindrical portion may be mounted about the axes of pedal shaft 12 and the cylindrical portion. Finally, either or both of plate engaging unit or plate clamping unit may be rotatably mounted at one or both ends to pedal shaft 12, or to both pedal shaft 12 and a portion of the other unit. One or both of the units may be mounted in such a way that permits play in a direction parallel to the axis of the pedal shaft 12 either with respect to the pedal shaft or with respect to the other unit. This arrangement allows a binding plate engaged to the unit to also have some play.
Continuing with
Spring bushing 22 is held within a cylindrical cavity of inner mounting block 14. Spring bushing 22 has spring engaging slots 17, 19 and 21 which receive one end of biasing spring 20. One of the three slots 17, 19, 21 may be selected during assembly for a rough setting of the biasing spring force. The other end of biasing spring 20 engages opening 58 in central mounting block 18. A plurality of openings for receiving one end of biasing spring 20 may be provided in central mounting block 18 also for a rough setting of the biasing spring force. Biasing spring 20 is thus mounted between spring bushing 22 and central mounting block 18. Spring bushing 22 includes a flattened portion which interacts with a biasing spring adjustment screw 32 for adjusting the rotational force (i.e. torque) required to rotate said plate engaging unit about the axis of the pedal shaft 12 with respect to said plate clamping unit. Biasing spring 20 provides the force needed to engage the binding mechanism to a binding plate fixed to the bottom of the rider's shoe as discussed below. Biasing spring 20 also provides the force which may be needed, depending upon the overall configuration, to keep the binding plate engaged to the binding mechanism.
A seal (not shown) to exclude moisture and dirt and/or to retain lubricants within the binding mechanism may be included at possible entry points to the binding mechanism, for example, between pedal shaft 12 and the plate engaging unit or plate clamping unit. A seal may also be provided on either or both of the plate engaging unit and plate clamping unit to retain lubricant and/or exclude dirt and water from these units individually. Alternatively, the seal may be configured between the plate engaging unit and plate clamping unit and at the inner and outer ends of the binding mechanism. The seal between the clamping and engaging unit may be configured to connect the plate engaging unit and plate clamping unit yet allowing independent rotation of each unit around the pedal shaft axis. It will be appreciated that any combination of these sealing arrangements which assures adequate containment of lubricant and/or exclusion of moisture and dirt may be employed.
Lubricant injection openings (not shown) may also be employed in inner mounting block 14, outer mounting block 16, and/or central mounting block 18. One or more gates may be provided for allowing injected lubricant, such as grease, to purge out from the gates to remove dust and other particles trapped between the lubricant injection openings and the gates. One or more routes may also be provided to allow the lubricant to pass between the plate engaging unit and plate clamping unit. The routes may also be closable so as to force lubricant only into the plate engaging unit or plate clamping unit to which the lubricant opening is provided. By selectively closing the routes between the units or the gates on some portions of the units, the routes may be combined to allow control of the lubricant to provide penetration through cither unit or to force lubricant out through the gates, thereby ensuring lubricant penetration to desired locations within the pedal.
In
Referring to
In another embodiment, an alternate biasing mechanism may be used in place of the helical spring. For example, an elastic material other than metal may be used in place of the helical spring, in either a compression or expansion configuration, to provide a relative biasing force between the plate engaging unit and the plate clamping unit. Alternatively, a portion of the engaging unit or clamping unit may be made of elastic material which is attached to or abuts against the other unit in a compression or expansion mode to provide the biasing force. Further, the biasing mechanism may be mounted outwardly on either the engaging or clamping member rather than being concealed within the binding mechanism. Such outwardly mounted biasing means may provide a biasing force either directly from one unit to the other or indirectly via a shoe, i.e., the biasing force acts from one unit to a shoe and reacts upon the other unit.
Alternatively, the biasing mechanism may be provided on the rider's shoe rather than being configured within the binding mechanism. For example, the biasing mechanism may be an elastic material or spring mounted outwardly on the bottom of the rider's shoe, so as to bias the units toward each other when the rider steps into the binding mechanism.
Continuing with
In another embodiment, clipless pedal 10 may have additional binding positions for engaging the binding plate. For example, clipless pedal 10 may have outer and inner binding positions which provide different locations for binding along the central axis of the pedal shaft or along an axis parallel to the axis of the shaft. For example, in the former case the binding mechanism 11 illustrated in
The clipless pedal of the present invention may also be combined with a conventional pedal platform, either employing a conventional toe clip or not, to allow convenient use with or without a specially adapted shoe. Such conventional pedal platform may be provided at any of various positions relative to the clipless pedal portion of the combined pedal. For example, the conventional and clipless pedal positions may be side-by-side in the direction of the pedal shaft, side-by-side but offset relative to the pedal shaft, or spaced apart in the length direction of the bicycle. Similarly, the clipless pedal of the present invention may also be combined with other types of plate binding mechanisms. For example, a movable claw and another biasing means may be mounted onto the outer mounting 16 to form an additional binding mechanism in conjunction with one of clamping member 38 or 40.
The operation of clipless pedal 10 in the preferred embodiment will now be discussed with reference to
Clipless pedal 10 may also have additional engaging and disengaging modes in which the functions of plate engaging unit and plate clamping unit are different from that described above. For example, the shape and configuration of the binding plate and engaging and clamping hooks may require that the binding plate be first engaged to plate clamping unit prior to engaging the plate engaging unit. Also, while disengagement occurs first at the rear of the binding plate, i.e. from the plate clamping unit in the illustrated embodiment of
As shown in
Referring to
Referring to
Note that the difference between
The foregoing description of the present invention is of a preferred embodiment which is subject to a number of modifications without departing from the spirit and scope of the invention. Accordingly, the foregoing description of the preferred embodiment should only be viewed as illustrative and limited only by the following claims.
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