US3774732A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sprocket-actuated bicycle brake
Assignee: RALEIGH IND
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Filing: 1972-04-25
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Granted: 1973-11-27
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Expires: 1992-04-25
Abstract
Abstract A forwardly and rearwardly movable brake member is pivoted to a bicycle frame and includes a brake shoe portion which frictionally engages the rear wheel when the brake member is moved rearwardly. An elongated pawl is pivoted to the brake member and extends forwardly to engage the teeth of a pedalactuated sprocket which is drivingly connected to the rear wheel. During forward motion the pawl skips over the sprocket teeth, but when the sprocket rotation is reversed, the pawl moves the brake member rearwardly to frictionally engage the brake shoe portion with the rear wheel.
Inventors
- 👤 C Basek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:31
CPC Classifications
B; B62; B62L; B62L5/00; B62L5/003; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2164
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
179 words
In a bicycle including a frame, a rear wheel and a pedalactuated sprocket drivingly connected to said rear wheel, a sprocket-actuated rear wheel brake comprising in combination, a brake member which is substantially U-shaped and includes a pair of transversely spaced arms and a connecting bight portion which constitutes a brake shoe portion, said spaced arms being pivotally connected to said frame at a point generally between said sprocket and said rear wheel, said brake member being pivotally movable forwardly and rearwardly about said pivot connection such that said brake shoe portion is frictionally engageable with the rear wheel when the brake member is moved rearwardly, and an elongated pawl pivoted to said brake member and extending forwardly therefrom, the front end of said pawl engaging the teeth of said sprocket so that when the sprocket is rotated to drive the rear wheel forwardly, the pawl skips over the sprocket teeth but when the sprocket is rotated in the reverse direction, the pawl moves the brake member rearwardly to frictionally engage said brake shoe portion with the rear wheel.
Claim 2
Dependent Claim
179 words
In a bicycle including a frame, a rear wheel and a pedalactuated sprocket drivingly connected to said rear wheel, a sprocket-actuated rear wheel brake comprising in combination, a brake member which is substantially U-shaped and includes a pair of transversely spaced arms and a connecting bight portion which constitutes a brake shoe portion, said spaced arms being pivotally connected to said frame at a point generally between said sprocket and said rear wheel, said brake member being pivotally movable forwardly and rearwardly about said pivot connection such that said brake shoe portion is frictionally engageable with the rear wheel when the brake member is moved rearwardly, and an elongated pawl pivoted to said brake member and extending forwardly therefrom, the front end of said pawl engaging the teeth of said sprocket so that when the sprocket is rotated to drive the rear wheel forwardly, the pawl skips over the sprocket teeth but when the sprocket is rotated in the reverse direction, the pawl moves the brake member rearwardly to frictionally engage said brake shoe portion with the rear wheel.
Claim 3
Dependent Claim
29 words
The combination as defined in claim 1 together with stop means provided on said brake member and engageable with said frame to limit forward movement of the brake member.
Claim 4
Dependent Claim
32 words
The combination as defined in claim 1, said pawl being pivoted to one of said arms, together with a mounting bracket secured to said frame and having said arms pivotally connected thereto.
Claim 5
Dependent Claim
36 words
The combination as defined in claim 1 wherein at least the front end portion of said pawl is of an inverted U-shaped cross-section and defines a channel in which the teeth of said sprocket are received.
Claim 6
Dependent Claim
170 words
A brake attachment for a bicycle which includes a frame, a rear wheel and a pedal-actuated sprocket drivingly connected to the rear wheel, said brake attachment comprising a brake member which is substantially U-shaped and includes a pair of transversely spaced arms and a connecting bight portion which constitutes a brake shoe portion, said spaced arms adapted to be pivotally connected to a bicycle frame for forward and rearward movement about said pivot connection, said brake shoe portion adapted to frictionally engage a rear wheel when the brake member is moved rearwardly, and an elongated pawl pivoted to said brake member and extending forwardly therefrom, the front end of said pawl being adapted to engage the teeth of a pedal-actuated sprocket so that when the sprocket is rotated to drive the rear wheel forwardly, the pawl skips over the sprocket teeth but when the sprocket is rotated in the reverse direction, the pawl moves the brake member rearwardly for frictional engagement of said brake shoe portion with the rear wheel.
Claim 7
Dependent Claim
170 words
A brake attachment for a bicycle which includes a frame, a rear wheel and a pedal-actuated sprocket drivingly connected to the rear wheel, said brake attachment comprising a brake member which is substantially U-shaped and includes a pair of transversely spaced arms and a connecting bight portion which constitutes a brake shoe portion, said spaced arms adapted to be pivotally connected to a bicycle frame for forward and rearward movement about said pivot connection, said brake shoe portion adapted to frictionally engage a rear wheel when the brake member is moved rearwardly, and an elongated pawl pivoted to said brake member and extending forwardly therefrom, the front end of said pawl being adapted to engage the teeth of a pedal-actuated sprocket so that when the sprocket is rotated to drive the rear wheel forwardly, the pawl skips over the sprocket teeth but when the sprocket is rotated in the reverse direction, the pawl moves the brake member rearwardly for frictional engagement of said brake shoe portion with the rear wheel.
Claim 8
Dependent Claim
31 words
The brake attachment as defined in claim 5 together with stop means provided on said brake member and adapted to engage the frame to limit forward movement of the brake member.
Claim 9
Dependent Claim
36 words
The brake attachment as defined in claim 5, said pawl being pivoted to one of said arms, together with a mounting bracket adapted to be secured to the frame and having said arms pivotally connected thereto.
Claim 10
Dependent Claim
31 words
The brake attachment as defined in claim 5 wherein at least the front end portion of said pawl is of an inverted U-shaped cross-section and defines a sprocket tooth receiving channel.
References Cited (Backward Citations)
FR1022084A
Cited
GB691582A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-26 | 1977-05-28 | 1977-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-26 | 1981-05-28 | 1981-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-26 | 1985-05-28 | 1985-11-27 | $7700.00 | Window Closed / Lapsed |