US3860094A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-tightening brake for bicycles, motorcycles and the like
Assignee: Individual
•
Filing: 1973-12-17
•
Granted: 1975-01-14
•
Expires: 1993-12-17
Abstract
Abstract A bicycle or motorcycle brake has a pair of caliper arms each carrying a brake shoe assembly comprising a box-like casing open toward the wheel rim and a brake shoe slidable in this box. The box has a back wall which is inclined from a rear end wall toward a front end wall into the direction of displacement of the wheel adjacent the brake and the brake shoe is formed with a wedge wholly received between these end walls and two side walls parallel to the displacement direction. This wedge is formed with a planar sliding surface which engages the back wall of the box, and the wedge is substantially shorter than the box so that it can slide therein. A compression spring bears against the rear end wall and against the wedge to push this wedge toward the front end wall, and the wedge is formed on its ends with projections riding on the edges of the end walls so that the box is closed and the brake shoe is in good force-transmitting relationship with the box. A guide such as a rod tbrough the wedge and secured in the end walls or in the form of interfitting grooves and ridges on the sides of the wedge and the inside faces of the side walls guides the wedge in the box casing. The casing can comprise a metal core encased in a synthetic-resin mass.
Inventors
- 👤 Roger Breton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:54
CPC Classifications
B; B62; B62L; B62L1/00; B62L1/005; F; F16; F16D; F16D2127/00; F16D2127/08; F16D2127/10
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
255 words
A brake for arresting a surface displaceable in a predetermined direction past said brake, said brake comprising: a box casing having a generally planar back wall turned toward said surface, a pair of longitudinal parallel side walls extending from said back wall toward said surface and generally parallel to said direction, and a front end wall and a rear end wall each bridging said side walls and extending from said back wall, said end walls being parallel and spaced in said direction, said back wall being inclined into said direction at an acute angle from said rear end wall to said front end wall; means for displacing said casing toward and away from said surface generally perpendicularly to said direction; a brake shoe having a brake pad frictionally engageable with said surface and a holder carrying said pad and provided with a wedge wholly receivable between said side walls and between said end walls and having a generally planar face inclined to said direction and flatly engaging said back wall, said wedge having a longitudinal length in said direction less than the longitudinal length of said back wall in said direction between said end walls; means for securing said shoe longitudinally slidably in said casing, whereby on sliding of said shoe in said casing said pad moves generally perpendicularly to said direction; and a compression spring enclosed in said casing and having one end bearing on said rear end wall and another end bearing on said wedge to urge same toward said front end wall.
Claim 2
Dependent Claim
255 words
A brake for arresting a surface displaceable in a predetermined direction past said brake, said brake comprising: a box casing having a generally planar back wall turned toward said surface, a pair of longitudinal parallel side walls extending from said back wall toward said surface and generally parallel to said direction, and a front end wall and a rear end wall each bridging said side walls and extending from said back wall, said end walls being parallel and spaced in said direction, said back wall being inclined into said direction at an acute angle from said rear end wall to said front end wall; means for displacing said casing toward and away from said surface generally perpendicularly to said direction; a brake shoe having a brake pad frictionally engageable with said surface and a holder carrying said pad and provided with a wedge wholly receivable between said side walls and between said end walls and having a generally planar face inclined to said direction and flatly engaging said back wall, said wedge having a longitudinal length in said direction less than the longitudinal length of said back wall in said direction between said end walls; means for securing said shoe longitudinally slidably in said casing, whereby on sliding of said shoe in said casing said pad moves generally perpendicularly to said direction; and a compression spring enclosed in said casing and having one end bearing on said rear end wall and another end bearing on said wedge to urge same toward said front end wall.
Claim 3
Dependent Claim
18 words
The brake defined in claim 1 wherein said surface is on a wheel Rotatable adjacent said brake shoe.
Claim 4
Dependent Claim
46 words
The brake defined in claim 2 wherein said holder is provided with a longitudinal projection extending under the edge of at least one of said end walls turned toward said surface, said projection having a planar surface parallel to said back wall and engaging said edge.
Claim 5
Dependent Claim
55 words
The brake defined in claim 3 wherein said projection has a longitudinal length at least equal to the difference between said longitudinal lengths of said wedge and of said back wall, whereby said surface of said projection remains in contact with said edge over the entire travel of said brake shoe relative to said casing.
Claim 6
Dependent Claim
20 words
The brake defined in claim 4 wherein said holder is provided at both of its longitudinal ends with such projections.
Claim 7
Dependent Claim
40 words
The brake defined in claim 2 wherein said holder is formed with a recess of dovetail cross section and with an abutment adjacent said rear end wall, said brake shoe being snugly fitted into said recess and against said abutment.
Claim 8
Dependent Claim
47 words
The brake defined in claim 2 wherein said means for secuding said shoe includes a rod secured in said end walls of said casing and extending parallel to said side walls and to said back wall, said wedge being formed with a throughgoing hole receiving said rod.
Claim 9
Dependent Claim
75 words
The brake defined in claim 2 wherein at least one of said side walls has an inner guide surface engaging said wedge and said wedge has at least one outer guide surface engaging said inner guide surface, at least one of said guide surfaces being formed with a groove parallel to said back wall, said means for securing said shoe including a ridge formed on the other guide surface and slidably engaged in said groove.
Claim 10
Dependent Claim
39 words
The brake defined in claim 8 wherein said side walls are limitedly elastically deflectable toward and away from one another, whereby said holder can be forced in between said side walls for engagement of said ridge in said groove.
Claim 11
Dependent Claim
36 words
The brake defined in claim 9 wherein said holder includes a metal core extending along said back wall and into said end walls, and a synthetic resin mass surrounding said core and forming said side walls.
References Cited (Backward Citations)
US3727727A
Cited
US3664468A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-13 | 1978-07-15 | 1979-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-13 | 1982-07-15 | 1983-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-13 | 1986-07-15 | 1987-01-14 | $7700.00 | Window Closed / Lapsed |