US3927736A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disc brake for a bicycle and like vehicle
Assignee: ZF Friedrichshafen AG
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Filing: 1974-02-20
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Granted: 1975-12-23
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Expires: 1994-02-20
Abstract
Abstract The rear wheel of a bicycle carries a coaxial brake disc which rotates between two brake shoes when a support for the brake shoes is pivoted on the chain stays of the bicycle frame into its operating condition and secured to the wheel shaft. An actuating mechanism on the support is controlled by the rider of the bicycle to move the brake shoes axially against the two radial faces of the brake shoe for contact in an area encompassed by an arc of about 60* so that the support together with the brake shoes and the actuating mechanism may be pivoted out of its operating condition without releasing the brake disc from the wheel, and the wheel then taken from the bicycle frame for replacement of a tire.
Inventors
- 👤 Eduard Bergles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:12
CPC Classifications
B; B62; B62L; B62L1/00; B62K; B62K19/00; B62K19/30; B62K19/38; F; F16; F16D; F16D55/00; F16D55/02; F16D55/22; F16D55/224; F16D2125/00; F16D2125/18; F16D2125/20; F16D2125/34; F16D2125/40; F16D2125/58; F16D2125/60
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
311 words
A disc brake for a bicycle and like vehicle having a frame and a wheel mounted on said frame for rotation about an axis, said brake comprising: a. a brake disc having an axis of rotation and two radially extending contact faces; b. first securing means for coaxially securing said disc to said wheel for joint rotation; c. a support; d. second securing means for releasably securing said support to said frame in an operative condition; e. a brake shoe holder of substantially U-shaped cross section mounted on said support for movement in the direction of the common axis of said disc and said wheel in said operative condition, 1. said brake shoe holder having two flange portions and a web portion connecting said flange portions which extend from said web portion in a direction away from said common axis, 2. said web portion being formed with a slot, 3. said disc passing through said slot with little clearance so as to limit said movement of said brake shoe holder relative to said support in said operative condition, 4. a portion of said disc projecting through said slot in a direction away from said common axis in said operative condition of the support; f. two brake shoes, 1. said portions of said brake shoe holder jointly enveloping a portion of each brake shoe, 2. respective parts of said brake shoe holder constituting guide means slidably engaging said brake shoes for movement of the engaged brake shoes relative to said brake shoe holder toward and away from a braking position, 3. said brake shoes, when in said braking position, receiving said projecting portion of said disc axially therebetween and frictionally engaging said contact faces when said support is in the operative condition; and g. brake actuating means on said support for moving said brake shoes toward and away from said braking position.
Claim 2
Dependent Claim
311 words
A disc brake for a bicycle and like vehicle having a frame and a wheel mounted on said frame for rotation about an axis, said brake comprising: a. a brake disc having an axis of rotation and two radially extending contact faces; b. first securing means for coaxially securing said disc to said wheel for joint rotation; c. a support; d. second securing means for releasably securing said support to said frame in an operative condition; e. a brake shoe holder of substantially U-shaped cross section mounted on said support for movement in the direction of the common axis of said disc and said wheel in said operative condition, 1. said brake shoe holder having two flange portions and a web portion connecting said flange portions which extend from said web portion in a direction away from said common axis, 2. said web portion being formed with a slot, 3. said disc passing through said slot with little clearance so as to limit said movement of said brake shoe holder relative to said support in said operative condition, 4. a portion of said disc projecting through said slot in a direction away from said common axis in said operative condition of the support; f. two brake shoes, 1. said portions of said brake shoe holder jointly enveloping a portion of each brake shoe, 2. respective parts of said brake shoe holder constituting guide means slidably engaging said brake shoes for movement of the engaged brake shoes relative to said brake shoe holder toward and away from a braking position, 3. said brake shoes, when in said braking position, receiving said projecting portion of said disc axially therebetween and frictionally engaging said contact faces when said support is in the operative condition; and g. brake actuating means on said support for moving said brake shoes toward and away from said braking position.
Claim 3
Dependent Claim
19 words
A brake as set forth in claim 1, wherein respective portions of said flange portions constitute said guide means.
Claim 4
Dependent Claim
8 words
said web portion being formed with a slot,
Claim 5
Dependent Claim
8 words
said web portion being formed with a slot,
Claim 6
Dependent Claim
35 words
respective parts of said brake shoe holder constituting guide means slidably engaging said brake shoes for movement of the engaged brake shoes relative to said brake shoe holder toward and away from a braking position,
Claim 7
Dependent Claim
35 words
respective parts of said brake shoe holder constituting guide means slidably engaging said brake shoes for movement of the engaged brake shoes relative to said brake shoe holder toward and away from a braking position,
Claim 8
Dependent Claim
51 words
said brake shoes, when in said braking position, receiving said projecting portion of said disc axially therebetween and frictionally engaging said contact faces when said support is in the operative condition; and g. brake actuating means on said support for moving said brake shoes toward and away from said braking position.
Claim 9
Dependent Claim
51 words
said brake shoes, when in said braking position, receiving said projecting portion of said disc axially therebetween and frictionally engaging said contact faces when said support is in the operative condition; and g. brake actuating means on said support for moving said brake shoes toward and away from said braking position.
Claim 10
Dependent Claim
28 words
said disc passing through said slot with little clearance so as to limit said movement of said brake shoe holder relative to said support in said operative condition,
Claim 11
Dependent Claim
28 words
said disc passing through said slot with little clearance so as to limit said movement of said brake shoe holder relative to said support in said operative condition,
Claim 12
Dependent Claim
32 words
A brake as set forTh in claim 1, further comprising a lug projecting from said web portion, said lug limiting movement of one of said brake shoes away from said braking position.
Claim 13
Dependent Claim
28 words
a portion of said disc projecting through said slot in a direction away from said common axis in said operative condition of the support; f. two brake shoes,
Claim 14
Dependent Claim
28 words
a portion of said disc projecting through said slot in a direction away from said common axis in said operative condition of the support; f. two brake shoes,
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-22 | 1979-06-23 | 1979-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-22 | 1983-06-23 | 1983-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-22 | 1987-06-23 | 1987-12-23 | $7700.00 | Window Closed / Lapsed |