US3675741A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bicycle disc brake
Assignee: Bendix Corp
•
Filing: 1971-03-29
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Granted: 1972-07-11
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Expires: 1991-03-29
Abstract
Abstract A disc brake for bicycles having a rotor mounted externally on a bicycle wheel hub and a brake housing mounted in a bracket affixed to the wheel axle wherein the brake housing has limited slidable movement in the support bracket to permit alignment with the rotor but is restrained from rotating about its own axis by a complementary opening and housing shape. The brake includes a mechanically manipulated threaded actuator to apply brake motion with a high mechanical advantage.
Inventors
- 👤 Karl Frei
- 👤 Edwin Elliott Hood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:13
CPC Classifications
F; F16; F16D; F16D55/00; F16D55/02; F16D55/22; F16D55/224; B; B62; B62L; B62L3/00; B62L3/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
217 words
A disc brake for a bicycle having a fixed frame supported shaft and a rotatable hub concentrically mounted about said shaft, said disc brake comprising: a brake disc rotor member adapted to be secured to said rotatable hub at one side thereof for rotation therewith; a brake support member adapted to be secured to a fixed portion of the bicycle having a noncircular opening therein generally normal to and in alignment with the radial outer edge portion of the rotor member; a brake housing member disposed within the noncircular opening in said support member having an external surface shape complementary to and interfitting with said noncircular opening so that said housing is slidable with said support member in a direction normal to said rotor member but restrained against rotation about its own axis; said brake housing having a slot formed therein intermediate its ends for receiving the outer radial edge portion of said rotor member; a screw actuator member threadedly secured within said brake housing member having one end extending externally of said housing member and another end in confronting braking relationship with said rotor member; and brake actuating means operative to apply a rotating torque to said one end of said screw actuator member to advance said member into frictional braking contact with said rotor member.
Claim 2
Dependent Claim
217 words
A disc brake for a bicycle having a fixed frame supported shaft and a rotatable hub concentrically mounted about said shaft, said disc brake comprising: a brake disc rotor member adapted to be secured to said rotatable hub at one side thereof for rotation therewith; a brake support member adapted to be secured to a fixed portion of the bicycle having a noncircular opening therein generally normal to and in alignment with the radial outer edge portion of the rotor member; a brake housing member disposed within the noncircular opening in said support member having an external surface shape complementary to and interfitting with said noncircular opening so that said housing is slidable with said support member in a direction normal to said rotor member but restrained against rotation about its own axis; said brake housing having a slot formed therein intermediate its ends for receiving the outer radial edge portion of said rotor member; a screw actuator member threadedly secured within said brake housing member having one end extending externally of said housing member and another end in confronting braking relationship with said rotor member; and brake actuating means operative to apply a rotating torque to said one end of said screw actuator member to advance said member into frictional braking contact with said rotor member.
Claim 3
Dependent Claim
46 words
A disc brake for a bicycle as claimed in claim 1 wherein: said brake support member is a radially disposed bracket arm member adapted to be secured at one end to the shaft of a bicycle and extending radially a distance greater than the rotor member.
Claim 4
Dependent Claim
49 words
A disc brake for a bicycle as claimed in claim 2 wherein: said brake support member has spaced pair of plate portions formed at its radially outer end, each having a mating noncircular opening formed therein to support the brake housing member at spaced locations along its axial extent.
Claim 5
Dependent Claim
34 words
A disc brake for a bicycle as claimed in claim 3 wherein: each of the pair of plate portions of said brake support member are arranged on opposite sides of the braKe rotor member.
Claim 6
Dependent Claim
36 words
A disc brake for a bicycle as claimed in claim 1 wherein: said brake housing member containing a fixed reaction member axially aligned with said screw actuator member on the opposed side of the rotor member.
Claim 7
Dependent Claim
36 words
A disc brake for a bicycle as claimed in claim 1 including: retention means retaining said housing member within said noncircular opening while permitting limited axial movement thereof for alignment with said rotor member during braking.
Claim 8
Dependent Claim
46 words
A disc brake for a bicycle as claimed in claim 1 wherein: said actuating means includes a rod and one-way overrunning clutch adapted to be connected to a bicycle foot pedaled crank assembly to impart a brake actuation motion on back rotation of the crank assembly.
References Cited (Backward Citations)
US2612968A
Cited
US3052326A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |