Patent US3623577A successfully refreshed from Google Patents.
US3623577A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrugated rotor for disk brakes
Assignee: ZF Active Safety US Inc
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Filing: 1969-11-13
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Granted: 1971-11-30
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Expires: 1989-11-13
Abstract
Abstract A disk brake assembly having two embodiments of rotors each of which provides a plurality of separate braking surfaces with airgaps disposed between the braking surfaces. The braking surfaces and airgaps are disposed at an angle to the edge of the brake pad so that the brake pad edge is always in contact with at least two of the braking surfaces.
Inventors
- 👤 Ronald S Scharlack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:53
CPC Classifications
F; F16; F16D; F16D65/00; F16D65/02; F16D65/12; F16D65/128; F16D65/127; F16D2065/13; F16D2065/1304; F16D2065/132; F16D2065/134; F16D2065/1344; F16D69/00; F16D2069/004
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
175 words
In a disk brake assembly having a brake pad with a frictional lining, means for actuating said brake pad and an associated rotor, said rotor having an area adapted to be swept by said frictional lining of said brake pad, said brake pad frictional lining extending for substantially less than the circumference of said rotor and having edges extending across the area of the rotor swept thereby, the improvement comprising means on said rotor providing a plurality of spaced airgaps separated by braking surfaces, said airgaps extending across the width of the frictional lining for providing a continuous path for cooling air between the adjacent braking surfaces, said brake surfaces being disposed at an angle to the adjacent edge of said frictional lining, the edges of said brake surfaces surrounding each airgap being disposed at such an angle to each other and to said edges of said brake pad frictional lining that said edge of said lining always are in contact with at least two of said braking surfaces when actuated by said actuating means.
Claim 2
Dependent Claim
175 words
In a disk brake assembly having a brake pad with a frictional lining, means for actuating said brake pad and an associated rotor, said rotor having an area adapted to be swept by said frictional lining of said brake pad, said brake pad frictional lining extending for substantially less than the circumference of said rotor and having edges extending across the area of the rotor swept thereby, the improvement comprising means on said rotor providing a plurality of spaced airgaps separated by braking surfaces, said airgaps extending across the width of the frictional lining for providing a continuous path for cooling air between the adjacent braking surfaces, said brake surfaces being disposed at an angle to the adjacent edge of said frictional lining, the edges of said brake surfaces surrounding each airgap being disposed at such an angle to each other and to said edges of said brake pad frictional lining that said edge of said lining always are in contact with at least two of said braking surfaces when actuated by said actuating means.
Claim 3
Dependent Claim
30 words
A disk brake assembly as set forth in claim 1 wherein the rotor is formed with two series of braking surfaces as defined, one on either side of the rotor.
Claim 4
Dependent Claim
31 words
A disk brake assembly as set forth in claim 2 wherein the rotor has a generally corrugated shape in circumferential cross sections with the peaks thereof defining the respective braking surfaces.
Claim 5
Dependent Claim
26 words
A disk brake assembly as set forth in claim 3 wherein the cross-sectional shape of the rotor in the circumferential sections generally resemble a sine wave.
Claim 6
Dependent Claim
30 words
A disk brake assembly as set forth in claim 3 wherein the peaks are formed by generally flattened sections of the rotor and are interconnected by generally axially extending sections.
Claim 7
Dependent Claim
16 words
A rotor as set forth in claim 3 wherein the rotor is formed from sheet steel.
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) | 1974-11-29 | 1975-05-31 | 1975-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-29 | 1979-05-31 | 1979-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-29 | 1983-05-31 | 1983-11-30 | $7700.00 | Window Closed / Lapsed |