US3135359A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Caliper type disc brake
Assignee: Dunlop Rubber Co Ltd
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Filing: 1962-08-28
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Granted: 1964-06-02
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Expires: 1982-08-28
Abstract
No abstract record available.
Inventors
- 👤 Davis John Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:54
CPC Classifications
F; F16; F16D; F16D65/00; F16D65/02; F16D65/04; F16D65/092; F16D55/00; F16D55/02; F16D55/22; F16D55/224; F16D55/2245; F16D65/38; F16D65/40; F16D65/52; F16D2065/026
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
156 words
A DISC BRAKE COMPRISING A ROTATABLE DISC, AT LEAST ONE FRICTION ELEMENT HAVING A SURFACE TO ENGAGE FRICTIONALLY A RADIAL SURFACE OF A BRAKE DISC, SAID SURFACE OF SAID FRICTION ELEMENT BEING OF A CIRCUMFERENTIALLY-DISPLACED SEGMENTAL SHAPE HAVING A TRIALING EDGE TO ABUT A STRESS SUPPORTING MEMBER, SAID EDGE BEING NORMAL TO A LINE PASSING THROUGH THE CENTROID OF SAID FRICTION ELEMENT AT A RIGHT ANGLE TO A RADIAL LINE FROM THE CENTER OF SAID DISC TO SAID CENTROID, SAID ELEMENT HAVING A LEADING EDGE AND RADIALLY INNER AND OUTER EDGES, THE ANGLE FORMED BY RADII OF EQUAL LENGTH FROM THE CENTER OF SAID DISC TO SAID LEADING AND TRAILING EDGES BEING CONSTANT, A NON-ROTATABLE STRESS RECEIVING MEMBER HAVING AN ABUTTING SURFACE COMPLEMENTARY TO THE TRAILING EDGE OF SAID FRICTION ELEMENT AND POSITIONED TO SUPPORT THE FORCE IMPOSED PARALLEL TO SAID DISC BY THE DRAG OF SAID DISC WHEN SAID FRICTION ELEMENT FRICTIONALLY ENGAGES SAID DISC.
Claim 2
Dependent Claim
156 words
A DISC BRAKE COMPRISING A ROTATABLE DISC, AT LEAST ONE FRICTION ELEMENT HAVING A SURFACE TO ENGAGE FRICTIONALLY A RADIAL SURFACE OF A BRAKE DISC, SAID SURFACE OF SAID FRICTION ELEMENT BEING OF A CIRCUMFERENTIALLY-DISPLACED SEGMENTAL SHAPE HAVING A TRIALING EDGE TO ABUT A STRESS SUPPORTING MEMBER, SAID EDGE BEING NORMAL TO A LINE PASSING THROUGH THE CENTROID OF SAID FRICTION ELEMENT AT A RIGHT ANGLE TO A RADIAL LINE FROM THE CENTER OF SAID DISC TO SAID CENTROID, SAID ELEMENT HAVING A LEADING EDGE AND RADIALLY INNER AND OUTER EDGES, THE ANGLE FORMED BY RADII OF EQUAL LENGTH FROM THE CENTER OF SAID DISC TO SAID LEADING AND TRAILING EDGES BEING CONSTANT, A NON-ROTATABLE STRESS RECEIVING MEMBER HAVING AN ABUTTING SURFACE COMPLEMENTARY TO THE TRAILING EDGE OF SAID FRICTION ELEMENT AND POSITIONED TO SUPPORT THE FORCE IMPOSED PARALLEL TO SAID DISC BY THE DRAG OF SAID DISC WHEN SAID FRICTION ELEMENT FRICTIONALLY ENGAGES SAID DISC.
References Cited (Backward Citations)
US2942695A
Cited
US2909246A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-02 | 1967-12-02 | 1968-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-02 | 1971-12-02 | 1972-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-02 | 1975-12-02 | 1976-06-02 | $7700.00 | Window Closed / Lapsed |