Patent US3131787A successfully refreshed from Google Patents.
US3131787A
Expired / Lapsed
US
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Automatic brake adjusting mechanism
Assignee: ZF Active Safety US Inc
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Filing: 1962-11-26
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Granted: 1964-05-05
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Expires: 1982-11-26
Abstract
No abstract record available.
Inventors
- 👤 Harvey C Swift
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:47
CPC Classifications
F; F16; F16D; F16D51/00; F16D51/46; F16D51/48; F16D51/16; F16D51/18; F16D51/20; F16D51/24; F16D65/00; F16D65/38; F16D65/40; F16D65/52; F16D65/56; F16D65/561; F16D65/565
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
IN A BRAKE MECHANISM COMPRISING A PAIR OF BRAKE SHOES, A BRAKE DRUM, MEANS FOR MOVING SAID BRAKE SHOES INTO ENGAGEMENT WITH SAID BRAKE DRUM, BRAKE ACTUATING MECHANISM BETWEEN ADJACENT ENDS OF SAID BRAKE SHOES, SAID ACTUATING MECHANISM INCLUDING A MOVABLE PART, AND AN ADJUSTABLE STRUT HAVING A MOVABLE PART LOCATED BETWEEN SAID BRAKE SHOE ENDS, THAT IMPROVEMENT WHICH COMPRISES, A HELICAL COIL SPRING CLUTCH SURROUNDING SAID MOVABLE STRUT PART AND ADAPTED WHEN TIGHTENED TO GRIP AND ROTATE THE SAME AND MEANS CONNECTING SAID CLUTCH
Claim 2
Dependent Claim
85 words
IN A BRAKE MECHANISM COMPRISING A PAIR OF BRAKE SHOES, A BRAKE DRUM, MEANS FOR MOVING SAID BRAKE SHOES INTO ENGAGEMENT WITH SAID BRAKE DRUM, BRAKE ACTUATING MECHANISM BETWEEN ADJACENT ENDS OF SAID BRAKE SHOES, SAID ACTUATING MECHANISM INCLUDING A MOVABLE PART, AND AN ADJUSTABLE STRUT HAVING A MOVABLE PART LOCATED BETWEEN SAID BRAKE SHOE ENDS, THAT IMPROVEMENT WHICH COMPRISES, A HELICAL COIL SPRING CLUTCH SURROUNDING SAID MOVABLE STRUT PART AND ADAPTED WHEN TIGHTENED TO GRIP AND ROTATE THE SAME AND MEANS CONNECTING SAID CLUTCH
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) | 1967-05-05 | 1967-11-04 | 1968-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-05 | 1971-11-04 | 1972-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-05 | 1975-11-04 | 1976-05-05 | $7700.00 | Window Closed / Lapsed |