US3220516A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic brake adjusting mechanism
Assignee: ZF Active Safety US Inc
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Filing: 1964-02-04
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Granted: 1965-11-30
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Expires: 1984-02-04
Abstract
No abstract record available.
Inventors
- 👤 Harvey C Swift
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:16
CPC Classifications
F; F16; F16D; F16D51/00; F16D51/46; F16D51/48; F16D65/00; F16D65/02; F16D65/04; F16D65/08; F16D65/09; F16D65/091; F16D65/38; F16D65/40; F16D65/52; F16D65/56; F16D65/561; F16D65/565
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
161 words
A BRAKE MECHANISM COMPRISING AT LEAST ONE BRAKE SHOE, A BRAKE DRUM, AN ANCHOR, A BACKING PLATE, MEANS FOR MOVING SAID BRAKE SHOE AWAY FROM SAID ANCHOR AND INTO ENGAGEMENT WITH SAID BRAKE DRUM, AN EXTENSIBLE STRUT ENGAGING AN END OF SAID BRAKE SHOE AND HAVING A MOVABLE PART WHICH CONTROLS THE EXTENSION OF SAID STRUT, A COIL SPRING CLUTCH EMBRACING SAID MOVABLE STRUT PART AND ADAPTED WHEN TIGHTENED THEREON TO GRIP AND ROTATE THE SAME, A BRAKE SHOE HOLDDOWN DEVICE COMPRISING A ROD MOUNTED ON SAID BACKING PLATE, A BELL CRANK LEVER PIVOTALLY MOUNTED ON SAID ROD AND ENGAGING SAID BRAKE SHOE, SPRING MEANS ENGAGING SAID BELL CRANKK LEVER TO URGE THE SAME INTO ENGAGEMENT WITH SAID BRAKE SHOE AND MEANS CONNECTING SAID BELL CRANK LEVER TO SAID ANCHOR AND TO SAID CLUTCH WHEREBY MOVEMENT OF SAID BRAKE SHOE IN ONE DIRECTION WILL ROCK SAID BELL CRANK AND ENGAGE SAID CLUTCH WITH SID MOVABLE STRUT PART TO ACTUATE THE SAME.
Claim 2
Dependent Claim
161 words
A BRAKE MECHANISM COMPRISING AT LEAST ONE BRAKE SHOE, A BRAKE DRUM, AN ANCHOR, A BACKING PLATE, MEANS FOR MOVING SAID BRAKE SHOE AWAY FROM SAID ANCHOR AND INTO ENGAGEMENT WITH SAID BRAKE DRUM, AN EXTENSIBLE STRUT ENGAGING AN END OF SAID BRAKE SHOE AND HAVING A MOVABLE PART WHICH CONTROLS THE EXTENSION OF SAID STRUT, A COIL SPRING CLUTCH EMBRACING SAID MOVABLE STRUT PART AND ADAPTED WHEN TIGHTENED THEREON TO GRIP AND ROTATE THE SAME, A BRAKE SHOE HOLDDOWN DEVICE COMPRISING A ROD MOUNTED ON SAID BACKING PLATE, A BELL CRANK LEVER PIVOTALLY MOUNTED ON SAID ROD AND ENGAGING SAID BRAKE SHOE, SPRING MEANS ENGAGING SAID BELL CRANKK LEVER TO URGE THE SAME INTO ENGAGEMENT WITH SAID BRAKE SHOE AND MEANS CONNECTING SAID BELL CRANK LEVER TO SAID ANCHOR AND TO SAID CLUTCH WHEREBY MOVEMENT OF SAID BRAKE SHOE IN ONE DIRECTION WILL ROCK SAID BELL CRANK AND ENGAGE SAID CLUTCH WITH SID MOVABLE STRUT PART TO ACTUATE THE SAME.
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) | 1968-11-29 | 1969-05-31 | 1969-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-29 | 1973-05-31 | 1973-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-29 | 1977-05-31 | 1977-11-30 | $7700.00 | Window Closed / Lapsed |