US3128849A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic brake adjusting mechanism
Assignee: —
•
Filing: —
•
Granted: 1964-04-14
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Expires: 1981-04-14
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:32
CPC Classifications
F; F16; F16D; F16D65/00; F16D65/38; F16D65/40; F16D65/52; F16D65/56; F16D65/561; F16D65/565
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
178 words
IN AN ADJUSTING MEANS FOR A BRAKE MECHANISM COMPRISING FIRST AND SECOND BRAKE SHOES, A BRAKE DRUM, AN ANCHOR, MEANS FOR MOVING SAID BRAKE SHOES AWAY FROM SAID ANCHOR AND INTO ENGAGEMENT WITH SAID BRAKE DRUM, AN EXTENSIBLE STRUT CONNECTING ADJACENT ENDS OF SAID SHOES, AND A ROTATABLE TOOTHED WHEEL WHICH CONTROLS THE EXTENSION OF SAID STRUT, THAT IMPROVEMENT WHICH COMPRISES, A UNITARY SPRING DEVICE COMPRISING A PORTION FUNCTIONING AS A PAWL, A SLEEVE-LIKE PORTION ENGAGING SAID STRUT AND A BIFURCATED PORTION ENGAGING THE WEB AT THE END OF THE ADJACENT BRAKE SHOE TO NONROTATABLY HOLD SAID SPRING DEVICE ON SAID STRUT, AND OPERATING MEANS FOR SAID PAWL MOUNTED ON SAID SECOND SHOE AND CONNECTED TO SAID ANCHOR WHEREBY MOVEMENT OF SAID SECOND SHOE INTO BRAKE APPLYING POSITION MOVES SAID PAWL IN ONE DIRECTION TO ENGAGE A SUCCESSIVE PORTION OF SAID TOOTHED WHEEL AND LOADS SAID SPRING DEVICE, WHEREUPON SAID SPRING DEVICE SERVES TO URGE SAID PAWL TO ITS ORIGINAL POSITION TO THEREBY ADJUSTABLY ROTATE SAID TOOTHED WHEEL WHEN THE BRAKE IS RELEASED AND SAID SHOE IS RETRACTED.
Claim 2
Dependent Claim
178 words
IN AN ADJUSTING MEANS FOR A BRAKE MECHANISM COMPRISING FIRST AND SECOND BRAKE SHOES, A BRAKE DRUM, AN ANCHOR, MEANS FOR MOVING SAID BRAKE SHOES AWAY FROM SAID ANCHOR AND INTO ENGAGEMENT WITH SAID BRAKE DRUM, AN EXTENSIBLE STRUT CONNECTING ADJACENT ENDS OF SAID SHOES, AND A ROTATABLE TOOTHED WHEEL WHICH CONTROLS THE EXTENSION OF SAID STRUT, THAT IMPROVEMENT WHICH COMPRISES, A UNITARY SPRING DEVICE COMPRISING A PORTION FUNCTIONING AS A PAWL, A SLEEVE-LIKE PORTION ENGAGING SAID STRUT AND A BIFURCATED PORTION ENGAGING THE WEB AT THE END OF THE ADJACENT BRAKE SHOE TO NONROTATABLY HOLD SAID SPRING DEVICE ON SAID STRUT, AND OPERATING MEANS FOR SAID PAWL MOUNTED ON SAID SECOND SHOE AND CONNECTED TO SAID ANCHOR WHEREBY MOVEMENT OF SAID SECOND SHOE INTO BRAKE APPLYING POSITION MOVES SAID PAWL IN ONE DIRECTION TO ENGAGE A SUCCESSIVE PORTION OF SAID TOOTHED WHEEL AND LOADS SAID SPRING DEVICE, WHEREUPON SAID SPRING DEVICE SERVES TO URGE SAID PAWL TO ITS ORIGINAL POSITION TO THEREBY ADJUSTABLY ROTATE SAID TOOTHED WHEEL WHEN THE BRAKE IS RELEASED AND SAID SHOE IS RETRACTED.
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) | 1967-04-14 | 1967-10-14 | 1968-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-14 | 1971-10-14 | 1972-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-14 | 1975-10-14 | 1976-04-14 | $7700.00 | Window Closed / Lapsed |