US3280944A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spring-applied power released vehicle wheel tread brake assembly
Assignee: Westinghouse Air Brake Co
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Filing: 1964-11-27
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Granted: 1966-10-25
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Expires: 1984-11-27
Abstract
No abstract record available.
Inventors
- 👤 Allen W Kyllonen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:27
CPC Classifications
B; B61; B61H; B61H13/00; B61H13/005; B60; B60T; B60T13/00; B60T13/74; B60T13/741; B60T13/743; B61H1/00; B61H1/003; F; F16; F16D; F16D59/00; F16D59/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
A UNIT BRAKE ASSEMBLY FOR A VEHICLE WHEEL COMPRISING: (A) A BRAKE SHOE MEANS FOR APPLYING A BRAKING FORCE TO A VEHICLE WHEEL, (B) A PIVOTED LEVER EFFECTIVE UPON ROCKING IN ONE DIRECTION TO APPLY SAID BRAKE SHOE MEANS AND UPON ROCKING IN THE OPPOSITE DIRECTION TO RELEASE SAID BRAKE SHOE MEANS, (C) A SCREW-THREADED MEMBER ROTATABLY MOUNTED FOR ROTATION ON ITS LONGITUDINAL AXIS, (D) A TRAVELLING NUT FOR SAID SCREW-THREADED MEMBER AND CONNECTED TO SAID PIVOTED LEVER SO AS TO ROCK SAID LEVER IN OPPOSITE DIRECTIONS CORRESPONDING TO THE DIRECTION OF TRAVEL OF SAID TRAVELING NUT ON SAID SCREW-THREADED MEMBER AS THE SCREW-THREADED MEMBER IS ROTATED, (E) A SPIRAL SPRING, (F) RELEASABLE LOCKING MEANS FOR ANCHORING THE OUTER END OF SAID SPIRAL SPRING AGAINST MOVEMENT WHEN LOCKED, (G) MEANS CONNECTING THE INNER END OF SAID SPIRAL SPRING TO SAID SCREW-THREADED MEMBER,
Claim 2
Dependent Claim
142 words
A UNIT BRAKE ASSEMBLY FOR A VEHICLE WHEEL COMPRISING: (A) A BRAKE SHOE MEANS FOR APPLYING A BRAKING FORCE TO A VEHICLE WHEEL, (B) A PIVOTED LEVER EFFECTIVE UPON ROCKING IN ONE DIRECTION TO APPLY SAID BRAKE SHOE MEANS AND UPON ROCKING IN THE OPPOSITE DIRECTION TO RELEASE SAID BRAKE SHOE MEANS, (C) A SCREW-THREADED MEMBER ROTATABLY MOUNTED FOR ROTATION ON ITS LONGITUDINAL AXIS, (D) A TRAVELLING NUT FOR SAID SCREW-THREADED MEMBER AND CONNECTED TO SAID PIVOTED LEVER SO AS TO ROCK SAID LEVER IN OPPOSITE DIRECTIONS CORRESPONDING TO THE DIRECTION OF TRAVEL OF SAID TRAVELING NUT ON SAID SCREW-THREADED MEMBER AS THE SCREW-THREADED MEMBER IS ROTATED, (E) A SPIRAL SPRING, (F) RELEASABLE LOCKING MEANS FOR ANCHORING THE OUTER END OF SAID SPIRAL SPRING AGAINST MOVEMENT WHEN LOCKED, (G) MEANS CONNECTING THE INNER END OF SAID SPIRAL SPRING TO SAID SCREW-THREADED MEMBER,
References Cited (Backward Citations)
US3131788A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-24 | 1970-04-25 | 1970-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-24 | 1974-04-25 | 1974-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-24 | 1978-04-25 | 1978-10-25 | $7700.00 | Window Closed / Lapsed |