Patent US3147045A successfully refreshed from Google Patents.
US3147045A
Expired / Lapsed
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Brake pressure proportioning device
Assignee: ZF Active Safety US Inc
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Filing: 1961-12-18
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Granted: 1964-09-01
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Expires: 1981-12-18
Abstract
No abstract record available.
Inventors
- 👤 Stelzer William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:49
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/26; Y; Y10; Y10T; Y10T137/00; Y10T137/0753
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
A BRAKE PRESSURE CONTROL DEVICE FOR A VEHICLE INCLUDING A HOUSING HAVING AN INLET OPENING, AN OUTLET OPENING AND A BORE PROVIDING COMMUNICATION BETWEEN SAID INLET OPENING AND SAID OUTLET OPENING, A PRESSURE PROPORTIONING PISTON IN SAID BORE, MEANS PROVIDING A PASSAGE FOR THE DIRECT TRANSMISSION OF FLUID PRESSURE FROM SAID INLET TO SAID OUTLET PAST SAID PISTON, A MOVABLE ELEMENT MOVABLE RELATIVE TO SAID PISTON AND TOWARD SAID OUTLET OPENING, SAID MOVABLE ELEMENT HAVING A VALVE SEAT ARRANGED TO BLOCK THE FLOW OF FLUID THROUGH SAID PASSAGE UPON THE CLOSURE OF SAID VALVE SEAT, MEANS FOR CLOSING SAID VALVE SEAT UPON THE OCCURRENCE OF PREDETERMINED CONDITIONS DURING BRAKE APPLICATION, AND MEANS YIELDINGLY RESISTING MOVEMENT OF SAID MOVABLE ELEMENT TOWARD SAID OUTLET OPENING.
Claim 2
Dependent Claim
123 words
A BRAKE PRESSURE CONTROL DEVICE FOR A VEHICLE INCLUDING A HOUSING HAVING AN INLET OPENING, AN OUTLET OPENING AND A BORE PROVIDING COMMUNICATION BETWEEN SAID INLET OPENING AND SAID OUTLET OPENING, A PRESSURE PROPORTIONING PISTON IN SAID BORE, MEANS PROVIDING A PASSAGE FOR THE DIRECT TRANSMISSION OF FLUID PRESSURE FROM SAID INLET TO SAID OUTLET PAST SAID PISTON, A MOVABLE ELEMENT MOVABLE RELATIVE TO SAID PISTON AND TOWARD SAID OUTLET OPENING, SAID MOVABLE ELEMENT HAVING A VALVE SEAT ARRANGED TO BLOCK THE FLOW OF FLUID THROUGH SAID PASSAGE UPON THE CLOSURE OF SAID VALVE SEAT, MEANS FOR CLOSING SAID VALVE SEAT UPON THE OCCURRENCE OF PREDETERMINED CONDITIONS DURING BRAKE APPLICATION, AND MEANS YIELDINGLY RESISTING MOVEMENT OF SAID MOVABLE ELEMENT TOWARD SAID OUTLET OPENING.
References Cited (Backward Citations)
US2218194A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-01 | 1968-03-02 | 1968-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-01 | 1972-03-02 | 1972-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-01 | 1976-03-02 | 1976-09-01 | $7700.00 | Window Closed / Lapsed |