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Patent US3567290A successfully refreshed from Google Patents.
US3567290A
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Failure indicating device for skid control system
Assignee: ZF Active Safety US Inc
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Filing: 1968-12-09
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Granted: 1971-03-02
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Expires: 1988-12-09
Abstract
Abstract IN A SKID CONTROL SYSTEM FOR CONTROLLING THE FLUID PRESSURE APPLIED TO THE BRAKES OF AT LEAST ONE WHEEL OF A WHEELED VEHICLE FROM A SOURCE OF BRAKE ACTUATING FLUID AND COMPRISING MODULATING MEANS HAVING FLUID INLET AND OUTLET PORTIONS FOR CONTROLLING THE MAGNITUDE OF THE BRAKE ACTUATING FLUID SUPPLY TO THE BRAKES, THE IMPROVEMENT COMPRISING SENSING MEANS FOR SENSING THE DIFFERENTIAL PRESSURE CONDITIONS BETWEEN THE FLUID INLET AND OUTLET PORTIONS OIF THE MODULATING MEANS, AND INDICATING MEANS PROVIDING A SIGNAL FOR THE VEHICLE OPERATOR TO INDICATE ACTUATION OF THE SENSING MEANS.
Inventors
- 👤 John V Liggett
- 👤 Frank L Moncher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:26
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/32; B60T8/34; B60T8/42; B60T8/4208; B60T8/4225; B60T8/4241; B60T8/425; B60T13/00; B60T13/10; B60T13/24; B60T13/46; B60T13/52; B60T17/00; B60T17/18; B60T17/22; B60T8/88; B60T8/92; B60T8/94
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |