US3558197A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vehicle braking system
Assignee: Borg Warner Corp
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Filing: 1968-09-25
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Granted: 1971-01-26
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Expires: 1988-09-25
Abstract
Abstract A BRAKING SYSTEM IS PROVIDED WITH ANTISKID MEANS INCLUDING RECIPROCATING APPARATUS FOR LOWERING AND RAISING THE PRESSURE IN A HYDRAULIC BRAKE CYLINDER BY CYCLICALLY RELEASING AND RETURNING FLUID FROM AND TO THE BRAKE CYLINDER. THE FREQUENCY AT WHICH FLUID IS RELEASED IS DETERMINED BY A PULSE GENERATING CIRCUIT. THE PRESSURE EXERTED DURING THE RETURN OF FLUID TO THE CYLINDER IS DETERMINED BY A LINEAR SPRING MOTOR HAVING A COMPOUND SPRING RATE. THE RATES OF PRESSURE DROP AND PRESSURE RISE IN THE BRAKE CYLINDER ARE REGULATED BY A FLOW CONTROL VALVE HAVING A VARIABLE ORIFICE PERMITTING RAPID PRESSURE DROP AND GRADUAL PRESSURE RISE.
Inventors
- 👤 Frederick E Lueck
- 👤 Michael J Denholm
- 👤 William J Borowski
- 👤 Steven M Kroml
- 👤 Michael A Gasperi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:20
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/17; B60T8/176; B60T8/1761; B60T8/17613; B60T8/32; B60T8/34; B60T8/50; B60T8/5018; B60T8/5025; B60T8/5037; B60T8/5043
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) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |