US3568441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two pedal hydraulic braking system
Assignee: Girling Ltd
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Filing: 1969-05-07
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Granted: 1971-03-09
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Expires: 1989-05-07
Abstract
Abstract IN A TWO-PEDAL HYDRAULIC BRAKING SYSTEM IN WHICH BRAKES ON WHEELS ON OPPOSITE SIDES OF A VEHICLE ARE APPLIED BY FLUID FROM THE PRESSURE SPACES OF TWO MASTER CYLINDERS OF WHICH THE PISTONS ARE ACTUATED BY SEPARATE PEDALS, CROSS COMPENSATION BETWEEN THE BRAKES ON OPPOSITE SIDES OF THE VEHICLE IS PROVIDED BY A TRANSFER PASSAGE COMMUNICATING WITH THE PRESSURE SPACES OF THE TWO CYLINDERS THROUGH AXIAL PASSAGES IN THE PISTONS CONTROLLED BY NORMALLY CLOSED TRANSFER VALVES WHICH ARE OPENED BY MOVEMENT OF THE PISTIONS IN THE BRAKE-APPLYING DIRECTION.
Inventors
- 👤 Stanley Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:03
CPC Classifications
B; B60; B60T; B60T11/00; B60T11/10; B60T11/16; B60T11/20; B60T11/21; B60T7/00; B60T7/02; B60T7/04
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) | 1974-03-08 | 1974-09-07 | 1975-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-08 | 1978-09-07 | 1979-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-08 | 1982-09-07 | 1983-03-09 | $7700.00 | Window Closed / Lapsed |