US3605410A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fail-safe vehicle braking system with independent front and rear subassemblies
Assignee: Individual
•
Filing: 1969-06-16
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Granted: 1971-09-20
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Expires: 1989-06-16
Abstract
Abstract A MASTER CYLINDER ASSEMBLY FOR CONTROLLING A HYDRAULIC SYSTEM, INCLUDING A VEHICLE BRAKING SYSTEM, UTILIZING A PLURALITY OF MASTER PISTONS OF GRADUATED SIZE UNDER THE CONTROL OF A COMMON MANUALLY-OPERATED ACTUATOR. THE NORMALLY RETRACTED MASTER PISTONS COOPERATE WHEN FIRST ACTUATED TO CHARGE THE SYSTEM QUICKLY WITH FLUID UNDER LOW PRESSURE, FOLLOWING WHICH THE LARGER PISTON IS DEACTIVATED AS THE LOAD IS ASSUMED BY A SMALLER ONE OF THE PISTONS EFFECTIVE TO CONTINUE PRESSURIZATION OF THE FLUID AT A SUBSTANTIALLY HIGHER RATIO OF APPLIED FORCE TO THE OUTPUT HYDRAULIC PRESSURE.
Inventors
- 👤 David R Herriott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:34
CPC Classifications
B; B60; B60T; B60T17/00; B60T17/18; B60T17/22; B60T17/226; B60T11/00; B60T11/10; B60T11/16; B60T11/20; B60T11/224
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) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |