US3575192A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vehicle hydraulic system and pressure regulator therefor
Assignee: Bendix Corp
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Filing: 1969-01-27
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Granted: 1971-04-20
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Expires: 1989-01-27
Abstract
Abstract A hydraulic system for a vehicle having a conventional opencenter steering system powered by an engine-driven rotary pump with a valve that enables a small portion of the fluid delivered by the pump to be stored in an accumulator between predetermined pressure limits. The invention visualizes the use of the fluid in the accumulator for such purposes as actuating a power brake booster and/or other devices within the vehicle.
Inventors
- 👤 Stanley I Macduff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:00
CPC Classifications
B; B62; B62D; B62D5/00; B62D5/06; B62D5/07; B60; B60T; B60T13/00; B60T13/10; B60T13/12; B60T13/14; B60T13/148; F; F15; F15B; F15B1/00; F15B1/02; F15B1/027; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2605; Y10T137/2607; Y10T137/2612; Y10T137/2622; Y10T137/2625
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
187 words
In a valve: a housing having a fluid inlet, a pair of fluid outlets, and a bore communicating the inlet with the outlets; one of said outlets being in fluid communication with means for storing fluid under pressure; first valve means slidable in said bore dividing the latter into first and second chambers; said inlet and the other outlet being in fluid communication with said first chamber; said one outlet being in fluid communication with the second chamber; an orifice in said first valve means permitting metered flow of fluid from said first chamber to said second chamber; resilient means yieldably urging said first valve means toward a position terminating fluid communication between said inlet and the other outlet; a third fluid outlet in fluid communication With said second chamber; normally closed second valve means within said housing for controlling flow of fluid between said second chamber and said third outlet independently of said first valve means; and means communicating said fluid storage means with said second valve means for opening the latter when the fluid pressure level in said fluid storage means exceeds a predetermined level.
Claim 2
Dependent Claim
187 words
In a valve: a housing having a fluid inlet, a pair of fluid outlets, and a bore communicating the inlet with the outlets; one of said outlets being in fluid communication with means for storing fluid under pressure; first valve means slidable in said bore dividing the latter into first and second chambers; said inlet and the other outlet being in fluid communication with said first chamber; said one outlet being in fluid communication with the second chamber; an orifice in said first valve means permitting metered flow of fluid from said first chamber to said second chamber; resilient means yieldably urging said first valve means toward a position terminating fluid communication between said inlet and the other outlet; a third fluid outlet in fluid communication With said second chamber; normally closed second valve means within said housing for controlling flow of fluid between said second chamber and said third outlet independently of said first valve means; and means communicating said fluid storage means with said second valve means for opening the latter when the fluid pressure level in said fluid storage means exceeds a predetermined level.
Claim 3
Dependent Claim
148 words
The invention of claim 1; and an elongated compartment within said housing in fluid communication with said second chamber and with said third outlet; said second valve means being disposed within said compartment and including a valve seat circumscribing the latter, a valve member yieldably urged against said seat to terminate fluid communication through said compartment between said second chamber and said third fluid outlet, and a plunger for forcing said valve member from said seat; said plunger dividing said compartment into a first section housing said second valve means and a second section; said communicating means communicating said fluid storage means with said second section whereby an increase in the fluid pressure level in said fluid storage means above a predetermined level operates said plunger to force the valve member from the valve seat to permit fluid communication between said second chamber and said third fluid outlet.
Claim 4
Dependent Claim
24 words
The invention of claim 2; said communicating means being a passage formed within said housing between said one fluid outlet and said second section.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-19 | 1974-10-19 | 1975-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-19 | 1978-10-19 | 1979-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-19 | 1982-10-19 | 1983-04-20 | $7700.00 | Window Closed / Lapsed |