Patent US5025252A successfully refreshed from Google Patents.
Patent US3779614A successfully refreshed from Google Patents.
US3779614A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vehicle braking systems
Assignee: Girling Ltd
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Filing: 1972-03-31
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Granted: 1973-12-18
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Expires: 1992-03-31
Abstract
Abstract A control valve arrangement particularly for use in a vehicle braking system having fluid pressure brake actuator means and fluid pressure controlled lock actuator means, comprises two separate control valves operated by a single control lever, and a gate which governs movement of the control lever has two parallel legs and two parallel cross-paths intersecting the legs. Mechanical one-way latching means co-ordinate control of the respective valve in such a manner that the lock actuator is rendered operative and inoperative only at predetermined pressure values of the brake actuator means.
Inventors
- 👤 M Hughes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:16
CPC Classifications
B; B60; B60T; B60T13/00; B60T13/10; B60T13/12; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20012; Y10T74/20018; Y10T74/20085
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
162 words
Fluid pressure control valve means comprising two separate control valves for regulating the pressure in separate pressure systems, a common operating lever operatively coupled to the said valves for controlling the same by movements in two mutually transverse directions, a gate constraining movements of said lever, said gate having first and second parallel legs, movement of said lever along either of which varies the operative setting of one said valve, and first and second crosspaths transverse to and intersecting said first and second legs, one of said crosspaths being intermediate the ends of said legs, movement of said lever along either of said crosspaths being operative to vary the operative setting of the other of said valves, and mechanical one-way latching means constructed and arranged that when said lever is at the end of a selected one of said legs which end is nearest the intermediate crosspath said lever is prevented from movement to the other leg except through said intermediate cross-path.
Claim 2
Dependent Claim
162 words
Fluid pressure control valve means comprising two separate control valves for regulating the pressure in separate pressure systems, a common operating lever operatively coupled to the said valves for controlling the same by movements in two mutually transverse directions, a gate constraining movements of said lever, said gate having first and second parallel legs, movement of said lever along either of which varies the operative setting of one said valve, and first and second crosspaths transverse to and intersecting said first and second legs, one of said crosspaths being intermediate the ends of said legs, movement of said lever along either of said crosspaths being operative to vary the operative setting of the other of said valves, and mechanical one-way latching means constructed and arranged that when said lever is at the end of a selected one of said legs which end is nearest the intermediate crosspath said lever is prevented from movement to the other leg except through said intermediate cross-path.
Claim 3
Dependent Claim
42 words
The control valve means of claim 1 including second mechanical one-way latching means constructed and arranged so that when said lever is in said other leg it is prevented from movement into said first leg except through the other of said cross-paths.
Claim 4
Dependent Claim
84 words
Control valve means as claimed in claim 2, in combination with a vehicle braking system comprising first and second pressure paths, a brake actuator in said first path and a lock actuator unit in said second path, said separator control valves being positioned in said first and second pressure path, respectively, whereby said gate and said first and second latching means permit said lock actuator to be applied only at a predetermined high pressure and to be released only at a predetermined lower pressure.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-17 | 1977-06-18 | 1977-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-17 | 1981-06-18 | 1981-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-17 | 1985-06-18 | 1985-12-18 | $7700.00 | Window Closed / Lapsed |