US3843213A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vehicle braking system
Assignee: Girling Ltd
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Filing: 1973-01-16
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Granted: 1974-10-22
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Expires: 1993-01-16
Abstract
Abstract A dual hydraulic vehicle braking system having two separate pressure circuits comprises a pair of load-conscious brakingpressure regulating valves respectively connected to the separate circuits, a transmission linkage mechanically connecting the valves, and an arrangement for sensing vehicle loading and for applying a force to the transmission linkage in dependence upon the sensed vehicle loading. The transmission linkage transmits the force to the valves, the force being divided between the valves when both circuits are operative and being transmitted wholly to only one of the valves if the circuit connected to the other valve fails.
Inventors
- 👤 D Schroder
- 👤 W Hess
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:15
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/18; B60T8/1812; B60T11/00; B60T11/10; B60T11/24; B60T8/1837; B60T8/185; B60T8/1881
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
119 words
A dual hydraulic vehicle braking system having two separate pressure circuits, comprising a pair of load-conscious braking pressure regulating valves respectively connected to said separate circuits, a transmission linkage having a mechanical connection with both of said regulating valves, and means for sensing vehicle loading and for applying a force to the transmission linkage at a fixed point thereon in dependence upon said vehicle loading, said transmission linkage transmitting said force to the valves, wherein said linkage is operative to divide said force between said valves when both circuits are operative and to transmit substantially the whole of said force to one of said valves in response to failure of said circuits connected to the other of said valves.
Claim 2
Dependent Claim
119 words
A dual hydraulic vehicle braking system having two separate pressure circuits, comprising a pair of load-conscious braking pressure regulating valves respectively connected to said separate circuits, a transmission linkage having a mechanical connection with both of said regulating valves, and means for sensing vehicle loading and for applying a force to the transmission linkage at a fixed point thereon in dependence upon said vehicle loading, said transmission linkage transmitting said force to the valves, wherein said linkage is operative to divide said force between said valves when both circuits are operative and to transmit substantially the whole of said force to one of said valves in response to failure of said circuits connected to the other of said valves.
Claim 3
Dependent Claim
53 words
A braking system according to claim 1, wherein said transmission linkage comprises a lever arranged to pivot about a pivot axis, and wherein said valves are arranged adjacent said lever, one on each side of said lever and one on each side of the said pivot axis equidistantly spaced from said pivot axis.
Claim 4
Dependent Claim
20 words
A braking system according to claim 2, comprising adjusting means for eliminating lost motion between said lever and said valves.
Claim 5
Dependent Claim
65 words
A braking system according to claim 1, wherein said transmission linkage comprises a torsion bar, a pair of spaced levers of equal length carried by said torsion bar and extending laterally of said bar and engaging respective valves, and an arm extending laterally of said bar to which said force is applied, said torsion bar transmitting the resultant couple to said valves through said levers.
Claim 6
Dependent Claim
26 words
A braking system according to claim 4, wherein at least one of said levers is adjustable to eliminate lost motion between said levers and said valves.
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) | 1977-10-21 | 1978-04-22 | 1978-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-21 | 1982-04-22 | 1982-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-21 | 1986-04-22 | 1986-10-22 | $7700.00 | Window Closed / Lapsed |