US3572847A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual station interlocking parking brake
Assignee: Ingersoll Rand Co
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Filing: 1969-10-27
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Granted: 1971-03-30
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Expires: 1989-10-27
Abstract
Abstract A brake control for a vehicle with a source of fluid pressure having a pair of actuator valves for directing fluid pressure from the source to the brake to effect its release and a selector valve for selectively directing fluid pressure from the source to one of said actuator means while isolating the other actuator means from said source.
Inventors
- 👤 Robert G Luft
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:52
CPC Classifications
B; B60; B60T; B60T13/00; B60T13/10; B60T13/24; B60T13/26; B60T13/38
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
106 words
In a vehicle having dual control stations, a brake which is operatively connected to prevent movement of the vehicle when applied, and a source of fluid under pressure, the improvement comprising: first and second actuator valves, one of which is located in each station, each actuator valve having a release position in which said fluid pressure is directed to release said brake and an apply position in which fluid pressure is exhausted to apply said brake; and a selector valve for selectively connecting the source of fluid pressure to one of said actuator valves while simultaneously isolating the other of said actuator valves from said source.
Claim 2
Dependent Claim
106 words
In a vehicle having dual control stations, a brake which is operatively connected to prevent movement of the vehicle when applied, and a source of fluid under pressure, the improvement comprising: first and second actuator valves, one of which is located in each station, each actuator valve having a release position in which said fluid pressure is directed to release said brake and an apply position in which fluid pressure is exhausted to apply said brake; and a selector valve for selectively connecting the source of fluid pressure to one of said actuator valves while simultaneously isolating the other of said actuator valves from said source.
Claim 3
Dependent Claim
91 words
In a vehicle according to claim 1, and further comprising: first and second pilot-operated actuator means operatively connected to the first and second actuator valves respectively for moving the associated actuator valve to its apply position in response to receiving a pressure signal; and conduit means extending between the first actuator means and the second actuator valve and between the second actuator means and the first actuator valve, each of said actuator valves being capable of directing a fluid pressure signal through said conduit means when moved to its apply position.
Claim 4
Dependent Claim
29 words
In a vehicle according to claim 2 wherein said actuator valves are movable from their release positions only by said actuator means and by the application of manual force.
Claim 5
Dependent Claim
50 words
In a vehicle according to claim 1, and further comprising shuttle valve means interposed between said actuator valves and said brake for permitting communication between the brake actuator valve to which fluid pressure is directed by said selector valve while isolating the other of said actuator valves from the brake.
Claim 6
Dependent Claim
78 words
A means for controlling the parking brake from either one of two operator stations on a vehicle having a source of fluid pressure, said control means comprising: a pair of actuator valves one of which is located in each station, each actuator valve having a release position and an apply position; and a selector valve for selectively connecting said source to one of said actuator valves while simultaneously isolating the other of said actuator valves from said source.
Claim 7
Dependent Claim
78 words
A means for controlling the parking brake from either one of two operator stations on a vehicle having a source of fluid pressure, said control means comprising: a pair of actuator valves one of which is located in each station, each actuator valve having a release position and an apply position; and a selector valve for selectively connecting said source to one of said actuator valves while simultaneously isolating the other of said actuator valves from said source.
Claim 8
Dependent Claim
78 words
The invention according to claim 5, and further comprising: a pilot-operated actuator means operatively connected to each of said actuator valves for moving the associated actuator valve to its apply position in response to receiving a pressure signal; conduit means extending between each actuator valve and the actuator means associated with the other actuator valve; and each of said actuator valves being capable of directing a pressure signal through said conduit means when moved to its apply position.
Claim 9
Dependent Claim
48 words
The invention according to claim 6, and further comprising check valve means interposed between the actuator valves and the parking brake for permitting communication between the actuator valve to which fluid pressure is directed by the selector valve while isolating the other actuator valve from the parking brake.
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) | 1974-03-29 | 1974-09-28 | 1975-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-29 | 1978-09-28 | 1979-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-29 | 1982-09-28 | 1983-03-30 | $7700.00 | Window Closed / Lapsed |