US3910646A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electro-pneumatic air brake valve and system compatible with a skid control system
Assignee: Echlin Inc
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Filing: 1974-12-26
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Granted: 1975-10-07
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Expires: 1994-12-26
Abstract
Abstract A vehicle brake actuation system is disclosed containing fluid pressure to operate brake actuators for effectively combining an electro-penumatic relay system to function with a skid control system. A first valve is connected in the system for releasing a first impulse of fluid pressure from a first container. A second valve is connected to receive the first impulse from the first container, a second pressure impulse from a second container and to release a third pressure impulse from the second container to the actuators. A first sensor senses fluid pressure between the first and second valves and produces a first signal in proportion thereto. A second sensor senses fluid pressure between the second valve and the actuators and produces a second signal in proportion thereto. A first logic circuit receives and compares the first and second signals for discriminately controlling communication of the first, second and third impulses with the second valve. A second or skid control logic circuit is operable to override the first logic circuit to discriminately interrupt communication of the first impulse with the second valve. The second valve has a first port for receiving the first impulse. A second port is connected to receive the second impulse. A first solenoid in the first port is normally open and is operable to close for interrupting the first impulse. A second solenoid is in the second port and is normally closed and operable to open for admitting the second impulse to the valve.
Inventors
- 👤 Arthur R Grix
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:35
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/17; B60T8/1701; B60T8/1708; B60T8/32; B60T8/34; B60T8/36; B60T8/361
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
211 words
In a vehicle brake actuation system having contained fluid pressure and brake actuators operated by fluid pressure; a first container of fluid pressure; first valve means adjacent the first container connected for releasing a first impulse of fluid pressure from the first container; a second container of fluid pressure; second valve means adjacent the second container connected for receiving the first impulse, for receiving a second impulse from the seconD container and for releasing a third impulse of fluid pressure from the second container; fluid conduit means interconnecting the first and second valve means; fluid conduit means connected to the second valve means to communicate the third impulse to some of the brake actuators; first sensor means connected for sensing fluid pressure between the first and second valve means and for producing a first signal proportional thereto; second sensor means connected for sensing fluid pressure between the second valve means and some of the brake actuators and for producing a second signal proportional thereto; first logic means connected for receiving and comparing the first and second signals for discriminately controlling communication of the first, second and third impulses with the second valve means; and second logic means connected for discriminately interrupting communication of the first impulse with the second valve means.
Claim 2
Dependent Claim
211 words
In a vehicle brake actuation system having contained fluid pressure and brake actuators operated by fluid pressure; a first container of fluid pressure; first valve means adjacent the first container connected for releasing a first impulse of fluid pressure from the first container; a second container of fluid pressure; second valve means adjacent the second container connected for receiving the first impulse, for receiving a second impulse from the seconD container and for releasing a third impulse of fluid pressure from the second container; fluid conduit means interconnecting the first and second valve means; fluid conduit means connected to the second valve means to communicate the third impulse to some of the brake actuators; first sensor means connected for sensing fluid pressure between the first and second valve means and for producing a first signal proportional thereto; second sensor means connected for sensing fluid pressure between the second valve means and some of the brake actuators and for producing a second signal proportional thereto; first logic means connected for receiving and comparing the first and second signals for discriminately controlling communication of the first, second and third impulses with the second valve means; and second logic means connected for discriminately interrupting communication of the first impulse with the second valve means.
Claim 3
Dependent Claim
30 words
The system of claim 1, wherein the second valve means comprises: first solenoid means connected for interrupting the first impulse; and second solenoid means connected for interrupting the second impulse.
Claim 4
Dependent Claim
92 words
The system of claim 1 wherein the second valve means comprises: first passage means formed in the valve for permitting fluid pressure to enter the valve and communicate therewith; means in the first passage means normally opening the first passage and operable under preselected conditions to close the first passage for interrupting fluid pressure communication therethrough; second passage means formed in the valve; and means in the second passage means normally closing the second passage and operable under preselected conditions to open the second passage for permitting fluid pressure to communicate therethrough.
Claim 5
Dependent Claim
154 words
In a vehicle brake actuation system having contained fluid pressure and brake actuators operated by fluid pressure: a first valve; a second valve; means connected for communicating fluid pressure from the first valve to the second valve; other means connected for communicating fluid pressure from the second valve to some of the actuators; first sensor means connected for sensing fluid pressure between the first and second valves and for producing a first signal in proportion to the pressure sensed; second sensor means connected for sensing fluid pressure between the second valve and some of the actuators and for producing a second signal in proportion to the pressure sensed; first logic means connected for receiving the first and second signals and for discriminately controlling communication of fluid pressure between the second valve and some of the actuators; and second logic means connected for discriminately interrupting the fluid pressure communicated between the first and second valves.
Claim 6
Dependent Claim
154 words
In a vehicle brake actuation system having contained fluid pressure and brake actuators operated by fluid pressure: a first valve; a second valve; means connected for communicating fluid pressure from the first valve to the second valve; other means connected for communicating fluid pressure from the second valve to some of the actuators; first sensor means connected for sensing fluid pressure between the first and second valves and for producing a first signal in proportion to the pressure sensed; second sensor means connected for sensing fluid pressure between the second valve and some of the actuators and for producing a second signal in proportion to the pressure sensed; first logic means connected for receiving the first and second signals and for discriminately controlling communication of fluid pressure between the second valve and some of the actuators; and second logic means connected for discriminately interrupting the fluid pressure communicated between the first and second valves.
Claim 7
Dependent Claim
25 words
The system of claim 4, and further including: first solenoid means in the second valve means; and second solenoid means in the second valve means.
Claim 8
Dependent Claim
158 words
The system of claim 4, and further including: first solenoid means in the second valve means; second solenoid means in the second valve means; the first logic means is connected to the first and second sensor means and to the first and second solenoid means for actuating the second solenoid to communicate the fluid pressure from the second valve to some of the actuators when the second sensor means senses pressure lower than the pressure sensed by the first sensor means and for interrupting communication of the fluid pressure from the second valve to some of the actuators when the second sensor senses pressure at least as high as the pressure sensed by the first sensor; and the second logic means is connected to determine impending skid conditions at the vehicle wheels and to actuate the first solenoid to interrupt communication of the fluid pressure between the first and the second valve when the skid conditions are determined.
Claim 9
Dependent Claim
58 words
The system of claim 6, wherein: the second logic means is interconnected with the first logic means and with the first solenoid to override actuation of the second solenoid and to actuate the first solenoid to interrupt the first impulse when the skid conditions are determined without regard to the pressure sensed by the first and second sensors.
Claim 10
Dependent Claim
126 words
The system of claim 4, wherein the second valve means comprises: a piston chamber formed in the valve; piston means operable for reciprocating in the chamber in response to fluid pressure acting thereon; first passage means formed in the valve for permitting fluid pressure to enter the valve and communicate with the piston; first solenoid means reciprocable in the first passage means normally opening the first passage and operable under preselected conditions to close the first passage for interrupting fluid pressure communication with the piston; second passage means formed in the valve; and second solenoid means reciprocable in the second passage means normally closing the second passage and operable under preselected conditions to open the second passage for permitting fluid pressure to communicate with the piston.
Claim 11
Dependent Claim
71 words
The system of claim 7, wherein; a first impulse of fluid pressure is released from a first contained fluid pressure source and communicated to the second valve; a second impulse of fluid pressure is released from a second contained fluid pressure source and communicated to the second valve; and a third impulse of fluid pressure is released from the second contained fluid pressure source and communicated to some of the actuators.
Claim 12
Dependent Claim
160 words
The system of claim 9, wherein the second valve means comprises: a piston chamber formed in the valve; piston means operable for reciprocating in the chamber in response to fluid pressure acting thereon; first passage means formed in the valve for permitting fluid pressure from the first source to enter the valve and communicate with the piston; the first solenoid is reciprocable in the first passage means normally opening the first passage and operable under preselected conditions to close the first passage for interrupting communication of the first impulse between the first source and the piston; second passage means formed in the valve for permitting fluid pressure from the second source to enter the valve and communicate with the piston; and the second solenoid is reciprocable in the second passage means normally closing the second passage and operable under preselected conditions to open the second passage for permitting communication of the second impulse between the second source and the piston.
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) | 1978-10-06 | 1979-04-07 | 1979-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-06 | 1983-04-07 | 1983-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-06 | 1987-04-07 | 1987-10-07 | $7700.00 | Window Closed / Lapsed |