Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1981-07-10
1983-11-29
Reger, Duane A.
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
60586, 303 92, B60T 800
Patent
active
044177682
ABSTRACT:
A braking oil pressure control device for a hydraulically operated anti-skid brake system comprising a pair of serially aligned first and second cylinder chambers defined in a cylinder body on the opposite sides of a partition wall. The first cylinder chamber is divided by a brake piston on the opposite sides thereof into a first brake chamber communicating with a brake master cylinder and a second brake chamber communicating with a wheel brake such that when the pressure in the first brake chamber is pressurized under the action of the master cylinder, the brake piston is moved to pressurize the second brake chamber for actuation of the wheel brake. A control piston is slidably received in the second cylinder chamber and cooperates with the partition wall to define a control chamber communicating with an anti-skid brake control hydraulic circuit. The control piston is connected with the brake piston such that when the control chamber is pressurized by the anti-skid control hydraulic circuit, the control piston is moved together with the brake piston in the direction of reducing an excessive brake pressure in the second brake chamber. A supplementary oil chamber leading to an oil reservoir is formed in the cylinder body and communicates via the second brake chamber with a first seal cup permitting a unidirectional flow of operating oil from the supplementary chamber to the second brake chamber. A second seal cup is interposed between the first and second brake chambers for permitting a unidirectional flow of operating oil from the first brake chamber to the second brake chamber.
REFERENCES:
patent: 2868338 (1959-01-01), Lucien et al.
patent: 3276207 (1966-10-01), Peeples
patent: 4027924 (1977-06-01), Kondo
Fujii Etsuo
Matsuda Shohei
Miyakawa Yoshitaka
Satoh Makoto
Honda Giken Kogyo Kabushiki Kaisha
Reger Duane A.
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