Hydraulic modulator with equal, opposing chambers formed by a pi

Details Hydraulic modulator with equal, opposing chambers formed by a pi Hydraulic modulator with equal, opposing chambers formed by a pi

1991-01-24

1992-09-01

Graham, Matthew C.

Fluid-pressure and analogous brake systems

Speed-controlled

Having a valve system responsive to a wheel lock signal

303116R, 303119SV, 60545, 60567, 60591, B60T 832, F15B 500

Patent

active

051434296

ABSTRACT:
A system for controlling a fluid pressure includes a pressure modulating cylinder unit having a piston and a cylinder housing defining first and second fluid chambers separated by the piston, a cutoff valve unit for isolating the first and second chambers from a pressure source and from each other, and a motor unit for pushing and pulling the piston to vary the fluid pressure in the first chamber. When the system is used for controlling a brake fluid pressure of a vehicle, the first chamber is connected with a wheel cylinder, and the valve unit is arranged to isolate the wheel cylinder and the first and second chambers from a master cylinder.

REFERENCES:
patent: 3549210 (1970-12-01), Birge et al.
patent: 3871497 (1975-03-01), Bessiere
patent: 3953082 (1976-04-01), Smith
patent: 4206605 (1980-06-01), Mehren et al.
patent: 4578951 (1986-04-01), Belart et al.
patent: 4758054 (1988-07-01), Brown
patent: 4815792 (1989-03-01), Troster
patent: 4861116 (1989-08-01), Bernhardt et al.
patent: 4865398 (1989-09-01), Takeuchi et al.
patent: 4898434 (1990-02-01), Kohno et al.

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