Dual-circuit pressure control valve

Details Dual-circuit pressure control valve Dual-circuit pressure control valve

1981-02-05

1984-01-24

Butler, Douglas C.

Fluid-pressure and analogous brake systems

Load control

Responsive to fluid pressure spring

188195, B60T 802, B60T 818

Patent

active

044272391

ABSTRACT:
Dual-circuit brake force control systems are known in which the initial preloading force is changeable dependent on the vehicle load. The initial preloading force is distributed to the control pistons by a lever. Due to manufacturing tolerances and erosion of the individual elements, considerable differences in pressure in both brake circuits may occur. Therefore, according to the instant invention a control lever is provided to directly actuate both control pistons and which is rotatable about an axis perpendicular to the axes of the control pistons and also rotatable about the longitudinal axis of the lever. A holding member shaped like a ball bearing enables the lever to rotate about these two axes. Adjustable stops are provided which cooperate with circular stop surfaces extending from the lever on opposite sides of the longitudinal axis with the center of the stop surfaces being disposed in a plane parallel to the longitudinal axes of the control piston and containing the axes of the control piston.

REFERENCES:
patent: 3731981 (1973-05-01), Bueler
patent: 3904253 (1975-09-01), Riquart
patent: 4101176 (1978-07-01), Carre et al.
patent: 4332423 (1982-06-01), Schopper et al.

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