Fluid-pressure and analogous brake systems – Multiple fluid-receiving devices – Multiple motors
Patent
1983-03-17
1984-10-16
Butler, Douglas C.
Fluid-pressure and analogous brake systems
Multiple fluid-receiving devices
Multiple motors
188349, B60T 826
Patent
active
044771223
ABSTRACT:
A hydraulic pressure control valve for use in a dual circuit braking system of an automotive vehicle, and including a plunger slidably received in an elongated bore in a housing with opposite ends thereof being exposed to respective pressure circuits, and two pressure proportioning valve mechanisms being mounted on the housing with the axii thereof being perpendicular to the plunger, each valve mechanism including a stepped piston, an axial passage extending through the piston, a valve seat defined on one end of the passage, and a valve member cooperating with the valve seat. The plunger has on opposite end portions large and small diameter portions interconnected by an inclined surface portions, and a control member is interposed between the plunger and each valve member of the valve mechanism with one end abutting normally with the large diameter portion of the plunger and the other end being connected to the valve member such that when the control member abuts with the small diameter portion of the plunger in response to the axial displacement thereof the control member carries the valve member in the direction separating from the piston thereby preventing pressure proportioning function of the valve mechanism.
REFERENCES:
patent: 3790221 (1974-02-01), Fulmer
patent: 3970347 (1976-07-01), Mizusawa
patent: 4049323 (1977-09-01), Hess
patent: 4252379 (1981-02-01), Falk
Butler Douglas C.
Tokico Ltd.
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