Brake pressure reducing valve

Details Brake pressure reducing valve Brake pressure reducing valve

1986-07-22

1987-11-17

Butler, Douglas C.

Fluid-pressure and analogous brake systems

Multiple fluid-receiving devices

Multiple motors

188195, 188349, 303 22R, B60T 818, B60T 1300

Patent

active

047070366

ABSTRACT:
A load conscious brake pressure reducing valve assembly comprises a piston (2A) mounted on a piston rod (2) and movable to control a valve (6) for controlling the connection between an inlet (4) and outlet (3). The valve body (1) is mounted on a sprung part (7) of a vehicle and the piston rod (2) is coupled to an unsprung part (9) by a position sensing lever (10) and springs (32,20) nominal separation of the sprung and unsprung parts the sensing device (8) exerts no force on the piston rod. For greater spacings of the sprung and unsprung parts the spring (20) exert a force on the piston rod which opposes the force of an internal spring (5), and for lesser spacings the spring (32) exert a force on the piston rod which enhances the force of the internal spring. As a result the net spring force acting on the piston always decreases as the separation of the sprung and unsprung parts increases.

REFERENCES:
patent: 3362758 (1968-01-01), Goerke et al.
patent: 3488095 (1970-01-01), Rath
patent: 4040674 (1977-08-01), Marcilland
patent: 4060283 (1977-11-01), Demido et al.
patent: 4209200 (1980-06-01), Hales
patent: 4448457 (1984-05-01), Pressaco

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