Two-circuit fluid pressure control valve

Details Two-circuit fluid pressure control valve Two-circuit fluid pressure control valve

1986-02-28

1987-07-14

Nilson, Robert G.

Fluid handling

Systems

Sequentially closing and opening alternately seating flow...

303 52, B60T 1502

Patent

active

046795944

ABSTRACT:
A dual circuit foot valve for a compressed air braking system has a plunger (38) which acts through a spring (39) on a first piston (6) which carries an exhaust seat for a first double valve controlling the supply of pressure from an input port (27) to a first circuit delivery port (28), the delivered pressure at (28) acting beneath the piston (6) in a sense to cause lapping of the valve and also acting above a second piston (16) which similarly acts as a control piston for a further double valve controlling the supply of pressure from an input port (29) to a second circuit delivery port (30), a further spring 43 being carried within the piston 6 to be engageable with a projection (55) of the second piston (16) following operation of the plunger to act on the second piston to beneficially influence the differential between the two delivered pressures.

REFERENCES:
patent: 3265447 (1966-08-01), Bueler
patent: 3355223 (1967-11-01), Klimek
patent: 3359043 (1967-12-01), Papin

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