Control valve

Details Control valve Control valve

1985-04-01

1987-09-15

Michalsky, Gerald A.

Fluid handling

Systems

Supply and exhaust

60418, 91513, 137116, F15B 1306

Patent

active

046932739

ABSTRACT:
A control valve for controlling the distribution of pumped hydrodynamic fluid to the trailer brakes of a tractor and trailer combination in response to hydrostatic pressure applied from the tractor braking system has an inlet for pumped fluid, a spool valve operable in response to a control piston to control the flow of pumped fluid to a first working trailer braking circuit through an outlet and to a tank, or reservoir, through an outlet, a flow control valve which provides a passageway communicating with a first flow path for pumped fluid to the spool valve and which is operable in response to pumped fluid pressure to control the flow of pumped fluid to a second working implement circuit through an outlet, and a second flow path for pumped fluid extending between the inlet and spool valve independent from and parallel with the first flow path, so that the spool valve controls the flow of pumped fluid through the second flow path to the fluid outlet leading to the trailer braking circuit.

REFERENCES:
patent: 3225781 (1965-12-01), Kruger
patent: 3455210 (1969-07-01), Allen
patent: 3771424 (1973-11-01), Allen et al.
patent: 3924655 (1975-12-01), Schwerin
patent: 4080994 (1978-03-01), Flascher et al.
patent: 4099541 (1978-07-01), Binkley et al.
patent: 4150690 (1979-04-01), Heiser et al.
patent: 4244278 (1981-01-01), Belart et al.
patent: 4503876 (1985-03-01), Farr

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