Four-way directional control valve

Details Four-way directional control valve Four-way directional control valve

1999-12-20

2000-11-28

Fox, John

Fluid handling

Systems

Multi-way valve unit

251 3001, F16K 11044

Patent

active

061521787

ABSTRACT:
In a four-way directional control valve of simplified construction and reduced manufacturing costs, first and second hollow cylindrical valve elements are arranged coaxially. Adjacent to opposite ends of the valve elements, first and second valve seats and first and second valve closure elements are provided. First and second pressure-regulating chambers are arranged between separator walls of the valve elements and first and second partition walls associated to the first and second valve seats. A pilot valve can be switched between switching positions for introducing high-pressure fluid originating from a first pipe into the first or second pressure-regulating chamber via a common high-pressure passage, a high pressure introducing hole and two pilot holes, respectively, associated to the pressure-regulating chambers. The control valve can be switched into a state where the first pipe communicates with the fourth and the second pipe communicates with the third pipe and to another state where the first pipe communicates with the third pipe and the second pipe communicates with the fourth pipe.

REFERENCES:
patent: 4492252 (1985-01-01), Kanai
patent: 5152265 (1992-10-01), Hummel et al.

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