Fluid handling – Systems – Multi-way valve unit
Patent
1979-10-09
1982-01-05
Cohan, Alan
Fluid handling
Systems
Multi-way valve unit
13762418, 13762524, F16K 1107
Patent
active
043088929
ABSTRACT:
A rotary valve of generally cylindrical configuration is arranged to drive two piston-type hydraulic motors by distributing fluid under pressure and return pressures to and from a series of motor ports which match the inlet ports of the motors. Fluid at inlet pressure and at return pressure is distributed through a series of axial passageways to a number of distribution ports. The distribution ports, which would be extremely complex to fabricate with usual casting or machining techniques, are formed of a number of series of stacked disks whose output or input openings are controlled by a rotary member having radial openings and axial passageways. The disks are formed with a symmetrical pattern of ports such that when flow is initiated from a given opening an oppositely disposed opening also will initiate flow, thus radially balancing the forces. Valving to the two motors is symmetrical around the center of the housing, thus causing the fluid pressure forces to be essentially balanced end to end as well as radially.
REFERENCES:
patent: 3022738 (1962-02-01), Krute
patent: 3976103 (1976-08-01), Ostic
Cohan Alan
Smith Robert C.
The Bendix Corporation
Thornton William F.
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