Fluid handling – Systems – Multi-way valve unit
Patent
1993-01-06
1994-07-05
Michalsky, Gerald A.
Fluid handling
Systems
Multi-way valve unit
13762568, 251325, 251900, F16K 1107
Patent
active
053258916
ABSTRACT:
A hydraulic valve wherein the at least partially cylindrical internal surface of a cylinder or the at least partially cylindrical external surface of a piston in the cylinder is formed with a slot-shaped circumferentially extending outlet communicating with a plenum chamber. The other surface is formed with a circumferentially extending groove for a portion of a one-piece or composite sealing ring. The piston is movable in the cylinder between at least one first position in which the ring sealingly engages the slotted surface at one side of the outlet and at least one second position in which the ring sealingly engages the slotted surface at the other side of the outlet. That portion of the slotted surface which is adjacent the outlet is rounded, and that portion of the grooved surface which is adjacent the groove is also rounded. The ring seals the outlet from a discharge opening in one of its positions or it seals the outlet from a first discharge opening in one position and from a second discharge opening in the other position with reference to the cylinder.
REFERENCES:
patent: 2961001 (1960-11-01), Pippenger
patent: 3140728 (1964-07-01), Webb
patent: 3744523 (1973-07-01), Hill
patent: 3819152 (1974-06-01), Clippard
patent: 3949645 (1976-04-01), Masclet
patent: 3996965 (1976-12-01), Peters
patent: 4524803 (1985-06-01), Stoll et al.
Ecker Maschinenbau GmbH
Michalsky Gerald A.
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