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A balanced valve in which a hollow cylindrical valve element is slideably supported solely by a pair of O-rings adjacent opposite ends of the valve element. The O-rings loosely engage longitudinally grooved sections which are directly adjacent annular valve seats against which the O-rings engage to

A balanced valve in which a hollow cylindrical valve element is slideably supported solely by a pair of O-rings adjacent opposite ends of the valve element. The O-rings loosely engage longitudinally grooved sections which are directly adjacent annular valve seats against which the O-rings engage to close the valve. When the valve element is moved to open the valve, fluid will flow through both grooved sections. The valve element is moved between open and closed positions by two solenoid coils operating concurrently and is magnetically latched in each position.

대표청구항 ▼

A valve comprising: a valve body having a bore, a fluid outlet passage opening into said bore adjacent one end of said bore, a fluid inlet passage opening into said bore intermediate the ends of said bore, a cylindrical valve element in said bore, means forming a first annular valve seat in said bor

A valve comprising: a valve body having a bore, a fluid outlet passage opening into said bore adjacent one end of said bore, a fluid inlet passage opening into said bore intermediate the ends of said bore, a cylindrical valve element in said bore, means forming a first annular valve seat in said bore and intermediate said inlet and said outlet passages, said bore having a longitudinally grooved section adjacent said seat, a first annular elastomeric seal carried by said valve element and slideable along said grooved section, means on said valve element forming a second annular valve seat at the opposite end of said bore, said valve element having a second longitudinally grooved section adjacent said second seat, a second annular elastomeric seal carried by said valve body, said second seal being slideable along said second grooved section, said grooved sections and said seals forming the sole sliding support for said valve element, and means for selectively moving said valve element in one direction to engage said seals with respective ones of said seats whereby to close said valve and moveable in the opposite direction to remove said seals from engagement with said respective seats whereby to open said valve.