Fluid handling – Systems – Multi-way valve unit
Patent
1989-03-20
1989-08-15
Cohan, Alan
Fluid handling
Systems
Multi-way valve unit
251175, F16K 318
Patent
active
048565571
ABSTRACT:
A high pressure, low friction slide valve incorporates a valve body defining parallel spaced internal sealing surfaces and inlet, vent and function ports communicating with an internal valve chamber. A seal carrier is movable within the valve chamber and supports a seal cylinder for rockable motion therein. The seal cylinder has sealing contact with one of the sealing surfaces while a seal rod projecting from a transverse passage of the seal cylinder has sealing contact with the opposite sealing surface. Within the seal rod is positioned a packing member which is of a configuration establishing sealing within the seal cylinder only at a location immediately adjacent the inner end of the seal rod, thus permitting the seal cylinder and seal rod to have low friction metal-to-metal sealing engagement with the parallel sealing surfaces without necessitating the provision of close tolerance seals or O-rings and thus permitting efficient high pressure sealing and low friction movement of the valve mechanism.
REFERENCES:
patent: 3215163 (1905-11-01), Henderson
patent: 3329168 (1967-07-01), Vollmer
patent: 3370611 (1968-02-01), Flint
patent: 3642020 (1972-02-01), Payne
patent: 3917220 (1975-11-01), Gilmore
patent: 4493335 (1985-01-01), Watson
Cohan Alan
Gilmore Valve Company
Jackson James L.
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