US 4,856,557 AGranted

Sliding metal seal valve mechanism

AssigneeGilmore Valve Co., Ltd.

InventorRichard R. Watson

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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.

Claims20

Dependent claims

A high pressure, low friction slide valve mechanism, comprising:

(a) a valve body forming a valve chamber and having spaced parallel sealing surface defined within said valve chamber, said valve body further defining flow passages in communication with said valve chamber;
(b) a seal carrier being in linearly movable relation with said valve body and having a portion thereof being linearly movable within said valve chamber;
(c) a seal cylinder being supported for rockable movement by said seal carrier and forming a transverse passage extending therethrough and having a sealing portion at one end thereof being disposed in sealing engagement with one of said sealing surfaces and located for registry with one of said flow passages;
(d) a seal rod being supported within said transverse passage and having an end surface thereof disposed in sealing engagement with the other of said sealing surfaces and located for registry with another of said flow passages;
and
(e) a seal packing being located within said transverse passage and having engagement with the opposite end of said seal rod, said seal packing establishing a seal within transverse passage and transmitting pressure induced force to said opposite end of said seal rod.

3 more elements

A high pressure, low friction slide valve mechanism, comprising:

(a) valve body means forming a valve chamber and having supply, vent and function passages in communication with said valve chamber, said valve body means further defining seal plate receptacle means;
(b) a pair of seal plates being received in sealed relation by said seal plate receptacle means and having planar sealing surfaces disposed in spaced parallel relation;
(c) a seal carrier being movably disposed within said valve body means and having a portion thereof positioned for reciprocatory movement between said planar sealing surfaces;
(d) means for imparting reciprocatory movement to said seal carrier;
(e) a seal cylinder being supported for rockable movement by said seal carrier and having a passage extending therethrough forming a packing chamber therein, said seal cylinder also forming a sealing surface about said passage which is disposed in sealing engagement with one of said planar sealing surfaces;
(f) a seal rod extending into said passage of said seal cylinder and having a planar end portion thereof disposed in sealing engagement with the other of said planar sealing surfaces;
and
(g) a seal packing composed of elastomeric material being disposed within said packing chamber with one end thereof in engagement with said seal rod, said seal packing being configured to establish a seal within said passage at a location immediately adjacent said seal rod.

5 more elements

Dependencies are inferred from the claim text.