Control valve assembly
AssigneeAllied-Signal Inc.
InventorsDuane R. Johnson, Robert J. Herbst
Life of this patent
Estimating the term…
Abstract
A valve assembly includes a housing and a valve plunger slidably mounted within the housing, which carries a pair of valve engaging, ringlike elements for engagement with corresponding seats on the plunger. The cross-sectional diameter of one of the ringlike valve elements is substantially greater than the other, and fits on the plunger with clearance to permit it to be deformed and deflected relative to the plunger to assure a proper sealing engagement of the other ringlike element. A collar retains the other ringlike element, and acts against the valve seat to limit movement of the plunger relative to the housing.
Claims18
Valve assembly comprising a housing defining a longitudinal bore therewithin, a valve plunger slidably mounted in said longitudinal bore, a pair of valve engaging elements carried by said valve plunger for engagement with a corresponding pair of valve seats defined on the wall of said bore to control communication between portions of said longitudinal bore, each of said valve engaging elements being a ring of elastomeric material circumscribing said plunger and being received in a corresponding groove circumscribing said plunger, said rings having an inner and outer diameter, the inner diameter of one of said rings before it is installed on the plunger being less than the diameter of its corresponding groove so that the one ring is stretched when it is installed on the plunger and is retained thereon by the resiliency of the one ring, said one ring having a cross sectional area greater than the cross sectional area of the other ring, the distance between said rings along said plunger permitting said one ring to engage its corresponding valve seat before the other ring engages its valve seat, said one ring deforming and/or deflecting relative to said plunger to permit the other ring to engage its seat so that both of said valve engaging elements sealingly engage their corresponding valve seats as said plunger is shifted past a predetermined position in said bore.
Valve assembly comprising a housing defining a longitudinal bore therewithin, a valve plunger slidably mounted in said longitudinal bore, a valve engaging element carried by said valve plunger for engagement with a corresponding valve seat defined on the wall of said bore to control communication between portions of said longitudinal bore, said valve engaging element being a ring of elastomeric material circumscribing said plunger and being received in a corresponding groove circumscribing said plunger, and a circumferentially extending collar having inner and outer circumferential surfaces, said ring having an outer diameter that is greater than the diameter of said inner circumferential surface of the collar, said outer diameter of the ring engaging the inner circumferential surface of the collar so that the elasticity of the ring yieldably retains the collar on the plunger and the collar engages the ring to retain it in its groove in opposition to fluid forces tending to force said ring out of its groove, said collar being secured to the plunger solely by the elasticity of the ring and being otherwise unattached to said plunger.
Dependencies are inferred from the claim text.