초록 ▼

A fluid pressure energized wear resistant pump valve is provided having a valve body and seal retainer formed of metal which secure a seal insert in assembly therewith. The seal insert incorporates an elastomeric sealing portion having a frusto-conical sealing surface for engagement with a valve sea

A fluid pressure energized wear resistant pump valve is provided having a valve body and seal retainer formed of metal which secure a seal insert in assembly therewith. The seal insert incorporates an elastomeric sealing portion having a frusto-conical sealing surface for engagement with a valve seat of corresponding configuration. An anti-extrusion member is secured in assembly with the elastomeric seal portion and is composed of non-metal material of greater hardness than the hardness of the elastomeric material. The anti-extrusion member forms a frusto-conical sealing surface disposed in contiguous relation with the sealing surface of the elastomeric seal member. The anti-extrusion member further defines a tapered, yieldable peripheral sealing lip which yields responsive to pressure conditions to prevent pressure induced extrusion and damage to the elastomeric sealing member.

대표청구항 ▼

A fluid pressure energized pump valve, comprising: (a) a valve body; (b) a seal retainer element being threadedly secured to said valve body and cooperating therewith to define a circular sel receptacle; (c) a circular elastomeric sealing element being retained within said seal receptacle by said re

A fluid pressure energized pump valve, comprising: (a) a valve body; (b) a seal retainer element being threadedly secured to said valve body and cooperating therewith to define a circular sel receptacle; (c) a circular elastomeric sealing element being retained within said seal receptacle by said retainer element and forming a frusto-conical sealing surface adapted to engage a frusto-conical valve seat of corresponding configuration; and (d) an anti-extrusion member formed of non-metal material of greater hardness than the elastomeric material of said sealing element and being secured in assembly with said sealing element, said anti-extrusion member defining a frusto-conical sealing surface coextensive with said frusto-conical sealing surface of said sealing element for sealing engagement with said frusto-conical valve seat, said anti-extrusion member being located at the downstream portion of said circular elastomeric sealing element and forming a circular yieldable marginal lip at the intersection thereof with said frusto-conical sealing surface of said circular elastomeric sealing element, said circular yieldable marginal lip of said anti-extrusion member yielding radially outwardly responsive to pressure and establishing sealing engagement with said frusto-conical valve seat, providing structural support for said elastomeric sealing element and minimizing extrusion of said elastomeric sealing element.