Patent attributes
A check valve including a valve member movable with a passage in a housing is disclosed. A biasing means applies a biasing load to the valve member to urge the valve member into engagement with a seating surface within the passage to control fluid flow. An environmental seal member is secured to the valve member by a retainer member. The retainer member includes a lip elastically deflectable by the environmental seal member upon compression and/or deflection of the environmental seal member. When the valve member engages the seating surface, the environmental seal member engages the seating surface to compress and/or deflect the environmental seal member, deflects the lip of the retainer member into engagement with the seating surface. Extrusion of the environmental seal member between the retainer member and the seating surface can be reduced and the engagement between the lip and the seating surface may be a sealing engagement.
