초록 ▼

A check valve assembly is disclosed for use with a pool or spa plumbing system and includes first and second hub sections connected together by a nut member. An insert member carrying an elastomeric diaphragm is sandwiched between the first and second hub members to permit fluid flow in a first dire

A check valve assembly is disclosed for use with a pool or spa plumbing system and includes first and second hub sections connected together by a nut member. An insert member carrying an elastomeric diaphragm is sandwiched between the first and second hub members to permit fluid flow in a first direction and prevent fluid flow in a second reverse direction. The assembly is designed such that the nut member may be moved longitudinally along one of the hub sections to expose and permit removal of the insert member in a direction transverse to the longitudinal axis of the hub sections. The nut member and insert are configured to cooperate with each other such that the insert may only be mounted in the assembly facing in a predetermined direction.

대표청구항 ▼

A check valve assembly comprising: a first pipe section having a first sealing surface, a second pipe section having a second sealing surface, an insert member having front and rear surfaces engaging said first and second sealing surfaces, respectively, means defining an aperture through said insert

A check valve assembly comprising: a first pipe section having a first sealing surface, a second pipe section having a second sealing surface, an insert member having front and rear surfaces engaging said first and second sealing surfaces, respectively, means defining an aperture through said insert member, a resilient diaphragm member extending across said aperture and including a tab portion and a pair of semi-circular flap portions connected to said tab portion along a pair of hinge portions, said hinge portions being defined by two elongated areas having a substantial reduction in material thickness relative to a thickness of said flap portions, said flap portions each defining upper and lower flap surfaces wherein each of said upper and lower flap surfaces lie in a single plane extending from a location adjacent to said hinge portion to a peripheral edge of a respective flap portion defining a radial outer boundary of said diaphragm member, said diaphragm member allowing fluid flow through said insert member in a first direction and preventing fluid flow through said diaphragm in a second direction, and a nut member extending around said insert member and engaging said first and second pipe sections for holding said front and rear surfaces in contact with said first and second sealing surfaces.