Patent ID: 7416383

Claim:
A pump housing assembly which includes a pump casing and a liner, the pump casing including at least two parts which are adapted to be connected together in an assembled position wherein the pump casing includes opposed front and rear sides, the at least two parts of the pump casing when in the assembled position have a common junction region which is disposed within one or more planes which pass through the front and rear sides of the pump casing when in the assembled position, the liner being of one piece and of an elastomer material and which includes annular flanges on each side thereof which are adapted to be clamped between the at least two casing parts in the assembled position, wherein the flanges include sealing portions thereon, the sealing portions being adapted to be received within a cavity formed between the pump casing and a pump end plate assembly, and wherein the sealing portions are generally wedge-shaped, formed integrally with the liner and responsive to pressures produced during operation of the pump.