| 摘要 |
A water pump seal including a lip-type sealing member restrained in a sealing position to a containing case and engaging the outer periphery of a cylindrical face seal member for the purpose of providing a pressure balance seal by eliminating the communication of water pressure to the rear face of the face seal member. The face seal member is held concentric with a shaft to be received by the seal and restrained from rotation by a spring secured to the face seal member at one end and to the case at its other end. Such manner of rotation restraint and the use of a lip-type sealing member further contribute to increased seal life.
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