Method of constructing a low torque shaft seal

Details Method of constructing a low torque shaft seal Method of constructing a low torque shaft seal

2011-06-14

2011-06-14

Lee, Edmund H. (Department: 1744)

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

To produce composite, plural part or multilayered article

C264S261000, C264S275000, C264S273000, C264S229000, C264S231000, C264S346000, C264S236000, C264S237000, C264S347000, C264SDIG067, C425SDIG047

Reexamination Certificate

active

07959840

ABSTRACT:
A method of constructing a shaft seal assembly includes attaching a PTFE seal element to an outer metal case and disposing a bore of the PTFE seal element onto a mandrel. Then, heating the PTFE seal element while on the mandrel. Further, cooling the PTFE seal element while on the mandrel and, removing the shaft seal assembly from the mandrel. The resulting seal element provides a reliable seal against a running surface of a shaft in use, while at the same time producing low running torque against the running surface of the shaft. Further, a minimal axial push force is required to install the shaft seal assembly onto the shaft, thereby reducing the potential of damage to the seal element or inversion of the seal element during installation.

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