Metal working – Method of mechanical manufacture – Prime mover or fluid pump making
Reexamination Certificate
2008-07-25
2010-11-16
Bryant, David P (Department: 3726)
Metal working
Method of mechanical manufacture
Prime mover or fluid pump making
C029S456000, C029S469500, C277S569000, C277S549000, C277S559000
Reexamination Certificate
active
07832100
ABSTRACT:
A seal assembly and method for the manufacture thereof is provided. The seal assembly provides a dynamic fluid seal between a housing having a bore and a shaft having an outer running surface rotating within the bore. The seal assembly comprises a rigid carrier for supporting the seal assembly within the bore of the housing. A flexible member is mounted to the rigid carrier. The flexible member is formed from an elastomeric material that allows the flexible member to flex during use. A sealing element is retained by the flexible member about the outer running surface. The sealing element is formed from a non-polytetrafluoroethylene bearing grade plastic material having a hardness relatively greater than a hardness of the elastomeric material of the flexible member. The sealing element moves with the flexible member as the flexible member flexes. The sealing element extends along the outer running surface in a plurality of helically wound convolutions.
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Quadrant Engineering Plastic Products, Product and Applications Guide, Copyright 2001Quadrant Engineering Plastic Products, Inc., p. 40.
Hatch Frederick
Toth David M.
Besler Christopher
Bryant David P
Dickinson Wright PLLC
Federal-Mogul World Wide Inc.
Stearns Robert L.
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