Lip seal with reinforced backup
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United States of America Patent
Stats
-
Jan 2, 1996
Grant Date -
N/A
app pub date -
Aug 5, 1993
filing date -
Aug 5, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A replaceable sealing member is disclosed which includes a body, lip seal and bonded reinforcement section having a skirt portion and a lip support surface. The skirt portion and lip support restrict elastomeric flow of the body and lip seal portion of the sealing member to prevent extrusion damage. A radially extending flange, from which the skirt portion axially projects, is bonded to the body and has an abutment surface on one side for abutment against a shoulder in a metallic support, such as in a mud pump piston hub, for limiting axial movement of the replaceable sealing member.
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