Unitized grit seal with removable thrust bumper
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United States of America Patent
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Feb 2, 1993
Grant Date -
N/A
app pub date -
Feb 6, 1991
filing date -
Feb 6, 1991
priority date (Note) -
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status (Latency Note)
Importance
Abstract
A unitized, fluid seal assembly for heavy duty applications. The seal assembly includes a primary seal unit, an annular wear sleeve, and a separately formed thrust bumper made from a stiff but resilient, high temperature resistant, lubricous plastic material. The thrust bumper has a body with opposed, tapered surfaces meeting to define a narrow band that contacts the radial end face of a radial flange on the wear sleeve or the primary seal casing. The primary seal unit includes an elastomeric seal body with primary and excluder lips, and the wear sleeve includes an additional excluder lip contacting a portion of the primary seal casing.
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