Washer with elastic water-swellable rubber
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Mar 16, 1993
Grant Date -
N/A
app pub date -
Oct 30, 1991
filing date -
Nov 6, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A washer system comprising: an annular washer having a central opening and an annular packing member which is coaxially arranged with the annular washer, at least a portion of the annular packing member being arranged within the central opening of the annular washer; at least a portion of the outer surface of the annular washer being rust-proofed treated. A substantial portion of a contacting surface between the annular washer and the annular packing member is not rust-proofed treated. The annular packing member is made of an elastic water-swellable rubber. The annular packing member has a portion which extends radially outwardly from a portion of the annular washer defining the central opening, and contacts a portion of a lower substantially flat surface of the annular washer radially outwardly of the annular opening. The annular packing member has a portion extending below a lower substantially flat surface of the annular washer. The annular washer and the annular packing member are adhered together by a vulcanized adhesive.
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