Washer with elastic water-swellable rubber

Details Washer with elastic water-swellable rubber Washer with elastic water-swellable rubber

1991-10-30

1993-03-16

Wilson, Neill R.

Expanded, threaded, driven, headed, tool-deformed, or locked-thr

Washer structure

Sealing

411369, 411902, 285925, 277DIG6, F16B 3300, F16B 4302

Patent

active

051939606

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.

REFERENCES:
patent: 2445273 (1948-07-01), Kennedy
patent: 3168321 (1965-02-01), Glicksman
patent: 3606357 (1971-09-01), Yonkers
patent: 3670618 (1972-06-01), Jellison
patent: 3915460 (1975-10-01), Kramer
patent: 4712802 (1987-12-01), Hewison et al.
patent: 5096206 (1992-03-01), Andre et al.

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