The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 16, 1993
Filed:
Oct. 30, 1991
Takuo Fukushima, Tokyo, JP;
Isamu Ichizuka, Tokyo, JP;
Hiroshi Inoue, Tokyo, JP;
Tokio Ueno, Tokyo, JP;
Asahi Denka Kogyo Kabushiki Kaisha, Tokyo, JP;
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.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile