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:
Nov. 26, 2002
Filed:
Sep. 05, 2000
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A construction is provided in which a drain hole provided with internal threads in a Mg alloy oil pan is closed with a screw-type plug body constituted by a metal other than Mg and Mg alloy. The plug body has a threaded shank screwed into the drain hole and an enlarged end having a diameter larger than that of the threaded shank . A corrosion preventing plate fitted on the threaded shank via a threaded shank passing hole is disposed between a washer of the enlarged end and a peripheral portion of an opening of the drain hole which corresponds to the washer so that there is provided an electrical insulation between the washer and the peripheral portion of the opening. The corrosion preventing plate has a plurality of annular sealing projections on both sides thereof which are arranged in a concentric fashion about the threaded shank passing hole so as to bite into the peripheral portion of the opening and the washer