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. 29, 1988
Filed:
Sep. 03, 1987
Applicant:
Inventors:
Kiyoshi Sakayori, Kodaira, JP;
Shinichi Iwasaki, Musashino, JP;
Yozo Ishida, Higashimurayama, JP;
Toshikazu Shinogaya, Kodaira, JP;
Yuzo Ishizuka, Shiki, JP;
Assignee:
Bridgestone Corp., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29C / ; B21D / ;
U.S. Cl.
CPC ...
264275 ; 10 8 / ; 10 8 / ; 264310 ; 2643289 ;
Abstract
A waterproof nut which may be used, for example, inside a water storage tank, is constituted by a metallic nut body having the outer periphery coated with a synthetic resin layer which also covers both the front and rear surfaces of the nut body. The resin layer which covers the rear surface of the nut body includes a cap-shaped portion for accommodating the free end of a bolt which is screwed into the nut body in such a manner that the free end projects from the rear surface of the nut body, whereby water is prevented from entering the nut body.