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:
Jul. 25, 2000
Filed:
Dec. 24, 1998
Applicant:
Inventors:
Shigeaki Takamatsu, Aichi, JP;
Hiroaki Nagaoka, Aichi, JP;
Assignee:
Tokai Rubber Industries, Ltd., Komaki, JP;
Primary Examiner:
Int. Cl.
CPC ...
F16L / ;
U.S. Cl.
CPC ...
138 30 ; 138 31 ;
Abstract
A diaphragm comprising a resin layer for gas shielding, a rubber layer adapted to be adjacent to a gas chamber of an accumulator, and a rubber layer adapted to be adjacent to an oil chamber of an accumulator, the rubber layers formed on opposite sides of the resin layer. The rubber layer adapted to be adjacent to the gas chamber is formed of a mixture of butyl rubber and ethylene-propylene-diene terpolymer. Also provided is an accumulator including the above diaphragm.