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. 04, 2014
Filed:
Jan. 31, 2013
Hitachi, Ltd., Tokyo, JP;
Satoshi Usui, Hitachinaka, JP;
Shingo Tamura, Hitachinaka, JP;
Katsumi Miyazaki, Hitachinaka, JP;
Sunao Takahashi, Hitachinaka, JP;
Masayuki Suganami, Iwaki, JP;
Minoru Hashida, Hitachinaka, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A mechanism for reducing pressure pulsation includes a pair of metal dampers formed by joining two disk-shaped metal diaphragms over an entire circumference and forming a hermetically sealed space inside a joined portion. Gas is sealed in the aforementioned hermetically sealed space of the damper, and a pair of pressing members give pressing forces to both outer surfaces of the aforementioned metal dampers at a position at an inner diameter side from the joined portion. The mechanism is unitized, with the pair of pressing members being connected in a state in which they sandwich the metal damper.