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:
Aug. 10, 2010
Filed:
Nov. 04, 2009
Takashi Ota, Kikukawa, JP;
Tatsuhiro Arikawa, Kikukawa, JP;
Kuniaki Miyake, Fujisawa, JP;
Kenji Sasaki, Fujisawa, JP;
Shinya Nakaoka, Fujisawa, JP;
Eiji Mizutani, Kariya, JP;
Noriyuki Hosoi, Kariya, JP;
Tomoo Ogura, Kariya, JP;
Takashi Ota, Kikukawa, JP;
Tatsuhiro Arikawa, Kikukawa, JP;
Kuniaki Miyake, Fujisawa, JP;
Kenji Sasaki, Fujisawa, JP;
Shinya Nakaoka, Fujisawa, JP;
Eiji Mizutani, Kariya, JP;
Noriyuki Hosoi, Kariya, JP;
Tomoo Ogura, Kariya, JP;
NOK Corporation, , JP;
Advics Co., Ltd., , JP;
Abstract
To prevent plastic deformation of a bellows due to a pressure difference between inner and outer sides of the bellows in an outside gas type or inside gas type accumulator, a disc-like gasket is held in a floatable state to a surface close to a stay in a bellows cap by a gasket holder, so that, the disc-like gasket moves together with the bellows cap at a steady operation time, the disc-like gasket moves together with the bellows cap to contact with an end surface portion of the stay, thereby closing the liquid chamber at a zero-down time, and the bellow cap moves toward a position where liquid pressure and gas pressure balance while the disc-like gasket keeps contacting with the stay due to a difference of pressure receiving areas in both the surfaces when the liquid in the liquid chamber is thermally expanded at a zero-down time.