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:
Feb. 12, 2013
Filed:
Sep. 16, 2008
Shinya Nakaoka, Fujisawa, JP;
Kuniaki Miyake, Fujisawa, JP;
Junichi Nakayama, Fujisawa, JP;
Taisuke Yamada, Fujisawa, JP;
Takeshi Watanabe, Fujisawa, JP;
Tomonari Saito, Fujisawa, JP;
Shinya Nakaoka, Fujisawa, JP;
Kuniaki Miyake, Fujisawa, JP;
Junichi Nakayama, Fujisawa, JP;
Taisuke Yamada, Fujisawa, JP;
Takeshi Watanabe, Fujisawa, JP;
Tomonari Saito, Fujisawa, JP;
Eagle Industry Co., Ltd., , JP;
Abstract
An outer gas type or inner gas type accumulator has a mechanism for reducing a pressure difference generated when liquid in a liquid chamber and gas expand thermally at a zero-down time, the pressure difference between the inside and outside of a bellows is reduced to suppress abnormal deformation of the bellows, a movable plate supported by a spring is provided at the bellows cap side of an oil port, the movable plate is supported by the spring and away from a seal in normal operation, the movable plate is pushed by the bellows cap and contacts with the seal while elastically deforming the spring, in a zero-down state, and when the liquid and the gas expand thermally in the zero-down state, the bellows cap moves to a position where the liquid pressure and the gas pressure balance, while the movable plate keeps contact with the seal.