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:
Apr. 30, 2002
Filed:
Jul. 05, 2000
Takeshi Uchida, Yokohama, JP;
Takeyoshi Shimbori, Yokohama, JP;
NKH Spring Co., Ltd., Yokohama, JP;
Abstract
A gas spring apparatus comprises an outer tube, a cylinder held in the outer tube, and a rod having a piston located in the cylinder. The rod is inserted into the cylinder through a sealing portion. The interior of the cylinder is divided in two, a first liquid chamber situated on the side of the sealing portion and a low-pressure gas chamber situated on the side remoter from the sealing portion, by the piston. A space between the inner surface of the outer tube and the outer surface of the cylinder is divided between a high-pressure gas chamber and a second liquid chamber by a metal bellows. A first liquid chamber and a second liquid chamber communicate with each other by liquid communicating portions. A gas is charged in the high-pressure gas chamber at a higher pressure than in the low-pressure gas chamber.