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. 07, 2009
Filed:
Nov. 17, 2005
Hirokazu Ishimaru, Toyota, JP;
Hirokazu Ishimaru, Toyota, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, JP;
Abstract
In a high-pressure tank, an adjacent part of a liner and a protruded part of a cap are provided adjacently to each other, and in respective annular grooves in the protruded part, an O-ring for sealing adjacent portions of the adjacent part and the protruded part is loaded. A backup ring provided in the inside of the adjacent part of the liner has a hardness higher than that of the liner. Therefore, deformation of the adjacent part that would be caused by the respective O-rings is suppressed, and the respective O-rings can be sufficiently compressed, whereby reliable sealing between the liner and the cap can be provided. In addition, when the pressure inside of the high-pressure tank is increased to a high pressure, even if the cap is pushed out toward the outside resulting in the protruded part of the cap being shrinkage-deformed toward the inside in the radial direction due to the stresses, the respective O-rings can maintain the state of sealing between the protruded part and the adjacent part.