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:
Dec. 16, 1980
Filed:
Oct. 20, 1978
Hiroshi Inouye, Minorimachi, JP;
Hitachi, Ltd., , JP;
Abstract
A fluid-tight closure apparatus for providing a fluid-tight seal between the inner peripheral surface of the cylindrical bore in an enclosure receiving therein a high-pressure fluid and the outer peripheral surface of an end closure wall held in the cylindrical bore. The apparatus has a pressurizing ring fitted around the outer peripheral surface at the inner end portion of the end closure wall for a small axial displacement. The pressurizing ring is adapted to derive the required sealing pressure from the internal fluid pressure in the enclosure. The apparatus further has a seal ring disposed between the pressurizing ring and the inner peripheral surface of the cylindrical bore and/or between the pressurizing ring and the end closure wall, and a bolt screwed through the end wall member into the pressurizing ring for imparing an initial sealing surface pressure to sealing areas, through the axial displacement of the pressurizing ring toward the end closure wall.