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:
Jan. 29, 1991
Filed:
Jul. 13, 1989
Kenjiro Obara, Ibaraki, JP;
Kazuyuki Nakamura, Ibaraki, JP;
Yoshio Murakami, Mito, JP;
Masamitsu Naganuma, Yokohama, JP;
Kazunori Kitamura, Yokohama, JP;
Takao Uchida, Yokohama, JP;
Japan Atomic Energy Research Institute, Tokyo, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
A pair of flanges are fixed to a pipe end of a port of a plasma vacuum vessel and another pipe end to be connected thereto. These flanges each have a ring-shaped knife edge. A copper gasket is interposed between the respective knife edges of the two flanges. A predetermined number of bolts are tightened to fix the flanges to each other. As a result, the knife edges bite into the copper gasket, and a linear sealing load from the knife edges acts on the gasket, thereby sealing and isolating the space inside the port from the outside. The number n of bolts are given by