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:
Oct. 22, 1996
Filed:
Jun. 07, 1995
Applicant:
Inventors:
Yutaka Tanaka, Yokohama, JP;
Kunitaka Ozawa, Isehara, JP;
Takao Kariya, Hino, JP;
Shunichi Uzawa, Nakamachi, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16K / ;
U.S. Cl.
CPC ...
251157 ; 251193 ;
Abstract
A gate valve device which includes a partition wall having an opening, a valve member movable along the partition wall to open or close the opening, a driving system for moving the valve member, and a pressing mechanism for pressing the valve member toward the partition wall. The pressing mechanism has a pressing member projectable toward and retractable from the valve member, wherein the pressing mechanism presses the valve member against the partition wall when the valve member is in a position closing the opening.