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:
May. 06, 1997
Filed:
Sep. 15, 1994
Yoshinobu Nakamura, Tokyo, JP;
Yuzo Hayashi, Tokyo, JP;
Irie Koken Co., Ltd., Tokyo, JP;
Abstract
A non-sliding vacuum gate valve has a valve housing with a valve opening therethrough which is opened and closed by a gate valve body moved by a valve rod. The valve rod moves with linear and tilting movement so that the valve body tilts against the valve seat surrounding the valve opening. The valve rod is moved linearly by cylinder rods extending from a pair of cylinders attached to the valve housing on either side of the valve rod. A cam body having an angular cam slot is attached to a connecting member which spans between the end portions of the cylinder rods above the valve rod. The valve rod has a cam follower engaging the angular cam slot to provide the tilting movement of the valve rod and valve body responsive to the alternate reciprocal vertical movement of the cylinder rods, to open and close the valve opening.