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. 20, 2003
Filed:
Apr. 23, 2001
Applicant:
Inventors:
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16K 2/500 ;
U.S. Cl.
CPC ...
F16K 2/500 ;
Abstract
A gate valve includes: a valve plate; a valve rod which the valve plate is fixed to and is supported to be able to tilt; a seal bellows and a dust sealing portion; a stopper member; a tilting cam mechanism which converts supplied straight moving force into tilting force, and tilts the valve rod of which the straight movement is restricted at a closed position in the direction where the valve plate seals an aperture; a seal-releasing cam mechanism which tilts the valve rod in the direction to release the sealing of the valve plate; and an air cylinder as an actuator which supplies the straight movement force for the tilting cam mechanism and the seal-releasing cam mechanism.