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. 29, 2012
Filed:
Aug. 25, 2008
Atsushi Sakai, Sasayama, JP;
Akihito Totsugi, Sanda, JP;
Atsushi Sakai, Sasayama, JP;
Akihito Totsugi, Sanda, JP;
Abstract
To enable efficient and easy attachment of a shutoff operation cover at a proper attaching position relative to two joining flange portions and also to restrict deformation in a leading end portion of a gate plate valve. A shutoff operation cover B is attached to two pipe portionsjointed and fastened together with a fastener. The shutoff operation cover B is capable of surrounding outer peripheries of the two joining flange portionsA,A under a sealed condition, and there is provided a gate plate valvein the form of a thin plate, the valve being insertable and withdrawable for shutting off conduits of the two pipe portions. As the gate plate valveis inserted to a conduit shutting position through a gap S formed between the two joining flange portionsA,A in association with a loosening operation of the fastener, the conduit is shut off between the two joining flange portionsA,A. When the shutoff operation cover B is attached to the two pipe portions, a leading endof the gate plate valvelocated at a conduit opening position is advanced into an annular gapformed on the outer peripheral sides of opposing faces of the two joining flange portionsA,A.