Method of shutting off conduit and pipe conduit shutoff apparatus
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
May 29, 2012
Grant Date -
Jul 2, 2009
app pub date -
Aug 25, 2008
filing date -
Dec 28, 2007
priority date (Note) -
In Force
status (Latency Note)
Importance
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 portions 2, 3 jointed and fastened together with a fastener 5. The shutoff operation cover B is capable of surrounding outer peripheries of the two joining flange portions 2A, 3A under a sealed condition, and there is provided a gate plate valve 10 in the form of a thin plate, the valve being insertable and withdrawable for shutting off conduits of the two pipe portions 2, 3. As the gate plate valve 10 is inserted to a conduit shutting position through a gap S formed between the two joining flange portions 2A, 3A in association with a loosening operation of the fastener 5, the conduit is shut off between the two joining flange portions 2A, 3A. When the shutoff operation cover B is attached to the two pipe portions 2, 3, a leading end 10b of the gate plate valve 10 located at a conduit opening position is advanced into an annular gap 26 formed on the outer peripheral sides of opposing faces of the two joining flange portions 2A, 3A.
First Claim
Other Claims data not available
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
- 2 Citation Count
- F16L Class
- 4.98 % this patent is cited more than
- 13 Age
