Pipes and tubular conduits – With closures and plugs – Inflation stem type
Patent
1989-09-26
1991-01-08
Hornsby, Harvey C.
Pipes and tubular conduits
With closures and plugs
Inflation stem type
166187, 166192, 165 71, F16L 5510
Patent
active
049827642
ABSTRACT:
A high confidence tube plug for sealing the bore of a tube against fluid flow has an elastomeric sleeve for sealing the tube. An axially aligned hydroscopic disk swells when contacted with water to frictionally grip the tube. The sleeve and the disk are fastened together by a bolt and nut arrangement.
REFERENCES:
patent: 2445273 (1948-07-01), Kennedy
patent: 2449616 (1948-09-01), Pennella
patent: 3797805 (1974-03-01), Nielsen
patent: 4357960 (1982-11-01), Han
patent: 4443019 (1984-04-01), Ishido et al.
patent: 4760868 (1988-08-01), Saxon
Graham Gary K.
Hornsby Harvey C.
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