Pipes and tubular conduits – With closures and plugs – Inflation stem type
Patent
1995-05-30
1996-10-01
Stinson, Frankie L.
Pipes and tubular conduits
With closures and plugs
Inflation stem type
1510405, 1510402, F16L 5510
Patent
active
055603947
ABSTRACT:
A self cleaning plug is positionable within a tube having an internal surface with a defined dimension. The plug is formed of a first rigid member, a compressible member, a bolt, a second rigid member and a cleaning device. The first rigid member has a threaded bore and an external dimension less than the defined dimension of the tube internal surface. The compressible member has a through bore large enough to receive a shank of the bolt. The bolt extends axially through the compressible member and into the threaded bore of the first rigid member. The second rigid member is preferably in the form of a thin disk and is carried on the bolt between the compressible member and a head of the bolt, such that rotation of said bolt into said rigid member will result in axial compression and radial expansion of the compressible member. The cleaning device which is in the form of a wheel or disk and may be an abrasive material or a brush, has an external dimension greater than that of the rigid member and at least as great as the defined dimension so that it will engage the internal surface as the plug is being inserted into the tube. The cleaning device is carried on the plug either at a leading edge of the first rigid member or between the first rigid member and the compressible member.
REFERENCES:
patent: 1122246 (1914-12-01), Beam
patent: 1495008 (1924-05-01), Feagin
patent: 2959224 (1960-11-01), Ault
patent: 4310029 (1982-01-01), Dudek
patent: 4425944 (1984-01-01), Heuckelbach et al.
patent: 4696318 (1987-09-01), Smith
patent: 4762265 (1988-08-01), Baird et al.
patent: 5473787 (1994-06-01), Echols
Hook James F.
JNT Technical Services Inc.
Stinson Frankie L.
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