Pipes and tubular conduits – With closures and plugs – Inflation stem type
Patent
1993-04-08
1994-03-01
Bryant, III, James E.
Pipes and tubular conduits
With closures and plugs
Inflation stem type
165171, 220234, F16L 5512
Patent
active
052898512
ABSTRACT:
A tube plug for sealing the end of a tube is provided, which includes a cylindrical housing member sized for insertion within the end portion of the tube. The housing member has a longitudinal blind bore comprising a smooth portion communicating with a threaded portion. An eccentric locking ring is mounted on the housing member for locking the inserted housing member against rotation relative to the tube. An insert member having a threaded end portion is received within the threaded portion of the bore. An enlarged portion is positioned to be drawn within the smooth portion of the bore in response to rotation of the insert member threaded end portion in the bore threaded portion. A tapered portion is provided between the end portion and the enlarged portion. The tapered portion is formed separately from the remainder of the insert member in the form of a truncated cone with a threaded bore therethrough for receiving the threaded end portion of the insert member. The enlarged portion has a recess therein for receiving a driving tool and for transmitting torque at levels greater than 450 inch pounds. The tapered portion and the enlarged portion are sized to cause the smooth portion of the bore to expand, thereby providing a seal between the housing member and the tube.
REFERENCES:
patent: 4421137 (1983-12-01), Nusbaumer et al.
patent: 4436117 (1984-03-01), Martin
patent: 4646816 (1987-03-01), Rothstein
patent: 4653540 (1987-03-01), Epstein
patent: 4751944 (1988-06-01), Sinha et al.
Bryant III James E.
JNT Technical Services Inc.
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