High confidence tube plug

Details High confidence tube plug High confidence tube plug

1987-09-21

1988-08-02

Bryant, III, James E.

Pipes and tubular conduits

With closures and plugs

Inflation stem type

165 71, F16L 5510

Patent

active

047608684

ABSTRACT:
A tube plug for stopping the bore of a condensor tube or like conduit. The plug device includes a shoulder bolt having a flange at one end and a threaded shaft at the other. An enlarged shank portion extends outwardly a distance from the flange and terminates at a shoulder region. A resilient sleeve of an elastomeric material is positioned on the enlarged shank, bearing against the flange at one end, with the opposite sleeve end spaced outwardly from the bolt shoulder region. Mechanical gripper elements are positioned on the bolt and are expanded by movement of a nut along the threaded shaft. A washer positioned between the resilient sleeve and the mechanical gripper elements transmits an axial compressive force to the resilient sleeve to create first and second fluid seals around the sleeve and around the bolt shank respectively. The washer stops at the shoulder region to permit additional torquing of the mechanical gripping elements independent of the resilient sleeve.

REFERENCES:
patent: 2107315 (1938-02-01), Wainwright
patent: 2375995 (1945-05-01), Kaeser
patent: 2855003 (1958-10-01), Thaxton
patent: 2870794 (1959-01-01), Thaxton
patent: 2886067 (1957-07-01), Maxwell et al.
patent: 3021927 (1962-02-01), McKee
patent: 3323551 (1967-06-01), Bell et al.
patent: 4381800 (1983-05-01), Leslie
patent: 4385643 (1983-05-01), Noe
patent: 4474216 (1984-10-01), Noe
patent: 4600036 (1986-07-01), Noe

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