Pipes and tubular conduits – With closures and plugs – Inflation stem type
Patent
1983-10-25
1984-10-02
Bryant, III, James E.
Pipes and tubular conduits
With closures and plugs
Inflation stem type
138 90, F16L 5510
Patent
active
044742169
ABSTRACT:
The mechanical seal plug comprises a body having a longitudinal axis and being centrally bored and threaded to receive a threaded nosepiece therein. An end of the nosepiece, i.e., in the shank end thereof, has a recess, of hexagonal configuration, to receive the working end of a hexagonal wrench. The nosepiece has a reduced diameter portion, the same being a portion of the shank thereof, which has a flat, circumferential shoulder. The body also has a flat, circumferential surface, normal thereto, which confronts the shoulder. An elastomeric seal is disposed between the confronting shoulder and normal surface so that, upon the shank of the nosepiece being threadedly turned, to compress the seal, the latter expands its outside diameter to effect a fluid-sealing engagement with the inner surface of a tube into which the plug shall have been inserted. Additionally, a plurality of jaws are independently engaged with the body, and constrained thereabout, and are movable relative thereto to grip such inner surface of such tube. The body has a ramp surface, upon which the jaws move under the urging of a nut threadedly engaged with the body, to radiate outwardly to effect the aforesaid grip.
REFERENCES:
patent: 2855003 (1958-10-01), Thaxton
patent: 3107696 (1963-10-01), Ver Nooy
patent: 3842612 (1974-10-01), Arnold
patent: 3933180 (1976-01-01), Carter
patent: 4381800 (1983-05-01), Leslie
patent: 4385643 (1983-05-01), Noe
Bryant III James E.
Murphy Bernard J.
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