Pipes and tubular conduits – With closures and plugs – Inflation stem type
Patent
1992-08-21
1994-03-15
Bryant, III, James E.
Pipes and tubular conduits
With closures and plugs
Inflation stem type
138 97, 166122, 166135, F16L 5510
Patent
active
052939057
ABSTRACT:
A pipeline plug is disclosed wherein the rear portion of the plug is axially movable relative to the body of the plug and is provided with pipeline engaging drag inducing members. While the plug is propelled by the pipeline fluid flow, the dragging effect maintains the rear portion at its rearmost extreme. When the plug reaches its determined position in the pipeline, the reversal of flow in the pipeline is resisted by the drag means with the resulting shift of the rear portion forwardly of the plug, triggering the locking of the plug in place and subsequent expansion of the seals of the plug, all caused solely by the pressure differential generated in the pipeline to be worked upon.
REFERENCES:
patent: 2973036 (1961-02-01), Brown
patent: 3181614 (1965-05-01), Brown
patent: 3467182 (1969-09-01), Kisling
patent: 3642064 (1972-02-01), Rosenthal
patent: 3942560 (1976-03-01), Deaver
patent: 3943982 (1976-03-01), Lecordier
patent: 3978678 (1976-09-01), Duncan et al.
patent: 3978892 (1976-09-01), Scodino
patent: 4057081 (1977-11-01), Jones
patent: 4077435 (1978-03-01), Van Scoy
patent: 4390043 (1983-06-01), Ward
patent: 4422477 (1983-12-01), Witman et al.
patent: 4465104 (1984-08-01), Wittman et al.
patent: 4494584 (1985-01-01), Rognoni
patent: 4498811 (1985-02-01), Fern et al.
patent: 4612961 (1986-09-01), Vetter
patent: 4708202 (1987-11-01), Sukup et al.
patent: 4804018 (1989-02-01), Carr et al.
patent: 4852391 (1989-08-01), Ruch et al.
patent: 4852614 (1989-08-01), Johansen et al.
patent: 4854384 (1989-08-01), Campbell
patent: 4875615 (1989-10-01), Savard
patent: 4909281 (1990-03-01), Reaux
patent: 4991651 (1991-02-01), Campbell
patent: 5029614 (1991-07-01), Lara et al.
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