Pipe joints or couplings – Essential catch – With manipulator
Patent
1998-03-16
1999-09-21
Arola, Dave W.
Pipe joints or couplings
Essential catch
With manipulator
285320, 285369, 285423, 285903, 285921, F16L 3718
Patent
active
059543736
ABSTRACT:
A coupler apparatus for use with ducts is used on a multi-strand post-tensioning system. The coupler includes a tubular body with an interior passageway between a first open end and a second open end. A shoulder is formed within the tubular body between the open ends. A seal is connected to the shoulder so as to form a liquid-tight seal with a duct received within one of the open ends. A compression device is hingedly connected to the tubular body for urging the duct into compressive contact with the seal. The compression device has a portion extending exterior of the tubular body. The compression device includes an arm with an end hingedly connected to the tubular body and having an abutment surface adjacent the end. The arm is movable between a first position extending outwardly of an exterior of the tubular body and a second position aligned with an exterior surface of the tubular body. A latching member is connected to an opposite end of the arm to affixing the arm in the second position. The abutment surface of the arm serves to push a corrugation of the duct against the seal and against the shoulder so as to form a liquid-tight seal between the duct and the interior of the coupler.
REFERENCES:
patent: 3976313 (1976-08-01), Lauffenburger et al.
patent: 4462654 (1984-07-01), Aiello
patent: 4519635 (1985-05-01), McMath
patent: 5330235 (1994-07-01), Wagner et al.
patent: 5395140 (1995-03-01), Wiethorn
patent: 5474335 (1995-12-01), Sorkin
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