Hydraulic and earth engineering – Subterranean or submarine pipe or cable laying – retrieving,... – Repair – replacement – or improvement
Patent
1980-05-12
1982-03-09
Callaghan, Thomas F.
Hydraulic and earth engineering
Subterranean or submarine pipe or cable laying, retrieving,...
Repair, replacement, or improvement
285242, 285331, 285404, F16L 102
Patent
active
043186394
ABSTRACT:
A connector fitting, for use in the installation of underground plastic pipes, for threaded engagement into a generally standard fitting conventionally used to install underground metal pipes in circumstances where it is desirable to permit soil to flow into the interior chamber of the pipe as said pipe is being pulled into its underground installed position. A main sleeve portion of the plastic pipe connector is exteriorly screwthreaded along a front end portion for threaded engagement within an annular tube portion of the metal pipe connector, and a pair of relatively short sleeves of predetermined differing diameters are fixed as by welding relative to respective inner and outer rear end surfaces of the main sleeve portion. Rearwardly extended portions of the short sleeves define an annular pocket sized to receive a leading end of the plastic pipe. A plurality of circumferentially spaced apart screws are radially engaged through the short sleeves and the plastic pipe lead end, engaged in the annular pocket.
REFERENCES:
patent: 621282 (1899-03-01), Pugh
patent: 679399 (1901-07-01), Smith et al.
patent: 910885 (1909-01-01), Waitz
patent: 1831856 (1931-11-01), Fullman
patent: 3514132 (1970-05-01), Peabody
patent: 3589135 (1971-06-01), Ede
patent: 4117895 (1978-10-01), Ward et al.
Callaghan Thomas F.
Wilson Alfred E.
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