Multiple duct underground conduit

Details Multiple duct underground conduit Multiple duct underground conduit

1974-12-18

1976-08-31

Callaghan, Thomas F.

Pipe joints or couplings

With assembly means or feature

Guide and support

61105, 285137R, 285325, 285DIG16, F16L 3900

Patent

active

039777030

ABSTRACT:
Multiple duct underground conduit and method of installing the same which involves plastic tubing and male and female coupling plates which can be field assembled at the trench site to form sections which are then connected to each other in the trench without requiring someone in the trench. One form of the invention uses a wedge lock while the other employs a hook and latch, both forms simply requiring lowering of one section adjacent the other. Concrete may then be poured about the conduit in the trench and the trench covered.

REFERENCES:
patent: 958043 (1910-05-01), Stockley
patent: 1761075 (1930-06-01), Gest
patent: 2195013 (1940-03-01), Rastetter et al.
patent: 2279733 (1942-04-01), Cross
patent: 2324791 (1943-07-01), McLoughlin et al.
patent: 2701147 (1955-02-01), Summerville
patent: 2933428 (1960-04-01), Mueller
patent: 3381977 (1968-05-01), Metzger
patent: 3822903 (1974-07-01), McNeely et al.
patent: 3851898 (1974-12-01), Ihara
patent: 3869000 (1975-03-01), English

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