Pipe joints or couplings – Connector for conduit housing electromagnetic line: – Having box and connector
Patent
1978-08-17
1981-02-24
Frazier, Roy D.
Pipe joints or couplings
Connector for conduit housing electromagnetic line:
Having box and connector
285165, 285302, 285412, E03C 100, F16L 500
Patent
active
042523486
ABSTRACT:
The pipe joint has a central bore at one end to receive one of the pipes to be connected via an elastic packing, another central bore at the other end to receive the other pipe and a flange to be secured to the building portion via an elastic packing in an air-tight manner to seal the through-hole.
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patent: 1688921 (1928-10-01), Dows
patent: 2367700 (1945-01-01), Thompson et al.
patent: 3048946 (1962-08-01), Hawk et al.
patent: 3454248 (1969-07-01), Bartosek et al.
patent: 3550886 (1970-12-01), Cave
patent: 3695642 (1972-10-01), DeWoody
Frazier Roy D.
Lavine Irvin A.
Pietruszka Carl F.
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