Electricity: conductors and insulators – Conduits – cables or conductors – Combined
Patent
1979-07-27
1981-09-01
Envall, Jr., Roy N.
Electricity: conductors and insulators
Conduits, cables or conductors
Combined
174 77R, 174 82, H02G 1500
Patent
active
042873860
ABSTRACT:
This electrical conduit end seal includes a cylindrical walled member having an opening at one end dimensioned to receive the conduit. The end opening terminates in a first partition having at least one aperture through which a cable in the conduit may pass in a friction fit. A second partition is parallel to and spaced apart from the first partition and has at least one corresponding aperture through which the cable may pass in a friction fit. The first and second partitions form, together with the cylinder wall, a sealing chamber. The sealing chamber has first and second openings communicating from the chamber to the exterior of the end seal. In use, the end seal is fastened to the conduit with the cable extending through the partition apertures. A caulking gun or other suitable dispenser is used to inject a curable resinous material or other sealing material through one of the chamber openings. The other chamber opening allows escape of air while the material is filling the chamber. In use, it is preferred to inject a silicone resin through the first opening until resin begins to come out the second opening. The second opening is then blocked and injection continued until the resin is exuded around the apertures through which the cable passes to form a bead, then allowed to cure. The resulting hermetic seal will prevent both moisture and gases from entering the conduit, even under pressure.
REFERENCES:
patent: 1935561 (1933-11-01), Hooley
patent: 2908744 (1959-10-01), Bollmeier
patent: 2962542 (1960-11-01), Witt
patent: 3764728 (1973-10-01), Howie et al.
Burrafato Gary M.
Scahill Steven
Envall Jr. Roy N.
Gregg Edward B.
Higgins Willis E.
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