Conduit system with expansion coupling and combined spacer and s

Details Conduit system with expansion coupling and combined spacer and s Conduit system with expansion coupling and combined spacer and s

1978-03-08

1980-09-09

Arola, Dave W.

Pipe joints or couplings

With casing, lining or protector

Insulated

285 93, 285110, 285138, 285187, 285373, 285381, 285423, 285DIG7, F16L 1112

Patent

active

042214050

ABSTRACT:
Insulated jacketed conduit units sealed in end to end relation by expansion couplings are insulated, sealed and spaced at the coupling zones with protective combined spacer and sleeve rings or washers which surround the coupled ends of the conduits, are bottomed on and squeezed between the insulation of adjacent units to position the conduit ends for expansion and contraction without breaking the seal therebetween and seat on adjacent ends of the jackets to protect the insulation. The combined spacer and sleeve rings or washers can be molded to have a relatively soft compressible inner washer portion and a tough stiffer sleeve portion with resilient sealing lips in the open ends thereof for sealingly engaging the jackets.

REFERENCES:
patent: 2857931 (1958-10-01), Lawton
patent: 3068026 (1962-12-01), McKamey
patent: 3250297 (1966-05-01), Mooneyham
patent: 3351361 (1967-11-01), Martin
patent: 3410313 (1968-11-01), Martin
patent: 3453716 (1969-07-01), Cook
patent: 3471177 (1969-10-01), Garrett et al.
patent: 3492029 (1970-01-01), French et al.
patent: 3563572 (1971-02-01), French
patent: 3642308 (1972-02-01), Zeile, Jr. et al.
patent: 3645564 (1972-02-01), Corriston
patent: 3677303 (1972-07-01), Martin
patent: 3744823 (1973-07-01), Muir
patent: 3747961 (1973-07-01), Couch et al.
patent: 3854756 (1974-12-01), Couch
patent: 4025091 (1977-05-01), Zeile

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