Pipe joints or couplings – With casing – lining or protector
Patent
1975-08-22
1976-08-24
Arola, Dave W.
Pipe joints or couplings
With casing, lining or protector
285 93, 285226, F16L 1112
Patent
active
039763129
ABSTRACT:
An expansion joint having a first corrugated tubular member including a plurality of ridges and valleys and having connections at each end for connection in a conduit in which a protective member including a second corrugated tubular member is sized to encircle the exterior of the first tubular member and includes a plurality of ridges and valleys mating with the ridges and valleys of the first member. The second protective tubular member receives any material flowing through a leak in the first member and prevent spraying of the material to the surroundings. The second member is flexible for moving with the first member and preferably the second member is transparent whereby leaks in the first member may be visually observed.
REFERENCES:
patent: 3299417 (1967-01-01), Sibthorpe
patent: 3527479 (1970-09-01), Matthiessen
patent: 3594021 (1971-07-01), Williams
patent: 3655224 (1972-04-01), Carberry et al.
Arola Dave W.
Peabody Dore' Corporation
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