Pipe joints or couplings – With indicator – alarm or inspection means
Patent
1979-07-26
1981-07-14
Arola, Dave W.
Pipe joints or couplings
With indicator, alarm or inspection means
285138, 285187, 285300, 285381, 285286, 285 14, F16L 3500
Patent
active
042782775
ABSTRACT:
The annular space between inner and outer coaxially-mounted pipes is sealed by a bellows diaphragm with a cylindrical surface corrugated in the longitudinal direction formed in and at one end of said annular space, wherein one end of said bellows is circumferentially attached to a circumferential portion of the outer surface of the inner pipe and the other end of said bellows is circumferentially attached to a circumferential portion of the inner surface of said outer pipe. The other end of said annular space is sealed by a ring attached to a circumferential portion of the outer surface of the inner pipe and to a circumferential portion of the inner surface of the outer pipe. In one version of the invention this ring includes a pressure release valve to allow any high pressure fluids in the annular space to escape.
REFERENCES:
patent: 2419278 (1947-04-01), Mutsenbucker
patent: 3068026 (1962-11-01), McKamey
patent: 3488067 (1970-01-01), Sommer
patent: 3574357 (1971-04-01), Alexander
patent: 3608640 (1971-09-01), Willhite
patent: 3693665 (1972-09-01), Veerling
patent: 4046407 (1977-09-01), Porrelo
General Electric, Therm-O-Case III, Insulation Assembly, 1979, 1 page dwg.
Arola Dave W.
MacPherson Alan H.
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