Air gap pipe

Details Air gap pipe Air gap pipe

1983-10-14

1985-02-26

Bryant, III, James E.

Pipes and tubular conduits

Plural duct

Surrounding radially spaced duct with axially spaced...

138114, 138178, 60320, F16L 1100

Patent

active

045013020

ABSTRACT:
An air gap pipe and a method for forming the same are provided. This air gap pipe includes a non-linear outer pipe and an inner pipe of identical configuration disposed concentrically within the outer pipe. The inner pipe is supported by resilient dimples in the outer pipe. The outer pipe is placed in a condition for receiving the inner pipe by longitudinally cutting the outer pipe in half with a pre-programmed plasma arc or laser cutting apparatus. The two halves of the outer pipe are secured together to provide vents, if necessary, for selective dissipation of heat.

REFERENCES:
patent: 236077 (1880-12-01), Peirce
patent: 2370062 (1945-02-01), Mercier
patent: 3457724 (1969-07-01), Gandy et al.
patent: 3645092 (1972-02-01), Tatsuto et al.
patent: 3884194 (1975-05-01), Grosseau
patent: 3908372 (1975-09-01), Fowler et al.
patent: 4031699 (1977-06-01), Suga et al.
patent: 4185463 (1980-01-01), Tanahashi et al.

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