Method of fabricating heat transfer conduits

Details Method of fabricating heat transfer conduits Method of fabricating heat transfer conduits

1979-07-16

1980-12-02

Gilden, Leon

Metal working

Means to assemble or disassemble

Puller or pusher means, contained force multiplying operator

291573R, 165105, F28D 1500, B21D 5302, F25B 1500

Patent

active

042362881

ABSTRACT:
A method of fabricating a plurality of heat transfer conduits is disclosed wherein an elongated metal pipe is evacuated, a predetermined quantity of heat transfer fluid is placed within such evacuated pipe and the pipe ends sealed airtight. The elongated sealed pipe is wound in a helical or serpentine configuration, the lower vertical portions of the so configured pipe are heated so that the liquid phase of the heat transfer fluid is evaporated and redistributed in an even manner in the lower vertical portions of successive convolutions of such pipe, and is then flattened, for example, at each of its upper vertical portions to form vacuum-tight seals between adjacent convolutions. A cutting procedure across each of the flattened upper portions (or selected ones of such flattened upper portions) enables a separation of the elongated sealed pipe into a plurality of heat transfer conduits without the necessity of a further evacuation procedure.

REFERENCES:
patent: 3498369 (1970-03-01), Levedahl
patent: 4180127 (1979-12-01), Maxson

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