Apparatus for manufacturing heat transfer tubes

Details Apparatus for manufacturing heat transfer tubes Apparatus for manufacturing heat transfer tubes

1978-01-11

1979-11-27

Husar, Francis S.

Metal deforming

By extruding through orifice

With cutting

72256, 72264, 72275, 72278, 72283, 291573A, 113118V, 425325, B21C 2310, B21C 2504, B21C 134, B21C 300

Patent

active

041754166

ABSTRACT:
An apparatus for manufacturing heat transfer tubes for use in evaporators and coolers for freezers, air conditioning units, refrigerators, and the like, with close machining tolerances. It forms cavities, with small openings communicating them with the outside, on the inside of a tube, through three steps of forming a multiplicity of alternate grooves and ribs in parallel on the inner surface of the tube, forming cuts in the concentrically directed crests of the ribs, and then forcing the crests sidewise so that the crest of each rib is bent down onto an intermediate part of the adjacent rib to form a cavity in between.

REFERENCES:
patent: 2586011 (1952-02-01), Doelter
patent: 3289451 (1966-12-01), Koch et al.
patent: 3422518 (1969-01-01), French
patent: 3662582 (1972-05-01), French
patent: 3750709 (1973-08-01), French
patent: 3776018 (1973-12-01), French
patent: 3887004 (1975-06-01), Beck
patent: 4031279 (1977-06-01), Cremer
patent: 4060125 (1977-11-01), Fujie et al.

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