Tube provided with inner fins and outer fins or pins, particular

Details Tube provided with inner fins and outer fins or pins, particular Tube provided with inner fins and outer fins or pins, particular

1979-08-06

1981-12-22

O'Connor, Daniel J.

Heat exchange

Tubular structure

Projecting internal and external heat transfer means

138 38, 165182, F28F 142

Patent

active

043066194

ABSTRACT:
A tube, particularly effective as a heat exchanger, is provided with inner fins and outer fins or pins, and is made by welding to one another a plurality of sections, having a wing or rib thereof curved according to a circle arc. The sections have a T, L-shaped cross-section or a converging wing U-shaped cross-section, and the like, a substantially Z-shaped cross-section, or a wide wing beam shaped cross-section, and the like, so that they provide also the outer fins.

REFERENCES:
patent: 1693970 (1928-12-01), Von Platen et al.
patent: 1777782 (1930-10-01), Bundy
patent: 2322341 (1943-06-01), Booth
patent: 2386462 (1945-10-01), Hess
patent: 2467668 (1949-04-01), Hallberg
patent: 2703921 (1955-03-01), Brown
patent: 2726681 (1955-12-01), Gaddis et al.
patent: 2731709 (1956-01-01), Gaddis et al.
patent: 2775431 (1956-12-01), Krassowski
patent: 2930405 (1960-03-01), Welsh
patent: 3002729 (1961-10-01), Welsh

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