Heat exchange – Tubular structure – Projecting internal and external heat transfer means
Patent
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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