Metal working – Means to assemble or disassemble – Puller or pusher means – contained force multiplying operator
Patent
1976-05-25
1978-07-25
Lanham, C.W.
Metal working
Means to assemble or disassemble
Puller or pusher means, contained force multiplying operator
165182, 29DIG1, 156290, 156291, 156324, B23P 1526
Patent
active
041020278
ABSTRACT:
A heat exchanger tube comprising a primary tubular element for carrying a heating or cooling medium and a secondary heat transfer surface spirally wound about the tubular element. The heat transfer surface is formed in a U-shaped configuration with its base being wound in metal-to-metal contact against the tube surface and the two legs thereof extending radially from the base. Each leg, in turn, is provided with a plurality of slits extending inwardly from the extreme edge thereof to create a dense population of relatively thin spine-like fins radiating from the tube. A meniscus of adhesive is formed between the legs and the surface of the tube which secures the base of the fin strip in metal-to-metal contact against the tube surface and also supports the individual spine-like fins in a radially extended position. In a further embodiment of the invention, the exposed surfaces of the primary and secondary elements are coated with a thin layer of adhesive to protect the tube from corrosion.
REFERENCES:
patent: 1689568 (1928-10-01), Wade
patent: 3548488 (1970-12-01), Habdas
patent: 3688375 (1972-09-01), Venables
patent: 4025681 (1977-05-01), Donnelly et al.
Greever James E.
Schafer James P.
Carrier Corporation
Curtin J. Raymond
Hayter Robert P.
Lanham C.W.
Rising V. K.
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