Metal working – Means to assemble or disassemble – Heat exchanger
Patent
1982-09-20
1984-01-10
Goldberg, Edward N.
Metal working
Means to assemble or disassemble
Heat exchanger
291574, 291573R, 72135, 72143, 72369, 72371, 165156, B23P 1526
Patent
active
044246242
ABSTRACT:
A compact multiple coil heat exchanger having a high heat transfer density is provided to include at least an inner coil formed from a continuous tube into a plurality of contiguous turns about a common axis in a spiral arrangement and having a pitch in one direction and an outer coil formed from the continuous tube into a plurality of overlapping turns concentrically about the inner coil in a spiral arrangement having an opposite pitch. Further, a coil-forming apparatus and continuous coil-forming method is directed to form a multiple coil heat exchanger from a continuous tube using a coil-forming die rotatably mounted on a support frame. The coil-forming die includes a continuous spiral thread constructed to receive and laterally support the continuous tube while fabricating the multiple coil heat exchanger according to the continuous coil-forming method of this invention. The thread of the coil-forming die terminates at one end thereof at a coil-reversing plate having a first portion which spirals outward to a radial position above the thread and a second portion which axially extends towards the opposite end of the coil-forming die to form a one-piece multiple coil heat exchanger.
REFERENCES:
patent: 1483985 (1924-02-01), Price
patent: 1802161 (1931-04-01), Summers
patent: 2983300 (1961-05-01), Abbott
patent: 3340712 (1967-09-01), Jameson
patent: 4155239 (1979-05-01), Fjallstrom et al.
patent: 4205543 (1980-06-01), Wright
Goldberg Edward N.
Rising V. K.
Spiral Tubing Corp.
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