Metal working – Means to assemble or disassemble – Puller or pusher means – contained force multiplying operator
Patent
1977-09-16
1979-12-25
Husar, Francis S.
Metal working
Means to assemble or disassemble
Puller or pusher means, contained force multiplying operator
165166, 113118R, 113118V, 113118D, 29 33G, B23P 1526
Patent
active
041797817
ABSTRACT:
An improved method for forming a heat exchanger core from a single elongated sheet of metal which is stamped to define longitudinally spaced corrugated sections and then is pleat folded between the stamped sections to define first and second groups of alternating fluid passages for indirect heat transfer between two fluids. During stamping of each corrugated section, edges of such section are clamped in place to define precise exterior dimensions and the corrugations are formed by stretching the metal to conform with a die. The stamped corrugations are shaped with triangular end reinforcements to control the location of the bends as the sheet is folded into the final shape of the core. Edges of the sections defining each passage in the first group are sealed together to prevent the fluids from leaking around such edges. In a modified embodiment, reinforcement strips of metal are placed between adjacent sections to permit operation of the core at higher pressures without increasing the thickness of the metal sheet.
REFERENCES:
patent: 2288061 (1942-06-01), Arnold
patent: 2571631 (1951-10-01), Trumpler
Beckmann Karen L.
Husar Francis S.
Rising V. K.
Todd, Jr. Oliver E.
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