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Method for producing heat sink and heat sink thus produced

  • US 4,747,450 A
  • Filed: 09/18/1986
  • Issued: 05/31/1988
  • Est. Priority Date: 09/18/1985
  • Status: Expired due to Term
First Claim
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1. A stacked assembly comprising electrical elements and heat sinks, said elements and heat sinks being disposed alternately in side-by-side relationship and being pressed together to form a rigid structure wherein each of the electrical elements is interposed between two adjacent heat sinks to be cooled thereby, each of said heat sinks being made of a prefabricated pipe of a heat conductive material in which a liquid coolant is caused to flow, said pipe comprising, in integrally continuing relation a forward flow pipe portion, a return flow pipe portion and a middle pipe portion connected said forward and return flow pipe portions, said middle pipe portion being bent in such a manner that the forward and return flow pipe portions extend in parallel, mutually contacting relationship, said forward and return flow pipe portions being so wound around the middle pipe portion so as to form coplanar spirals, thereby establishing a heat transferring relationship between adjoining surfaces of the forward and return flow pipe portions.

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