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Method for forming scroll members used in a scroll type fluid machine

  • US 4,696,084 A
  • Filed: 02/26/1986
  • Issued: 09/29/1987
  • Est. Priority Date: 06/14/1985
  • Status: Expired due to Fees
First Claim
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1. A method for forming scroll members used in a scroll type fluid machine comprising a pair of engaged scroll members each including a side plate and a spiral lap uprightly disposed on an inside surface of said side plate;

  • when said scroll members are relatively revolved, a fluid volume in sealed chambers defined by said pair of engaged scroll members being varied, so that a pressure of the fluid in said sealed chambers is thereby varied in order to discharge a gas therefrom, said method being characterized by roughly working each corner of an inner end base portion of said lap and said inside surface of said side plate of said scroll member so as to form a complete round having a relatively large curvature radius which is enough to provide said lap with fatigue strength, by the use of a cutter, and the finishing, at each corner portion, a round having a relatively small curvature radius which does not contact with a tip end portion of said lap of the partner scroll member, by the use of a cutter.

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