Patent ID: 6499978
Filing Date: 2002-12-31
Classification: F04C

Abstract:
A scroll compressor comprising:a first scroll having first involute wrap; and a second scroll having second involute wrap, said first and second involute wraps engaging with each other during relative rotation to form a plurality of variable compression chambers therebetween, wherein said first and second involute wraps have respective initial ends and terminal ends, with the terminal end being located at an angle &phgr;e relative to the initial end, each of said first and second involute wraps has an initial section defined between its respective initial end and an angle of &phgr;e-4&pgr;, a middle section defined between the angle of &phgr;e-4&pgr; and an angle of &phgr;e-2&pgr;, and a terminal section defined between the angle of &phgr;e-2&pgr; and said terminal end at the angle of &phgr;e; wherein said middle section of said first involute wrap is thicker than said initial section and said terminal section of said first involute wrap; and wherein said first involute wrap is symmetrical to said second involute wrap excepting only that said middle section of said first involute wrap may have a thickness different than said middle section of said second involute wrap.