Patent ID: 8096792

Claim:
A scroll type fluid machine comprising: a fixed-side member including a cylindrical casing, and a fixed scroll fixed to said casing and having an end plate and a spiral wrap portion extending from said end plate; an orbiting scroll opposed to said fixed scroll of said fixed-side member, orbitably provided in said casing, having an end plate and a spiral wrap portion extending from said end plate, said wrap portion of said orbiting scroll overlapping said wrap portion of the fixed scroll, thereby defining a plurality of compression chambers; and at least three ball coupling mechanisms provided between said orbiting scroll and said fixed-side member to prevent rotation of said orbiting scroll, and for receiving a thrust load between them, wherein at least two of said ball coupling mechanisms comprises: a sphere rotatably provided between said fixed-side member and said orbiting scroll for receiving a thrust load applied to said orbiting scroll; and a rotation preventing cylindrical member provided between said fixed-side member and said orbiting scroll so as to surround the sphere from the outside in the radial direction to prevent rotation of said orbiting scroll.