Patent ID: 6139293
Filing Date: 2000-10-31
Classification: F01C

Abstract:
A rotation inhibiting mechanism for a movable scroll of a scroll type fluid machine comprising: a movable race fixed to a movable scroll which revolves with respect to a fixed scroll and provided with a plurality of annular ball rolling grooves extending along a revolutionary locus of said movable scroll; a fixed race opposing said movable race and provided with a plurality of annular ball rolling grooves same as those of said movable race; and a plurality of balls which are held sandwiched between said plurality of annular ball rolling grooves of said movable race and said plurality of annular ball rolling grooves of said fixed race, characterized in that when a radius of revolution to be obtained by said movable race, said plurality of balls and said fixed race is S1 and a radius of revolution to be determined by scroll walls of said movable scroll and said fixed scroll is S2, a relationship of S1<S2 is established.