Patent ID: 6206665
Filing Date: 2001-03-27
Classification: F01C,F16C

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 diameter of a ball orbit of said movable race is Sa and a diameter of a ball orbit of said fixed race is Sb, a relationship of Sa<Sb is established.