Patent ID: 6634874
Filing Date: 2003-10-21
Classification: F04C

Abstract:
A scroll compressor comprising:a first scroll member having a base and a generally spiral wrap extending from the base; a second scroll member having a base and a generally spiral wrap extending from its base, said spiral wraps of said first and second scroll members interfitting to define compression chambers; a drive shaft for causing said second scroll member to orbit relative to said first scroll member, said drive shaft being normally driven in a first direction; and a device for allowing rotation of said drive shaft when driven in said first direction, but engaging said drive shaft to prevent rotation when driven in a second direction opposed to said first direction, said device including a clutch at a first axial location on said shaft, said clutch allowing rotation in only said first direction, and a second device positioned at a second axial location, axially spaced from said first axial location of said clutch, said second device resisting rotation of said shaft in said second direction to a greater extent than said second device resisting rotation of said shaft in said first direction.