Patent ID: 6264444
Filing Date: 2001-07-24
Classification: F04C

Abstract:
A scroll-type compressor comprising:a rotatable shaft having an axis;a stationary scroll having a stationary scroll base plate and a stationary spiral wall formed on the stationary scroll base plate;a movable scroll having a movable scroll base plate and a movable spiral wall formed on the movable scroll base plate, said movable scroll being opposed to said stationary scroll such that closed spaces are defined between said stationary spiral wall and said movable spiral wall, said movable scroll having an axis which does not coincide with said axis of said rotatable shaft;an orbital rotating mechanism for revolving said movable scroll around said axis of said rotatable shaft;a rotation preventing mechanism for preventing the rotation of said movable scroll around said axis of said movable scroll, said closed spaces having volumes which are reduced while said movable scroll is rotated around said axis of said rotatable shaft and is prevented from being rotated about said axis of said movable scroll; anda discharge chamber arranged on the back side of said movable scroll base plate opposite to said movable spiral wall so that a compressed gas is discharged from the final closed space into said discharge chamber and the pressure in said discharge chamber acts on the back surface of said movable scroll base plate;wherein said orbital rotating mechanism and said rotatable shaft are arranged on the side of said movable spiral wall with respect to said movable scroll base plate.