Patent ID: 8517880

Claim:
A compressor comprising: a housing; a compression mechanism formed in the housing and operable to compress refrigerant; an input shaft supported by the housing, the input shaft extending into the housing from outside and rotatable on an axis of the input shaft; an output shaft supported by the housing, the output shaft extending in the housing and rotatable on the axis for driving the compression mechanism; a transmission provided in the housing between the input shaft and the output shaft for transmitting torque from the input shaft to the output shaft and also changing the rotating speed of the input shaft into two different rotating speeds of the output shaft for driving the compression mechanism by at the same or increased rotating speed, the transmission including: a plurality of planetary rollers; a carrier rotatably supporting the respective planetary rollers and integrally rotatable with the input shaft; a sun roller engaged with the respective planetary rollers and integrally rotatable with the output shaft; and a ring roller engaged with the respective planetary rollers, the ring roller which can be fixed to the housing or rotatable relative to the housing; and a control device provided between the carrier and the ring roller for controlling the operation of the transmission, the control device including: a one-way clutch provided between the ring roller and the carrier and allowing the ring roller to rotate only one direction relative to the carrier; and a clutch provided between the housing and the ring roller, the clutch fixing the ring roller to the housing or allowing the ring roller to rotate relative to the housing, wherein the ring roller including: a first ring engaged with the respective planetary rollers; and a second ring supporting the one-way clutch, wherein the ring roller can be movable relative to the housing in the direction parallel to the axis, wherein the first ring and the second ring are connected so that the first ring can be displaced in a radial direction, integrally rotatable with the second ring and movable with the second ring in the direction parallel to the axis.