Patent ID: 8574116

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 of the input shaft 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 for changing a rotating speed of the input shaft into two different speeds of the output shaft for driving the compression mechanism by one of the same or an 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, the sun roller being engaged with the respective planetary rollers such that a peripheral surface of the sun roller is in interference contact with a peripheral surface of the respective planetary rollers; and a ring roller engaged with the respective planetary rollers, the ring roller being one of fixed to the housing or rotatable relative to the housing, and the ring roller being engaged with the respective planetary rollers such that a peripheral surface of the ring roller is in interference contact with the peripheral surface of the respective planetary rollers; 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 in only one direction relative to the carrier; and a clutch provided between the housing and the ring roller, wherein the input shaft, the carrier, the respective planetary rollers, the sun roller, and the ring roller cooperate to form an assembly, and wherein the assembly moves as a unit relative to the housing in a direction that is parallel to the axis of the input shaft in accordance with the clutch being configured to one of either fix the ring roller to the housing or allow the ring roller to rotate relative to the housing.