A compressor has a suction throttle valve, which includes a suction passage, a suction port, a valve body, an urging member, a valve chamber, a first communication hole, a closing valve and a valve seat. The closing valve closes the hole of the valve body by pressure difference between the valve chamber...http://www.google.es/patents/US7931452?utm_source=gb-gplus-sharePatente US7931452 - Suction throttle valve of a compressor
