Patent ID: 9399988
Filing Date: 2016-07-26
CPC Classification: F04B,F25B,F25D

Claim Text:
1. A reciprocating refrigerant compressor system comprising: a cylinder; a piston disposed within the cylinder and movable between a bottom dead center (BDC) and a top dead center (TDC) position; at least one fluid passageway disposed within the cylinder at a position between the BDC and TDC position, the at least one fluid passageway defined by a plurality of apertures disposed at the position between the BDC and TDC positon; at least one actuator in operative communication with the apertures; and a controller in signal communication with the actuator, the controller being responsive to an environmental condition external to the compressor system to activate the actuator to at least partially close the apertures, the controller activating the actuator to close the apertures asynchronously, the controller comprising a processor.