Air compressors

Abstract

An air compressor assembly is provided having a high pressure air receiver, a compressor, an outlet port and an inlet port on said compressor, said inlet port having a normally closed spring loaded inlet valve, the improvement comprising a two position normally open spring loaded poppet valve on said compressor, oil pressure actuator means acting on said poppet valve opposite said spring, receiving pressure oil from a pressure lubricating system in said compressor to close said poppet valve against the spring in normal operation of the compressor, a pulsation damper having upper and lower chambers connected by a metering means between the compressor and air receiver, a connection from the compressor to the lower chamber delivering high pressure air thereto, a connection from the lower chamber to the air receiver, a connection from the upper chamber to the poppet valve on the same side as the spring, a pressure responsive actuator means selectively acting on the inlet valve, and a connection from the poppet valve to said pressure responsive actuator means acting to deliver pressurized air from the poppet valve to open the inlet valve when the poppet valve is in its open position.

Dependencies are inferred from the claim text.