Patent ID: 6360793
Filing Date: 2002-03-26
Classification: F17C

Abstract:
A natural gas filling apparatus comprising an engine and a compressor, said engine comprising an induction system and an exhaust manifold, said apparatus also comprising an inlet nozzle and a dehumidifier being connected to said inlet nozzle through a first gas supply pipe, a second gas supply pipe extending between said compressor and said dehumidifier, said dehumidifier comprising a first moisture absorbing filter and a second moisture absorbing filter, a heated air supply being connected to said first filter and said second filter, a heated air return being connected to said induction system, a first switching portion being interposed between said first gas supply pipe, said heated air supply and said first and second moisture absorbing filters, a second switching portion being interposed between said second gas supply pipe, said heated air return and said first and second moisture absorbing filters, said first portion and said second portion selectively connecting said first gas supply pipe and said second gas supply pipe to one of said first filter and said second filter and said heated air supply and said heated air return to the other of said first filter and said second filter, said compressor comprising multiple compression stages and communicating with a delivery conduit, said delivery conduit connecting said compressor to an outlet socket, a gas cooling heat exchanger interposed between at least a portion of said compressor and said delivery conduit and a pressure sensor communicating with said delivery conduit.