×

Oilless compressor with a pressurizable crankcase and motor containment vessel

  • US 5,957,667 A
  • Filed: 05/23/1997
  • Issued: 09/28/1999
  • Est. Priority Date: 05/23/1997
  • Status: Expired due to Term
First Claim
Patent Images

1. An oilless gas compressor comprising:

  • a motor containment vessel containing a motor for driving said compressor, said motor comprising a stator and a rotor;

    a crankcase attached to said motor containment vessel, said crankcase and said motor containment vessel fluidly connected and together defining a sealed, pressurized interior cavity during operation of the compressor;

    a shaft disposed entirely in said interior cavity, said shaft rotatable by said motor;

    a cylinder mounted upon said crankcase, said cylinder comprising a piston, said piston connected to said shaft for reciprocation of said piston within said cylinder, said cylinder further comprising a gas intake valve and a gas discharge valve;

    a suction inlet port fluidly connected to a fluid passage;

    said passage comprising a first conduit, fluidly connected to said gas intake valve, and a second conduit, fluidly connected and adjacent to at least one inlet of said gas intake valve and to said pressurized interior cavity for recovering blow-by gas;

    a discharge outlet port fluidly connected to said gas discharge valve.

View all claims
  • 6 Assignments
Timeline View
Assignment View
    ×
    ×