Patents Assigned to Kabushiki Kaisha Ecti Kenkyusho
  • Reciprocating type oil-free gas compressor
    Patent number: 4495855
    Abstract: In an oil-free multistage gas compressor comprising cylinders, a plurality of compression pistons in respective cylinders and a transmission mechanism for reciprocating said compression pistons through guide pistons serially connected to said compression pistons, the improvement wherein a common space where these pistons come in and out is defined adjacent the connections, and a diaphragm is disposed in said space transversely whereby said compression pistons are oil-tightly separated from said guide pistons.
    Type: Grant
    Filed: December 9, 1983
    Date of Patent: January 29, 1985
    Assignees: Showa Precision Machinery Co., Ltd., Kabushiki Kaisha Ecti Kenkyusho
    Inventors: Muneo Murakami, Zentaro Ishizaki