Patents Examined by Steven J. Gavey
  • Suck back valve
    Patent number: 5950923
    Abstract: A suck back valve is proposed, comprising a suck back mechanism for sucking a coating liquid inside a fluid passage under a negative pressure action of a diaphragm displaced by a pilot pressure, an ON/OFF valve for opening and closing the fluid passage under action of the pilot pressure, and a flow amount control device for controlling the pilot pressure supplied to the ON/OFF valve.
    Type: Grant
    Filed: March 19, 1998
    Date of Patent: September 14, 1999
    Assignee: SMC Kabushiki Kaisha
    Inventors: Yoshihiro Fukano, Tetsuro Maruyama