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Aspirator for endoscopic system

  • US 4,973,311 A
  • Filed: 12/28/1987
  • Issued: 11/27/1990
  • Est. Priority Date: 12/27/1986
  • Status: Expired due to Term
First Claim
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1. An aspirator system for an endoscope, comprising:

  • an endoscope having an aspirating suction nozzle at its insertion end;

    a suction pump;

    a suction conduit connecting the suction nozzle to the suction pump;

    intermittent aspirating means for alternately opening and closing the suction conduit during operation of the suction pump to carry out intermittent aspiration; and

    an aspirator button for supplying an aspiration command signal to the intermittent aspiration means;

    the intermittent aspirating means comprising;

    (a) a first electromagnetic valve disposed in the suction conduit;

    (b) a communicating path connected at one end to the suction conduit between the first electromagnetic valve and the suction pump, the other end of the path being open to atmosphere;

    (c) a second electromagnetic valve disposed in the communicating path; and

    (d) an electromagnetic valve controller means, for controlling the first electromagnetic valve to close the suction conduit when the aspiration command signal is not supplied from the aspirator button during operation of the suction pump, but controlling the first and second electromagnetic valves to open the suction conduit and alternately open and close the communicating path when the aspiration command signal is supplied by the aspirator during operation of the suction pump.

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