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Apparatus for transmitting liquid and gas in an endoscope

  • US 4,844,052 A
  • Filed: 03/11/1988
  • Issued: 07/04/1989
  • Est. Priority Date: 03/11/1987
  • Status: Expired due to Term
First Claim
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1. An apparatus for transmitting liquid and gas in an endoscope, comprising:

  • conduit means for transmitting liquid and gas to an observation optical system to clean the system; and

    automatic change-over means for sequentially operating both the liquid and gas transmission modes by turning on and off a liquid transmitting switch means disposed in an operating portion, the automatic change-over means comprising a first electromagnetic valve disposed in the liquid transmitting conduit means, a second electromagnetic valve disposed in the gas transmitting conduit means, and circuit means for connecting the first and second electromagnetic valves, the liquid transmitting switch means of the operating portion and a control section, for controlling the operation of the electromagnetic valves.

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