Patent ID: 6984204

Claim:
An endoscopic liquid feed device, said liquid feed device including a liquid feed port provided on a casing of a manipulating head assembly of an endoscope in communication with an internal liquid feed passage leading to a liquid injection port opened at a fore distal end portion of an insertion tube of said endoscope, and a mouth piece provided fixedly at said liquid feed port for detachably connecting a liquid feed adaptor to said liquid feed port at the time of feeding a liquid to said liquid injection port from a pressurized liquid feed means connected to said liquid feed adaptor, characterized in that: a liquid feed adaptor is constituted by a Luer-Lok member having a check valve member fitted on a fore end portion thereof, a stopper ring provided on outer periphery of said Luer-Lok member, and a nut member rotatably fitted on said Luer-Lok member and axially movable between said stopper ring and a flange portion provided at an outer proximal end of said Luer-Lok member; a mouth piece being provided with an external male screw portion on outer peripheral side thereof for threaded engagement with said nut member, and formed with a Luer-Lok portion on inner peripheral side thereof, said Luer-Lok portion having a gradually diminishing inside diameter in forward direction; and a pressurized liquid feed means such as a syringe being detachably connectible to said Luer-Lok portion of said mouth piece in place of said liquid feed adaptor.