Patent ID: 8333690

Claim:
An endoscopic fluid feed system for use with an endoscope having an endoscopic optical observation window on a rigid tip end portion at a fore distal end of an elongated insertion member extended forward from a manipulating head assembly, a multiplex connector provided at a proximal end of a universal connection cable to disconnectibly connect said endoscope to external component units, and an observation window washer means and a fluid injection means for injecting a fluid into a body cavity from an injection passage leading to an injection hole opened on said rigid tip end portion of said insertion member, characterized in that said fluid feed system comprises: a conduit connection terminal provided on said multiplex connector, providing connection ports for a wash fluid conduit and a compressed air conduit of said observation window washer means; and a conduit coupler member adapted to be disconnectibly connected to said conduit connection terminal and internally formed with a wash liquid supply conduit in communication with a liquid feed tank, and a compressed air supply conduit to be disconnectibly connected to said compressed air conduit for supply of compressed air to apply a pressure on a liquid surface in said liquid feed tank; an air chamber formed between said conduit coupler member and said conduit connection terminal when connected so as to communicate said compressed air conduit to said compressed air supply conduit; a normally closed on-off valve provided in said wash fluid conduit adapted to bring, into communication with said wash liquid supply conduit when said conduit coupler member being connected to said conduit connection terminal; said conduit coupler member being provided with an injection fluid connection port to said injection passage, which injection fluid connection port being disconnectibly connectible to an injection fluid supply conduit; said injection fluid connection port being communicated with said injection fluid passage when said conduit coupler member is connected to said conduit connection terminal.