Patent ID: 8118729

Claim:
An endoscopic instrument comprising: a single walled hollow shank ( 2 ) that rinses in an intermittent manner, a proximal side of the hollow shank ( 2 ) being provided with a connection part ( 4 ) having a rinsing channel ( 6 ) and a suction channel ( 8 ), the connection part ( 4 ) comprising a slide valve ( 10 ) which selectively connects the hollow shank ( 2 ) to only the suction channel ( 8 ) and to only the rinsing channel ( 6 ); a coupling part ( 16 ) for fixing a working insert ( 18 ), wherein the coupling part ( 16 ) is rotatably mounted directly to the connection part ( 4 ) permitting rotation of the working insert ( 18 ) during an endoscopic operation without the hollow shank ( 2 ) being co-rotated; means ( 44 , 46 ) for detachable connection of the coupling part ( 16 ) and connection part ( 4 ); and an annular axial seal ( 38 ) provided directly between the coupling part ( 16 ) and the connection part ( 4 ), wherein the annular axial seal ( 38 ) sealingly bears on an end-face ( 50 ) of a rotary slide ( 12 ) of the slide valve ( 10 ).