Patent ID: 8118275

Claim:
A valve for surgical or medical instruments comprising: a flexible section ( 1 ) with two ends ( 2 , 3 ) defining a mobile end ( 3 ) and another end ( 2 ), the flexible section further including a remainder section between the two ends ( 2 , 3 ), a passage at least partially closed by torsional deformation of a flexible section ( 1 ) of the passage wall, means for rotating the mobile end ( 3 ) of flexible section ( 1 ) in order to generate torsion, wherein the flexible section ( 1 ) comprises a first enlarged portion on the mobile end ( 3 ) and a second enlarged portion on the another end ( 2 ) each of which cooperate with fixation means, the first enlarged portion and the second enlarged portion have edges thicker than the remainder section of the flexible section.