Patent ID: 8579808
Filing Date: 2013-11-12
Classification: A61B

Abstract:
1. A tensioning device for a surgical retractor, the tensioning device comprising: a tensioning section for applying a tensile force to a tool that is to be disposed thereon; a holding bar fixed in position relative to said tensioning section, said tensioning section has an end directed toward said holding bar; a locking device disposed between said holding bar and said tensioning section and having a releasable locking function counter to a direction of the tensile force, said locking device selected from the group consisting of a linear ratchet and a linear feed mechanism, said linear feed mechanism having an actuating lever and an unlocking device; a receiver being disposed at said end of said tensioning section directed toward said holding bar, said receiver provided for said holding bar and is a housing for said linear feed mechanism, said housing having a pivot axis for said actuating lever; at least one first function part disposed on said actuating lever and generating a force-fit, a form-fit and/or a friction-fit connection, that can be canceled, to said tensioning section and with which said tensioning section can be moved in a direction of said holding bar; a second function part having a force-fit, a form-fit and/or a friction-fit connection, that can be canceled, to said tensioning section and keeps said tensioning section locked, when said actuating lever is pivoted back, counter to a restoring of said tensioning section; said first function part includes a spring and a locking lever with a locking lug and is pretensioned by said spring disposed approximately parallel to said holding bar and is mounted pivotably in said actuating lever; said holding bar has along a length of said holding bar a latching track, and said locking lug of said locking lever engages in said latching track; said second function part has a locking lug; said latching track is one of two latching tracks; and said holding bar has on both sides along said length said latching tracks disposed opposite each other, said actuating lever engages around said holding bar, said second function part engages on said opposite latching track, and in that both said first and second function parts are configured identically as said locking levers with said locking lugs, and in that said locking levers alternate in their function depending on the direction of pivoting of said actuating lever.