Patent ID: 7691108
Filing Date: 2010-04-06
Classification: A61B

Abstract:
1. A position locating instrument ( 10 ) for accurately determining the location of a cutting plane, the instrument comprising a base ( 11 ) connected to means ( 12 ) capable of determining the position of the instrument, a plate ( 24 ) moving along with the base for insertion into an opening ( 36 ) of a bone cutting guide ( 37 ), and resilient means for compensating for the play between the plate and the guide to prevent a movement of the instrument when it is inserted in the opening, the resilient means extending outwardly along only one face of the plate ( 24 ) to cause an opposite planar face of the base ( 11 ) to lie flush against a complementary planar surface ( 38 ) that defines the opening ( 36 ), wherein the resilient play compensation means comprise at least three flexible blades ( 28 A, 28 B, 28 C, 28 D) provided to bear against a surface ( 39 ) of the opening ( 36 ), wherein each flexible blade ( 28 A, 28 B, 28 C, 28 D) is bent, and is connected to the plate ( 24 ) at one end, the opposite end of the blade being provided to come into contact with the surface ( 39 ) of the opening ( 36 ).