Knee brace having freecentric locking hinge

Details Knee brace having freecentric locking hinge Knee brace having freecentric locking hinge

A - Human Necessities

61

F

A61F 5/01 (2006.01)

Patent

CA 2084192

2084192 9118565 PCTABS00008 The present invention relates to a knee brace (10) which includes an upper and lower cuff (11, 12) which are attached at the medial and lateral sides of the knee joint by freecentric locking hinges. The freecentric hinge includes a free floating center of rotation which allows simultaneous translation and rotation of the upper hinge arm (13) relative to the lower hinge arm (14). The freecentric hinge may further include a locking mechanism which comprises a pin (23) located on the upper hinge arm (13) and a hook (26) located on the lower hinge arm (14) which may be forced into engagement to prevent further rotation of the hinge when it is desired to prevent hyperextension of the user's knee. A pair of tension straps (18, 19) may be attached across the back of the user's knee from the upper cuff (11) to the lower cuff (12), and adjusted in their length so that extension of the knee tends to generate tension in the straps (18, 19) which aids in pulling the upper and lower cuff members (11, 12) towards each other. The motion of the upper and lower cuffs (11, 12) towards each other causes the hook (26) and pin (23) of the locking mechanism to be correctly positioned for interengagement and locking of the hinge against further extensional rotation. If desired, the upper hinge arm (13) may be attached to the upper cuff (11) in a manner which allows free sliding movement therebetween in order to compensate for forces incident on the brace (10) due to the motion of the hinge as it tracks the rotation of the user's knee.

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