Limb protection device
A joint-supporting device comprises tensile members extending from a proximal cuff secured to the limb above the joint to a distal cuff secured to the limb below the joint, supplementing the tensile characteristics of the joint's tendons, ligaments, and other structure. The device may also comprise structure for limiting the range of motion and angular velocity of the joint.
1. A joint support device for limiting a range of motion of a joint disposed between a proximal and distal section of a limb, said joint defining an axis of rotation, comprising:
a proximal cuff, adapted to fit closely about said proximal section of said limb, and be secured thereto;
a distal cuff, adapted to fit closely about said distal section of said limb, and be secured thereto;
said proximal and distal cuffs each comprising medial and lateral structure comprising bores for receiving medial and lateral pivot pins, such that said proximal and distal cuffs can be assembled to one another for relative pivoting, thus defining an axis of rotation adapted to be substantially aligned with the axis of rotation of said joint; and
a first toothed gear secured to one of said proximal and distal cuffs and a second toothed gear adapted to be secured to said first toothed gear with the teeth of said gears engaged so as to prevent relative motion thereof, said second toothed gear having a first stop fixed thereto and adapted to contact a second stop adapted to be secured to the other of said proximal and distal cuffs to limit the range of motion of said joint, wherein said second toothed gear can be disengaged from said first toothed gear, their relative positions adjusted, and be resecured to and reengaged with said first toothed gear, whereby the position of said first stop relative to said second stop can be selected to controllably limit the range of motion of the joint.
2. The device of claim 1 , further comprising structure for limiting an angular velocity of the joint while allowing pivoting thereof.
3. The device of claim 1 , wherein said first toothed gear is generally circular and has external teeth on a peripheral edge thereof, and said second toothed gear is generally circular and has internal teeth, whereby said second toothed gear is moved axially with respect to said first toothed gear to allow adjustment of their relative positions.
4. The device of claim 1 , wherein said first toothed gear is secured to the proximal cuff and said second stop is secured to the distal cuff.
5. The device of claim 1 , further comprising one or more elongated resilient members connected between the proximal and distal cuffs so as to be placed under tension during extension of the joint, supporting the joint.