Slidably-coupled joint

Details Slidably-coupled joint Slidably-coupled joint

1980-10-06

1982-03-23

Yasko, John D.

Surgery

Truss

Perineal

3 22, A61F 300

Patent

active

043207472

ABSTRACT:
An artificial joint for a knee or elbow brace in which the axis around which motion takes place is not fixed but rather follows the natural joint. An eccentric member extends from one of the joint elements into a guide formed in the other joint element and is threadedly engaged with a retaining screw to hold the joint elements in overlapping relation. Simultaneously, an elongated pin protrudes from the inner face of the joint element having the guide into a tapered groove formed in the joint element from which the eccentric member extends. The depth of the groove is less than the thickness of the joint element in which it is formed within the zone of overlap. The abutments of the eccentric member against the edge surfaces of the guide and of the pin against the edge surfaces of the groove, either simultaneously or at different times, limit the relative movements of the joint elements and provide support for a wearer's joint. At full extension, the eccentric member and the pin each abut an edge surface to lock the joint so as to prevent any increase in the angle between the longitudinal axes of the joint elements. For the treatment of an injured joint, one or more inserts may be placed in the groove to reduce the travel of the pin. For athletic use, the artificial joint is incorporated in a knee brace having improved straps to provide freedom of movement of both the natural joint and the large muscles of the leg. Because both the guide and the groove are totally enclosed, the joint can be used in severe environments such as the playing fields of contact sports.

REFERENCES:
patent: 3779654 (1973-12-01), Horne
patent: 3817244 (1974-06-01), Taylor
patent: 3958569 (1976-05-01), Vosburgh

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