Extension deceleration orthosis

Details Extension deceleration orthosis Extension deceleration orthosis

1988-10-21

1989-09-12

Burr, Edgar S.

Surgery

Truss

Perineal

128 80F, 128 78, A61F 500

Patent

active

048650242

ABSTRACT:
An extension deceleration orthotic fulcrum for knee and elbow braces, which simulates performance of the function of those ligaments that control joint motion and provide anteroposterior joint stability, comprising a lightweight, external spring assembly, upper and lower elongated arms, and centric or polycentric fulcrum, which is adjustable for its range of motion, adaptable for use on many different style orthoses, and whose strength can be varied to suit corrective, preventive, anthropomorphic, environmental, and usage requirements, including means both for mechanically dampening the limb's angular velocity on extension to prevent hyperextension and for accelerating the limb's angular velocity on flexion to enable quicker, smoother, less stressful motion. In one embodiment spring rods are assembled medially and laterally to conventional pairs of elongated orthotic brace arms to span the joint fulcrum point by serpentinely engaging novel roller posts, the assemblage thus serving to decelerate the limb during the last 15 to 20 degrees of extension, to help prevent the striking of a stop with its attendant risk of hyperextension, and thus serving to use the stored energy of the spring to facilitate flexion of the limb.

REFERENCES:
patent: 817785 (1906-04-01), Kritsch
patent: 1072369 (1913-09-01), Spahn
patent: 4370977 (1983-02-01), Mauldin et al.
patent: 4524764 (1985-06-01), Miller et al.
patent: 4751920 (1985-06-01), Mauldin et al.
patent: 4803975 (1989-02-01), Meyers

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