Cylinder for artificial leg

Details Cylinder for artificial leg Cylinder for artificial leg

1993-01-14

1995-04-11

Willse, David H.

Prosthesis (i.e., artificial body members), parts thereof, or ai

Leg

Knee

92181P, 92 85B, 91 22, 91399, 188317, A61F 264, A61F 274

Patent

active

054054079

ABSTRACT:
In an artificial leg for a person having an upper thigh cut and a knee joint lost, a cylinder disposed between upper and lower leg members, which are coupled through a pivotable joint, for controlling bending and straightening of the joint by an air cushion for convenience of walking. The cylinder includes a cylindrical sleeve closed at both ends and a piston having a piston rod and sliding in the sleeve, and has its structure improved by using as a cushion one of two inner cavities separated by the piston, which encloses the piston rod, thereby buffering butting between the upper and lower leg members to remove unpleasant shock resulting at the end of straightening the joint.

REFERENCES:
patent: 5062857 (1991-11-01), Berringer et al.

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