Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Leg – Knee
Patent
1998-02-24
1999-09-07
Willse, David H.
Prosthesis (i.e., artificial body members), parts thereof, or ai
Leg
Knee
623 39, 188287, 188285, 18832219, A61F 264
Patent
active
059480211
ABSTRACT:
A hydraulic cylinder control unit for gait control of a prosthetic limb which features two cylindrical tubes that are eccentric with respect to each other. The inner tube houses hydraulic fluid and the gap between the two tubes serves as a displacement chamber as a piston, mounted on a piston rod, moves through the fluid in the inner tube. When the outer tube is rotated about the inner tube, the gap between the tubes changes which either increases or decreases the flow allowed between the tubes. This changes the resistance which controls the rate of swing of an artificial limb. The resistance is easily adjustable by a simple rotation of the outer cylindrical tube. A floating sealed piston is additionally provided at the bottom of the inner tube. The sealed piston moves upwards or downwards depending on the balance of forces between the fluid force above the piston and the stored energy force below the sealed piston. The stored energy force can be either a spring or compressed gas and helps to return stored energy to the system and reduces the amount of energy required by the person in walking.
REFERENCES:
patent: 4044865 (1977-08-01), Tourunen
patent: 4056040 (1977-11-01), Fussangel
patent: 4212087 (1980-07-01), Mortenson
patent: 4595179 (1986-06-01), Glabiszewski
patent: 5376135 (1994-12-01), Aulie
patent: 5405409 (1995-04-01), Knoth
patent: 5443521 (1995-08-01), Knotch et al.
Hosmer-Dorrance Corporation
McGuire, Jr. John P.
Schneck Thomas
Willse David H.
LandOfFree
Hydraulic cylinders for limb gait control does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Hydraulic cylinders for limb gait control, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hydraulic cylinders for limb gait control will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1799491