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US 4,229,841 AGranted
Wrist prosthesis
AssigneeUniversity of Iowa Research Foundation
InventorsYoungil Youm, Adrian E. Flatt
Life of this patent
Estimating the term…
Abstract
A proximal component affixed to the radius of the forearm and a distal component affixed to the hand are connected by a joint which prevents axial rotation between the components relative to the forearm axis and provides relative movement of the components about two substantially perpendicular axes which are transverse to the forearm axis for radial-ulnar hand movement and flexion-extension hand movement.
Claims14
A wrist prosthesis comprising,
- a proximal component, means for connecting the proximal component to the radius of the forearm,
- a distal component, means for connecting the distal component to at least one of the metacarpal bones,
- joint means for connecting the proximal component to the distal component to prevent axial rotation between said components relative to the forearm axis and to provide movement of said distal component relative to said proximal component about two substantially perpendicular axes which are transverse to the forearm axis for radial-ulnar hand movement and flexion-extension hand movement
- said joint means including a joint member, a first pivot pin defining a first pivot axis connected to the joint member and to one said component to provide flexion-extension movement of the hand about said first pivot axis, a second pivot pin defining a second pivot axis connected to the joint member and to the other said component to provide radial-ulnar deviation of the hand about said second pivot axis.
1 more element
A wrist prosthesis comprising,
- a proximal component, a distal component, and a joint member,
- connector means for connecting the proximal component to the radius of the forearm,
- a first pivot pin defining a first generally transverse pivot axis connected to said proximal component and said joint member to provide pivotal movement of the joint member about said first generally transverse pivot axis,
- connector means for connecting the distal component to at least one of the metacarpal bones,
- a second pivot pin defining a second generally transverse pivot axis connected to said distal component and said joint member to provide pivotal movement of said distal component about said second generally transverse pivot axis which is generally perpendicular to said first pivot axis,
- said pivot pins being oriented to provide radial-ulnar movement and flexion-extension hand movement and to prevent axial rotation of the distal component relative to the proximal component.
3 more elements
Dependencies are inferred from the claim text.