Artificial hand and drive apparatus for such hand
First Claim
1. An artificial hand comprising frame means constituting the hand proper, a thumb, first journal means operatively connecting the thumb to said frame means, finger means, second journal means operatively connecting said finger means to said frame means, first gear means secured to said thumb for rotating the thumb about the first journal means, second gear means secured to said finger means for rotating the finger means about said second journal means, said thumb and finger means being arranged opposite each other to form gripping tongues, worm gear means operatively interposed between said first and second gear means in such a position that both gear means mesh with said worm gear means simultaneously, motor means secured to said frame means, and reversible gear drive means supported by said frame means and operatively interposed between said worm gear means and said motor means for rotating said worm gear means, whereby said gripping tongues may be opened by the rotation of said worm gear means in one direction and closed by the rotation of said worm gear means in the opposite direction.
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Accused Products
Abstract
An artificial hand having at least one finger and a thumb is provided with drive motor and a gear to open and close the finger and thumb. A gear wheel is secured to each joint where the finger and thumb is connected to the hand proper. A motor driven worm gear meshes with both gear wheels and reversible gears are interposed between the motor and the worm gear, whereby an axially displaceable shaft maintains the interconnection between the drive means and the worm gear.
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Citations
9 Claims
- 1. An artificial hand comprising frame means constituting the hand proper, a thumb, first journal means operatively connecting the thumb to said frame means, finger means, second journal means operatively connecting said finger means to said frame means, first gear means secured to said thumb for rotating the thumb about the first journal means, second gear means secured to said finger means for rotating the finger means about said second journal means, said thumb and finger means being arranged opposite each other to form gripping tongues, worm gear means operatively interposed between said first and second gear means in such a position that both gear means mesh with said worm gear means simultaneously, motor means secured to said frame means, and reversible gear drive means supported by said frame means and operatively interposed between said worm gear means and said motor means for rotating said worm gear means, whereby said gripping tongues may be opened by the rotation of said worm gear means in one direction and closed by the rotation of said worm gear means in the opposite direction.
Specification