Torque measuring spring for a prosthetic device
First Claim
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1. An apparatus comprising:
- a first member;
a second member moveably connected to the first member;
a spring member fixed to the first member, the second member contacting the spring member during at least a portion of the movement of the second member with respect to the first member, the spring member deflecting from a neutral position when contacted by the second member and providing resistance to the rotation of the second member; and
a contact plate, attached to the spring member at the point of contact between the spring member and the second member.
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Abstract
An improvement to a prosthetic device which provides a spring member between first and second structural members that are rotatably connected to one another, the spring member providing predictable resistance as it is compressed by the rotation of the first and second structural members with respect to each other. The known resistance of the spring is used as an input to a model controlling a motor control circuit to provide counter-torque as rotational torque is applied to compress the spring.
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Citations
23 Claims
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1. An apparatus comprising:
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a first member; a second member moveably connected to the first member; a spring member fixed to the first member, the second member contacting the spring member during at least a portion of the movement of the second member with respect to the first member, the spring member deflecting from a neutral position when contacted by the second member and providing resistance to the rotation of the second member; and a contact plate, attached to the spring member at the point of contact between the spring member and the second member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 23)
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17. A spring apparatus comprising:
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a first arm having a contact portion and a contact plate, attached to the spring apparatus at the contact portion; a second arm, connected at one end to the first arm; a third arm, connected at one end to the opposite end of the second arm; a fourth arm, connected at one end to the opposite end of the third arm; and a mounting plate;
connected to the opposite end of the fourth arm. - View Dependent Claims (18, 19, 20, 21, 22)
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Specification