LOWER-LIMB PROSTHESIS FORCE AND MOMENT TRANSDUCER
First Claim
1. A transducer, comprising:
- a transducer body;
an adaptor on the transducer body for coupling to a prosthesis;
a first strain-measuring device on the transducer to measure forces in a first plane; and
a second strain-measuring device on the transducer to measure forces in a second plane substantially orthogonal to the first plane;
wherein the first and the second strain-measuring devices are arranged to reduce measuring forces in a third plane orthogonal to the first and second planes.
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Accused Products
Abstract
A computerized prosthesis alignment system includes a transducer that can measure socket reactions in the anterior/posterior plane and the right/left planes, while canceling or reducing the transverse forces on the measurements of these socket reactions. In addition, the transducer is also capable of determining the axial load or weight experienced by the prosthesis. The computerized prosthesis alignment system is in communication with a host computer. The moment data from the transducer is interpreted by the user via a computer interface. The host computer includes memory for storing one or more applications. These applications receive data from the transducer, interpret the data with discrete algebraic or fuzzy logic algorithms, and display the output numerically and graphically. Applications may also interpret the data to provide analyses to the user for aligning the prosthesis.
37 Citations
21 Claims
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1. A transducer, comprising:
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a transducer body; an adaptor on the transducer body for coupling to a prosthesis; a first strain-measuring device on the transducer to measure forces in a first plane; and a second strain-measuring device on the transducer to measure forces in a second plane substantially orthogonal to the first plane; wherein the first and the second strain-measuring devices are arranged to reduce measuring forces in a third plane orthogonal to the first and second planes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A computerized prosthesis alignment system for coupling to a prosthesis, comprising:
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a transducer for coupling to the prosthesis to measure anterior/posterior moments and right/left moments; and a master unit coupled to the transducer for communicating with a host computer. - View Dependent Claims (15, 16, 17, 18)
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19. A modified pyramid adaptor for coupling to a prosthesis, comprising:
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an adaptor body; and an inverted pyramid supported by the adaptor body; wherein the inverted pyramid is supported by beams having strain gages to measure anterior/posterior moments and right/left moments.
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20. A prosthesis, comprising:
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a prosthesis socket for receiving a limb; and a transducer, wherein the transducer comprises means for measuring moments affecting the prosthesis socket in a first and second plane, wherein the first and second plane are orthogonal to each other. - View Dependent Claims (21)
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Specification