Title:
SYSTEM FOR CONTROLLING PROSTHETIC LEG
Document Type and Number:
Japanese Patent JP3131933
Kind Code:
B2
Abstract:
PURPOSE: To smoothly descend stairs, sit and so forth, by measuring a strain of the lower part of a foot and a knee angle with the use of a sensor provided in a prosthetic leg, and by controlling a valve assembly relating to a hydraulic damper with the use of a computer means in response to a measured value by the sensor.
CONSTITUTION: In an artificial leg composed of upper and lower foot components, a joint for coupling a knee, and extending forward from the knee, a linear hydraulic damper B for variably damping rotational motions for bending and extending the knee joint, respectively, independent from each other, an electronic detecting means 13 for measuring strains of the upper and lower foot components of a prosthetic leg, and delivering output signals indicating thus measured values, to a computer means in order to compare them with a threshold value selected for adjusting at least one of the bending or extension and exhibiting a predetermined transient point. When the measured value is substantially coincident with the threshold value, an actuating means 16 is energized to adjust the damper B in order to change the damping force of the knee joint for bending and extension.
Inventors:
Kelvin B. James
Application Number:
JP30791492A
Publication Date:
February 05, 2001
Filing Date:
October 23, 1992
Export Citation:
Assignee:
Otto Bock Ortopediche Industrie Vezitz-Unt Fair Baltunks Gameem Behr und Companie Commandit Gesellschaft
International Classes:
A61F2/60; A61F2/70; A61F2/64; A61F2/68; B62D57/00; A61F2/50; A61F2/74; A61F2/76; (IPC1-7): A61F2/64; A61F2/68
Domestic Patent References:
| JP1244747A | ||||
| JP1244748A | ||||
| JP62222445A |
Attorney, Agent or Firm:
Takehiko Suzue