Instrumented prosthetic foot

• US 9,526,636 B2
• Filed: 08/26/2010
• Issued: 12/27/2016
• Est. Priority Date: 11/18/2003
• Status: Active Grant

• Current Assignee: Victhom Laboratory Inc (Ergoresearch Ltd.)
• Original Assignee: Victhom Laboratory Inc (Ergoresearch Ltd.)
• Inventors: Bdard, Stphan, Roy, Pierre-Ollvier
• Primary Examiner(s): Matthews, Howie
• Application Number:
  US12/869,559
• Publication Number:
  US 20110130847A1
• Time in Patent Office: 2,315 Days
• Field of Search: 623/24, 623 46- 57
• US Class Current: 1/1
• CPC Class Codes: A61F 2/60 Artificial legs or feet or parts thereof
• CPC Class Codes: A61F 2/66 Feet; Ankle joints
• CPC Class Codes: A61F 2/72 Bioelectric control, e.g. myoelectric
• CPC Class Codes: A61F 2002/5001 Cosmetic coverings
• CPC Class Codes: A61F 2002/5003 having damping means, e.g. shock absorbers for implantable joints A61F2002/30563
• CPC Class Codes: A61F 2002/5007 having elastic means different from springs, e.g. including an elastomeric insert elastic coating A61F2002/3007; springs A61F2002/5072; plate-like springs for feet A61F2002/6657
• CPC Class Codes: A61F 2002/6621 Toes
• CPC Class Codes: A61F 2002/6642 Heels
• CPC Class Codes: A61F 2002/665 Soles
• CPC Class Codes: A61F 2002/6685 S-shaped
• CPC Class Codes: A61F 2002/705 Electromagnetic data transfer for implantable prostheses A61F2250/0002
• CPC Class Codes: A61F 2002/7635 for measuring force, pressure or mechanical tension
• CPC Class Codes: A61F 2002/764 for measuring acceleration
• CPC Class Codes: A61F 2002/7685 located on natural or sound-site limbs, e.g. comparison measuring means

Abstract

The present invention discloses an instrumented prosthetic foot for use with an actuated leg prosthesis controlled by a controller, the instrumented prosthetic foot comprising a connector to connect the instrumented prosthetic foot to the leg prosthesis, an ankle structure connected to the connector, a ground engaging member connected to the ankle, at least one sensor for detecting changes in weight distribution along the foot, and an interface for transmitting signals from the sensor to the controller.

Claims

1. A prosthetic foot comprising:

an elongated foot plate;

a connector to operably connect the elongated foot plate to a user, the connector being connected in a manner that provides for multidirectional movement of the connector relative to the elongated foot plate;

at least one solid sensor positioned between the connector and the elongated foot plate and positioned directly beneath the connector, the at least one solid sensor comprising a deformable material to provide for said multidirectional movement and configured to measure load on the prosthetic foot based on deformation of the deformable material; and

a controller in communication with the at least one sensor and configured to communicate control signals to a device separate from the prosthetic foot based on data from the at least one sensor.

2. The prosthetic foot of claim 1, wherein the connector comprises a pyramid connector to removably connect the prosthetic foot to the user.

3. The prosthetic foot of claim 1, wherein the at least one solid sensor is free of other load-bearing elements.

4. A prosthetic foot comprising:

an elongated foot plate;

a connector to operably connect the elongated foot plate to a user, the connector being connected in a manner that provides for multidirectional movement of the connector relative to the elongated foot plate;

at least one solid sensor positioned between the connector and the elongate foot plate and configured to measure load on the prosthetic foot; and

a controller configured to communicate control signals to a device separate from the prosthetic foot at least partially based on an input from the at least one solid sensor.

5. The prosthetic foot of claim 4, wherein the at least one solid sensor is in contact with the connector and the elongate foot plate, the at least one solid sensor comprising a deformable material to provide for said multidirectional movement.

6. The prosthetic foot of claim 4, wherein the at least one sensor senses the load in any direction.

7. The prosthetic foot of claim 4, wherein the at least one sensor is in communication with the controller by a wired connection.

8. The prosthetic foot of claim 4, wherein the at least one sensor is in communication with the controller by a wireless connection.

9. The prosthetic foot of claim 4, wherein the at least one sensor comprises a pair of load sensors, wherein the pair of load sensors is free of other load-bearing elements.