Prosthetic foot with removable flexible members

• US 10,390,974 B2
• Filed: 05/05/2015
• Issued: 08/27/2019
• Est. Priority Date: 04/11/2014
• Status: Active Grant

• Current Assignee: Ossur hf
• Original Assignee: Ossur hf
• Inventors: Clausen, Arinbjorn Viggo, Andresson, Bjarni, Gunnarsson, Ragnar Orn, Lecomte, Christophe Guy, Sveinbjornsdottir, Maria Gudrun, Sandhal, David, Sverrisson, Atli Orn, Langlois, David
• Primary Examiner(s): Willse, David H
• Application Number:
  US14/704,117
• Publication Number:
  US 20150328020A1
• Time in Patent Office: 1,575 Days
• CPC Class Codes: A61F 2/66 Feet; Ankle joints
• CPC Class Codes: A61F 2/6607 Ankle joints
• CPC Class Codes: A61F 2/72 Bioelectric control, e.g. myoelectric
• CPC Class Codes: A61F 2/74 fluid , i.e. hydraulic or pneumatic
• CPC Class Codes: A61F 2002/5004 operated by electro- or magnetorheological fluids
• CPC Class Codes: A61F 2002/5006 Dampers, e.g. hydraulic damper
• CPC Class Codes: A61F 2002/5018 for adjusting angular orientation
• CPC Class Codes: A61F 2002/502 for adjusting length for implantable joints A61F2002/3055
• CPC Class Codes: A61F 2002/503 for adjusting elasticity, flexibility, spring rate or mechanical tension
• CPC Class Codes: A61F 2002/5038 Hinged joint, e.g. with transverse axle restricting the movement for implantable joints A61F2002/30624
• CPC Class Codes: A61F 2002/5069 Ball bearings
• CPC Class Codes: A61F 2002/5079 Leaf springs A61F2002/6657 takes precedence
• CPC Class Codes: A61F 2002/6614 Feet
• CPC Class Codes: A61F 2002/6657 having a plate-like or strip-like spring element, e.g. an energy-storing cantilever spring keel
• CPC Class Codes: A61F 2002/6664 Dual structures made of two connected cantilevered leaf springs
• CPC Class Codes: A61F 2002/6671 C-shaped
• CPC Class Codes: A61F 2002/701 operated by electrically controlled means, e.g. solenoids or torque motors
• CPC Class Codes: A61F 2002/7625 for measuring angular position
• CPC Class Codes: A61F 2002/7635 for measuring force, pressure or mechanical tension
• CPC Class Codes: A61F 2002/764 for measuring acceleration

Abstract

A prosthetic foot can include an attachment member, at least one first brace, at least one first flexible member, an unpowered actuator, at least one second brace, and at least one second flexible member. The attachment member can include a connector configured to connect the attachment member to a user or another prosthetic device. The at least one first brace can mount to the attachment member and the at least one first flexible member can connect to the attachment member by the at least one first brace such that a force between the ground and the attachment member can be supported by the at least one first flexible member. The unpowered actuator can mount to the attachment member and the at least one second brace can be mounted to the actuator. The at least one second flexible member can connect to the attachment member by the at least one second brace such that a force between the ground and the attachment member can be supported by the at least one second flexible member.

Claims

1. A prosthetic foot comprising:

an attachment member comprising a connector configured to connect the attachment member to a user or another prosthetic device;

at least one first brace mounted to the attachment member;

at least one first flexible member connected to the attachment member by the at least one first brace such that the first brace mounts around the first flexible member and a force between the ground and the attachment member can be supported by the at least one first flexible member;

an unpowered actuator mounted to the attachment member;

at least one second brace mounted to the actuator; and

at least one second flexible member connected to the attachment member by the at least one second brace such that the second brace mounts around the second flexible member and a force between the ground and the attachment member can be supported by the at least one second flexible member,

wherein at least one of the combination of the first brace and the first flexible member and the combination of the second brace and the second flexible member form a non-rotating joint between each other,

wherein the at least one first brace attaches to the attachment member by a rotatable joint, such that the first brace rotates relative to the attachment member about a single pivot.

2. The prosthetic foot of claim 1, wherein the at least one first brace comprises a slot that receives the flexible member and a divider separating the slot into two halves.

3. A prosthetic foot comprising:

an attachment member comprising a connector configured to connect the attachment member to a user or another prosthetic device;

at least one first brace mounted to the attachment member;

at least one first flexible member connected to the attachment member by the at least one first brace such that the first brace mounts around the first flexible member and a force between the ground and the attachment member can be supported by the at least one first flexible member;

an unpowered actuator mounted to the attachment member;

at least one second brace mounted to the actuator; and

at least one second flexible member connected to the attachment member by the at least one second brace such that the second brace mounts around the second flexible member and a force between the ground and the attachment member can be supported by the at least one second flexible member,

wherein at least one of the combination of the first brace and the first flexible member and the combination of the second brace and the second flexible member form a non-rotating joint between each other,

wherein the at least one second brace attaches to the actuator by a rotatable joint, such that the second brace rotates relative to the actuator about a single pivot.

4. The prosthetic foot of claim 3, wherein the at least one second brace comprises a slot that receives the flexible member and a divider separating the slot into two halves.

5. A prosthetic foot comprising:

an attachment member comprising a connector configured to connect the attachment member to a user or another prosthetic device;

at least one first brace mounted to the attachment member;

at least one first flexible member connected to the attachment member by the at least one first brace such that a force between the ground and the attachment member can be supported by the at least one first flexible member;

an unpowered actuator mounted to the attachment member;

at least one second brace mounted to the actuator;

at least one second flexible member connected to the attachment member by the at least one second brace and the actuator such that a force between the ground and the attachment member can be supported by the at least one second flexible member; and

at least one third flexible member mounted beneath the at least one second flexible member and extending at least from a heel portion to a metatarsal region of the prosthetic foot,

wherein at least a portion of one of the first brace and the second brace is flat at a portion of the first or second brace contacting the first or second flexible member, and

wherein the second and third flexible members define a space between the second and third flexible members, the space opening toward a posterior portion of the prosthetic foot such that the third flexible member can independently provide flexibility and resistance during heel strike.

6. The prosthetic foot of claim 5, wherein the first and second flexible members are removably coupled to the first and second braces.

7. The prosthetic foot of claim 5, wherein the actuator is configured to adjust a heel height of the prosthetic foot.

8. The prosthetic foot of claim 5, wherein the actuator comprises a bottle screw-type adjuster.

9. The prosthetic foot of claim 5, wherein the at least one second brace attaches to the actuator by a rotatable joint, such that the second brace rotates relative to the actuator.

10. The prosthetic foot of claim 5, wherein at least one first flexible member and at least one second flexible member are attached to each other along a foot portion at an adjustable location along their lengths.

11. A prosthetic foot comprising:

an attachment member comprising a connector configured to connect the attachment member to a user or another prosthetic device;

at least one first brace mounted to the attachment member;

at least one first flexible member connected to the attachment member by the at least one first brace such that a force between the ground and the attachment member can be supported by the at least one first flexible member;

an unpowered actuator mounted to the attachment member;

at least one second brace mounted to the actuator;

at least one second flexible member connected to the attachment member by the at least one second brace and the actuator such that a force between the ground and the attachment member can be supported by the at least one second flexible member; and

at least one third flexible member mounted beneath the at least one second flexible member and extending at least from a heel portion to a metatarsal region of the prosthetic foot,

wherein at least a portion of one of the first brace and the second brace is flat at a portion of the first or second brace contacting the first or second flexible member, and

wherein the at least one first brace attaches to the attachment member by a rotatable joint, such that the first brace rotates relative to the attachment member.

12. The prosthetic foot of claim 11, wherein the first and second flexible members are removably coupled to the first and second braces.

13. The prosthetic foot of claim 11, wherein the actuator is configured to adjust a heel height of the prosthetic foot.

14. The prosthetic foot of claim 11, wherein the actuator comprises a bottle screw-type adjuster.

15. The prosthetic foot of claim 11, wherein at least one first flexible member and at least one second flexible member are attached to each other along a foot portion at an adjustable location along their lengths.

16. The prosthetic foot of claim 11, wherein the at least one of the first brace and the second brace that is flat at a portion of the first or second brace contacting the first or second flexible member comprises a slot that receives the flexible member and a divider separating the slot into two halves.

17. A prosthetic foot comprising:

an attachment member comprising a connector configured to connect the attachment member to a user or another prosthetic device;

at least one first brace mounted to the attachment member;

at least one first flexible member connected to the attachment member by the at least one first brace such that a force between the ground and the attachment member can be supported by the at least one first flexible member;

an unpowered actuator mounted to the attachment member, the unpowered actuator being vertically-oriented when in an upright standing position;

at least one second brace mounted to the actuator; and

at least one second flexible member connected to the attachment member by the at least one second brace such that a force between the ground and the attachment member can be supported by the at least one second flexible member,

wherein at least one of the first brace mounts around and slides over the first flexible member at an end of the first flexible member and the second brace mounts around and slides over the second flexible member at an end of the second flexible member.

18. The prosthetic foot of claim 17, the prosthetic foot comprising one or more sensors configured to measure data indicative of a rotational position of a joint of the prosthetic foot.

19. The prosthetic foot of claim 17, further comprising one or more accelerometers configured to measure a velocity of the prosthetic foot in one or more directions.

20. The prosthetic foot of claim 17, further comprising one or more gyroscopes configured to measure an angular velocity of the prosthetic foot along one or more axes.

21. The prosthetic foot of claim 17, wherein the first and second flexible members are removably coupled to the first and second braces.

22. The prosthetic foot of claim 17, wherein the actuator is configured to adjust a heel height of the prosthetic foot.

23. The prosthetic foot of claim 17, wherein the actuator comprises a bottle screw-type adjuster.

24. The prosthetic foot of claim 17, wherein the at least one first brace attaches to the attachment member by a rotatable joint, such that the first brace rotates relative to the attachment member.

25. The prosthetic foot of claim 17, wherein the at least one second brace attaches to the actuator by a rotatable joint, such that the second brace rotates relative to the actuator.

26. The prosthetic foot of claim 17, wherein at least one first flexible member and at least one second flexible member are attached to each other along a foot portion at an adjustable location along their lengths.

27. The prosthetic foot of claim 17, wherein the at least one of the first brace mounting around and sliding over the first flexible member at an end of the first flexible member and the second brace mounting around and sliding over the second flexible member at an end of the second flexible member comprises a slot that receives the flexible member and a divider separating the slot into two halves.