Prosthetic foot with rocker member

• US 20050137717A1
• Filed: 12/18/2003
• Published: 06/23/2005
• Est. Priority Date: 12/18/2003
• Status: Abandoned Application

• Current Assignee: Ossur hf
• Original Assignee: Ossur hf
• Inventors: Asgeirsson, Sigurdur, Ragnarsdottir, Heidrun Gigja, Gramnas, Finn
• Application Number:
  US10/742,455
• Publication Number:
  US 20050137717A1
• Time in Patent Office: Days
• US Class Current: 623/38
• CPC Class Codes: A61F 2/66 Feet; Ankle joints
• CPC Class Codes: A61F 2/6607 Ankle joints
• CPC Class Codes: A61F 2/74 fluid , i.e. hydraulic or pneumatic
• CPC Class Codes: A61F 2/748 Valve systems
• CPC Class Codes: A61F 2002/30359 Pyramidally- or frustopyramidally-shaped protrusion and recess
• CPC Class Codes: A61F 2002/30467 using hook and loop-type fasteners
• CPC Class Codes: A61F 2002/5006 Dampers, e.g. hydraulic damper
• CPC Class Codes: A61F 2002/5007 having elastic means different from springs, e.g. including an elastomeric insert
• CPC Class Codes: A61F 2002/5055 Reinforcing prostheses by embedding particles or fibres during moulding or dipping, e.g. carbon fibre composites
• CPC Class Codes: A61F 2002/6621 Toes
• CPC Class Codes: A61F 2002/6642 Heels
• CPC Class Codes: A61F 2002/6671 C-shaped
• CPC Class Codes: A61F 2220/0033 made by longitudinally pushing a protrusion into a complementary-shaped recess, e.g. held by friction fit
• CPC Class Codes: A61F 2220/0083 using hook and loop-type fasteners

Abstract

A prosthetic foot comprises a foot member, a rocker member connected in cantilever fashion to the foot member, and an ankle module movably connected to the rocker member about an axis, wherein an anterior section of the rocker member is configured to roll-up onto the foot member an amount corresponding to the load applied on the foot, and wherein the foot member is configured to facilitate the initial roll-up of the rocker member.

Claims

1. A prosthetic foot comprising:

a foot member having a toe section, an intermediate section and a heel section, and defining a length between the toe section and the heel section;

a rocker member having a posterior section and an elongated anterior section and defining a length therebetween, the posterior section connected to the heel section, the anterior section configured to move relative to the foot member;

an ankle module pivotally connected to the rocker member, the ankle module having an anterior portion and a posterior portion;

a front bumper disposed between the anterior portion of the ankle module and the anterior section of the rocker member; and

a rear bumper disposed between the posterior portion of the ankle module and the posterior section of the rocker member.

2. The prosthetic foot of claim 1, wherein the front bumper is removably disposed between the anterior portion of the ankle module and the anterior section of the rocker member.

3. The prosthetic foot of claim 1, wherein at least a portion of the front bumper is configured to compress when the anterior portion of the ankle module moves toward the anterior section of the rocker member.

4. The prosthetic foot of claim 1, wherein the rear bumper is removably disposed between the posterior portion of the ankle module and the posterior section of the rocker member.

5. The prosthetic foot of claim 1, wherein at least a portion of the rear bumper is configured to compress when the posterior portion of the ankle module moves toward the posterior section of the rocker member.

6. The prosthetic foot of claim 1, wherein the rocker member has a recessed surface.

7. The prosthetic foot of claim 1, wherein the anterior section of the rocker member is tapered.

8. The prosthetic foot of claim 1, wherein the posterior section of the rocker member is tapered.

9. The prosthetic foot of claim 1, wherein the rocker member defines a roll-up surface defining a longitudinal slot between the rocker member and the foot member.

10. The prosthetic foot of claim 9, wherein the roll-up surface is inclined relative to the foot member.

11. The prosthetic foot of claim 10, wherein the roll-up surface is inclined at an angle of between about 10 degrees and about 20 degrees.

12. The prosthetic foot of claim 9, wherein the roll-up surface has a length of between about 10% and about 70% of the length of the rocker member.

13. The prosthetic foot of claim 1, wherein the length of the rocker member is greater than about 50% of the length of the foot member.

14. A prosthetic foot comprising:

a foot member having a toe section, an intermediate section and a heel section, wherein the heel section has a thickness that tapers from the intermediate section toward the heel section; and

a rocker member having an anterior section and a posterior section, the posterior section connected to the heel section, the anterior section configured to move relative to the foot member for increased flexion of the foot member, wherein the tapered thickness of the heel section of the foot member facilitates the motion of the rocker member relative to the foot member.

15. The prosthetic foot of claim 14, wherein at least a portion of the anterior section of the rocker member is a roll-up surface and defines a longitudinal slot between the rocker member and the foot member.

16. The prosthetic foot of claim 15, wherein the roll-up surface is inclined relative to the foot member.

17. The prosthetic foot of claim 16, wherein the roll-up surface is inclined at an angle of between about 10 degrees and about 20 degrees.

18. The prosthetic foot of claim 16, wherein the roll-up surface has a length of between about 10% and about 70% of the length of the rocker member.

19. The prosthetic foot of claim 14, wherein the anterior section of the rocker member is tapered to facilitate insertion into and removal from a cosmesis.

20. The prosthetic foot of claim 14, wherein the rocker member is removably connected to the heel section.

21. The prosthetic foot of claim 14, further comprising an ankle module pivotally connected to the rocker member, the ankle module having a housing configured to slidingly receive an anterior piston and a posterior piston, the ankle module also having a pyramid configured to receive a pylon thereon and an actuator configured to receive a force, wherein selective actuation of the actuator allows the housing to be selectively moved relative to the pistons.

22. The prosthetic foot of claim 21, further comprising a front bumper removably disposed between the anterior piston of the ankle module and the anterior section of the rocker member, wherein at least a portion of the front bumper is configured to compress.

23. The prosthetic foot of claim 21, further comprising a rear bumper removably disposed between the posterior piston of the ankle module and the posterior section of the rocker member, wherein at least a portion of the rear bumper is configured to compress.

24. The prosthetic foot of claim 21, wherein the pyramid is configured to be selectively positioned at at least one angle relative to a support surface upon application of the force to said actuator, said positioning at at least one angle varying a height of the heel section relative to the support surface when the pyramid is oriented generally orthogonal to the support surface.

25. A prosthetic foot comprising:

a foot member;

a rocker member connected to the foot member, the rocker member including at least one surface capable of moving relative to the foot member when the prosthetic foot is in use;

an ankle module pivotally connected to the rocker member, and

at least one bumper disposed between the ankle module and the rocker member.

26. The prosthetic foot of claim 25, wherein the at least one bumper includes a front bumper and a rear bumper.

27. The prosthetic foot of claim 26, wherein the front bumper is positioned anterior to a pivot point between the ankle module and the rocker member.

28. The prosthetic foot of claim 25, wherein the foot member extends from a heel section to a toe section.

29. The prosthetic foot of claim 25, wherein the rocker member is connected solely at a posterior section thereof to a posterior section of the foot member.

30. The prosthetic foot of claim 25, wherein at least a portion of an anterior section of the rocker member is a roll-up surface and defines a longitudinal slot between the rocker member and the foot member.

31. The prosthetic foot of claim 30, wherein the roll-up surface is inclined relative to the foot member.

32. The prosthetic foot of claim 31, wherein the roll-up surface is inclined at an angle of between about 10 degrees and about 20 degrees.

33. The prosthetic foot of claim 30, wherein the roll-up surface has a length of between about 10% and about 70% of the length of the rocker member.

34. The prosthetic foot of claim 25, wherein the rocker member defines a length between the front end and a rear end thereof, and wherein said length of the rocker member is greater than about 50% of the length of the foot member.

35. A prosthetic foot comprising:

a foot member;

a rocker member having a front end extending forward of a midline of the foot member, the rocker member including at least one surface capable of moving relative to the foot member when the prosthetic foot is in use.

36. The prosthetic foot of claim 35, further comprising an ankle module pivotally connected to the rocker member.

37. The prosthetic foot of claim 36, further comprising at least one bumper disposed between the ankle module and the rocker member.

38. The prosthetic foot of claim 37, wherein the at least one bumper includes a front bumper and a rear bumper.

39. The prosthetic foot of claim 38, wherein the front bumper is positioned anterior to a pivot point between the ankle module and the rocker member.

40. The prosthetic foot of claim 35, wherein the rocker member defines a length between the front end and a rear end thereof, and wherein said length of the rocker member is greater than about 50% of the length of the foot member.

41. A prosthetic foot comprising:

a foot member having a toe section and a heel section;

a rocker member connected to the foot member, the rocker member including at least one surface capable of moving relative to the foot member when the prosthetic foot is in use; and

an ankle module operatively connected to the foot member and selectively adjustable to change the height of the heel section relative to a support surface that operatively contacts the foot member.

42. The prosthetic foot of claim 41, wherein the ankle module has an actuator configured to selectively lock the module in a desired position, and configured to selectively allow the ankle module to be repositioned relative to the foot member to change the height of the heel section.