US 11,911,298 B2
Robust adaptable foot prosthesis
Murray E. Maitland, Seattle, WA (US); Matthew M. Wernke, Seattle, WA (US); Evandro M. Ficanha, Seattle, WA (US); and James M. Colvin, Seattle, WA (US)
Assigned to University of Washington, Seattle, WA (US); and The Ohio Willow Wood Company, Mt. Sterling, OH (US)
Filed by University of Washington, Seattle, WA (US); and The Ohio Willow Wood Company, Mt. Sterling, OH (US)
Filed on Jun. 15, 2021, as Appl. No. 17/347,785.
Application 17/347,785 is a continuation of application No. 15/925,574, filed on Mar. 19, 2018, granted, now 11,076,970.
Application 15/925,574 is a continuation in part of application No. 15/154,515, filed on May 13, 2016, granted, now 9,918,855, issued on Mar. 20, 2018.
Claims priority of provisional application 62/161,791, filed on May 14, 2015.
Prior Publication US 2021/0307939 A1, Oct. 7, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. A61F 2/66 (2006.01); A61F 2/50 (2006.01)
CPC A61F 2/6607 (2013.01) [A61F 2/66 (2013.01); A61F 2002/5003 (2013.01); A61F 2002/5009 (2013.01); A61F 2002/5018 (2013.01); A61F 2002/5043 (2013.01); A61F 2002/5072 (2013.01); A61F 2002/6614 (2013.01); A61F 2002/6621 (2013.01); A61F 2002/6642 (2013.01); A61F 2002/665 (2013.01); A61F 2002/6664 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A prosthetic foot device comprising:
a linkage system comprising:
an upper portion including a first contact surface;
a lower portion having a second contact surface that contacts the first contact surface;
a first pin having a first end and a second end, wherein the first pin is positioned through a first through-hole in the lower portion and further through a second through-hole in the upper portion; and
a second pin having a first end and a second end, wherein the second pin is positioned through a third through-hole in the lower portion and further through a fourth through-hole in the upper portion, wherein the lower portion is rotatably coupled to the upper portion via the first pin and the second pin such that the lower portion rotates from a first position in which a top surface of the lower portion and a bottom surface of the lower portion are parallel to one another to a second position in which a non-zero angle exists between the top surface of the upper portion and the bottom surface of the lower portion, wherein the first through-hole in the lower portion comprises a first curved slot having a first width greater than a first diameter of the first pin such that the first pin moves laterally within the first curved slot as the lower portion rotates with respect to the upper portion from the first position to the second position, wherein the third through-hole in the lower portion comprises a second curved slot having a second width greater than a second diameter of the second pin such that the second pin moves laterally within the second curved slot as the lower portion rotates with respect to the upper portion from the first position to the second position, and wherein the second through-hole and the fourth through-hole in the lower portion each comprise a cylindrical through-hole.