US 11,951,060 B2
Foot stretching and diagnosis device, and method for calculating stiffness of foot
Hyungsoon Park, Daejeon (KR); and Yusung Kim, Daejeon (KR)
Assigned to Korea Advanced Institute of Science and Technology, Daejeon (KR)
Appl. No. 16/625,067
Filed by Korea Advanced Institute of Science and Technology, Daejeon (KR)
PCT Filed Dec. 19, 2019, PCT No. PCT/KR2019/018063
§ 371(c)(1), (2) Date Sep. 10, 2020,
PCT Pub. No. WO2020/251126, PCT Pub. Date Dec. 17, 2020.
Claims priority of application No. 10-2019-0068969 (KR), filed on Jun. 11, 2019.
Prior Publication US 2021/0353492 A1, Nov. 18, 2021
Int. Cl. A61H 1/02 (2006.01)
CPC A61H 1/0266 (2013.01) [A61H 2001/027 (2013.01); A61H 2201/1215 (2013.01); A61H 2201/1642 (2013.01); A61H 2201/5069 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A foot stretching device comprising:
a motor unit;
a footrest unit including a lower footrest configured to be rotated about a first rotation axis, an upper footrest configured to be rotated about a second rotation axis and a connecting member connecting the upper footrest and the lower footrest; and
a coupling unit including an arm portion rotated by the motor unit and a rotary coupler coupled to the upper footrest,
wherein the upper footrest is configured to be rotated by a predetermined angle about the second rotation axis by the rotation of the arm portion, and
the lower footrest is configured not to rotate about the first rotation axis by rotation of the arm portion until the upper footrest is rotated by the predetermined angle.