US 9,808,290 B2
Transcutaneous joint unloading device
Michael E. Landry, Austin, TX (US); Anton G. Clifford, Mountain View, CA (US); and Joshua Makower, Los Altos, CA (US)
Assigned to MOXIMED, INC., Hayward, CA (US)
Filed by Michael E. Landry, Austin, TX (US); Anton G. Clifford, Mountain View, CA (US); and Joshua Makower, Los Altos, CA (US)
Filed on Jun. 13, 2012, as Appl. No. 13/495,440.
Claims priority of provisional application 61/504,886, filed on Jul. 6, 2011.
Prior Publication US 2013/0013067 A1, Jan. 10, 2013
Int. Cl. A61B 17/68 (2006.01); A61B 17/56 (2006.01); A61B 17/64 (2006.01); A61B 17/80 (2006.01); A61B 17/86 (2006.01)
CPC A61B 17/683 (2013.01) [A61B 17/56 (2013.01); A61B 17/6425 (2013.01); A61B 17/80 (2013.01); A61B 17/86 (2013.01); A61B 2017/564 (2013.01); A61B 2017/567 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A transcutaneous unloading device for a joint formed between first and second members, the device comprising:
a load absorber having a first and a second mating portion, a load absorbing portion disposed between the first and the second mating portions, and the load absorbing portion comprising a load absorbing pivot;
a first percutaneous anchor having a first anchor portion configured to be affixed to the first member of the joint, a first anchor mating portion configured to mate with the first mating portion, and an axis extending between the first anchor portion and the first anchor mating portion; and
a second percutaneous anchor having a second anchor portion configured to be affixed to the second member of the joint, a second anchor mating portion configured to mate with the second mating portion, and an axis extending between the second anchor portion and the second anchor mating portion;
wherein the first and second mating portions and the first and second anchors are configured so that the load absorbing portion is disposed externally of a user's skin when the device is mounted to the first and second joint members and so that the load absorbing pivot is pivotable at least about an axis parallel with an axis of at least one of the first and second percutaneous anchors;
wherein, between said load absorbing pivot and said second anchor mating portion, the load absorber extends along an axis and is inflexible away from said axis;
wherein the load absorber comprises
a rigid arbor extending along said single axis,
a rigid piston at least partially inside the rigid arbor and movable therein along said single axis, and
a spring positioned over the piston and over the arbor and movable relative thereto along said single axis.