Brace hinge with telescoping condyle pad
View Patent ↗A knee brace assembly is provided having an adjustable, pressure-applying gear system mounted to a portion of the hinge assembly. Through selective adjustment of the gear system, the knee brace assembly can apply pressure to a portion or portions of the knee joint, thereby relieving pressure on the knee joint. A method of treating a knee joint using a knee brace assembly including a planetary gear system is also provided.
1. A knee brace assembly comprising:
a hinge assembly;
a proximal arm pivotably engaging the hinge assembly;
a distal arm pivotably engaging the hinge assembly; and
a pad adjustment system comprising:
a first gear member operatively connected to a portion of the hinge assembly;
a second gear member engaged with the first gear member and configured to rotate within the pad adjustment system;
a third gear member engaged with the second gear member and being actuatable by a user; and
a driven member operatively connected to the second gear member and configured to extend away from the hinge assembly upon actuation of the third gear member.
2. The knee brace assembly of claim 1 , wherein:
the first gear member is a sun gear operatively connected to a portion of the hinge assembly;
the second gear member is a planetary gear engaged with the sun gear, the planetary gear comprising a set of gear teeth and threaded grooves;
the third gear member is a ring gear engaged with the planetary gear;
the driven member is a threaded fastener partially received within the threaded grooves of the planetary gear; and
further comprising a telescoping plate connected to the fastener.
3. The knee brace assembly of claim 2 , wherein the pad adjustment system comprises at least one additional planetary gear configured to engage with and revolve around the sun gear.
4. The knee brace assembly of claim 2 , further comprising a base member configured to connect to the hinge assembly, and a sun gear tray integrally formed with the sun gear, the sun gear tray configured to connect to the base member.
5. The knee brace assembly of claim 4 , further comprising a ratchet mechanism between the sun gear tray and the ring gear.
6. The knee brace assembly of claim 2 , wherein the planetary gear is configured to both revolve about the sun gear and rotate about the planetary gear's own axis.
7. The knee brace assembly of claim 2 , wherein the threaded grooves are located on a fastener insert positioned in the planetary gear.
8. The knee brace assembly of claim 2 , wherein the ring gear comprises a set of gear teeth on an inner annular surface configured to contact the planetary gear.
9. The knee brace assembly of claim 2 , wherein the ring gear comprises at least one gripping surface along a radially outer surface.
10. The knee brace assembly of claim 9 , wherein the at least one gripping surface comprises a cup-shaped section of material on the ring gear.
11. The knee brace assembly of claim 1 , further comprising a locking member engaged with the third gear member by a locking ledge.
12. The knee brace assembly of claim 11 , wherein the locking ledge comprises a plurality of ratcheting protrusions configured to engage grooves on the third gear member.
13. The knee brace assembly of claim 12 , wherein the ratcheting protrusions resist rotation between the third gear member and first gear member in at least one direction.
14. The knee brace assembly of claim 2 , wherein the threaded fastener is configured to attach to the telescoping plate in a manner which prevents rotation of the threaded fastener.
15. The knee brace assembly of claim 1 , wherein the third gear member is rotatably actuatable by a patient or physician.
16. The knee brace assembly of claim 1 , further comprising a pad coupled to the driven member.
17. The knee brace assembly of claim 1 , further comprising a cover plate for a gear member.
18. The knee brace assembly of claim 1 , further comprising a cover stop configured to prevent the gear member from translating axially.
19. A knee brace assembly configured to off-load a patient's knee, comprising:
a gear system coupled to an inner side of a hinge assembly of the knee brace, the gear system comprising:
a first gear;
a plurality of second gears engaged with the first gear;
a third gear in rotating engagement with the second gears;
a telescoping plate engaged with the second gear by a coupling; and
wherein rotation of the third gear causes the telescoping plate to be displaced along the coupling.
20. A method for adjusting the amount of pressure applied to a knee joint comprising:
securing a gear system to an inner side of a hinge assembly of a knee brace;
turning, by hand, a knob of the gear system that engages with and simultaneously causes a plurality of revolving gear members to drive a telescoping plate towards or away from the knee joint; and
adjusting the position of the telescoping plate until a desired level of pressure against the knee joint is achieved.