Leg brace for controlling subluxation

• US 4,624,247 A
• Filed: 12/23/1985
• Issued: 11/25/1986
• Est. Priority Date: 01/22/1985
• Status: Expired due to Fees

• Current Assignee: Medical Designs, Inc. (Sparta Surgical Corp.)
• Original Assignee: Medical Designs, Inc. (Sparta Surgical Corp.)
• Inventors: Ford, Edward I.
• Primary Examiner(s): Cline, William R.
• Application Number:
  US06/812,008
• Time in Patent Office: 337 Days
• Field of Search: 128/80 R, 128/80 C, 128/80 F, 128/80 H, 128/87 R, 128/88, 2/22, 2/24
• US Class Current: 602/26
• CPC Class Codes: A61F 2005/0167 adjustable
• CPC Class Codes: A61F 5/0102 specially adapted for correcting deformities of the limbs or for supporting them; Ortheses, e.g. with articulations

Abstract

An improvement in a knee brace for alleviating problems with tibia rotation, subluxation and migration with respect to a femur of a wearer, including conventional first and second pairs of elongate braces having their respective hinges connected at their central ends, characterized by the improvement in the form of a plurality of 8 flexible, inelastic, non-metallic bands connected at the plurality of points of fixation anteriorly and posteriorly of the respective braces for tightening to fit any leg and lie close to the leg. In a preferred embodiment, the respective plurality of straps connected to their respective D-rings anteriorly and posteriorly of the braces include a de-rotation pad for being held tightly adjacent the tibia at the inside anterior of the tibia to prevent rotation of the tibia. In still more preferred embodiments, a cover of Ensolite foam is provided for the hinge and braces to allow the knee brace to be used in sports; and the hinge has diverging slots for facilitating access to the limiters of the degrees of flexion and extension. By this structure, one size can fit all, either right or left legs and the universal adjustability of all facets and elements make for a flexibility and freedom without loss of support (not heretofore available).

Claims

1. In a knee brace for alleviating problems with tibia rotation, subluxation and migration with respect to a femur of the wearer, characterized by:

a. first and second pairs of elongate braces with each of said braces being rotationally stiff so as to resist both torsion and bending forces;

said first pair of braces being adapted to lie on opposite sides of the wearer'"'"'s thigh and said second pair of braces being adapted to lie on opposite sides of the wearer'"'"'s calf;

b. a pair of respective hinge means connected respectively with the first and second pairs of braces at their respective central ends for allowing and controlling flexion and extension of the wearer'"'"'s leg, and

c. means for adjustably placing and holding respective pairs of elongate braces at desired attained positions on respective opposite sides of the wearer'"'"'s thigh and calf with said hinge means positioned correctly adjacent the wearer'"'"'s knee;

the improvement comprising;

d. a plurality of eight flexible, inelastic, non-metallic straps that are fully adjustable and adapted to fit any size leg;

e. a plurality of 16 attaching D-ring means for affixing respective straps, 8 said D-ring means being connected at the anterior of said braces above and below said hinges and a plurality of 8 said D-ring means being connected at the posterior above and below said hinges;

said D-ring means being connected with said braces and defining respective individual points for affixing said plurality of the 8 straps above and below said hinge means such that one size fits any leg, controls subluxation and distal migration and compensates for laxity of ligaments in the leg; and

f. a plurality of two contoured condyle pads on each side interiorly of each respective said hinge means, each pair of said two condyle pads allowing each segment of the leg to flex independently of the other without bunching either said condyle pad with respect to said condyle of either the tibia or the femur;

said condyle pads being shaped, respectively, to fit the supracondylar regions of the tibia and femur, respectively, such that they support the condyle regardless of flexion or extension of the tibia with respect to the femur;

said pads being disposed interiorly of and respectively connected with said straps and said pairs of braces for comfort of the wearer.

2. The knee brace of claim 1 wherein an adjustably placed wedge is attached to the bottom interior strap by Velcro and is movable circumferentially to a desired position for comfort and to control rotation of said tibia when said bottom interior is tightened in conjunction with said bottom posterior strap.

3. The knee brace of claim 1 wherein said condyle pads are two respective interior contoured plastic foam pads affixed to semi-rigid plastic interiorly of two longitudinally exterior pads affixed to the same type of semi-rigid plastic, the semi-rigid plastic being connected with said braces and said hinge means on each side of the brace so as to be held in place by said fully adjustable straps to fit any wearer'"'"'s leg.

4. The knee brace of claim 3 wherein semi-rigid plastic is connected longitudinally of said braces with a second sheet of properly shaped plastic of same material connected interiorly of said first sheet of plastic and said braces and said hinge;

each set of anterior straps has 8 D-ring means at the anterior and each set of posterior straps has 8 D-ring means at the posterior of said plastic for affixing of said flexible inelastic straps with the desired degree of tension and wherein there are 8 points of fixation with 16 respective Dring means for affixing said posterior and anterior inelastic straps; and

wherein each strap has a plastic foam pad interiorly thereof for the comfort of the wearer.

5. The knee brace hinge of claim 1 wherein respective plastic foam covers 1/2 inch (") minimum thickness are provided for the right and left sides of the respective hinge means and respective braces such that said knee brace can be worn in sports activities without injury to other players.

6. The knee brace of claim 1 wherein each said hinge means has a single engaged cam and slot for simulating flexural motion of the wearer'"'"'s knee and has a positive lock in the form of respective flexible plunger means that are movably disposed in respective ends of respective longitudinal slots and terminate in respective threaded bores with respective threaded nuts that are rotatably screwable into said respective threaded bores for moving said flexible plungers for restraining the movement of said cam, said bores diverging outwardly at an angle to facilitate access to the respective threadced nuts;

said threaded nuts having associated indices and indicators for indicating the degrees of flexural motion permitted by said nuts and plungers.