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US4245629A Expired / Lapsed US ⏱️ 0.0 years remaining

Knee and elbow joint protector

Assignee: Individual
•
Filing: 1978-12-13
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Granted: 1981-01-20
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Expires: 1998-12-13
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Abstract

Abstract This invention is an implement for (1) preventing injuries to human knees by absorbing and spreading an external blow and (2) orthopedic procedures for therapy and rehabilitation. The concept is a (A) floating rocker connection axis beside the leg joint, which connects to (B) substantially rigid tongues encased in (C) substantially rigid sleeves fitted to the limbs above and below the rocker connection, appropriately padded for comfortable fit and wrapped with conventional taping. As the leg bends the tongues slide randomly in respective sleeves and the rocker connection adjusts to the pulls and pushes of the tongues, floating with the limb joint's natural hinge. One embodiment employs multiple narrow tongues for differential sliding inside the sleeves for easier more flexible motion in non-contact service. The single wide tongues of a second embodiment, more rigid and restrictive, are for therapeutic locking of desired positions of limbs, and for contact sports where units on both sides of a joint are securely wrapped for impact and twists. The rocker connection and tongues component is used for all applications; the sleeve with curved outside surfaces is (A) directly fitted to arm limbs or (B) attached to a fitted curved wrap plate for leg applications. Reversing one side's direction of bend for units on each side of a limb joint locks the entire limb straight, in effect an "open air" cast. A simple adjustment in the rocker connection enables locking of the bent limb in any position up to 90 degrees. Hyper-extension limb injuries can be prevented and excessive limb twisting is controlled, by the one-way bend limitation of each unit. For simplicity and brevity hereinafter, discussion will focus on the knee only, elbow references being implied.

Inventors

  • 👤 Alfred B. Cummins

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-23 10:10
CPC Classifications
A; A63; A63B; A63B71/00; A63B71/08; A63B71/12; A63B71/1225; A61; A61F; A61F5/00; A61F5/01; A61F5/0102; A61F5/0123; A63B2071/125

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 216 words
A knee joint protector consisting of a rocker connection member adapted for placement on one side of a human knee joint, two planar linear rigid tongues each about 1/4 inch thick and about 1.50 inches wide and each pivotally connected at one end to said rocker connection member, the other end of one of said tongues in position to extend along a limb immediately above said knee joint, the other end of the other of said tongues in position to extend along a limb immediately below said knee joint, a separate rigid unitary sleeve having two open ends and surrounding each tongue sufficiently close to permit free longitudinal sliding movement of said tongues in said sleeves but to prevent twisting of said tongues in said sleeves about said pivotal connections, said sleeves adapted to be firmly attached to the limb in such positions at desired locations related respectively to the knee joint, and said tongues and said connections between said rocker connection member and said tongues permitting substantially free bending of the joint normally with compensating free sliding of said tongues in said sleeves but with portions engaging between said rocker connection and said tongues preventing reverse bending of the joint when said tongues on opposite sides of said rocker connection member are substantially in alinement.
Claim 2
Dependent Claim 216 words
A knee joint protector consisting of a rocker connection member adapted for placement on one side of a human knee joint, two planar linear rigid tongues each about 1/4 inch thick and about 1.50 inches wide and each pivotally connected at one end to said rocker connection member, the other end of one of said tongues in position to extend along a limb immediately above said knee joint, the other end of the other of said tongues in position to extend along a limb immediately below said knee joint, a separate rigid unitary sleeve having two open ends and surrounding each tongue sufficiently close to permit free longitudinal sliding movement of said tongues in said sleeves but to prevent twisting of said tongues in said sleeves about said pivotal connections, said sleeves adapted to be firmly attached to the limb in such positions at desired locations related respectively to the knee joint, and said tongues and said connections between said rocker connection member and said tongues permitting substantially free bending of the joint normally with compensating free sliding of said tongues in said sleeves but with portions engaging between said rocker connection and said tongues preventing reverse bending of the joint when said tongues on opposite sides of said rocker connection member are substantially in alinement.
Claim 3
Dependent Claim 40 words
A knee joint protector as defined in claim 1, wherein said connections between said rocker connection member and said tongues provides a clearance for such normal bending movement, and provides tightly engaging surfaces preventing opposite bending of the knee joint.
Claim 4
Dependent Claim 44 words
A knee joint protector as defined in claim 1, wherein said connections between said rocker connection member and said tongues provide a clearance for such normal bending movement, and provides a fixed pin in said rocker connection member preventing reverse bending of the joint.
Claim 5
Dependent Claim 31 words
A knee joint protector as defined in claim 1, wherein said tongues have at least four to five inches inside said sleeves which are open ended for longer tongues to extend.
Claim 6
Dependent Claim 57 words
A knee joint protector as defined in claim 1, wherein said tongues and said connections between said rocker connection member and said tongues are so arranged that in said position for preventing reverse bending said tongues on opposite sides of said rocker connecting member are in less than a true alinement position by about 5° to 10°.
Claim 7
Dependent Claim 116 words
Two knee joint protectors as defined in claim 1, each joint protector having a rocker connection member and two linear rigid tongues each pivotally connected at one end to said rocker connection member, and a separate rigid unitary sleeve surrounding each of said tongues sufficiently close to permit free longitudinal sliding movement of each tongue in its associated sleeve but to prevent twisting of said tongues in said sleeve about said pivotal connections, whereby said joint protectors may be assembled closely alongside opposite sides of a knee with said four sleeves tightly bound to the leg, thus permitting substantially free bending of said knee joint normally with compensating sliding of said tongues in their associated sleeves.

References Cited (Backward Citations)

US552143A Cited
US1660721A Cited
US2632440A Cited
US2959168A Cited
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USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1984-01-20 1984-07-21 1985-01-20 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1988-01-20 1988-07-21 1989-01-20 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1992-01-20 1992-07-21 1993-01-20 $7700.00 Window Closed / Lapsed

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