Above & below knee prosthesis - leg coupler
OwnerArnold A. Lundinventor
Life of this patent
Estimating the term…
Abstract
A device to couple a prosthesis to a human leg stump above-the-knee in a first embodiment, and below the knee in the second embodiment. The device has an upper and a lower plate, the connecting mechanism being disposed in the lower plate. The upper plate is round and the same in both embodiments, but for above-the-knee junctions, the lower plate is elliptical while for below-the-knee junctions, the lower plate is round and of the same diameter as the upper plate. The operative connection is achieved by use of a guillotine, whose horizontally disposed blade engages one of a plurality of grooves on a locking stud. The movement of the spring-loaded guillotine is controlled by a retractable release pin to permit the guillotine to engage in or disengage the groove to which is disposed.
Claims20
A coupler for releasably connecting a leg prosthetic device to a sleeve having a projecting locking stud with the sleeve configured to received the stump of a leg, said coupler comprising:
- a body having a concave stud receiver disposed within a central bore of said body and retained therein, said stud receiver confining a pivotable guillotine, said locking stud having a plurality of axially spaced circumferential grooves, said stud adapted to extend into said stud receiver,
- which guillotine being moveable into a locking position wherein the guillotine extends into and engages one of said grooves of said stud, and a released position, retracted from said groove of said stud, in response to axial movement, and
- an actuator comprising a handled shaft connected to produce the axial movement of said guillotine between the engaged position with the locking stud and the released position spaced from the locking stud.
A coupler for releasably connecting a leg prosthetic device to a sleeve having a projecting locking stud with the sleeve configured to received the stump of a leg, said coupler comprising:
- a body comprising two interconnected plates, the upper of which is disk shaped and which overlays the lower plate, said body having a concave stud receiver disposed within a central bore of said body and retained therein, said stud receiver confining a pivotable guillotine, said locking stud having a plurality of axially spaced circumferential grooves, said stud adapted to extend into said stud receiver,
- which guillotine being moveable into a locking position wherein the guillotine extends into and engages one of said grooves of said stud, and a released position, retracted from said groove of said stud, in response to axial movement, and
- an actuator comprising a handled shaft connected to produce the axial movement of said guillotine between the engaged position with the locking stud and the released position spaced from the locking stud,
- further including means disposed on the opposite side of said guillotine from said actuator, which means includes a spring to return the guillotine to an engaged position subsequent to release caused by axial movement of the actuator.
A coupler for releasably connecting a leg prosthetic device to a sleeve having a projecting locking stud with the sleeve configured to received the stump of a leg, said coupler comprising:
- a body comprising two engaged plates, an upper plate and a lower plate, at least the upper one of which is a disk, which body has a concave stud receiver disposed within a central bore of said body and retained therein, said stud receiver confining a pivotable generally rectangular guillotine having an inwardly directed feathered edge, said locking stud having a plurality of axially spaced circumferential grooves, said stud adapted to extend into said stud receiver,
- which guillotine being moveable into a locking position wherein the guillotine's feathered edge extends into and engages one of said grooves of said stud, and a released position, retracted from said groove of said stud, in response to axial movement, and
- an actuator comprising a normally disposed drift pin retained handled shaft to produce the axial movement of said guillotine between the engaged position with the locking stud and the released position spaced from the locking stud.
Dependencies are inferred from the claim text.