US 5,324,241 AGranted

Knee rehabilitation exercise device

OwnerPaul Artigues, Michael Banyasinventors

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Abstract

A pedal crank has a throw adjuster comprised of two triangular frames in opposed relationship to a common triangular base that is variable in length. A pedal crank is formed with a peak of a proximal triangular frame attached to a crank axle and a peak of a distal triangular frame attached to a pedal axle. A fixed side of the proximal triangular frame is attached rigidly to the crank axle and a floating side of the proximal triangular frame is attached rotationally to the crank axle. A fixed side of the distal triangular frame is attached rigidly to the pedal axle and a floating side of the distal triangular frame is attached rotationally to the pedal axle. The fixed side of the proximal triangular frame and the fixed side of the distal triangular frame are attached to opposite ends of the common triangular base. Both sides of both triangles are attached pivotally to the common triangular base that is variable in length with a screw shaft, a fluid-operated cylinder, or other length-adjustment means. In an exerciser embodiment, the crank axle is in chain drive relationship to an electrical, fluid or frictional resistor of rotation that is variable in rotational resistance. A calibrator of throw length is positioned parallel to the common base.

Claims15

Dependent claims

A pedal-crank-throw-adjuster mechanism comprising:

a pedal-operable device,
a crank axle attached rotationally to the pedal-operable device at an operable position in relation to a seat on the pedal-operable device,
first and second pedal cranks that are oppositely disposed in pedal-crank relationship on the crank axle,
each of the first and second pedal cranks having a proximal triangular frame and a distal triangular frame that are oppositely disposed in a common plane and have a common base side that is adjustable in length,
a fixed side of the proximal triangular frame of each pedal crank having a peak end attachable rigidly to the crank axle and a base end attachable pivotally to the common base side,
a floating side of the proximal triangular frame of each pedal crank having a peak end attachable pivotally to the crank axle and a base end attachable pivotally to the common base side,
a fixed side of the distal triangular frame of each pedal crank having a peak end attachable rigidly to a pedal axle and a base end attachable pivotally to the common base side,
a floating side of the distal triangular frame of each pedal crank having a floating side attachable pivotally to the pedal axle and a base end attachable pivotally the common base side,
a pedal attachable rotationally to each of the pedal axles, and
a power-takeoff wheel attachable to the crank axle.

7 more elements

Dependencies are inferred from the claim text.

Facts

Application: 08/136,802Filed 14 Oct 1993
Granted: 28 Jun 1994
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

B62M 3/02
Construction of cranks operated by hand or foot: of adjustable length
A63B 22/0046
Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements: details of…
A63B 22/0605
With support elements performing a rotating cycling movement, i.e. a closed path movement: performing a circular movement, e.g. ergometers
A63B 2022/0623
Particular details or arrangement of cranks: cranks of adjustable length