Passive leg exerciser
First Claim
1. In a motorized leg exerciser, said exerciser including an adjustable framework of rods, a movable jointed rectangular limb support operably connected to said rod'"'"'s framework and a motor including a housing to activate periodic movement of said limb support, the improvement comprising:
- (a) a footrest movably attached to said limb support so as to adjust to the user'"'"'s leg length, said footrest including a foot pedal operably connected to an override switch;
(b) electrical override means operated by said override switch to stop said motor and reverse the direction of movement of said limb support;
(c) electrical means to stop said motor and reverse the direction of movement of said limb support,(d) preferential electrical timing means to cause a pause of a predetermined length each time said override means or said electrical means is activated; and
,whereby, when a user places a leg on said limb support with the sole of his foot flat against said footrest, said exerciser will periodically, through said jointed limb support, move and thereby bend said user'"'"'s leg a predetermined angular distance, said distance being determined by resistance pressure of the leg to bend, so that when said resistance pressure is exceeded, the user'"'"'s foot presses said foot pedal against said override switch, activating said override switch, thereby stopping said motor through said preferential timing means for a timed pause and thereafter putting said motor in reverse to prevent leg injury or damage to the exerciser.
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Accused Products
Abstract
A motor driven leg exerciser, for passive exercising of the knee, with foot and hand operated override controls is disclosed. The exerciser has an adjustable framework, an adjustable leg support, and a movable footrest which includes an override switch, a motor with housing, and controls for user and therapist. In operation, the motor drives a chain driven rod back and forth in an arc to move the leg support. As the rod reaches each end of its arc, it activates a directional switch which in turn stops the motor, causes the device to pause for a predetermined length of time, and reverses the direction of the rod. This series of motor stoppage, pause and reversal of direction are also activated by a pressure operated switch in the footrest, and by a hand held control.
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Citations
14 Claims
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1. In a motorized leg exerciser, said exerciser including an adjustable framework of rods, a movable jointed rectangular limb support operably connected to said rod'"'"'s framework and a motor including a housing to activate periodic movement of said limb support, the improvement comprising:
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(a) a footrest movably attached to said limb support so as to adjust to the user'"'"'s leg length, said footrest including a foot pedal operably connected to an override switch; (b) electrical override means operated by said override switch to stop said motor and reverse the direction of movement of said limb support; (c) electrical means to stop said motor and reverse the direction of movement of said limb support, (d) preferential electrical timing means to cause a pause of a predetermined length each time said override means or said electrical means is activated; and
,whereby, when a user places a leg on said limb support with the sole of his foot flat against said footrest, said exerciser will periodically, through said jointed limb support, move and thereby bend said user'"'"'s leg a predetermined angular distance, said distance being determined by resistance pressure of the leg to bend, so that when said resistance pressure is exceeded, the user'"'"'s foot presses said foot pedal against said override switch, activating said override switch, thereby stopping said motor through said preferential timing means for a timed pause and thereafter putting said motor in reverse to prevent leg injury or damage to the exerciser. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification