Exercise devices – User manipulated force resisting apparatus – component... – Utilizing weight resistance
Reexamination Certificate
1999-08-03
2001-06-12
Mulcahy, John (Department: 3764)
Exercise devices
User manipulated force resisting apparatus, component...
Utilizing weight resistance
C482S137000, C482S139000
Reexamination Certificate
active
06244996
ABSTRACT:
FIELD AND OBJECTS OF THE PRESENT INVENTION
The present invention relates to leg extension exercise machines wherein the exerciser is typically seated and moves the legs between a retracted position adjacent the seat of the machine and an extended position displaced over 90° (degrees) from the retracted position.
A primary object of the present invention is to provide a novel and improved leg extension exercise machine of the type described.
A further object of the present invention is to provide a novel and improved leg extension machine employing free weights in providing a resistance to extension of the legs during the exercise.
Another object of the present invention is to provide a novel and improved leg extension exercise machine which prevents plantar flexion of the feet during the exercise thereby lending itself for use in rehabilitating the knee after surgery.
A further object of the present invention is to provide a novel and improved leg extension exercise machine which facilitates handling of resistance weight plates between storage and use position on the machine.
SUMMARY OF PREFERRED EMBODIMENT OF THE PRESENT INVENTION
In summary a preferred embodiment of the present invention includes a frame including a seat and back rest assembly for supporting the exerciser while allowing the exerciser to extend the legs from a retracted position adjacent to the seat to an extended position displaced from the seat at least 90° (degrees) and preferably 135° (degrees). Pivotally mounted to the frame is a movement arm including two leg pads engagable by the shins to move the movement arm between retracted and extended positions. In the preferred embodiment the leg pads have an elongated concave recess for accommodating the shins of the exerciser. In addition an adjustable foot bar is provided below the pads for receiving the feet of the exerciser to prevent downward movement or plantar flexion of the feet during the exercise. A resistance weight arm is pivotally mounted to the frame and connected to the movement arm by a linkage for providing resistance to movement of the movement arm to the extended position. One or more weight plates are mounted on the weight arm from a storage area including a rack fixed to the frame with the heaviest weight plates located at the waist-chest area of the exerciser to facilitate handling of the weights. In order to facilitate entry to or exit from the machine, a prop arm is mounted to the frame for movement between a use position where it engages and holds the weight arm in raised position and a storage position spaced from the weight arm.
REFERENCES:
patent: 4822038 (1989-04-01), Maac
patent: 4838548 (1989-06-01), Marc
patent: 5263914 (1993-11-01), Simonson et al.
patent: 5338274 (1994-08-01), Jones
patent: 5462507 (1995-10-01), Nichols et al.
patent: 5669865 (1997-09-01), Gordon
patent: 6074328 (2000-06-01), Johnson
MED-X 96, Inc.
Mouzavires William E.
Mulcahy John
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