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[0001] This invention relates to the field of exercise devices more specifically to devices for using springs or elastomers for resistance and devices providing resistance curves.
[0002] There are resistance curve devices such as U.S. Pat. No. 6,575,881 and there are devices to use springs for resistance such as U.S. Pat. No. 6,328,679 but they are cumbersome and difficult to transport. U.S. Pat. No. 6,575,881 uses weight members for resistance so it is heavy. U.S. Pat. No. 6,328,679 is also limited to being mounted on a wall.
[0003] Present invention allows for the pound per inch requirements associated with stretching a spring or elastomer to be converted to a different pound per inch to stretch spring or elastomer for the purpose that the different pound per inch can be more beneficial than the original pound per inch to stretch elastomer spring.
[0004] Present invention allows for a very lightweight compact device to make resistance for exercise. It also provides different resistance curves which can be used on different muscles. For example when doing the common exercise of a pulldown a person is strongest at the beginning when arms are extended up at the top and as you pull down it gets harder and harder. In this example a person could set the resistance curve to start with heavy pound per inch and drop to lighter pound per inch as person move through the range of motion. Where it is harder to pull. Another example is when someone does a bench press. In this exercise a person is still strongest when arms are extended, however the range of motion for this exercise begins after a person has lowered the bar down to their chest; where they are not as strong as when arms extended. For this exercise a person could set the resistance curve to be lighter pound per inch when bar is close to chest and pound per inch get harder as bar gets pushed up. Another example is if a person wants to have the same; or close to same; pound per inch through a motion to exercise a muscle they can set that resistance curve with present invention.
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[0015] Present Invention includes a Frame
[0016] Present Invention includes a Elastomer Spring
[0017] The pound per inch to stretch Elastomer Spring
[0018] Present invention includes a Lever
[0019] Present invention includes a Pulley Sprocket
[0020] The Pulley Sprocket Position
[0021] The Frame