File:Variable resistance exercising device.png

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Summary

Description An improved exercising device for exercising the legs of a user includes a frame member with a lever arm having one end pivotably attached thereto. The lever arm extends downwardly from the portion of the frame member to which it is pivotably connected, and a pair of foot-engaging force transferring members are mounted on the lower end of the lever arm. A cable has one end pivotably connected near the lower end of the lever arm, passes around an eccentrically mounted pulley and has its other end connected to weights. As the user lifts the lower portions of his legs, the lever arm is pivoted to pull the cable and the weights attached thereto, thereby strengthening the knee muscles of the user. The eccentrically mounted pulley varies the resistance to movement of the user's lower legs initially increasing the resistance and then decreasing the resistance in a sinusoidal manner as the lower legs are lifted to pivot the lever arm and lift the weights.
Date
Source US patent #4,256,302
Author Inventors: Dennis L. Keiser, Gideon B. Ariel
Permission
(Reusing this file)
This drawing was included in the application for US patent #4,256,302[1] with a priority date of March 10, 1976. It had no copyright notice and is therefore public domain.

Licensing

This work is in the public domain in the United States because it was published in the United States between 1929 and 1977, inclusive, without a copyright notice. For further explanation, see Commons:Hirtle chart as well as a detailed definition of "publication" for public art.

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Original upload log

The original description page was here. All following user names refer to en.wikipedia.
Date/Time Dimensions User Comment
2016-12-01 16:17:45 1255 × 1940 Hroth69 An improved exercising device for exercising the legs of a user includes a frame member with a lever arm having one end pivotably attached thereto. The lever arm extends downwardly from the portion of the frame member to which it is pivotably connected...

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10 March 1976

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current05:13, 26 September 2018Thumbnail for version as of 05:13, 26 September 20181,255 × 1,940 (60 KB)FSockTransferred from en.wikipedia (MTC!) (1.1.1)

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