Exercise treadmill

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Patent

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Details

198846, A63B 2306

Patent

active

046027793

ABSTRACT:
A treadmill exercising apparatus comprising a generally planar frame equipped with an inclinable, planar slider bed, a driving head roller, and an idler tail roller, both journalled in the slider bed and respectively at the head and tail ends of the frame, over which an endless belt, formed by a low long term creep or stretch resistant synthetic resin extruded film, oriented of polyester or nylon, is trained, with the slider bed having a top slider surfacing formed from one of the same materials or from Masonite hardboard sheeting, across which the upper run of the belt rides, with the head and tail rollers each being formed from a rigid metallic material and provided with a belt centering crown, which, at least in the case of the driving head roller, is provided with an elastomeric coating or covering that defines the crown surfacing, whereby the coefficient of dynamic friction of the belt riding on the treadmill slider bed is no more than about 0.22, while the coefficient of static friction between the crown surfacing of the treadmill driving roller and the belt is no less than about 0.4, with the belt also being adjustably tension against the rollers to be in slip free tight relation thereto under a tension that is a nominal fraction of the tensile strength of the belt, thereby providing maximized driving efficiency with minimum energy requirements that permit the use of an electric drive motor for walking exercise use of the treadmill that may be less than one horsepower.

REFERENCES:
patent: D211801 (1968-07-01), Quinton
patent: D270555 (1983-09-01), Ogden
patent: 759296 (1904-05-01), Moriarty
patent: 3637206 (1972-01-01), Chickering, III
patent: 3643943 (1972-02-01), Erwin et al.
patent: 3659845 (1972-05-01), Quinton
patent: 3703284 (1972-11-01), Hesen
patent: 4227487 (1980-10-01), Davis
patent: 4344616 (1982-08-01), Ogden
patent: 4364556 (1982-12-01), Otte
patent: 4374587 (1983-02-01), Ogden

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