Exercise devices – Involving user translation or physical simulation thereof – Treadmill for foot travel
Reexamination Certificate
1999-09-16
2002-10-08
Donnelly, Jerome W. (Department: 3764)
Exercise devices
Involving user translation or physical simulation thereof
Treadmill for foot travel
C482S051000
Reexamination Certificate
active
06461278
ABSTRACT:
The invention concerns a treadmill according to the introductory part of claim
1
.
BACKGROUND
As well known, treadmills are used mainly for running and training indoors, for example for measuring the capacity of a runner, or in situations where it is difficult for the runner to train outdoors. Traditional treadmills are constructed on a framework with a belt organ drawn out over a drive roller and a turn roller. Furthermore, the drive roller is connected to a drive means, usually in the shape of an electrical motor, through a driving wheel and belt. The treadmill can also be equipped with regulators in order to adjust the rotation speed of the belt organ, measure the distance run and adjust the height of the forward part of the mill in order to stimulate uphill running. Furthermore, the carrying structure of the framework is separated in the front of the drive roller in order to remove the side cover of the framework and provide access to the belt organ, for maintenance and changing the belt.
A disadvantage in prior art is first that a change of the belt organ is very time consuming and, in many cases, takes up to one day. Besides, the separated carrying construction involves a potential breaking point in the area where the load is greatest, that is, the area taking up weight of the drive unit and weight of the runner, and the construction can thus during a period of time be weakened in the breaking point and collapse.
OBJECT
The object with present invention is to provide an improved treadmill overcoming the disadvantages with prior art stated above.
THE INVENTION
This object is achieved with a treadmill according to the characterizing part of claim
1
. Further advantageous features are provided in the independent claims.
The object of the invention is achieved by the carrying structure of the treadmill—the main frame—is formed as an integrated unit and is formed so that the belt module comprising the belt organ, the turn roller and the running base, in a quick and easy way can be pushed in and out of he main frame, for ease in changing of the belt. Another advantage achieved is that the construction, due to the unity of the main frame, does not represent any potential deflection point, as opposed to previously known devices.
REFERENCES:
patent: 4872664 (1989-10-01), Parker
patent: 5088729 (1992-02-01), Dalebout
patent: 5690587 (1997-11-01), Gruenangerl
patent: 6117053 (2000-09-01), Chiu
Dennison, Schultz & Dougherty
Donnelly Jerome W.
Nguyen Tam
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