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A safety interlock for an electric exercise treadmill having an electric powered tilt motor for varying the inclination of the exercise surface. The interlock protects the area below the treadmill frame when the treadmill is being used in an inclined position. Perimeter switches around the bottom of

A safety interlock for an electric exercise treadmill having an electric powered tilt motor for varying the inclination of the exercise surface. The interlock protects the area below the treadmill frame when the treadmill is being used in an inclined position. Perimeter switches around the bottom of the frame are actuated by objects or body members moving under the frame to interrupt power to the treadmill and tilt motors. A safety restarting sequence assures the safety of the user.

대표청구항 ▼

In an electric exercise treadmill having a frame structure with longitudinal sides and forward and rear ends supporting an endless belt providing an exercise surface, said frame being supported from a floor surface at its forward and rear ends, an electric drive motor for moving said belt and an ele

In an electric exercise treadmill having a frame structure with longitudinal sides and forward and rear ends supporting an endless belt providing an exercise surface, said frame being supported from a floor surface at its forward and rear ends, an electric drive motor for moving said belt and an electric power tilt mechanism attached to said frame structure for raising the forward end of said exercise surface to change the inclination of said exercise surface from a floor level position to an elevated position, an interlock control system, comprising, in combination: an automatic perimeter protection switch means attached to the bottom of said frame along said longitudinal sides and forward end so that said switch means superposes said floor surface in close proximity thereto, preventing actuation thereof when said exercise surface is parallel to said floor surfaces, and said switch means is exposed for actuation when said exercise surface is in said elevated position; and circuitry interconnecting said perimeter switch means to supply power to said drive motor and said tilt mechanism and for interrupting said power upon the activation of said perimeter switch means by an object moving under said frame when said exercise surface has been elevated by said tilt mechanism.