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Combination of treadmill and stair climbing machine

  • US 7,097,593 B2
  • Filed: 08/11/2003
  • Issued: 08/29/2006
  • Est. Priority Date: 08/11/2003
  • Status: Expired due to Term
First Claim
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1. A combination of treadmill and stair climbing machine, comprising:

  • a frame with two posts extending from two sides of a front end of the frame and a handle connected between the two posts, two lugs connected on the two sides of a rear end of the frame and a roller connected between the two lugs, a wheel connected to the roller and driven by a motor;

    two pedals each having a connection plate on a side thereof and the two connection plates connected to the lugs, two hydraulic cylinders respectively connected between the two posts and the two pedals, each pedal including a running belt which reeves through the roller and a front end of each pedal;

    a switch member pivotably connected to a U-shaped frame connected to the front end of the frame and the switch member being positioned at a horizontal position when the two pedals are used as a stair climbing machine, and an inclined position when the two pedals are used as a treadmill, a first spring connected between an underside of the switch member and the frame;

    a swing mechanism pivotably connected to the frame and the two pedals; and

    wherein a sub-frame is connected to a side of one of two side plates of the U-shaped frame and a handle having a cam head which is pivotably connected to a pin which extends through the sub-frame and a first hole defined through the side plate, a second spring mounted to the pin and biased between the side plate of the U-shaped frame and the sub-frame, the switch member having an extension which has a second hole defined therethrough, the pin being inserted in the second hole when the switch member is set in the inclined position.

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