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Cam actuated folding treadmill

  • US 6,699,159 B2
  • Filed: 05/31/2002
  • Issued: 03/02/2004
  • Est. Priority Date: 10/11/2001
  • Status: Expired due to Fees
First Claim
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1. A treadmill apparatus comprisinga stationary frame having a supporting base and an upright member;

  • a bed assembly with a longitudinal axis and with first and second ends, having a moveable belt looped from said first end to said second end, said bed assembly being pivotally interconnected adjacent to said first end to said stationary frame such that said bed assembly is rotatable about said pivotal interconnection through a rotational range including a first position in which said longitudinal axis of said bed assembly is approximately parallel to said upright member of said stationary frame and a second position in which said longitudinal axis of said bed assembly is approximately parallel to said base of said stationary frame; and

    balancing means operatively connected between said stationary frame and said bed assembly for applying a force between said stationary frame and said bed assembly so as to approximately counteract the gravitational force acting on said bed assembly throughout said rotational range between said first position and said second position and between said second position and said first position, said balancing means including a biasing means for providing torsional force, said biasing means having a longitudinal axis, at least one cam follower with first and second ends, interconnected at said first end to said biasing means and extending generally perpendicular to said longitudinal axis of said biasing means and generally perpendicular to said longitudinal axis of said bed assembly, and at least one cam having a curved edge with a first end and a second end, said second end of said at least one cam follower received against said curved edge of said at least one cam so as to travel along said curved edge of said cam as said bed assembly is rotated, thereby transferring said torsional force provided by said biasing means through said at least one cam follower and said at least one cam between said stationary frame and said bed assembly.

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