| 主权项 |
1. An elliptical exercise device comprising:
a frame configured to be supported on a horizontal surface, the frame having a first pivot axis and a second pivot axis defined thereon, the frame further having a forward portion forward of the first pivot axis and a rearward portion rearward of the first pivot axis, the second pivot axis being on the forward portion of the frame; a first and a second vertical control track each having a track surface, each vertical control track having a forward end pivotally connected to the second pivot axis of the frame and a coupling point defined rearward of the second pivot axis; a first and a second guide link each having a first and a second attachment point defined thereon, each guide link being pivotally attached, through its first attachment point, to the frame at the first pivot axis thereof; a first and a second foot support link each having a foot receiving area configured to support a user's foot thereupon, each foot support link being pivotally connected to the second attachment point of a respective one of the guide links so that when the guide links pivot relative to the frame, they each cause the respective foot receiving area to move in a path of travel having a horizontal component of motion; each foot support link engaging the track surface of a respective one of the vertical control tracks and being vertically supported thereby; a vertical drive coupled to the forward portion of the frame; and a first and a second vertical control element each having an upper end coupled to the vertical drive and a lower end coupled to the coupling point of the respective vertical control track such that the vertical drive causes the vertical control tracks to pivot with respect to the frame and the foot receiving area of the respective foot support link to move in a path having a vertical component of motion; wherein the pivotal motion of the guide links about the first attachment points is decoupled from the motion of the foot receiving areas along the path of travel having a vertical component of motion so that the user can achieve a foot path that is generally vertical or generally horizontal or a blend of vertical and horizontal motion. |
