Abstract: A compound bow includes a first and second pulley, each of which is operative, when the bow is drawn, to unwind a portion of a bow string from a bow string groove and to take up a portion of a bow cable so as to decrease its effective length. At least one of the pulleys includes a cable controller which operates to modify the rate at which the effective length of the bow cable is decreasing so that during an initial portion of the draw of the bow, the rate is greater than it would be in the absence of the controller, and during a second portion of the draw, the rate is less than it would be in the absence of the controller. Use of the controller provides a bow which has an inherently balanced draw.

Abstract: An elliptical exercise device has a frame supporting guide links and foot support links. A cam system has a vertical control cam portion. Vertical control followers are pivotally connected to a vertical follower support. Mechanical vertical control couplings couple the foot support links to the vertical control followers. A foot receiving area of each foot support link moves in a generally elliptical path when the cam portion rotates about the cam axis.

Abstract: An elliptical exercise device has a frame and guide link pivotally attached thereto. A foot support link is pivotally connected to a lower attachment point of each guide link so that when the guide links pivot relative to the frame, foot receiving areas of the foot support links move in a path of travel having a horizontal component of motion. A cam drive has cams supported for rotation about an axis of rotation and pivoting arms each engaging one of the cams such that rotation of the cams causes movement of the pivoting arms. Flexible elements couple the foot support links to the pivoting arms such that rotation of the cams moves the foot receiving areas of the respective foot support links in a path of travel having a vertical component of motion.

Abstract: An elliptical exercise device has a frame and guide link pivotally attached thereto. A foot support link is pivotally connected to a lower attachment point of each guide link so that when the guide links pivot relative to the frame, foot receiving areas of the foot support links move in a path of travel having a horizontal component of motion. A cam drive has cams supported for rotation about an axis of rotation and pivoting arms each engaging one of the cams such that rotation of the cams causes movement of the pivoting arms. Flexible elements couple the foot support links to the pivoting arms such that rotation of the cams moves the foot receiving areas of the respective foot support links in a path of travel having a vertical component of motion. A crank and horizontal control links control pivoting of the guide links.

Abstract: An elliptical exercise device includes a frame supporting guide links which provide for a horizontal component of motion of associated foot support links A mechanical coupling couples the foot support links to a crank system and intermediate links couple the crank system to the guide links such that a foot receiving area of each foot support link moves in a closed generally elliptical path when the crank system rotates.

Abstract: An elliptical exercise device has guide links pivotally attached to a frame and foot support links pivotally attached to the guide links. Horizontal control links couple the guide links to a crank system and vertical control links couple the foot support links to the crank system such that rotation of the crank system moves foot receiving areas in a generally elliptical path.

Abstract: An elliptical exercise device has guide links pivotally attached to a frame and foot support links pivotally attached to the guide links. Horizontal control links couple the guide links to a crank system and vertical control links couple the foot support links to the crank system such that rotation of the crank system moves foot receiving areas in a generally elliptical path.

Abstract: An exercise device has a frame supporting guide links and foot support links. Upper pulleys are pivotally connected to the frame or guide links, front lower pulleys are connected to the guide links or foot support links and rear lower pulleys are connected to the foot support links. A flexible element extends from a vertical drive assembly to the upper pulley, front lower pulley, rear lower pulley and then to the frame rearward of the guide link pivot.

Abstract: An elliptical exercise device has guide links pivotally attached to a frame and foot support links pivotally attached to the guide links. Horizontal control links couple the guide links to a crank system and vertical control links couple the foot support links to the crank system such that rotation of the crank system moves foot receiving areas in a generally elliptical path.

Abstract: An elliptical exercise device has a frame supporting guide links and foot support links. A cam system has a horizontal control cam portion with a first and second offset horizontal drive portion. Horizontal control followers are pivotally connected to a horizontal follower support and each has a control portion and a cam engagement portion engaging a horizontal drive portion. Horizontal control couplings couple the guide links to the control portions of the horizontal control followers. A vertical drive system is coupled to the foot support links. A foot receiving area of each foot support link moves in a generally elliptical path when the cam portion rotates about the cam axis.

Abstract: An elliptical exercise device includes a frame supporting guide links which provide for a horizontal component of motion of associated foot support links. A mechanical coupling couples the foot support links to a crank system and intermediate links couple the crank system to the guide links such that a foot receiving area of each foot support link moves in a closed generally elliptical path when the crank system rotates.

Abstract: An exercise device has a frame supporting guide links and foot support links. A cam system has a vertical control cam portion with a first and second offset vertical drive portion. Vertical control followers are pivotally connected to a vertical follower support and each has a control portion and a cam engagement portion engaging a vertical drive portion. Vertical control couplings couple the foot support links to the control portions of the vertical control followers. Pivotal motion of the guide links is decoupled from 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 a blend of vertical and horizontal motion.

Abstract: A compound bow includes a first and second pulley, each of which is operative, when the bow is drawn, to unwind a portion of a bow string from a bow string groove and to take up a portion of a bow cable so as to decrease its effective length. At least one of the pulleys includes a cable controller which operates to modify the rate at which the effective length of the bow cable is decreasing so that during an initial portion of the draw of the bow, the rate is greater than it would be in the absence of the controller, and during a second portion of the draw, the rate is less than it would be in the absence of the controller. Use of the controller provides a bow which has an inherently balanced draw.

Abstract: An elliptical exercise device includes a frame supporting guide links which provide for a horizontal component of motion of associated foot support links. A mechanical coupling couples the foot support links to a crank system and intermediate links couple the crank system to the guide links such that a foot receiving area of each foot support link moves in a closed generally elliptical path when the crank system rotates.

Abstract: An adaptive exercise device includes a frame which supports swing arms which provide for horizontal motion of associated foot links. A crank system provides for vertical motion of the foot links and is movable relative to the frame. The vertical and horizontal motions of the foot links are mechanically decoupled and may be blended to approximate a desired foot path. The movable crank system causes the foot path to correspond to a natural running action.

Abstract: A compound bow includes a first and second pulley, each of which is operative, when the bow is drawn, to unwind a portion of a bow string from a bow string groove and to take up a portion of a bow cable so as to decrease its effective length. At least one of the pulleys includes a cable controller which operates to modify the rate at which the effective length of the bow cable is decreasing so that during an initial portion of the draw of the bow, the rate is greater than it would be in the absence of the controller, and during a second portion of the draw, the rate is less than it would be in the absence of the controller. Use of the controller provides a bow which has an inherently balanced draw.

Abstract: An elliptical exercise device includes a frame supporting guide links which provide for horizontal motion of associated foot support links. A mechanical coupling couples the foot support links to the crank system and intermediate links connect the crank system to the guide links such that a foot receiving area of each foot support link moves in an elliptical path when the crank system rotates.

Abstract: An elliptical exercise device includes a frame supporting guide links which provide for a horizontal component of motion of associated foot support links. A mechanical coupling couples the foot support links to a crank system and intermediate links couple the crank system to the guide links such that a foot receiving area of each foot support link moves in a closed generally elliptical path when the crank system rotates.

Abstract: An adaptive exercise device includes a frame which supports swing arms which provide for horizontal motion of associated foot links. A crank system provides for vertical motion of the foot links and is movable relative to the frame. The vertical and horizontal motions of the foot links are mechanically decoupled and may be blended to approximate a desired foot path. The movable crank system causes the foot path to correspond to a natural running action.

Abstract: An adaptive exercise device provides for a foot motion in which the vertical component of the path of foot travel is mechanically decoupled from the fore-aft component of the path of foot travel so that a user may selectably control the ratio of these two components during the use of the device. The adaptive exercise device includes foot links which are supported on a track for motion therealong. The links are mechanically interconnected so that when a first link moves in a first direction along the track, the second link moves in an equal and opposite direction. The apparatus further includes a vertical motion control system which raises and lowers portions of each of the foot links along a vertical path of travel independent of their position along the track.