Abstract: An intersection management system and method for reducing or avoiding potential collisions between vehicles are provided. The system may use a wireless signal, with or without a circuit, to traverse an intersection. The system may use, at least in part, a positive vehicle control system.

Abstract: A treadmill including a frame, a suspension connector, a flexible deck, and a belt. The suspension connector is connected to the frame. The flexible deck is connected to the suspension connector. The flexible deck includes a metal panel extending substantially an entire width and length of the flexible deck. The belt is disposed on the flexible deck.

Abstract: A treadmill including a frame, a suspension connector connected to the frame, and a flexible deck connected to the suspension connector. The flexible deck is configured to flex in response to a load applied by a user striding on the treadmill. The suspension connector includes a suspension pivot that allows rotation of the flexible deck around the suspension pivot.

Abstract: A stationary exercise cycle. The stationary exercise cycle includes a frame, a crank rotatably connected to the frame, a driven wheel rotatably connected to the frame, and a frame stiffener. The frame includes a down tube and a fork. The crank and the driven wheel are in operative communication via a continuous flexible member. The frame stiffener is connected to the down tube and the fork and encircled by the continuous flexible member.

Abstract: A treadmill including a frame, a suspension connector connected to the frame, and a flexible deck connected to the suspension connector. The flexible deck is configured to flex in response to a load applied by a user striding on the treadmill. The suspension connector includes a suspension pivot that allows rotation of the flexible deck around the suspension pivot.

Abstract: A crank-driven exercise device (100). The crank-driven exercise device (100) includes a frame (102), a spindle (202) rotatably connected to the frame (102), a crank arm (104) connected to the spindle (202), and a user input (208) connected to the crank arm (104) configured to receive a force from a user. In some embodiments, the crank arm (104) includes a proximal section (204) and a distal section (206). The proximal section (204) may be connected to the spindle (202) at a spindle interface (302), the distal section (206) may be rotatably connected to the user input (208) at a user input interface (306), and the distal section (206) may be selectively fastenable and selectively rotatable relative to the proximal section (204) at a crank interface (304).

Abstract: A stationary exercise cycle. The stationary exercise cycle includes a frame, a crank rotatably connected to the frame, a driven wheel rotatably connected to the frame, and a frame stiffener. The frame includes a down tube and a fork. The crank and the driven wheel are in operative communication via a continuous flexible member. The frame stiffener is connected to the down tube and the fork and encircled by the continuous flexible member.

Abstract: A cycle with tapered drivetrain connections. The cycle includes a frame, a crank rotatably connected to the frame, and a driven wheel rotatably connected to the frame. The crank includes a crank arm and a crank spindle rotatably connected to the frame and non-rotatably connected to the crank arm. The crank spindle includes a crank mating surface to interface with the crank arm. The diameter of the crank spindle continuously decreases along at least a portion of the crank mating surface in a lateral direction. The crank arm includes a crank bore to interface with the crank mating surface. At least a portion of the crank bore has a diameter that continuously decreases in lateral direction. At least a portion of the crank bore taper has a taper rate and diameter equal to a taper rate and diameter of at least a portion of the crank spindle taper.

Abstract: A dual treadle treadmill. The dual treadle treadmill includes a frame, a first treadle, a second treadle, and a generator. The first treadle and the second treadle are each pivotally coupled with the frame and each have a moving surface. The generator is operably associated with the first treadle such that the generator is driven in response to the first treadle pivoting relative to the frame. Other embodiments of dual treadle treadmills are also described.

Abstract: A crank-driven exercise device (100). The crank-driven exercise device (100) includes a frame (102), a spindle (202) rotatably connected to the frame (102), a crank arm (104) connected to the spindle (202), and a user input (208) connected to the crank arm (104) configured to receive a force from a user. In some embodiments, the crank arm (104) includes a proximal section (204) and a distal section (206). The proximal section (204) may be connected to the spindle (202) at a spindle interface (302), the distal section (206) may be rotatably connected to the user input (208) at a user input interface (306), and the distal section (206) may be selectively fastenable and selectively rotatable relative to the proximal section (204) at a crank interface (304).

Abstract: An exercise apparatus with a generator. The exercise apparatus includes a frame, a rotating component, a generator, and a battery. The rotating component is rotatably connected to the frame and the rotating component rotates in response to operation of the exercise apparatus. The generator is connected to the rotating component and the frame. The generator includes a rotor connected to the rotating component and a stator. The rotor rotates in response to rotation of the rotating component. The stator is connected to the frame. The stator interacts with the rotor to produce electric current at an output. In one embodiment, the battery is connected to the output wherein the battery is charged by electric current from the generator.

Abstract: A dual treadle treadmill. The dual treadle treadmill includes a frame, a first treadle, a second treadle, and a generator. The first treadle and the second treadle are each pivotally coupled with the frame and each have a moving surface. The generator is operably associated with the first treadle such that the generator is driven in response to the first treadle pivoting relative to the frame. Other embodiments of dual treadle treadmills are also described.

Abstract: A dual treadle treadmill. The dual treadle treadmill includes a frame, a first treadle, a second treadle, a clutch axle, and a tensioning mechanism. The first treadle and the second treadle are each pivotally coupled with the frame and each have a moving surface. The clutch axle includes an axle, a first driver, and a second driver. The axle is rotatably connected to the frame. The first driver is coupled to the axle by a first clutch. The first clutch transmits torque between the first driver and the axle in response to the first driver rotating in a first direction relative to the axle. The first treadle is connected to the first driver through a first link such that the first driver is rotated in a first direction in response to the first treadle being pivoted in the first direction. The tensioning mechanism maintains a tension on the first link.

Abstract: An exercise apparatus with a generator. The exercise apparatus includes a frame, a rotating component, a generator, and a battery. The rotating component is rotatably connected to the frame and the rotating component rotates in response to operation of the exercise apparatus. The generator is connected to the rotating component and the frame. The generator includes a rotor connected to the rotating component and a stator. The rotor rotates in response to rotation of the rotating component. The stator is connected to the frame. The stator interacts with the rotor to produce electric current at an output. In one embodiment, the battery is connected to the output wherein the battery is charged by electric current from the generator.

Abstract: A cycle with tapered drivetrain connections. The cycle includes a frame, a crank rotatably connected to the frame, and a driven wheel rotatably connected to the frame. The crank includes a crank arm and a crank spindle rotatably connected to the frame and non-rotatably connected to the crank arm. The crank spindle includes a crank mating surface to interface with the crank arm. The diameter of the crank spindle continuously decreases along at least a portion of the crank mating surface in a lateral direction. The crank arm includes a crank bore to interface with the crank mating surface. At least a portion of the crank bore has a diameter that continuously decreases in lateral direction. At least a portion of the crank bore taper has a taper rate and diameter equal to a taper rate and diameter of at least a portion of the crank spindle taper.

Abstract: An elliptical exercise machine features a pair of translating members to which a pair of foot members is axially secured. The foot members each pivots with respect to the associated translating member. The generated motion allows a user to lock a knee before beginning downward movement and allows a user to bend the same knee before beginning forward movement such that the motion is more natural for the user.

Abstract: An exercise machine including a weight measurement system which provides a signal representative of a user's weight. An embodiment of the weight measurement system includes at least one load cell outputting a signal used by a microprocessor to determine an accurate value of the users weight. An embodiment of the weight measurement system includes a plurality of load cells using a Wheatstone bridge configuration to output a signal representative of a user's weight regardless of whether the weight is evenly distributed across each load cell. A calibration process calibrates the load cells for each exercise machine.

Abstract: An exercise machine has a frame and an operating linkage. The operating linkage includes any of a number of mechanisms that can adjust a foot trace generated by the linkage. In one configuration, the foot trace can be adjusted between at least a generally vertical trace and a generally horizontal trace.