Abstract: A system for determining power expended by a bicyclist while riding a bicycle based on speed measurements or sensed-speed values. The system includes a sensing device arranged for detecting a speed-related value of the bicycle and a processor that communicates with the sensing device. The processor is configured to determine a change in the speed-related value and to determine a power value based on the change in the speed-related value.

Abstract: A self-adjusting bolt action skewer clamp for a bicycle trainer includes a hollow, outer support member and an inner engagement member located inside the support member. The support member has a helical slot with a pocket at one end. The inner engagement member is attached to a handle via a carrier contained within a passage defined by the inner engagement member, and the handle can slide within the helical slot such that the inner engagement member will extend past the support member as the handle is rotated around the helical slot. Once it reaches the pocket, the handle will remain locked in place. The clamp tightens onto a rear axle of the bicycle. The spring allows the bicycle trainer to accommodate bicycles of various sizes without adjustment.

Abstract: A bicycle trainer includes a reverse resistance unit mounting arrangement that is configured to increase traction between a bicycle wheel and a resistance unit upon an increase in the speed of rotation of the wheel. The reverse resistance unit mounting arrangement is configured to mount the resistance unit in a suspension-type manner and has an actuator that initially positions the resistance unit against the bicycle wheel. The reverse resistance unit mounting arrangement tends to pivot the resistance unit against the bicycle wheel during use, to automatically bias the wheel toward the resistance unit to prevent slippage between the bicycle tire and the roller of the resistance unit.

Abstract: A bicycle power sensing system includes an electronics module that can be separated from a power-measuring hub assembly. The power-measuring hub assembly includes onboard electronics that cooperates with the electronics module when the electronics module is attached to the power-measuring hub assembly. The onboard electronics includes a memory module that stores a calibration value for a torque tube of the power-measuring hub assembly so that the torque tube does not have to be recalibrated after the electronics module is removed from the power-measuring hub assembly.

Abstract: A controlled pressure resistance unit engagement system for bicycle training devices uses a clutch arrangement to limit the maximum torque applied. By doing so, a consistent, correct pressure on a bicycle tire by the resistance unit is achieved, thereby avoiding damage to the resistance unit and the bicycle tire and allowing a more consistent resistance unit power curve to be achieved.

Abstract: A power sensing arrangement for the rear hub of a bicycle. The power sensing arrangement includes a torque sensing assembly including torque sensing elements configured to measure a user applied torque. The torque sensing elements are in communication with an electronics assembly configured to process the measured data and transmit it to a receiver. The torque sensing elements are interconnected with the free hub assembly of the rear hub, and are operable to detect torque applied to the free hub from the rear cassette.

Abstract: A cassette-based power measuring apparatus includes a power sensing arrangement mounted within a cavity defined by a hollow bicycle cassette. The power sensing arrangement includes a torque sensing assembly including torque sensing elements configured to measure a user applied torque. The torque sensing elements are in communication with an electronics assembly configured to process the measured data and transmit it to a receiver. The torque sensing assembly may comprise a torque tube or a series of bending beams secured between a rear plate of the cassette and a freehub. The torque tube or bending beams may include strain gauges bonded thereto for measuring strain induced by application of forces in response to user-applied power.

Abstract: A dual actuation mechanism for controlling resistance applied to a rotating member includes a lever, a first actuator and a second actuator. The first actuator and second actuator are both operably coupled to the lever, wherein the first actuator and the second actuator move the lever independent of the other. For example, the lever may have a first slot for receiving the first actuator and a second slot for receiving the second actuator, wherein the first slot and second slot are sized such that when one actuator moves the lever, the other actuator is undisturbed because the respective slot moves with respect to the non-moving actuator. The dual actuation mechanism may be incorporated in an exercise cycle in which one of the actuators controls a level of resistance applied to a flywheel, and the other of the actuators selectively applies a stopping force to the flywheel.

Abstract: A torque sensing arrangement has a set of strain sensors, such as strain gauges, mounted to an adapter that can be mounted to a chain ring of the crank set of a bicycle wheel. The adapter may have an annular body that can be used to retrofit the original crank set of a bicycle to have torque sensing components without having to replace the chain rings or the crank arm of the crank set. Together with angular velocity measurements, the measurements of the strain sensors may be used to calculate the amount of work or power exerted by the cyclist to propel the bicycle.

Abstract: A bicycle parking system includes a frame having a number of lower supports and a number of upper supports, each support being constructed to receive a bicycle. The frame includes a slide bar operatively engaged with each of the upper supports. Each slide bar includes a curved end to allow the attached upper support to rotate relative to the slide bar for loading and unloading of the upper support. A spring assembly biases each upper support toward a stored position.

Abstract: A cassette-based power measuring apparatus includes a power sensing arrangement mounted within a cavity defined by a hollow bicycle cassette. The power sensing arrangement includes a torque sensing assembly including torque sensing elements configured to measure a user applied torque. The torque sensing elements are in communication with an electronics assembly configured to process the measured data and transmit it to a receiver. The torque sensing assembly may comprise a torque tube or a series of bending beams secured between a rear plate of the cassette and a freehub. The torque tube or bending beams may include strain gauges bonded thereto for measuring strain induced by application of forces in response to user-applied power.

Abstract: A bicycle trainer includes a frame, a resistance unit interconnected with the frame, and a wheel mounting arrangement for securing the bicycle wheel to the frame. The wheel mounting arrangement includes first and second spaced apart wheel engagement areas, one of which includes a threaded wheel engagement member. A fixed-position threaded actuator member is rotatably interconnected with the frame. Rotation of the actuator member causes extension and retraction of the wheel engagement member, to move the wheel engagement member toward and away from the second wheel engagement area, and to selectively clamp the wheel between the second wheel engagement area and the wheel engagement member. The threads of the actuator member and the wheel engagement member are lead threads, and a guide arrangement is associated with the threaded wheel engagement member for guiding inward and outward movement of the wheel engagement member upon rotation of the actuator member.

Abstract: A bicycle trainer includes a frame and a resistance unit movably interconnected with the frame by an adjustment arrangement for movement through a range of operative positions and to an inoperative position. The adjustment arrangement includes an adjustment member that is selectively engaged with, and disengaged from, an engagement member. When disengaged, the adjustment member slides relative to the engagement member. The sliding movement of the adjustment member provides a first mode of operation to move the resistance unit to an initial engagement position adjacent the wheel, and the adjustment arrangement can be operated in a second mode of operation, such as by cam-type movement, to advance the resistance unit from the initial engagement position toward and against the wheel.

Abstract: An exercise system includes a user input arrangement; a rotatable member that rotates in response to an input force applied by a user on the user input arrangement; a power sensing arrangement that senses power applied to the rotatable member due to the input force applied by the user; and a variable resistance arrangement interconnected with the power sensing arrangement and with the user input arrangement. The resistance arrangement applies resistance to rotation of the rotatable member, and is variable in response to the power sensing arrangement to vary the resistance applied to the rotatable member. The variable resistance arrangement may be a brake that interacts with the rotatable member to resist rotation of the rotatable member, and to thereby resist the input force applied by the user. The variable resistance arrangement includes a controller for controlling the brake in response to the power sensing arrangement.