Abstract:
A composite bicycle tire rim constructed from layers or plys of a fiber reinforcement, preferably fiber glass, to provide a rim that has a weight that is comparable to an aluminum rim and as is strong as a steel rim. The composite rim is continuous, is formed as a hooked bead type rim to have inwardly pointing side wall hook ends that are for fitting into grooves formed in a tire side walls, mounting the tire thereto. The rim is formed on a circular mandrel by laying up groups of plys thereon, with four (4) plys of fiber glass laid up for each group. In which laying up, a first ply of the four plys is fitted onto the mandrel to where its fiber angle is parallel to the mold mandrel circumference, with a following ply laid thereon at a selected positive angle to a vertical axis, and a next ply is laid thereon at a negative angle to the vertical axis, and with a final ply of each group laid thereon to have its fibers perpendicular to a tangent to the mold circumference. Which fiber placement, for each group, creates a balanced laminate, without residual stress, that is not subject to dimensional deformity. The mandrel with the groups of fiber glass plys thereon, is placed in a mold cavity, wherein the laminate is subjected to heat and pressure to cure it into the composite rim that is removed from the mold and the mandrel cross section is reduced to allow it to be removed from between the rim hook ends. Which hook ends are machined to a desired length from the rim side walls inner surfaces, and the rim is coated with a urethane polymer to enhance the overall rim strength and provide an attractive surface finish.
Abstract:
A method of manufacturing a rim for a bicycle wheel includes wrapping plys of fibers in a resin matrix around a mandrel; curing the plys to form the rim; and reducing a size of the mandrel to allow the mandrel to be removed from the rim.
Abstract:
A method of manufacturing a rim for a bicycle wheel includes wrapping plys of fibers in a resin matrix around a mandrel; curing the plys to form the rim; and reducing a size of the mandrel to allow the mandrel to be removed from the rim.
Abstract:
A wheel hub with clutch where power is transferred through a drive, such as a chain that is linked between a pedal arrangement and a gear or gears splined onto the hub. The hub provides free-wheeling when torque is not applied thereto and will instantly engage, transferring an applied torque therethrough and into a wheel connected to the hub when torque is applied as through a pedal arrangement. For locking, the hub includes, as a radial load bearing component, a sleeve whereon a gear or gears are splined, with the splined gear sleeve mounting a thick ring for fitting into an end of a wheel sleeve. The thick ring contains spaced sloping pockets, each containing a ball bearing. The wheel sleeve includes an annular ring that receives the thick ring fitted there and has spaced steps, or the like, formed therein to engage the ball bearing surfaces, transferring torque.
Abstract:
An implementation of an ISDN router enables computers interconnected to each other and to the ISDN to share resources by issuing operating system commands. One computer can access a storage disk or other resource of another computer distributed at any terminal location on the ISDN. Each disk on the Network has a unique name by which it is accessed. The configuration of the Network and number of computers distributed on it are transparent to each user. To improve bandwidth utilization of the ISDN line while sharing terminal resources, a B-channel allocation algorithm executed by routers between the terminals and the ISDN line dynamically allocates bandwidth by monitoring traffic at each destination queue and in response allocating or deallocating virtual B-channels. Bandwidth utilization is optimized by packaging data packets into trains that are transmitted to the destination when the train is completed and upon satisfaction of other conditions. Each train undergoes data compression by execution of a suitable compression algorithm.
Abstract:
The present invention relates to wind turbines and more particularly to a multi-element airfoil for a vertical or horizontal axis wind turbine. In one embodiment, a vertical wind turbine includes a plurality of blades arranged in an annular path around a central axis of rotation. Each blade includes a first element and a second element that are nestable together. The first element has a concave rear surface, and the second element has a convex leading surface. Each of at least 45% of the blades generates a lift in a direction of rotation of the turbine that is greater than a drag generated by the same blade.
Abstract:
A wheel hub with clutch where power is transferred through a drive, such as a chain that is linked between a peddle arrangement and a gear or gears splined onto the hub. The hub provides free-wheeling when torque is not applied thereto and will instantly engage, transferring an applied torque therethrough and into a wheel connected to the hub when torque is applied as through a peddle arrangement. For locking, the hub includes, as a radial load bearing component, a sleeve whereon a gear or gears are splined, with the splined gear sleeve mounting a thick ring for fitting into an end of a hub body. The thick ring contains spaced sloping slots, each containing a ball bearing. The hub body includes an annular ring that receives the thick ring fitted there and has spaced steps, or the like, formed therein to engage the ball bearing surfaces, transferring torque.
Abstract:
A wheel hub with clutch where power is transferred through a drive, such as a chain that is linked between a peddle arrangement and a gear or gears splined onto the hub. The hub provides free-wheeling when torque is not applied thereto and will instantly engage, transferring an applied torque therethrough and into a wheel connected to the hub when torque is applied as through a peddle arrangement. For locking, the hub includes, as a radial load bearing component, a sleeve whereon a gear or gears are splined, with the splined gear sleeve mounting a thick ring for fitting into an end of a hub body. The thick ring contains spaced sloping slots, each containing a curved member. The hub body includes an annular ring that receives the thick ring fitted there and has spaced steps, or the like, formed therein to engage the curved members and transfer torque.
Abstract:
A wheel rim for a human powered vehicle includes a rim with a braking surface and a wear indicator located beneath the braking surface, such that when the braking surface is worn away, the wear indicator is visually exposed. A method for determining if a predetermined amount of rim wear has occurred in a rim braking human powered vehicle is also provided.
Abstract:
A wheel hub that provides a wheel that is free-wheeling in both directions of turning and is constructed to provide low rolling resistance, greater load carrying capacity and is more reliable that earlier hubs. The hub includes separate bearing systems for supporting, respectively, radial loads as perpendicular to a road surface, and axial loads as are side loads directed into the hub. The separate bearing systems include a pair of radial bearings for supporting radial loads, with each radial bearing of the pair mounted at each hub end to receive an axle fitted therethrough, and a pair of thrust bearings for supporting axial loads, with each thrust bearing of the pair mounted at a hub end, between the radial bearings outer surfaces and an axle mounting to a frame.