Patent Application
20110109150
The sized spoke weight generally relates to motorcycle accessories and more specifically to balancing wheels with weights fitted to the spokes of a wheel.
After purchase, an owner often takes a motorcycle on rides on a road or off the road. For both surface conditions, motorcycle owners generally seek a smooth ride. A smooth ride begins with the surface and then the motorcycle accommodates surface imperfections, bumps, and curves through the tires, wheels, and suspension system. The wheels and suspension system isolate and dampen the wheel and chassis impacts perceived by the owner as not a smooth ride.
The tires engage the road or other surface. Solid tires transmit surface impact forces directly through the tires into the wheel. Pneumatic tires flex and bend with impact forces and transmit less force to the wheel. Over time, tires wear with use yet the suspension system accommodates wearing of a tire as the suspension system adjusts. The suspension system, being mechanical with some dampening by compressible fluids such as air or selected liquids, attenuates or smoothes the impact forces sent into the suspension system. The suspension system adjusts and meets the impact forces within design limits of the system. Barring mechanical failure, the suspension system operates throughout its design range with little adverse affect on the owner.
Turning intermediate the tires and the suspension system of a motorcycle, the wheels provide a mechanical link from the tires to the suspension system and chassis of a motorcycle. Each wheel, generally metallic or high strength composite fiber, has a rim that receives and secures a tire thereon. Unless the wheel has a solid construction, the hub locates spaced away from the rim upon at least three spokes. A spoke extends from the hub to the rim, supports the weight of the motorcycle, owner, and cargo, and endures the forces from the surface while the motorcycle rides along. Through three spokes can support a hub, generally wheels have a plurality of spokes. As the number of spokes rises, the size of each spoke can decreases. As a wheel turns, the spokes turn with the wheel and transmit forces to the hub and on into the suspension system.
Upon manufacturing and later after certain impacts, a wheel has or acquires select tiny imperfections in its weight or geometry. These imperfections cause a wheel to rotate about an axis not perpendicular to the path of travel of the wheel, about an axis not perpendicular to the longitudinal centerline of a motorcycle, or both. In brief, the wheel wobbles. For minor wobbles, the spokes flex and dampen the wobble, unnoticed by the owner. For noticeable wobbles, the spokes transmits wobbles and the owner notices them. Noticeable wobbles also wear tires unevenly and cause the owner to adjust their steering position so the motorcycle travels straight though the handlebars become askew. Wobbles though can be mitigated through balancing of a wheel.
In bays and shops around the world, numerous tires are changed from wheels every day and wheels return to shops for inspection. During a tire change, a worn or damaged tire is removed from a wheel and a new tire is installed. During an inspection, a mechanic checks a wheel for abnormalities along with the complaints of an owner. Following a tire change or upon an adverse inspection, a wheel is balanced by spinning it upon its axis through the center. By a balancing machine or visual or auditory means, a mechanic determines where the wheel is out of balance and so marks the tire or the wheel with chalk or other marker. The mechanic then places lead weights upon the wheel at the marks, hammers the weights in place upon the rim, and spins the weighted wheel to check for balance shown by the absence of vibration. The positioning, marking, weighting and checking are repeated until the wheel balances.
Some bays and shops use manual equipment for balancing of wheels, particularly static balancing. Manual balancing involves a stand that supports a rod upon which a wheel turns. The vertical stand maintains the rod generally horizontal so a wheel rotates within a vertical plane. In the vertical plane, the wheel balancing occupies a minimum of floor space, useful to small and crowded shops. As the wheel turns, a mechanic notes, with chalk or other marker, points on the wheel that are out of balance. The mechanic then attaches weights upon the marked places of a rim. The mechanic then spins the wheel to check its balance, when the wheel stops at any point of rotation, it has achieved a static balance. If necessary, the weighting and checking is repeated until the wheel achieves a balanced state.
Wheels are used on many vehicles. On utility vehicles, the appearance of wheels matters less so than on personal vehicles. For automobiles, motorcycles, and some boat trailers, the wheels and their appearance have high importance to their drivers. People often place great emphasis on the appearance of wheels as part of their self image. The after market in wheels of all kinds is huge. Often, people seek out shiny, or novelty, wheels to customize vehicles. In particular, motorcycles have shiny wheels including spokes and rims. The shine upon the wheels arises from chrome a metal alloy, or metal plating, upon the wheel, particularly the rim. Alloys and plating are readily damaged by harder materials usually contained in shop tools and equipment that shop tools and equipment are known to mar wheels. The owners of shiny wheels have little tolerance for shop caused blemishes upon their wheels.
Traditionally, wheels, even shiny wheels, have been clamped for tire balancing and other procedures. Metal clamps grip the hub of a wheel snugly upon an axle that is then rotated to find the light point of a wheel. Across the diameter from the light point is the theoretical heavy point of a wheel. A properly sized lead weight placed and hammer at the light point offsets the heavy point so the wheel becomes balanced. The lead weights abrade the wheels over time, react with the metals of the wheel leading to discoloration, and in time may fall off the wheel. For some wheels, lead weights are applied using tape over the weight or as a weighted tape adhered to the surface of the rim. In time, the tape fails and the weight falls off the wheel leaving a difficult to remove tape residue. Lead weights can become an environmental hazard as they degrade on the side of a road or enter a waterway.
Unlike wheel weights wedged upon the rim, spoke weights also balance a wheel. The spoke weights prove useful to wheels with many spokes thus allowing for a spoke to be located at a balance point of a wheel. The spoke weights have various sizes and secure to a spoke. Existing weights secure to a spoke by crimping using a pair of pliers or special compressive tool. A spoke also has a nipple connecting it to the rim of a wheel. The nipple is generally located upon a spoke opposite its connection to a hub. The nipple reinforces the spoke proximate a zone of maximum shear at the rim. The nipple is generally wider, or of greater diameter, than the spoke and has a short length inwardly from the rim. Existing spoke weights have a central opening that admits a spoke but does not fit upon a nipple. A central opening sized for a nipple would be bigger than the spoke width leading to the spoke weight falling from the spoke when a wheel ceases rotation.
The present invention overcomes the difficulties of marring a wheel by weights adjoining a rim, locating spoke weights inwardly from a nipple and the rim, and leaving a tape residue upon a wheel. The present invention uses materials less toxic to the environment and allows for reuse of spoke weights.
Generally, the sized spoke weight has a partially cylindrical body with a longitudinal slot, and a first end and an opposite second end. The first end locates towards the hub of a wheel when installed and the second end locates towards the nipple of a spoke, that is, towards the rim of a wheel. The slot extends from the first end to the second end and allows the sized spoke weight to fit over an existing spoke. Proximate the second end, the slot has a greater diameter to accommodate an existing nipple during installation. The sized spoke weight is generally brass and has various sizes with corresponding weights for wheel balancing.
There has thus been outlined, rather broadly, the more important features of the invention in order that the detailed description thereof that follows may be better understood and that the present contribution to the art may be better appreciated. The present invention also includes a set screw proximate the second end, a frusto-conical shape to the first end, and a bevel upon the end of the slot proximate the second end. Additional features of the invention will be described hereinafter and which will form the subject matter of the claims attached.
Numerous objects, features and advantages of the present invention will be readily apparent to those of ordinary skill in the art upon a reading of the following detailed description of the presently preferred, but nonetheless illustrative, embodiment of the present invention when taken in conjunction with the accompanying drawings. Before explaining the current embodiment of the invention in detail, it is to be understood that the invention is not limited in its application to the details of construction and to the arrangements of the components set forth in the following description or illustrated in the drawings. The invention is capable of other embodiments and of being practiced and carried out in various ways. Also, the phraseology and terminology employed herein are for the purpose of description and should not be regarded as limiting.
One object of the present invention is to provide a size spoke weight that fits over existing spokes and secures to existing nipples.
Another object is to provide such a size spoke weight that does not use adhesives or tapes.
Another object is to provide such a size spoke weight that resists degradation by the environment and does not contribute to environmental pollution.
Another object is to provide such a size spoke weight that has a low cost of manufacturing so the purchasing consumers and organizations can readily buy the size spoke weight through stores and supply sources.
These together with other objects of the invention, along with the various features of novelty that characterize the invention, are pointed out with is particularity in the claims annexed to and forming a part of this disclosure. For a better understanding of the invention, its operating advantages and the specific objects attained by its uses, reference should be had to the accompanying drawings and descriptive matter in which there is illustrated a preferred embodiment of the invention.
In referring to the drawings,
The same reference numerals refer to the same parts throughout the various figures.
The present art overcomes the prior art limitations by providing a sized spoke weight that fits upon a spoke nipple and secures itself upon the nipple without adhesive.
Next right from the alternate embodiment, this figure shows the preferred embodiment of the weight as at 6. This embodiment of the weight also has a generally cylindrical shape with a first end 2 locating inwardly. Here the weight widens in a frusto conical manner outwardly from the first end towards the rim as at 7. The first end has a lesser diameter than the remainder of the weight. Approximately midway along the depth of the weight, the weight widens to its maximum diameter outwardly from the frusto-conical portion. The weight has a setscrew 5 that extends through a threaded aperture in the outer surface 4 to abut the nipple. The set screw advances radially through the outer surface. Turning of the setscrew secures the weight to the nipple. Before securing the setscrew, a user installs the weight upon the spoke and the nipple by passing the them into a slot 3. The slot extends radially for the depth of the weight and has a width slightly larger than the diameter of the nipple and larger than the diameter of the spoke. The weight in the preferred embodiment has a depth greater than the length of the nipple.
And, to the right of
Viewing the alternate embodiment 1 of the spoke weight from an end,
Turning the alternate embodiment of the weight 1 once more,
Then
From the side, the preferred embodiment is shown in
Here shown in phantom below the slot towards the second end 13, the spoke weight has its aperture 12, internally threaded to receive a setscrew. The slot communicates into an opening 10 that extends from the second end 13 as a socket 15 into the body but much less than its length. The opening allows this embodiment of the spoke weight to snugly rest upon a nipple proximate the rim R as previously shown in
And then
Though
From the aforementioned description, a sized spoke weight has been described. The sized spoke weight is uniquely capable of securing to a spoke over a nipple and thus balancing a wheel. The sized spoke weight has various dimensions leading to a variety of weights available for specific balancing situations. The sized spoke weight and its various components may be manufactured from many materials, including but not limited to, brass, bronze, steel, aluminum, polymers, polyvinyl chloride, high density polyethylene, polypropylene, ferrous and non-ferrous metals, their alloys, and composites.
As such, those skilled in the art will appreciate that the conception, upon which this disclosure is based, may readily be utilized as a basis for the designing of other structures, methods and systems for carrying out the several purposes of the present invention. Therefore, the claims include such equivalent constructions insofar as they do not depart from the spirit and the scope of the present invention.
