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81'' US 20030041946A1 (19) United States (12) Patent Application Publication (10) Pub. N0.: US 2003/ 0041946 A1 Fogal, SR. (43) Pub. Date: Mar. 6, 2003 (54) METHOD OF BALANCING A VEHICLE noW abandoned, Which is a continuation of applica WHEEL ASSEMBLY tion No. 07/599,776, ?led on Oct. 17, 1990, noW Pat. No. 5,073,217. (76) Inventor: Robert D. Fogal SR., Chambersburg, PA (US) Publication Classi?cation Correspondence Address: (51) Int. c1.7 .......................... .. G01M 1/00; B29C 35/00 HAHN LOESER & PARKS, LLP (52) US. Cl. ......................................... .. 156/75; 156/1101 TWIN OAKS ESTATE 1225 W. MARKET STREET (57) ABSTRACT AKRON, OH 44313 (US) A method of balancing a Wheel assembly is achieved by (21) Appl. No.: 10/234,502 providing a Wheel assembly Which includes a tire in a range substantially betWeen 13“ and 24.5“ siZe, providing pulveru (22) Filed: Sep. 4, 2002 lent polymeric/copolymeric synthetic plastic material in a range substantially betWeen 8-12 screen siZe and 40-200 Related US. Application Data screen siZe, and placing a selected screen siZe range of the pulverulent material in free movable relationship to the tire (63) Continuation of application No. 08/184,735, ?led on in a Weight range substantially betWeen 1/2 ounce to 24 Jan. 21, 1994, Which is a continuation-in-part of ounces for the tire siZe ranges of substantially betWeen 13“ application No. 07/750,687, ?led on Aug. 27, 1991, to 24.5“ siZe. 81''" Patent Application Publication Mar. 6, 2003 Sheet 1 0f 5 US 2003/0041946 A1 Patent Application Publication Mar. 6, 2003 Sheet 2 0f 5 US 2003/0041946 A1 tsmw.\ 55.. 3.50m\1 cummm&_n_ /Q 2%30:3383m33:; 2“:$20k309.5 wkE 1%_\, M\fmmu. KNa E Patent Application Publication Mar. 6, 2003 Sheet 3 0f 5 US 2003/0041946 A1 FIG. 7 4. O 5 m3 nu 25 __ _- _ m21| 5O FIG. 8 FREQUENCY IN HZ 433 0 5 uh 25 -~ _ m21 5O _ FREQUENCY IN HZ Patent Application Publication Mar. 6, 2003 Sheet 4 0f 5 US 2003/0041946 A1 FIG. 9 4 0 r : U0% P-PDiSPLACEMENTINMILS 25 __ 58<11 Il O 5 10 1'5 2'0 25 3o 35 4o FIG. 10 FREQUENCY IN HZ 40 | 30 P—-PDISPLACEMENTINMILS 25 -_ 15- 10 0 I l I A!‘ 5 10 1'5 20 2'5 50 55 40 FREQUENCY IN HZ Patent Application Publication Mar. 6, 2003 Sheet 5 0f 5 US 2003/0041946 A1 COMPARISON SPECTRUM 8 10 12 14 16 18 20 FREQUENCY IN HZ DIFFERENCE A W\/—“\ 10 12 14 16 18 20 FREQUENCY IN HZ 60 R B M mm FF 283z_.1 n.n NlI | UE EDI m all2“.4Ewwwwkbma _Ewing/2&5 M15%..5 Ws O0O"W _wC0 m7m-7 O6D 000O0O0O0 F R U E N -sm-3 ..4wu.-4 I212 i?w?iii 8 FREQUENCY IN HZ US 2003/0041946 A1 Mar. 6, 2003 METHOD OF BALANCING A VEHICLE WHEEL radial force variation and achieve load force equaliZation. In ASSEMBLY other Words, a greater amount of the pulverulent material is forced to the areas opposite the greater impact forces BACKGROUND OF THE INVENTION Whereas a lesser amount of the granules Will remain in the area opposite the lesser load forces, both sideWall-to-side [0001] The invention is directed to a method of balancing Wall across the footprint of the tread and, of course, circum a vehicle Wheel assembly, such as Wheel assemblies of ferentially about the tire. In this fashion, irrespective of the passenger and truck vehicles and aircraft. This application is a continuation of pending US. patent application Ser. No. speci?c load force at any point betWeen tire and surface, eventual continuous tire rotation and tire load force variation 08/184,735 ?led Jan. 21, 1994, herein incorporated by results in displacement of the pulverulent material until all reference; Which is a continuation-in-part of US. patent radial force variations have been equaliZed, thereby placing application Ser. No. 07/750,687 ?led Aug. 27, 1991, noW the Wheel assembly in complete “balance”. abandoned; Which is a continuation of US. patent applica tion Ser. No. 07/599,776 ?led Oct. 17, 1990, noW issued as [0004] The aforesaid balancing is achieved instanta US. Pat. No. 5,073,217. neously because the pulverulent material is relatively light, [0002] The related art directed to the present invention is free ?oWing and thus “moves” rapidly and continually under exempli?ed by US. Pat. No. 2,909,389 in the name of John constant variable load forces. C. Wilborn Which Was granted on Oct. 20, 1959. In accor [0005] Furthermore, the preferred pulverulent material in dance With this patent, globular Weights are placed in a tube the most preferred embodiment is compatible With the tire Which is eventually placed in a biased tire and the tire is innerliners to lubricate (or at least not abrade) and thereby eventually placed upon a Wheel Which is in turn placed upon maintain or add resiliency to the innerliners. Normally, a vehicle. When the Wheel rotates, the Weights are throWn plasticiZers Within the innerliners tend to migrate out of the against the inner surface of the outer Wall of the tube, and the innerliners through the body of the tire causing degradation imbalance of the Wheel is said to be corrected by the position of the rubber resulting in increased innerliner porosity and assumed by the globular Weights. This method is said to tire sideWall cracking. Thus, the pulverulent material not avoid the conventional method of balancing Wheels of motor only alloWs instant response to load force variation and vehicles by crimping lead Weights on the edges of the rims impact force because of the light Weight thereof, but long of the Wheels and, through proper balancing, vibration of the innerliner life and thus long tire life is also assured because vehicle is lessened and so, too, should be uneven Wear on the of the lubricity characteristics of the polymeric resin pul tires, excessive Wear on the bearings, the shock absorbers, verulent material. the steering mechanism and other parts of the vehicle. The siZe, shape and design of the globular Weights are not [0006] With the above, and other objects in vieW that Will speci?ed in this patent other than the obviously globular hereinafter appear, the nature of the invention Will be more con?guration best illustrated in FIG. 3. HoWever, the same clearly understood by reference to the folloWing detailed patentee had granted to him on Mar. 6, 1956, US. Pat. No. description, the appended claims and the several vieWs 2,737,420 in Which a Wheel is balanced by forming an illustrated in the accompanying draWings. annular channel in a rim into Which a liquid is inserted along With globular Weights. These globular Weights are described BRIEF DESCRIPTION OF THE DRAWINGS in this patent as lead or steel shot. Accordingly, the patents collectively utiliZe globular Weights of lead or steel shot per [0007] FIG. 1 is a fragmentary side elevational vieW of a se or in conjunction With the liquid for balancing biased tires conventional Wheel assembly including a tire carried by a under the centrifugal force created during in-use tire rota rim, and illustrates a loWer portion or “footprint” of the tire tion. tread resting upon and bearing against an associated sup porting surface, such as a road. SUMMARY OF THE INVENTION [0008] FIG. 2 is an axial vertical cross sectional vieW [0003] In accordance With the method of the present through the Wheel assembly of FIG. 1 and additionally invention, a Wheel assembly is balanced utiliZing force illustrates the lateral extent of the footprint When the tire variations and centrifugal forces as tires rotate in use With rests under load upon the road surface. the associated vehicles. HoWever, in contradistinction to knoWn prior art methods, including those of the Wilborn [0009] FIG. 3 is an enlarged cross sectional vieW identical patents, the present balancing method utiliZes forces Which to FIG. 2, and illustrates the manner in Which the pulveru are present Within the Wheel assembly When in use and lent material are deposited Within an interior of a tire through Which virtually change continuously as vehicle speeds and an associated tire valve. loads change. Thus, the method seeks not simply to reduce [0010] FIG. 4 is a fragmentary cross sectional vieW of an vibration attributed to What might be loosely termed “imbal apparatus for injecting the pulverulent material into the tire ance”, but also reduces vibration caused by excessive radial of FIG. 3, and illustrates a valve core removed from the tire run-out, or lateral tread area force variation, and does so valve incident to the injection of the pulverulent material through the utiliZation of granules and/or poWder (pulveru into the tire through the air valve. lent material) of speci?ed siZe, Weight and quantity to affect equalization of the force variations over the entire “foot [0011] FIG. 5 is a cross sectional vieW of the Wheel print” of a tire. Thus, due to the nature, siZe and quantity of assembly of FIG. 3 during rotation, and illustrates a plural the pulverulent material, increased amplitude associated ity of radial load forces of different variations or magnitudes With greater tire-to-road impact forces the pulverulent mate reacting betWeen the tire and the road surface as the tire rial proportionately toWard such areas to null or eliminate rotates, and the manner in Which the pulverulent material are US 2003/0041946 A1 Mar. 6, 2003 forced from the position shoWn in FIG.
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