CA2098643C - Tire balancing - Google Patents

Tire balancing Download PDF

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Publication number
CA2098643C
CA2098643C CA002098643A CA2098643A CA2098643C CA 2098643 C CA2098643 C CA 2098643C CA 002098643 A CA002098643 A CA 002098643A CA 2098643 A CA2098643 A CA 2098643A CA 2098643 C CA2098643 C CA 2098643C
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Canada
Prior art keywords
range
balancing
tire
mixture
beads
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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CA002098643A
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French (fr)
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CA2098643A1 (en
Inventor
Michael Heffernan
Russell J. Freeman
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M&R Tire Products Inc
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M&R Tire Products Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by M&R Tire Products Inc filed Critical M&R Tire Products Inc
Priority to CA002098643A priority Critical patent/CA2098643C/en
Priority to PCT/CA1994/000344 priority patent/WO1995000347A1/en
Priority to JP7502280A priority patent/JPH09501368A/en
Priority to EP94919534A priority patent/EP0705174A1/en
Priority to AU70661/94A priority patent/AU682376B2/en
Publication of CA2098643A1 publication Critical patent/CA2098643A1/en
Priority to AU49325/97A priority patent/AU716263B2/en
Application granted granted Critical
Publication of CA2098643C publication Critical patent/CA2098643C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M1/00—Testing static or dynamic balance of machines or structures
    • G01M1/30—Compensating imbalance
    • G01M1/32—Compensating imbalance by adding material to the body to be tested, e.g. by correcting-weights
    • G01M1/326—Compensating imbalance by adding material to the body to be tested, e.g. by correcting-weights the body being a vehicle wheel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C19/00—Tyre parts or constructions not otherwise provided for
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C19/00—Tyre parts or constructions not otherwise provided for
    • B60C19/003—Balancing means attached to the tyre
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C5/00—Inflatable pneumatic tyres or inner tubes
    • B60C5/004—Inflatable pneumatic tyres or inner tubes filled at least partially with liquid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/32—Correcting- or balancing-weights or equivalent means for balancing rotating bodies, e.g. vehicle wheels
    • F16F15/36—Correcting- or balancing-weights or equivalent means for balancing rotating bodies, e.g. vehicle wheels operating automatically, i.e. where, for a given amount of unbalance, there is movement of masses until balance is achieved
    • F16F15/366—Correcting- or balancing-weights or equivalent means for balancing rotating bodies, e.g. vehicle wheels operating automatically, i.e. where, for a given amount of unbalance, there is movement of masses until balance is achieved using fluid or powder means, i.e. non-discrete material

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Tires In General (AREA)
  • Testing Of Balance (AREA)

Abstract

A method and composition of matter for balancing tire and rim assemblies of vehicles is disclosed wherein the composition of matter has rounded balancing elements of different sizes to line the interior of a tire casing and to move over the lining to offset points of imbalance. The composition of matter may also include a partitioning agent and a suitable desiccant.

Description

TIRE BALANCING
BACKGROUND AND SUMMARY OF THE INVENTION
This invention relates to an improvement in a method of balancing tires using a free flowing material within a tire casing and in the composition of said material.
Most tire and rim assemblies require balancing to prevent vibration within the vehicle while it is in motion. One currently popular method of balancing tire and rim assemblies involves rotation of the assembly on a computerized balancing machine to determine the location and size of weights necessary to obtain balanced rotation. Lead weights of the determined size are then clamped to the assembly at the indicated points to complete the balancing procedure. There are other similar "fixed weight" systems known for tire balancing. Some disadvantages of this type of system are that tire balancing equipment is expensive, tire balancing requires a skilled operator and is time consuming, and tires must be rebalanced at regular intervals due to effects of varying tread wear.
Continuous self balancing systems overcome many of the disadvantages of the above fixed weight systems. Continuous self balancing systems use the principle that free flowing materials contained in a vessel in rotation will seek a distribution in balance about the centre of rotation and will tend to offset, by mass damping, any imbalance inherent in the vessel. The effectiveness of a dynamic balancing system is dependent in part on the ease with which balancing material can move within the vessel to positions which offset points of imbalance.
In one application of this principle an annular ring is placed circumferentially about a rim and partially filled with heavy materials that will flow under the influence of centrifugal force. One such balancer uses mobile weights such as ball bearings which are free to roll to any point on the ring.
The effectiveness of this method is limited by the roundness of the ball bearings, the concentricity of the ring to the geometric axis and the inherent rolling resistance of the balls in the ring.
Liquids have been attempted in self balancing systems to improve the mobility of the balancing material. U. S. 2,687,918 to Bell discloses an annular tube attached to a tire rim partially filled with mercury for continuous balancing of the tire and rim assembly. Several disadvantages exist for this method, the principal ones being high cost and toxicity of mercury, the difficulty of ensuring concentricity of the annular tube and the need for special rims.
The use of free flowing powdered materials in balancing compensators was taught in U. S. patent 4,109,549, in which an annular tube was filled with other dense materials such as powdered tungsten.
A different means for applying the self balancing principle was disclosed in U. S. 5,073,217 to Fogal. A free flowing balancing powder was placed directly within a pneumatic tire, instead of within a concentric annular tube. Pulverent polymeric/copolymeric synthetic plastic material in the range of 8-12 screen size and 40-200 screen size were disclosed. The patent taught that the powder within the tire would distribute within the tire under centrifugal forces to dampen vibration. Placing the balancing media within the tire has two primary advantages. The balancing force is positioned close to the point of imbalance and extraneous annular rings are not required. The disadvantage of Fogal is that powdered products produced from a grinder or pulverizer tend to have particles with an irregular shape which increases resistance or friction to fluidity. It is unlikely that heavy liquids, such as mercury, could be substituted advantageously in Fogal's application, however, both because of above mentioned safety reasons and because such liquids may be incompatible with or corrosive to the composition of a tire.
It is an object of the present invention to provide a method of tire balancing using an improved solid particulate material within a tire casing to obtain better fluidity for more efficient balancing of a tire and rim assembly.
The present invention uses the known principle of balancing through mass damping and the known method of using a solid material within a pneumatic tire to obtain a dynamic balance while the wheel is in rotation.
The improvement of this invention lies primarily in the composition of the mixture of the balancing material or media. A preferred size of this balancing media is in the approximate range of 10-50 mesh. The mixture can be comprised of a single media or a mixture of media. In one preferred embodiment, the mixture comprises first beads which are small, dense beads, and second beads which are larger, less dense beads. Beads of a substantially rounded shape reduce friction and improve the mobility of the material during balancing.
The small, dense beads may be formed of atomized metallic particles which form during atomization as tiny balls. Corrosion resistant metal such as bronze, brass, zinc, tin, copper, stainless steel, nickel or silver or alloys of same may be used. Selection may be made after consideration of factors such as cost, availability and suitability for forming into small rounded shapes.
In preferred embodiments the metallic component is selected from bronze, brass or zinc and atomized to form tiny balls, hereafter called "micro-spheres".
The micro-spheres have round surfaces which permit them to roll over each other with less friction than sharp edged particles. The metallic micro-spheres have the greatest density (about 5-9 gr/cm3) of the materials in the mixture so that they are urged to the outside of the other materials during rotation. The small size of the micro-spheres enables them to filter through the other materials during rotation. The interior circumference of a tire is usually riddled with small pockets and ridges produced during the tire moulding process.
These surface defects can cause erratic movement of the balancing media and thereby reduce its effectiveness. During rotation the micro-spheres are forced against the tire casing to fill in imperfections or voids on the tire wall to form a smooth lining which allows the remaining balancing media to move about the tire casing with less impediment. The excess of the micro-spheres, after voids and ridges are levelled, act as part of the balancing material and move to offset points of imbalance.
The larger, less dense beads are also rounded and may be formed from glass, ceramics, alumina, corderite, porcelain or titanates and having a density in the range of 2-5 gr/cm3. These beads function as the primary balancing material and form the largest portion by weight of the mixture.
Glass spheres or beads of density 2-3 gr/cm3 are preferred. T'he glass beads are larger but less dense than the metallic micro-spheres. Thus the glass beads tend to ride over the metallic micro-spheres to move easily to points of imbalance to dampen vibrational energy. The glass beads are more durable than thermoplastic particles of Fogal and less prone to degradation. A
preferred size range for these larger, less dense beads is 10-50 mesh.
The mixture may also include a partitioning agent, such as vermiculite having a specific gravity in the range 2-3 gr/cm3, mica or other monoclinic non-reactive crystalline minerals, to separate and lubricate the mixture to enable all components of the mixture to maintain free-flowing characteristics. Vermiculite is preferred. Other partitioning agents may be used to reduce the friction of the balancing media, for example, a lubricant can be applied to the surface of the media. Such a friction reducing agent could include silicone that is sprayed or otherwise applied to the balancing media.
Alternatively, the friction reducing agent may be applied to the interior of the tire such that it coats the tire rim assembly. Other friction reducing agents, such as Teflon, or the like, may be used in lieu of, or in addition to, silicone.
A suitable desiccant, such as silica gel, A1203, CaCl2 or CaS04 may be added to the mixture to prevent agglomeration in the presence of moisture. Silica Gel is preferred as a desiccant to maintain a dry atmosphere in the tire casing. The small particles used in this type of balancing system tend to be hydroscopic and may agglomerate in the presence of moisture.
Agglomerated particles will cause a dramatic reduction in balancing efficiency.
The silica gel tends to ameliorate this condition.
A preferred mixture of this invention is as follows.
MATERIAL SIZE CONCENTRATION
Non-ferrous atomized metal 80-325 mesh 10-30%
(e.g., bronze or brass) Glass beads 10-50 mesh 40-85%
(Lead-free soda lime type) Vermiculite 20-325 mesh 10-30%
Silica Gel 20-40 mesh 2-5%
It has been found that this invention will work effectively with any conventional mufti-wheel vehicle tire and rim assembly. It will be appreciated, however, that the amount of material to balance a particular assembly will vary in quantity and proportion, according to the type of assembly and the size of the tire and rim assembly. Correct amounts and proportions may be determined empirically by persons skilled having the benefit of this disclosure and the current state of the art. To illustrate in general terms, a steering tire of a truck (11 x 24.5) may require about 400 grams while a truck driving tire may require 500 grams of the mixture. Automobile tires may require only 160 grams of the mixture but are much more sensitive to vibration than truck tires and therefore require more vehicle specific and _ 7_ careful measuring.
BRIEF DESCRIPTION OF THE DRAWINGS
In the figures which illustrate a preferred embodiment of this invention:
Figure 1 is an illustration of a tire and rim assembly cut away to show the interior of the tire casing having the balancing material of this invention;
Figure 2 is an illustration of a cross section of a tire and rim assembly showing the balancing material of this invention; and Figure 3 is a side sectional view of a tire showing the distribution of the mixture of this invention.
DETAILED DESCRIPTION OF THE DRAWINGS
In the figures illustrating this invention like numerals indicate like elements.
In Figure 1, a tire (1) is shown mounted on a rim (2) which, in turn, is mounted on an axle (3) of a vehicle (4). The interior of the tire casing (5) is ordinarily filled with air. The balancing material (6) of this invention lies about the periphery of the tire casing (5) while the wheel is in rotation by reason of the centrifugal force exerted on the material (6).
As illustrated in Figure 2, the interior of the tire casing (5) has many voids and surface irregularities (7) (which are accentuated in the illustration).
The atomized metal micro-spheres (8) are shown to lie in and about the surface irregularities (7) of the tire casing (5). The micro-spheres (8) fill the voids and surface irregularities (7) and form a smooth, slippery surface for movement of the remainder of the balancing material. The excess of the micro-spheres acts as balancing material. Glass beads (9) roll over the micro-spheres (8) and act as the primary balancing material. Vermiculite (not shown) and silica gel (not shown) are interspersed in the material to act as a lubricant and a desiccant, respectively.
The preferred proportions of the balancing mixture for use in truck tires is as follows:
atomized metal 17%
glass beads 70%
vermiculite 10%
silica gel 3%
For automobile tires, the preferred mixture is:
micro-spheres 24%

glass beads 65%

vermiculite 9%

silica gel 2%

In operation, the balancing mixture may be poured into a new tire casing as it is assembled onto a rim. In tire rim assemblies previously constructed, the sealing bead about the rim may be broken and the mixture poured into the tire casing. Alternatively the mixture may be poured into the valve stem or mixed with the air which pressurizes the tire. Once a tire on a vehicle begins to rotate, the balancing material (6) distributes itself within the tire casing (5). As the speed of rotation increases, the metallic micro-spheres (8) tend to filter to the outside adjacent the tire casing and to fill the voids and surface irregularities (7), thereby forming a smooth inner surface. The lighter and larger glass spheres (9) then roll over the micro-spheres to adjust to a position opposite a point of imbalance (10).
As illustrated in Figure 3, the material (6) distributes within the tire casing (5) so that a thicker portion of the material (6) lies opposite the point of imbalance (10), while some of the balancing material (6) is distributed about the entire inner surface of the tire casing (5). The distribution of the balancing material (6) acts as mass damping to overcome the eccentric force which would otherwise be introduced by the point of imbalance (10), so that the tire (1) turns smoothly.

Claims (101)

1. A balancing media for balancing a tire comprising a solid particulate material spherical in shape having a mesh size in the range of 10-50.
2. The balancing media of claim 1 wherein the solid particulate material is selected from the group consisting of glass, ceramics, alumina, corderite, porcelain, titanates, and mixtures thereof.
3. The balancing media of claims 1 or 2 wherein the solid particulate material has a density in the range of 2-5 gr/cm3.
4. The balancing media of claim 1 wherein the solid particulate material comprises glass beads of lead-free soda lime glass.
5. The balancing media of claim 4 wherein the glass beads have a density in the range of 2-3 gr/cm3.
6. The balancing media of claims 1, 2, 3, 4 or 5, further comprising metallic micro-spheres having a density greater than the solid particulate material and a size smaller than the solid particulate material.
7. A balancing media for balancing a tire that can be poured into a valve stem of the tire comprising balancing beads selected from the group consisting of glass, ceramics, alumina, corderite, porcelain, titanates, and mixtures thereof.
8. The balancing media of claim 7 wherein the balancing beads are of a substantially rounded shape.
9. The balancing media of claim 7 wherein the balancing beads are substantially spherical in shape.
10. The balancing media of claims 7, 8 or 9 wherein the balancing beads have a mesh size in the range of 10-50.
11. The balancing media of claims 7, 8, 9 or 10, wherein the balancing beads have a density in the range of 2-5 gr/cm3.
12. The balancing media of claims 7, 8, 9, 10 or 11, further comprising metallic micro-spheres having a density greater than the balancing beads and a size smaller than the balancing beads.
13. The balancing media of claims 6 or 12 wherein the metallic micro-spheres are formed of atomized metallic particles.
14. The balancing media of claims 6, 12 or 13 wherein the metallic micro-spheres are selected from the group consisting of bronze, brass, zinc, tin, copper, stainless steel, nickel, silver, and alloys thereof.
15. The balancing media of claims 6, 12, 13 or 14, wherein the metallic micro-spheres have a density in the range of 5-9 gr/cm3.
16. The balancing media of claims 6, 12, 13, 14 or 15, wherein the metallic micro-spheres have a mesh size in the range of 80-325.
17. The balancing media of any one of the above claims further comprising a partitioning agent.
18. The balancing media of claim 17 wherein the partitioning agent is a monoclinic non-reactive crystalline mineral.
19. The balancing media of claim 17 wherein the partitioning agent is mica.
20. The balancing media of claim 17 wherein the partitioning agent is silicone.
21. The balancing media of claim 17 wherein the partitioning agent is Teflon R.
22. The balancing media of claim 17 wherein the partitioning agent is vermiculite.
23. The balancing media of claim 22 wherein the partitioning agent has a density in the range of 2-3 gr/cm3.
24. The balancing media of claims 22 or 23 wherein the partitioning agent has a mesh size in the range of 20-325.
25. The balancing media of any one of the above claims further comprising a desiccant.
26. The balancing media of claim 25 wherein the desiccant is silica gel.
27. The balancing media of claim 26 wherein the desiccant has a mesh size in the range of 20-40.
28. A mixture for balancing a tire comprising: a first portion in a range of 15% to 30% by weight of the mixture of first beads of atomized metallic particles having a specific gravity in the range 5-9 gr/cm3 and a mesh size in the range of 80-325; and a second portion in a range of 70% to 85% by weight of the mixture of second beads selected from the group consisting of glass, ceramics, alumina, corderite, porcelain, and titanates having a specific gravity in the range of 2-5 gr/cm3 and a mesh size in the range of 10-50.
29. A mixture for balancing a tire comprising: a first portion in a range of 10% to 30% by weight of the mixture of first beads of atomized metallic particles having a specific gravity in the range 5-9 gr/cm3 and a mesh size in the range of 80-325; and a second portion in a range of 60% to 80% by weight of the mixture of second beads selected from the group consisting of glass, ceramics, alumina, corderite, porcelain and titanates having a specific gravity in the range of 2-5 gr/cm3 and a mesh size in the range of 10-50; and having a third portion in the range of 5% to 15% by weight of the mixture of a partitioning and lubricating particulate material having a specific gravity in the range of 2-3 gr/cm3 and a mesh size in the range of 20-325.
30. A mixture for balancing a tire comprising: a first portion in a range of 10% to 30% by weight of the mixture of first beads of atomized metallic particles having a specific gravity in the range 5-9 gr/cm3 and a mesh size in the range of 80-325; and a second portion in a range of 60% to 80% by weight of the mixture of second beads selected from the group consisting of glass, alumina, corderite, porcelain, and titanates having a specific gravity of 2-5 gr/cm3 and a mesh size in the range of 10-50; and having a third portion in the range of 5% to 15% by weight of the mixture of a partitioning and lubricating particulate material having a specific gravity in the range of 2-3 gr/cm3 and a mesh size in the range of 20-325; and having a fourth portion in the range of 1% to 5% by weight of the mixture of a desiccating particulate matter of a mesh size in the range of 20-40.
31. A mixture for balancing a tire comprising: a first portion in a range of 15% to 30% by weight of the mixture of first beads of atomized metallic micro-spheres having a specific gravity in the range 5-9 gr/cm3 and a mesh size in the range of 80-325; and a second portion in a range of 70% to 85% of the mixture of second beads of glass having a specific gravity of 2-5 gr/cm3 and a mesh size in the range of 10-50.
32. A mixture for balancing a tire comprising: a first portion in a range of 10% to 30% by weight of the mixture of first beads of atomized metallic micro-spheres having a specific gravity in the range 5-9 gr/cm3 and a mesh size in the range of 80-325; and a second portion in a range of 60% to 80% by weight of the mixture of second beads of glass having a specific gravity of 2-5 gr/cm3 and a mesh size in the range of 10-50; and having a third portion in the range of 5% to 15% by weight of the mixture of vermiculite having a specific gravity in the range of 2-3 gr/cm3 and a mesh size in the range of 20-325.
33. A mixture for balancing a tire comprising: a first portion in a range of 10% to 30% by weight of the mixture of first beads of atomized metallic micro-spheres having a specific gravity in the range 5-9 gr/cm3 and a mesh size in the range of 80-325; and a second portion in a range of 60% to 80% by weight of the mixture of second beads of glass having a specific gravity of 2-5 gr/cm3 and a mesh size in the range of 10-50; and having a third portion in the range of 5% to 15% by weight of the mixture of vermiculite having a specific gravity in the range of 2-3 gr/cm3 and a mesh size in the range of 20-325; and having a fourth portion in the range of 1% to 5% by weight of the mixture of silica gel of a mesh size in the range of 20-40.
34. A mixture for balancing a truck tire comprising, by weight: atomized metallic micro-spheres in the range from 15% to 20% of the mixture having a specific gravity in the range of 5-9 gr/cm3 and having a mesh size in the range of 80-325; glass spheres in the range of 65% to 75% of the mixture having a specific gravity of 2-5 gr/cm3 and a mesh size in the range of 10-50;
vermiculite in the range of 7% to 12% of the mixture and having a mesh size of 20-325 and a specific gravity of 2-3 gr/cm3; and silica gel in the range of 2%
to 4% of the mixture having a mesh size in the range of 20-40.
35. A mixture for balancing a truck tire comprising, by weight: 17%
atomized metal selected from the group consisting of brass, bronze and zinc having a specific gravity in the range of 5-9 gr/cm3 and having a mesh size in the range of 80-325, 70%; glass beads of lead-free soda lime glass having a specific gravity in the range of 2-5 gr/cm3 and having a mesh size in the range of 10-50; 10% vermiculite having a specific gravity in the range of 2-3 gr/cm3 and having a mesh size in the range of 20-325; and 3% silica gel having a mesh size in the range of 20-40.
36. A mixture for balancing an automobile tire comprising: atomized metallic micro-spheres in the range of 20% to 30% of the mixture by weight having a specific gravity in the range of 5-9 gr/cm3 and having a mesh size in the range of 80-325; glass beads in the range of 60% to 70% having a specific gravity in the range of 2-5 gr/cm3 and having a mesh size in the range of 10-50; vermiculite in the range of 5% to 12% having a specific gravity in the range of 2-3 gr/cm3 and having a mesh size in the range of 20-325; and silica gel in the range of 1% to 3% having a mesh size in the range of 20-40.
37. A mixture for balancing an automobile tire comprising by weight: 24%
of atomized metallic micro-spheres selected from the group consisting of brass, bronze and zinc having a specific gravity in the range of 5-9 gr/cm3 and having a mesh size in the range of 80-325; 65% of glass beads of lead-free soda lime glass having a specific gravity of 2-5 gr/cm3 and a mesh size in the range of 10-50; 9% of vermiculite having a specific gravity in the range of 2-3 gr/cm3 and having a mesh size in the range of 20-325; and 2% of silica gel having a mesh size in the range of 20-40.
38. A method for balancing a tire rim assembly during rotation comprising the steps of:
providing a tire rim assembly having a hollow tire casing surrounding the space about the rim defining an interior space and having a point of imbalance when the interior of the tire is pressurized with air;
adding a balancing media comprising solid spherically shaped particulate material into the interior of the tire casing before or during pressurization with air, the balancing media having a size of about 10-50 mesh;
and rotating the tire rim assembly to distribute the balancing media within the tire casing to offset the point of imbalance.
39. A method for continuous self balancing of a tire rim assembly during rotation comprising the steps of:
providing a tire rim assembly having a hollow tire casing surrounding the space about the rim defining an interior space and having a point of imbalance when the interior of the tire is pressurized with air;
adding a balancing media comprising solid spherically shaped particulate material into the interior of the tire casing before or during pressurization with air, the balancing media having a size of about 10-50 mesh;
rotating the tire rim assembly to distribute the balancing media within the tire casing; and continuously self-balancing the tire rim assembly by rotating the pressurized tire rim assembly and distributing the balancing media within the tire casing so that a thicker portion of the balancing media lies opposite the point of imbalance.
40. The method according to claims 38 or 39 wherein the solid particulate material has a density of about 2-5 gr/cm3.
41. The method according to claims 38, 39 or 40, wherein the solid particulate material is selected from the group consisting of glass, ceramics, alumina, corderite, porcelain, titanates, and mixtures thereof.
42. The method according to claims 38, 39 or 40 wherein the solid particulate material comprises glass beads.
43. The method according to any one of claims 38 to 42 wherein the balancing media further comprises metallic micro-spheres having a density greater than the solid particulate material and a size smaller than the solid particulate material.
44. A method for balancing a tire rim assembly during rotation comprising, the steps of:

providing a tire rim assembly having a hollow tire casing surrounding the space about the rim defining an interior space and having a point of imbalance when the interior of the tire is pressurized with air;
adding a balancing media comprising balancing beads selected from the group consisting of glass, ceramics, alumina, corderite, porcelain, titanates, and mixtures thereof, into the interior of the tire casing before or during pressurization with air; and rotating the tire rim assembly to distribute the balancing media within the tire casing to offset the point of imbalance.
45. A method for continuous self balancing of a tire rim assembly during rotation comprising, the steps of:
providing a tire rim assembly having a hollow tire casing surrounding the space about the rim defining an interior space and having a point of imbalance when the interior of the tire is pressurized with air;
adding a balancing media comprising balancing beads selected from the group consisting of glass, ceramics, alumina, corderite, porcelain, titanates, and mixtures thereof, into the interior of the tire casing before or during pressurization with air;
rotating the tire rim assembly to distribute the balancing media within the tire casing; and continuously self-balancing the tire rim assembly by rotating the pressurized tire rim assembly and distributing the balancing media within the tire casing so that a thicker portion of the balancing media lies opposite the point of imbalance.
46. The method according to claims 44 or 45 wherein the balancing beads are of a substantially rounded shape.
47. The method according to claims 44 or 45 wherein the balancing beads are substantially spherical in shape.
48. The method according to claims 44, 45, 46 or 47 wherein the balancing beads have a mesh size in the range of 10-50.
49. The method according to claims 44, 45, 46, 47 or 48, wherein the balancing beads have a density in the range of 2-5 gr/cm3.
50. The method according to any one of claims 44 to 49 wherein the balancing media further comprises metallic micro-spheres having a density greater than the balancing beads and a size smaller than the balancing beads.
51. The method according to claims 43 or 50 wherein the metallic micro-spheres are formed of atomized metallic particles.
52. The method according to claims 43 or 50 wherein the metallic micro-spheres are selected from the group consisting of bronze, brass, zinc, tin, copper, stainless steel, nickel, silver, and alloys thereof.
53. The method according to claims 43, 50, 51 or 52, wherein the metallic micro-spheres have a density in the range of 5-9 gr/cm3.
54. The method according to claims 43, 50, 51, 52 or 53, wherein the metallic micro-spheres have a mesh size in the range of 80-325.
55. The method according to any one of claims 38 to 54 wherein the balancing media further comprises a partitioning agent.
56. The method according to claim 55 wherein the partitioning agent is a monoclinic non-reactive crystalline mineral.
57. The method according to claim 55 wherein the partitioning agent is mica.
58. The method according to claim 55 wherein the partitioning agent is silicone.
59. The method according to claim 55 wherein the partitioning agent is Teflon®.
60. The method according to claim 55 wherein the partitioning agent is vermiculite.
61. The method according to claim 60 wherein the partitioning agent has a density in the range of 2-3 gr/cm3.
62. The method according to claims 60 or 61 wherein the partitioning agent has a mesh size in the range of 20-325.
63. The method according to any one of claims 38 to 62 wherein the balancing media further comprises a desiccant.
64. The method according to claim 63 wherein the desiccant is silica gel.
65. The method according to claim 64 wherein the desiccant has a mesh size in the range of 20-40.
66. The method according to any one of claims 38 to 65 wherein the balancing media is added during pressurization of the tire rim assembly.
67. The method according to any one of claims 38 to 65 wherein the balancing media is added during the assembly of the tire and the rim.
68. A method for balancing a tire rim assembly comprising the steps of:
providing a tire rim assembly having a hollow tire casing surrounding a space about the rim, said space to be filled and pressurized with air;
pouring a mixture into the interior of the tire casing, said mixture comprising a first weight portion of first beads atomized metallic micro-spheres having a first density and a first size and a second weight portion of second beads of glass having a second density and a second size wherein said first weight portion is less than said second weight portion, said first density is greater than said second density and said first size is smaller than said second size; and rotating the tire rim assembly to distribute the material within the tire casing to offset forces of imbalance.
69. The method of claim 68 in which the first portion is in a range of 10% to 30% by weight, the second portion is in a range of 60% to 80% by weight and where the mixture includes a third portion in the range of 5% to 15% by weight of a mixture of vermiculite having a specific gravity in the range of 2-3 gr/cm3 and a mesh size in the range of 20-325
70. The method of claim 68 in which the first is in a range of 10% to 30% by weight, the second portion in a range of 60% to 80% by weight and where the mixture includes a third portion in the range of 5% and 15% by weight of the mixture of vermiculite having a specific gravity in the range of 2-3 gr/cm3 and a mesh size in the range of 20-325 and a fourth portion in the range of 1% to 5% by weight of the mixture of silica gel of a mesh size in the range of 20-40.
71. The method of claim 68 in which the tire casing is a truck tire where the atomized metallic micro-spheres are in the range from 15% to 20% by weight of the mixture, the glass beads are in the range of 65% to 75% of the mixture, and where the mixture also includes vermiculite in the range of 7% to 12% by weight of the mixture and silica get in the range of 2% to 4% by weight of the mixture.
72. The method of claim 68 in which the tire casing is a truck tire where the atomized metallic micro-spheres comprise 17% by weight and are composed of metal selected from the group consisting of brass, bonze and zinc, the glass beads comprise 70% by weight of lead-free soda lime glass, and further characterized in that the mixture contains 10% by weight of vermiculite and 3%
by weight of silica gel.
73. The method of claim 68 in which the tire casing is an automobile tire and the atomized metallic micro-spheres are in the range of 20% to 30% of the mixture by weight, the glass beads are in the range of 60% to 70% by weight and the mixture also contains vermiculite in the range of 5% to 12% by weight and silica gel in the range of 1% to 3% by weight.
74. The method of claim 68 in which the tire casing is an automobile tire and the atomized metallic micro-spheres comprise 24% by weight and are composed of metal selected from the group consisting of brass, bronze and zinc, the glass beads comprise 65% by weight of lead-free soda lime glass and further characterized in that the mixture contains 9% by weight vermiculite and 2% by weight silica gel.
75. A method for balancing a tire rim assembly comprising the steps of:
providing a tire rim assembly having a hollow tire casing surrounding a space about the rim, said space to be filled and pressurized with air;
pouring a mixture into the interior of the tire casing, said mixture comprising a first portion in the range of 15% to 30% by weight of the mixture of first beads of atomized metallic micro-spheres having a specific gravity in the range of 5-9 gr/cm3 and a mesh size in the range of 80-325; and a second portion in a range of 70% to 85% by weight of the mixture of second beads of glass having a specific gravity of 2-5 gr/cm3 and a mesh size in the range of 10-50; and rotating the tire rim assembly to distribute the material with the tire casing to offset forces of imbalance.
76. A system for maintaining a rotating tire rim assembly in balance comprising:
a tire rim assembly having a hollow tire casing surrounding a space about the rim and having a point of imbalance when said space is pressurized with air; and a balancing media located in the interior of the tire casing, wherein the balancing media is a solid spherically shaped particulate material, the balancing media having a size of about 10-50 mesh, so that when the tire rim assembly is rotated the balancing media is distributed within the tire casing so that a thicker portion of the balancing media lies opposite the point of imbalance.
77. The system according to claim 76 wherein the solid particulate material has a density of about 2-5 gr/cm3.
78. The system according to claims 76 or 77, wherein the solid particulate material is selected from the group consisting of glass, ceramics, alumina, corderite, porcelain, titanates, and mixtures thereof.
79. The system according to claims 76 or 77 wherein the solid particulate material comprises glass beads.
80. The system according to any one of claims 76 to 79 wherein the balancing media further comprising metallic micro-spheres having a density greater than the solid particulate material and a size smaller than the solid particulate material.
81. A system for maintaining a rotating tire rim assembly in balance comprising:
a tire rim assembly having a hollow tire casing surrounding a space about the rim and having a point of imbalance when said space is pressurized with air; and a balancing media located in the interior of the tire casing, wherein the balancing media comprises balancing beads selected from the group consisting of glass, ceramics, alumina, corderite, porcelain, titanates, and mixtures thereof, so that when the tire rim assembly is rotated the balancing media is distributed within the tire casing so that a thicker portion of the balancing media lies opposite the point of imbalance.
82. The system according to claim 81 wherein the balancing beads are of a substantially rounded shape.
83. The system according to claim 81 wherein the balancing beads are substantially spherical in shape.
84. The system according to claims 81, 82 or 83 wherein the balancing beads have a mesh size in the range of 10-50.
85. The system according to claims 81, 82, 83 or 84, wherein the balancing beads have a density in the range of 2-5 gr/cm3.
86. The system according to any one of claims 81 to 85 wherein the balancing media further comprises metallic micro-spheres having a density greater than the balancing beads and a size smaller than the balancing beads.
87. The system according to claims 80 or 86 wherein the metallic micro-spheres are formed of atomized metallic particles.
88. The system according to claims 80 or 86 wherein the metallic micro-spheres are selected from the group consisting of bronze, brass, zinc, tin, copper, stainless steel, nickel, silver, and alloys thereof.
89. The system according to claims 80, 86, 87 or 88, wherein the metallic micro-spheres have a density in the range of 5-9 gr/cm3.
90. The system according to claims 80, 86, 87, 88 or 89, wherein the metallic micro-spheres have a mesh size in the range of 80-325.
91. The system according to any one of claims 76 to 90 wherein the balancing media further comprises a partitioning agent.
92. The system according to claim 91 wherein the partitioning agent is a monoclinic non-reactive crystalline mineral.
93. The system according to claim 91 wherein the partitioning agent is mica.
94. The system according to claim 91 wherein the partitioning agent is silicone.
95. The system according to claim 91 wherein the partitioning agent is Teflon®.
96. The system according to claim 91 wherein the partitioning agent is vermiculite.
97. The system according to claim 96 wherein the partitioning agent has a density in the range of 2-3 gr/cm3.
98. The system according to claims 96 or 97 wherein the partitioning agent has a mesh size in the range of 20-325.
99. The system according to any one of claims 76 to 98 wherein the balancing media further comprises a desiccant.
100. The system according to claim 99 wherein the desiccant is silica gel.
101. The system according to claim 100 wherein the desiccant has a mesh size in the range of 20-40.
CA002098643A 1993-06-17 1993-06-17 Tire balancing Expired - Lifetime CA2098643C (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
CA002098643A CA2098643C (en) 1993-06-17 1993-06-17 Tire balancing
PCT/CA1994/000344 WO1995000347A1 (en) 1993-06-17 1994-06-17 Tire balancing
JP7502280A JPH09501368A (en) 1993-06-17 1994-06-17 Tire balancing
EP94919534A EP0705174A1 (en) 1993-06-17 1994-06-17 Tire balancing
AU70661/94A AU682376B2 (en) 1993-06-17 1994-06-17 Tire balancing
AU49325/97A AU716263B2 (en) 1993-06-17 1997-12-31 Tire balancing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA002098643A CA2098643C (en) 1993-06-17 1993-06-17 Tire balancing

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CA2098643A1 CA2098643A1 (en) 1994-12-18
CA2098643C true CA2098643C (en) 2002-01-29

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JP (1) JPH09501368A (en)
AU (1) AU682376B2 (en)
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US9777207B2 (en) 2013-01-29 2017-10-03 Halliburton Energy Services, Inc. Wellbore fluids comprising mineral particles and methods relating thereto

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Publication number Priority date Publication date Assignee Title
WO2023150873A1 (en) * 2022-02-08 2023-08-17 Counteract Balancing Beads Inc. System and method for tire balancing

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WO1995000347A1 (en) 1995-01-05
JPH09501368A (en) 1997-02-10
AU7066194A (en) 1995-01-17
CA2098643A1 (en) 1994-12-18
EP0705174A1 (en) 1996-04-10
AU682376B2 (en) 1997-10-02

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