CA2216744C - Tire balancing using glass beads - Google Patents
Tire balancing using glass beads Download PDFInfo
- Publication number
- CA2216744C CA2216744C CA002216744A CA2216744A CA2216744C CA 2216744 C CA2216744 C CA 2216744C CA 002216744 A CA002216744 A CA 002216744A CA 2216744 A CA2216744 A CA 2216744A CA 2216744 C CA2216744 C CA 2216744C
- Authority
- CA
- Canada
- Prior art keywords
- tire
- glass beads
- lubricant
- balancing material
- imbalance
- 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
Links
- 239000011324 bead Substances 0.000 title claims abstract description 56
- 239000011521 glass Substances 0.000 title claims abstract description 51
- 239000000463 material Substances 0.000 claims abstract description 47
- 238000000034 method Methods 0.000 claims description 16
- 239000000314 lubricant Substances 0.000 claims description 11
- 229920001296 polysiloxane Polymers 0.000 claims description 6
- 230000035939 shock Effects 0.000 abstract description 3
- 230000005012 migration Effects 0.000 abstract 1
- 238000013508 migration Methods 0.000 abstract 1
- 230000000284 resting effect Effects 0.000 abstract 1
- 230000006866 deterioration Effects 0.000 description 4
- 239000000428 dust Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 206010067484 Adverse reaction Diseases 0.000 description 1
- 229910001369 Brass Inorganic materials 0.000 description 1
- 230000006838 adverse reaction Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
Classifications
-
- 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
-
- 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
- F16F15/363—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 rolling bodies, e.g. balls free to move in a circumferential direction
-
- 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
- F16F7/00—Vibration-dampers; Shock-absorbers
- F16F7/01—Vibration-dampers; Shock-absorbers using friction between loose particles, e.g. sand
- F16F7/015—Vibration-dampers; Shock-absorbers using friction between loose particles, e.g. sand the particles being spherical, cylindrical or the like
-
- 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
- G01M1/36—Compensating imbalance by adjusting position of masses built-in the body to be tested
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- General Physics & Mathematics (AREA)
- Graft Or Block Polymers (AREA)
- Tires In General (AREA)
Abstract
A free-flowing material made up of glass beads. The glass bead material are introduced into a imbalanced tire. The motion of the imbalanced tire encourages the glass bead material to migrate to areas of the inside tire lining so as to correct the imbalance. Once the tire is balanced, the glass bead material migration come to a general stop and generally remain on the resting area of the inside tire liner until a sudden shock is applied on the tire.
Description
TIRE BALANCING USING GLASS BEADS
BACKGROUND OF THE INVENTION
Field of the Invention This invention relates to free-flowing materials used to balance tires.
Description of the Prior Art Tire balance is important for vehicle ride and stability and for customer satisfaction as well. Tires, wheels, rims, brake drums, rotors and hubs are all manufactured to a close tolerance for roundness, shape and balance. By assembling all these tolerances together, the probability of this assembly being out of balance is high. Wheel imbalance causes forces that result in vibration through the vehicle's steering, suspension and body. Imbalance is the cause of the majority of vibration complaints.
One method of solving tire imbalance is to use a free-flowing balancing material within the imbalanced tire. The material is first introduced at mounting or a mounted tire. The tire retains proper balance simply because the free-flowing material, the minuscule individual elements making up the material, inside the tire are distributed in such a way that evens out the heavy spot in the tire assembly. Glycol and fibres were first used about thirty years ago, while silica was used about 10 years ago in type of tire balancing.
In the case of a rotating tire and wheel, a heavy spot creates a force away from the tire, but because it is anchored by the wheel, an opposite force is created within the tire. This will draw a sufficient quantity of the balancing material in the direction of the opposite force until the heavy spot is neutralized. In currently available material, the remaining balancing material spreads itself evenly around the inside of the tire, and remains in place on the liner of the tire until the vehicle stops.
This method of balancing tires is that if the heavy spot changes over time, the dry material re-balances the tire in a self adjusting manner. Further, the granules that are presently used have good durability characteristics.
Unfortunately, this constant "on the liner" and "off the liner" motion has problems; for instance, some of the currently available balancing materials deteriorate through this constant "on"-"off" motion into dust particles. This deterioration causes mounting and dismounting problems for tire installers as the dust forms an undesirable coat on the wheel and the tire mounting surface. Further still, the deterioration occasionally clogs the tire valve seat causing an air leak.
Another problem that exists with currently available balancing materials is that the materials are abrasive in nature. The abrasive characteristic of currently available materials along with the rotating action of the tires causes undesirable wearing down from the inside of the tire. The absorption of moisture is another problem facing currently available materials. By absorbing moisture these materials clump together. Further still, another problem encountered with some currently available materials is that the materials sometimes react to the alloyed wheels. One such current material has brass tracings that react to aluminum wheels.
Therefore, there exists a need to provide an alternative free-flowing balancing material to overcome some of the drawbacks of currently available materials.
SUMMARY OF THE INVENTION
It is an object of the invention to overcome some the drawbacks of the currently available materials.
It is another object of the invention to provide a free-flowing material having little moisture absorption characteristics.
It is another object of the invention to provide a free-flowing material having low deterioration characteristics.
It is another object of the invention to provide a free-flowing material having a non-abrasive characteristics when in use within the tire.
It is another object of the invention to provide a free-flowing material not having an adverse reaction to contact with metal or rubber.
It is another object of the invention to provide a dielectric material which charges and remains in place by electrostatic attraction.
BACKGROUND OF THE INVENTION
Field of the Invention This invention relates to free-flowing materials used to balance tires.
Description of the Prior Art Tire balance is important for vehicle ride and stability and for customer satisfaction as well. Tires, wheels, rims, brake drums, rotors and hubs are all manufactured to a close tolerance for roundness, shape and balance. By assembling all these tolerances together, the probability of this assembly being out of balance is high. Wheel imbalance causes forces that result in vibration through the vehicle's steering, suspension and body. Imbalance is the cause of the majority of vibration complaints.
One method of solving tire imbalance is to use a free-flowing balancing material within the imbalanced tire. The material is first introduced at mounting or a mounted tire. The tire retains proper balance simply because the free-flowing material, the minuscule individual elements making up the material, inside the tire are distributed in such a way that evens out the heavy spot in the tire assembly. Glycol and fibres were first used about thirty years ago, while silica was used about 10 years ago in type of tire balancing.
In the case of a rotating tire and wheel, a heavy spot creates a force away from the tire, but because it is anchored by the wheel, an opposite force is created within the tire. This will draw a sufficient quantity of the balancing material in the direction of the opposite force until the heavy spot is neutralized. In currently available material, the remaining balancing material spreads itself evenly around the inside of the tire, and remains in place on the liner of the tire until the vehicle stops.
This method of balancing tires is that if the heavy spot changes over time, the dry material re-balances the tire in a self adjusting manner. Further, the granules that are presently used have good durability characteristics.
Unfortunately, this constant "on the liner" and "off the liner" motion has problems; for instance, some of the currently available balancing materials deteriorate through this constant "on"-"off" motion into dust particles. This deterioration causes mounting and dismounting problems for tire installers as the dust forms an undesirable coat on the wheel and the tire mounting surface. Further still, the deterioration occasionally clogs the tire valve seat causing an air leak.
Another problem that exists with currently available balancing materials is that the materials are abrasive in nature. The abrasive characteristic of currently available materials along with the rotating action of the tires causes undesirable wearing down from the inside of the tire. The absorption of moisture is another problem facing currently available materials. By absorbing moisture these materials clump together. Further still, another problem encountered with some currently available materials is that the materials sometimes react to the alloyed wheels. One such current material has brass tracings that react to aluminum wheels.
Therefore, there exists a need to provide an alternative free-flowing balancing material to overcome some of the drawbacks of currently available materials.
SUMMARY OF THE INVENTION
It is an object of the invention to overcome some the drawbacks of the currently available materials.
It is another object of the invention to provide a free-flowing material having little moisture absorption characteristics.
It is another object of the invention to provide a free-flowing material having low deterioration characteristics.
It is another object of the invention to provide a free-flowing material having a non-abrasive characteristics when in use within the tire.
It is another object of the invention to provide a free-flowing material not having an adverse reaction to contact with metal or rubber.
It is another object of the invention to provide a dielectric material which charges and remains in place by electrostatic attraction.
Furtherfeatures of the invention will be described orwill become apparent in the course of the following detailed description.
BRIEF DESCRIPTION OF THE DRAWINGS
In order that the invention may be more clearly understood, the preferred embodiment thereof will now be described in detail by way of example, with reference to the accompanying drawings, in which:
Fig. 1 is an enlarged view of the of glass beads;
Fig. 2 is a cross-sectional view of a tire with the glass beads being injected inside of the tire;
Fig. 3 is a side view of a wheel assembly illustrating a heavy spot and the approximate location of the counterbalancing glass beads;
Fig. 4 is an application chart for the glass beads; and, Fig. 5 is an application chart (a continuation of Fig. 4) for the glass beads.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
The accompanying drawings illustrate the invention. With reference to Figure 1, the tire balancing beads are spherical in shape. The glass beads 1 are introduced into the hollow interior of the tire 2 by one of two methods. In the first method, a desired amount of glass beads may be poured into the tire well before the tire is mounted onto the wheel (not shown). The tire is then inflated after mounting. In the second method, as shown in Figure 2, a pre-mounted tire is deflated, and an in-line air filter container 3 is filled with the desired amount of the glass bead material. The in-line air filter container 3 is flipped upside down. The air intake end 4 is connected to a typical pressurized tire air supply. The air exit 5 is connected to the tire valve 6 connector. Valve 7 is opened thereby pressurizing the material housing. Valve 8 is subsequently opened . Approximately thirty seconds later the glass bead material is completely injected into the tire. The tire may then continue to be inflated to a desired tire pressure.
BRIEF DESCRIPTION OF THE DRAWINGS
In order that the invention may be more clearly understood, the preferred embodiment thereof will now be described in detail by way of example, with reference to the accompanying drawings, in which:
Fig. 1 is an enlarged view of the of glass beads;
Fig. 2 is a cross-sectional view of a tire with the glass beads being injected inside of the tire;
Fig. 3 is a side view of a wheel assembly illustrating a heavy spot and the approximate location of the counterbalancing glass beads;
Fig. 4 is an application chart for the glass beads; and, Fig. 5 is an application chart (a continuation of Fig. 4) for the glass beads.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
The accompanying drawings illustrate the invention. With reference to Figure 1, the tire balancing beads are spherical in shape. The glass beads 1 are introduced into the hollow interior of the tire 2 by one of two methods. In the first method, a desired amount of glass beads may be poured into the tire well before the tire is mounted onto the wheel (not shown). The tire is then inflated after mounting. In the second method, as shown in Figure 2, a pre-mounted tire is deflated, and an in-line air filter container 3 is filled with the desired amount of the glass bead material. The in-line air filter container 3 is flipped upside down. The air intake end 4 is connected to a typical pressurized tire air supply. The air exit 5 is connected to the tire valve 6 connector. Valve 7 is opened thereby pressurizing the material housing. Valve 8 is subsequently opened . Approximately thirty seconds later the glass bead material is completely injected into the tire. The tire may then continue to be inflated to a desired tire pressure.
The application amount of the glass beads varies according to the size of the tire. The preferred amounts for the glass beads for various tire sizes are set in Figures 4 and 5. In general, for every thirteen pounds of tire, one ounce of glass beads should be introduced into the tire. A typical car tire will weigh about 30 pounds while a light truck tire will weigh 40 to 50 pounds and a medium truck tire will weigh about 90 to 130 pounds. When the tire is inflated and is set in motion the glass beads migrate within the tire so as to balance any imbalance in the tire. Unlike the prior art, the glass beads are smooth and have no sharp edges (as shown in Figure 1 ). Therefore, the glass beads are, advantageously, non-abrasive against the inside liner of the tire.
Moreover, the nature of the glass bead balancing material does not absorb moisture.
Advantageously, moisture clumping does not occur. The glass beads after installation and during the initial rotations of the tire will charge by tribo- or contact electrification during contact between the glass beads and the rubber of the tire. Because of the conductivity of the rubber any charge on the tire will be quickly dissipated.
However, because of the high surface resistivity of the glass beads, the charge will remain on the glass beads for long periods of time. The result is that the glass beads do not disengage from the lining whenever the tire stops motion because of the image force between the charge on the beads and an opposite charge induced in the rubber of the tire. The inventor has discovered that when the tire is dismounted the glass beads remain flush against the lining. When the installer strikes the tire or a sudden shock is felt by the tire then only will the glass beads disengage from the lining and fall free.
This overall clinging effect is referred to as 'electrostatic cling'.
For illustrative purposes Figure 3 shows a shaded heavy spot 20 and the approximate location of the glass beads 1 to counterbalance the imbalance in the wheel assembly. The heavy spot on the wheel assembly results in a centrifugal "G"
force which compresses the suspension springs of the vehicle creating an up and down bouncing effect (a vibration). This forces enough of the beads in the opposite direction of the heavy spot through inertia until they have counteracted the imbalance and the glass beads hold their position.
Advantageously, the glass beads do not react to any metal or alloyed metal wheel. Five thousands of an inch is the approximate desirable size of the glass beads. The inventor has discovered that this size allows for some wear that naturally occurs. The very good durability characteristics of the glass beads leads to little deterioration of the material into dust particles. This in turn reduces the possibility of the tire valve seat from clogging. Moreover, the present invention is environmentally friendly.
Additionally, the glass bead balancing material has shock absorbing characteristics. The inventor, has observed that with the glass bead material installed, the bumpy ride from a rough road or tight turns a noticeable reduction of vibration.
Silicone may be added to the glass beads as a lubricant. The amount of silicone lubricant added to the glass beads can be adjusted to vary the strength of the electrostatic cling effect. Specifically, 1 % is ideal for medium truck tires, 5% is ideal for passenger tires, and 3% is ideal for light truck tires.
It will be appreciated that the above description relates to the preferred embodiment by way of example only. Many variations on the invention will be obvious to those knowledgeable in the field, and such obvious variations are within the scope of the invention as described and claimed, whether or not expressly described.
For example, an alternative mixture having glass beads as one of its components is a possible. In addition, an alternative size for the glass beads may be used.
Moreover, the nature of the glass bead balancing material does not absorb moisture.
Advantageously, moisture clumping does not occur. The glass beads after installation and during the initial rotations of the tire will charge by tribo- or contact electrification during contact between the glass beads and the rubber of the tire. Because of the conductivity of the rubber any charge on the tire will be quickly dissipated.
However, because of the high surface resistivity of the glass beads, the charge will remain on the glass beads for long periods of time. The result is that the glass beads do not disengage from the lining whenever the tire stops motion because of the image force between the charge on the beads and an opposite charge induced in the rubber of the tire. The inventor has discovered that when the tire is dismounted the glass beads remain flush against the lining. When the installer strikes the tire or a sudden shock is felt by the tire then only will the glass beads disengage from the lining and fall free.
This overall clinging effect is referred to as 'electrostatic cling'.
For illustrative purposes Figure 3 shows a shaded heavy spot 20 and the approximate location of the glass beads 1 to counterbalance the imbalance in the wheel assembly. The heavy spot on the wheel assembly results in a centrifugal "G"
force which compresses the suspension springs of the vehicle creating an up and down bouncing effect (a vibration). This forces enough of the beads in the opposite direction of the heavy spot through inertia until they have counteracted the imbalance and the glass beads hold their position.
Advantageously, the glass beads do not react to any metal or alloyed metal wheel. Five thousands of an inch is the approximate desirable size of the glass beads. The inventor has discovered that this size allows for some wear that naturally occurs. The very good durability characteristics of the glass beads leads to little deterioration of the material into dust particles. This in turn reduces the possibility of the tire valve seat from clogging. Moreover, the present invention is environmentally friendly.
Additionally, the glass bead balancing material has shock absorbing characteristics. The inventor, has observed that with the glass bead material installed, the bumpy ride from a rough road or tight turns a noticeable reduction of vibration.
Silicone may be added to the glass beads as a lubricant. The amount of silicone lubricant added to the glass beads can be adjusted to vary the strength of the electrostatic cling effect. Specifically, 1 % is ideal for medium truck tires, 5% is ideal for passenger tires, and 3% is ideal for light truck tires.
It will be appreciated that the above description relates to the preferred embodiment by way of example only. Many variations on the invention will be obvious to those knowledgeable in the field, and such obvious variations are within the scope of the invention as described and claimed, whether or not expressly described.
For example, an alternative mixture having glass beads as one of its components is a possible. In addition, an alternative size for the glass beads may be used.
Claims (15)
1. A vehicle tire balancing material for injecting into the interior of a tire for correcting any imbalance therein, said balancing material consisting only of glass beads and up to about 1 % by volume of lubricant.
2. The balancing material as claimed in claim 1, wherein said lubricant is silicone.
3. The balancing material as claimed in any one of claims 1 to 2, wherein said glass beads are rounded in shape.
4. The balancing material as claimed in any one of claims 1 to 3, wherein said glass beads are primarily in the range between five to twenty-five thousands of an inch in diameter.
5. The balancing material as claimed in any one of claims 1 to 4, wherein the balancing material comprises:
(a) 99% of glass beads, and (b) 1% of silicone lubricant.
(a) 99% of glass beads, and (b) 1% of silicone lubricant.
6. A method of correcting the imbalance in a wheel assembly comprising the steps of:
(a) injecting a desired amount of a balancing material consisting of glass beads into the hollow interior of a stationary tire mounted to a wheel rim, (b) pressurizing the air in the tire to a desired level, and (c) setting the tire in motion, whereby the glass beads migrate within the interior of the tire and come to a stop on the lining of the tire at a position or positions so as to counterbalance the imbalance in the wheel assembly, and wherein a substantial portion of said glass beads remain at those positions by electrostatic cling.
(a) injecting a desired amount of a balancing material consisting of glass beads into the hollow interior of a stationary tire mounted to a wheel rim, (b) pressurizing the air in the tire to a desired level, and (c) setting the tire in motion, whereby the glass beads migrate within the interior of the tire and come to a stop on the lining of the tire at a position or positions so as to counterbalance the imbalance in the wheel assembly, and wherein a substantial portion of said glass beads remain at those positions by electrostatic cling.
7. The method as claimed in claim 8, wherein said balancing material further comprises a lubricant.
8. The method as claimed in claim 7, wherein said lubricant is silicone.
9. The method as claimed in any one of claims 7 to 8, wherein about 1% by volume of lubricant is used.
10. The method as claimed in any one of claims 6 to 9, wherein the desired amount of glass beads is approximately in the range of one ounce of beads for every thirteen pounds of weight of the tire.
11. A method of correcting the imbalance in a wheel assembly, said method comprising the steps of:
(a) introducing a predetermined amount of a balancing material consisting of glass beads into the tire well of an unmounted stationary tire, (b) mounting the tire, (c) pressurizing the air in the tire to a desired level, and (d) setting in motion the tire, whereby the glass beads migrate within the interior of the tire and come to a stop on the lining of the tire at a position or positions so as to counterbalance the imbalance in the wheel assembly.
(a) introducing a predetermined amount of a balancing material consisting of glass beads into the tire well of an unmounted stationary tire, (b) mounting the tire, (c) pressurizing the air in the tire to a desired level, and (d) setting in motion the tire, whereby the glass beads migrate within the interior of the tire and come to a stop on the lining of the tire at a position or positions so as to counterbalance the imbalance in the wheel assembly.
12. The method as claimed in claim 11, wherein said balancing material further comprises a lubricant.
13. The method as claimed in claim 12, wherein said lubricant is silicone.
14. The method as claimed in any one of claims 12 to 13, wherein about 1% by volume of lubricant is used.
15. The method claimed in any one of claims 11 to 14, wherein the desired amount of glass beads is approximately in the range of one ounce of beads for every thirteen pounds of tire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002216744A CA2216744C (en) | 1997-09-29 | 1997-09-29 | Tire balancing using glass beads |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002216744A CA2216744C (en) | 1997-09-29 | 1997-09-29 | Tire balancing using glass beads |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2216744A1 CA2216744A1 (en) | 1999-03-29 |
| CA2216744C true CA2216744C (en) | 2002-09-17 |
Family
ID=4161536
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002216744A Expired - Lifetime CA2216744C (en) | 1997-09-29 | 1997-09-29 | Tire balancing using glass beads |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2216744C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BR0017172B1 (en) * | 2000-03-13 | 2008-11-18 | balancing using coated beads. |
-
1997
- 1997-09-29 CA CA002216744A patent/CA2216744C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CA2216744A1 (en) | 1999-03-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKEX | Expiry |
Effective date: 20170929 |