US20130276946A1 - Irrigation Tire - Google Patents
Irrigation Tire Download PDFInfo
- Publication number
- US20130276946A1 US20130276946A1 US13/772,455 US201313772455A US2013276946A1 US 20130276946 A1 US20130276946 A1 US 20130276946A1 US 201313772455 A US201313772455 A US 201313772455A US 2013276946 A1 US2013276946 A1 US 2013276946A1
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- Prior art keywords
- tire
- longitudinal
- row
- lug
- tread
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Classifications
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- 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
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/0311—Patterns comprising tread lugs arranged parallel or oblique to the axis of rotation
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- 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
- B60C1/00—Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition
-
- 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
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/0304—Asymmetric patterns
-
- 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
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/0311—Patterns comprising tread lugs arranged parallel or oblique to the axis of rotation
- B60C11/0316—Patterns comprising tread lugs arranged parallel or oblique to the axis of rotation further characterised by the groove cross-section
-
- 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
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/032—Patterns comprising isolated recesses
-
- 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
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/0327—Tread patterns characterised by special properties of the tread pattern
- B60C11/033—Tread patterns characterised by special properties of the tread pattern by the void or net-to-gross ratios of the patterns
-
- 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
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/0327—Tread patterns characterised by special properties of the tread pattern
- B60C11/0332—Tread patterns characterised by special properties of the tread pattern by the footprint-ground contacting area of the tyre tread
-
- 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
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/13—Tread patterns characterised by the groove cross-section, e.g. for buttressing or preventing stone-trapping
- B60C11/1307—Tread patterns characterised by the groove cross-section, e.g. for buttressing or preventing stone-trapping with special features of the groove walls
-
- 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
- B60C13/00—Tyre sidewalls; Protecting, decorating, marking, or the like, thereof
-
- 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
- B60C3/00—Tyres characterised by the transverse section
- B60C3/04—Tyres characterised by the transverse section characterised by the relative dimensions of the section, e.g. low profile
-
- 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
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C2011/0337—Tread patterns characterised by particular design features of the pattern
- B60C2011/0386—Continuous ribs
- B60C2011/0388—Continuous ribs provided at the equatorial plane
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- 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
- B60C2200/00—Tyres specially adapted for particular applications
- B60C2200/08—Tyres specially adapted for particular applications for agricultural vehicles
Definitions
- the present invention relates generally to tires and to non-directional tires used in agricultural settings. More specifically, but without limitation, the present invention relates to non-directional pneumatic tires designed to support agricultural irrigation systems.
- Another area of conventional tire development is the “off-road” tire that is used on various “off-road” vehicles such as trucks, SUV's, and similar vehicles, where those “off-road” vehicles spend most of their time on paved surfaces and a smaller portion of their time on non-paved surfaces.
- most of these “off-road” tires have a specific direction of rotation designed into the “off-road” tire. This is due to the fact that these “off-road” vehicles have a preferred forward direction of movement, which corresponds into a specific preferred direction of rotation designed directly into the prior art “off-road” tires.
- This preferred direction of rotation for the tire leads to tire designs having characteristics, such as tread pattern, that cause the tire to specifically perform better when the tire is rotated in a specific direction. For example, the “off-road” tires perform significantly better when rotated in a forward direction with respect to the vehicle versus a backwards direction with respect to the vehicle.
- the prior art single directional tires also require different mounting techniques for each side of the vehicle. These multiple mounting techniques are normally necessitated by the fact that the tread of these single directional tires is designed to operate in a specific orientation with respect to the direction of travel of the vehicle. As such, these single directional tires must be properly oriented with respect to the wheel on which these tires are mounted and more specifically to the side of the wheel that is to be mounted on the vehicle.
- the field of agriculture is one area in which the apparatus, or vehicle, supported by wheels and tires can benefit from tires that are designed to traverse the ground with substantial similarity in both forward and backward directions (i.e., non-directional tires). Additionally, tires for agricultural apparatus normally are enhanced by a tread pattern that is specifically designed for use on non paved surfaces.
- a substantial portion of agricultural devices, such as tractors, trailers, crop planting devices, crop harvesting devices, and the like, are used in locations, such as agricultural fields, when it is undesirable for the agricultural device to substantially alter the ground upon which they move.
- Tires possessing non-directional capability can substantially improve the operation of the agricultural apparatus in the event the normal direction of travel is reversed. More importantly, tires so designed, can shorten the tire and wheel installation time required for the agricultural apparatus. This is due to the fact that a non-directional tire can reduce the need for multiple mounting techniques between the wheel and the apparatus. As such, a single mounting can be used for all of the wheel mounts regardless of their orientation with respect to the direction of travel of the apparatus. Additionally, the installation person would not be required to specifically align a non-directional tire with respect to the wheel used on an irrigation system, as would be required for a single directional tire.
- irrigation tires positioned on the irrigation system should be designed to move in either direction with similar ease, possess the proper dimensions to adequately support the weight of the irrigation system, including weight of the water supported by the irrigation system, and be designed to be light enough and have the proper tread pattern to refrain from, or minimally alter, the ground over which the irrigation system travels.
- an irrigation tire that is designed for movement in multiple rotational directions, is comprised of materials designed to have a minimal impact on the ground to which the irrigation system traverses, is comprised of materials to lengthen the useful life of the tire and withstand weathering by the elements, and is designed to facilitate improved traction with the ground upon which it travels. This needed tire is lacking in the art.
- a non-directional pneumatic tire having a diameter and a width sufficient to support an agricultural irrigation system.
- the tire is preferably used in conjunction with a wheel to support the agricultural irrigation system.
- the tire can further include a top layer and side walls, wherein the top layer and side walls define an interior chamber when positioned on the wheel.
- the interior chamber can be shaped to hold a gas, such as air, to facilitate the support of irrigation system.
- the tire can include an axis and a tread pattern positioned on the tire.
- the tread pattern includes a plurality of longitudinal protrusions positioned substantially parallel with the axis.
- the longitudinal protrusions preferably provide substantially the same coefficient of friction between the tire and the surface upon which the tire rotates when the tire is rotated in opposite directions with respect to the axis.
- the tread pattern can further include a circumferential protrusion positioned approximately at the mid point of the width of the tire.
- Each longitudinal protrusion can further include a terminal end that extends toward the mid-point of the width of the tire.
- the circumferential protrusion can space the terminal end of each longitudinal protrusion away from the axis of the tire. Additionally, the terminal end of each longitudinal protrusion can extend past the terminal end of adjacent longitudinal protrusions.
- the longitudinal protrusions have a circumferential spacing between adjacent longitudinal protrusions at the equatorial plane so that no portion of one longitudinal protrusion circumferentially coincides with another.
- the tire can be comprised of rubber, and can further include an anti-weathering agent.
- the anti-weathering agent can comprise at least 8 parts per 100 parts of the rubber of the total composition of the tire.
- Preferably the anti weathering agent can comprise between 8-18 parts per 100 parts of rubber.
- the anti weathering agent can comprise wax, an anti oxidant, resin, an anti ozonant or combinations thereof.
- the tire includes a raised tread pattern having a substantially centrally positioned circumferential lug and longitudinal lugs circumferentially positioned parallel to the axis of the tire.
- the longitudinal lugs preferably extend from the side walls of the tire towards the circumferential lug and include a terminal end positioned on the circumferential lug.
- the circumferential lug and terminal ends of the longitudinal lugs preferably provide a substantially uniform resistance between the tire and the surface upon which the tire rolls when the tire is rotated in opposite directions.
- the circumferential lug and longitudinal lugs can also be positioned to increase the crown strength of the tire and to increase the traction performance and cleaning ability of tire. Additionally, the tread design can be designed such that there is a reduced contact pressure between the tire and the surface upon which it traverses.
- the tire can include an anti weathering agent to increase the ozone resistance of the tire.
- the tire can include a tread durometer of less than 55 shore A hardness.
- FIG. 1 is a perspective view of a first embodiment of a tire made in accordance with the current disclosure.
- FIG. 2 is a perspective view of a second embodiment of a tire made in accordance with the current disclosure.
- FIG. 3 is a perspective view of a third embodiment of a tire made in accordance with the current disclosure.
- FIG. 4 is a perspective view of a fourth embodiment of a tire made in accordance with the current disclosure.
- FIG. 5 is a partial plan view of the tread of the tire shown in FIG. 2 .
- FIG. 6 is a cross sectional view of a tire made in accordance with the current disclosure showing the internal cavity formed between the side walls, top layer, and wheel.
- FIG. 7 is an elevation view of an example of an agricultural irrigation system supported by the current invention.
- FIG. 8 is a partial plan view, similar to FIG. 5 , of the tread of a tire made in accordance with the current disclosure.
- FIG. 9 is a partial plan view, similar to FIGS. 5 and 8 , of the tread of a tire made in accordance with the current disclosure.
- FIG. 10 is a partial cross-sectional view taken along lines 10 - 10 of FIG. 8 or 9 .
- FIG. 11 is a partial cross-sectional view taken along lines 11 - 11 of FIG. 8 or 9 .
- FIG. 12 is a partial cross-sectional view taken along lines 12 - 12 of FIG. 8 or 9 .
- FIG. 13 is a partial cross-sectional view taken along lines 13 - 13 of FIG. 8 or 9 .
- FIG. 14 is a partial cross-sectional view taken along lines 14 - 14 of FIG. 8 or 9 .
- FIG. 15 is a view similar to FIG. 2 showing another alternative tread design having a different shape enlarged head on the lugs.
- FIG. 16 is another view similar to FIG. 2 showing still another alternative tread design having a different shape enlarged head on the lugs.
- a tire is shown and generally designated by the numeral 10 .
- the tire 10 is preferably used to support an agricultural irrigation system 12 as the agricultural irrigation system 12 traverses across a surface 14 .
- the surface 14 is preferably a field in need of hydration.
- Tire 10 is a non-directional pneumatic tire having a diameter 16 and a width 18 sufficient to support the agricultural irrigation system 12 .
- the tire 10 is used in connection with a wheel 20 to support the agricultural system 12 on the surface 14 .
- the tire 10 includes a top layer or top wall 22 and side walls 24 and 26 that define an internal chamber 28 when the tire 10 is positioned on the wheel 20 .
- the internal chamber 28 can be shaped to hold a gas which can provide the pneumatic properties for the tire 10 .
- the tire 10 can include a rotational axis 30 and tread pattern 32 positioned on the tire 10 .
- the tread pattern 32 preferably includes a plurality of longitudinal protrusions 34 , which can be described as longitudinal lugs 34 , positioned substantially parallel to the axis 30 .
- the longitudinal protrusions 34 are positioned to provide substantially the same coefficient of friction between the tire 10 and the surface 14 when the tire 10 is rotated in opposite directions relative to the axis 30 . This can also be described as the tire 10 being a non-directional tire.
- the tread pattern 32 includes a circumferential protrusion 36 , which can also be described as a circumferential lug 36 , positioned approximately at the mid-point or equatorial plane 38 of the width 18 of the tire 10 .
- the circumferential protrusion 36 can space the longitudinal protrusions 34 away from the axis 30 .
- the longitudinal protrusions 34 can include a terminal end 40 which can be spaced by the circumferential protrusion 36 away from the axis 30 .
- the terminal end 40 of each longitudinal protrusion 34 extends towards and across the mid point or equatorial plane 38 of the tire 10 . This can best be seen in FIGS. 1-5 .
- the longitudinal protrusions 34 are arranged in first and second rows extending from the side walls 24 and 26 towards and across the mid point or equatorial plane 38 and terminating within the width of the circumferential protrusion 36 . Additionally, the terminal end 40 of each longitudinal protrusion 34 can extend past the terminal end 40 of adjacent longitudinal protrusions 34 of the opposing row.
- the longitudinal protrusions or lugs 34 of the first and second rows circumferentially alternate with each other.
- a circumferential spacing 37 such as shown in FIG. 5 between adjacent longitudinal protrusions of opposing rows at the equatorial plane 38 of the width of the tire.
- no portion of one longitudinal protrusion or lug 34 circumferentially coincides with or overlaps another adjacent longitudinal protrusion or lug 34 .
- FIG. 5 shows a plan view of a tire with a tread pattern made in accordance with the current disclosure.
- the dotted lines in FIG. 5 show the approximate location of the connection line in the tire 10 between the top layer 20 and sidewalls 24 and 26 .
- FIGS. 8 and 9 generally show a plan view of a tire with a tread pattern made in accordance with the current disclosure.
- FIG. 8 shows an example of the spacing of a tread pattern comprising 15 longitudinal protrusions per side of the tire (i.e. a pitch of 15) while
- FIG. 9 shows an example of the spacing of a tread pattern comprising 18 longitudinal protrusions per side of the tire (i.e. a pitch of 18).
- FIGS. 10-14 generally show partial cross-sectional views taken along various lines of FIG. 8 or 9 .
- FIGS. 10-12 show examples of the protrusion sides 50 having multiple taper sections extending between the outer and inner contact surfaces as previously described. The multiple slopes of these surfaces facilitate traction, increase crown strength, increase tire durability, and impediment cleaning ability for the tire 10 .
- the tread pattern 32 can include additional features to facilitate the performance of the tire.
- the longitudinal lugs 34 can include a recessed area 56 used to facilitate the traction of the tire 10 .
- intermediary lugs 58 can be positioned between the longitudinal lugs 34 . These intermediary lugs 58 can take a variety of shapes including a rib pattern as seen in FIG. 3 , a wavy pattern as seen in FIG. 4 , or other similar patterns used to increase the performance of the tire 10 .
- the protrusions 34 can also include tread bars 60 positioned substantially along the protrusion axis 44 of the longitudinal protrusions 34 .
- each longitudinal protrusion 34 can comprise various shapes.
- an end can be substantially round and be described as a rounded end 42 .
- This rounded end 42 can be positioned substantially along a protrusion axis 44 (see FIG. 5 ) for each longitudinal protrusion 34 .
- First and second bulges 46 and 48 which can also be described as circumferential enlargements 46 and 48 , can extend from the protrusion axis 44 , as best seen in FIGS. 2-5 , 8 and 9 . These bulges 46 and 48 can narrow to the rounded end 42 .
- the terminal end 40 of the longitudinal protrusions 34 can be described as being substantially spade shaped as exemplified in FIGS. 2-5 .
- FIG. 15 shows still another alternative shape of enlarged head which is similar to that of FIG. 5 but does not have the distinct circumferentially extending bulges 46 and 48 . Also in the design of FIG. 15 the longitudinal lugs 34 extend longitudinally to the edge of the circumferential lug 36 .
- FIG. 16 still another shape of the longitudinal lugs is shown.
- the lugs 34 have asymmetrically shaped enlarged heads with the heads of the first row facing circumferentially in opposite directions from the heads of the second row.
- these various shapes of the longitudinal protrusions 34 alone, and in combination with, the circumferential protrusion 36 facilitate increased traction performance of the tire 10 . Additionally, these protrusions 34 and 36 can enhance the cleaning ability of the tire and facilitate the contact of the tire 10 with the surface 14 . Additionally, the tread design, in combination with the protrusions 34 and 36 , facilitate and increases crown strength in the tire 10 .
- tread pitch of the tire is related to the tread pitch of the tire, the tread pitch being defined as the number of longitudinal lugs 34 in either one of the first and second rows.
- this tread pitch is in the range of from 10-25, and more preferably in the range of from 15-21.
- the tires of the present invention are preferably relatively large tires having an outside diameter 16 of at least about 40 inches and a tire section width 18 of at least about 10 inches.
- the large spacing between adjacent lugs 34 on these relatively large tires also results in a tread pattern having a relatively low rubber to void ratio, defined as the area of the radially outer surfaces of the lugs 34 , as compared to the total area across the tire width 18 .
- the rubber to void ratio over the tread width 18 is preferably less than about 20 percent, and more preferably in the range of from about 16 percent to about 20 percent.
- tire dimensions result in a tire 10 having an aspect ratio defined as the tire section height 17 (see FIG. 6 ) divided by the tire section width 18 of no greater than about 90 percent thereby providing a relatively wide tire.
- aspect ratio of each of those three tires is about 85 percent.
- the longitudinal protrusions 34 can include protrusion sides 50 extending from the contact surface 52 of each protrusion 34 down to lateral grooves 54 , which can be described as inner tread 54 . Additionally each protrusion side 50 can be sloped from the contact surface 52 down to a lateral groove 54 . The slope of each of the protrusion sides 50 can extend around and include a slope for the rounded end 42 and bulges 46 and 48 from the contact surface 52 to lateral grooves 54 . This can best be seen in FIGS. 2-5 , 8 , and 9 . The slope of these surfaces facilitates traction, increase crown strength, increase tire durability, and impediment cleaning ability for the tire 10 .
- the inner tread 54 which can be described as an inner contact surface 54
- the protrusion side 50 of each longitudinal protrusion 34 can include a first taper 62 extending from the contact surface 52 and a different sloped second taper surface 64 extending from the first taper surface 62 to the inner tread 54 .
- a third taper 65 can be positioned between the second taper surface 64 and the inner tread 54 .
- Each longitudinal protrusion 34 can be described as being positioned opposite the location of an inner tread 54 and circumferentially inside oppositely positioned adjacent longitudinal protrusions 34 .
- the first and second bulges 46 and 48 of adjacent longitudinal protrusions 34 i.e. first and second longitudinal protrusions 34 A and 34 B
- a longitudinal protrusion 34 C can be positioned opposite the chord length 66 such that the width 68 of the oppositely positioned longitudinal protrusion 34 C is less than the chord length 66 . This results in the circumferential spacing 37 between the enlarged heads of adjacent lugs 34 as shown in FIG. 5 .
- the tire 10 comprises rubber and an anti-weathering agent.
- the anti-weathering agent preferably comprises at least 8 parts per 100 parts of rubber in the composition of the tire 10 .
- the anti-weathering agent comprises between 8-18 parts per 100 parts of rubber.
- the anti-weathering agent can comprise elements such as wax, an anti oxidant, resin, an anti ozonant or combination thereof to provide ozone resistance and prolong the useful life of the tire 10 .
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Abstract
Description
- 1. Field of the Invention
- The present invention relates generally to tires and to non-directional tires used in agricultural settings. More specifically, but without limitation, the present invention relates to non-directional pneumatic tires designed to support agricultural irrigation systems.
- 2. Technical Background
- The development of specific tires to fill a specific need for various wheeled devices is well known in the art. Most of this focus has been directed at the development of tires for vehicles, such as automobiles, wherein those tires are designed to spend a great majority, if not all, of their useful life on paved surfaces.
- Another area of conventional tire development is the “off-road” tire that is used on various “off-road” vehicles such as trucks, SUV's, and similar vehicles, where those “off-road” vehicles spend most of their time on paved surfaces and a smaller portion of their time on non-paved surfaces. However, most of these “off-road” tires have a specific direction of rotation designed into the “off-road” tire. This is due to the fact that these “off-road” vehicles have a preferred forward direction of movement, which corresponds into a specific preferred direction of rotation designed directly into the prior art “off-road” tires. This preferred direction of rotation for the tire leads to tire designs having characteristics, such as tread pattern, that cause the tire to specifically perform better when the tire is rotated in a specific direction. For example, the “off-road” tires perform significantly better when rotated in a forward direction with respect to the vehicle versus a backwards direction with respect to the vehicle.
- These prior art tires have several drawbacks for vehicles that spend any significant amount of time moving in both forward and backward directions. For example, these prior art tires result in an uncomfortable and turbulent movement to the vehicle supported by those prior art tires when moved in a reverse direction. A majority of this turbulence is due to the specific tread pattern on these prior art tires and the orientation of the various elements, commonly referred to as lugs, on the tread pattern.
- Additionally, the prior art single directional tires also require different mounting techniques for each side of the vehicle. These multiple mounting techniques are normally necessitated by the fact that the tread of these single directional tires is designed to operate in a specific orientation with respect to the direction of travel of the vehicle. As such, these single directional tires must be properly oriented with respect to the wheel on which these tires are mounted and more specifically to the side of the wheel that is to be mounted on the vehicle.
- The field of agriculture is one area in which the apparatus, or vehicle, supported by wheels and tires can benefit from tires that are designed to traverse the ground with substantial similarity in both forward and backward directions (i.e., non-directional tires). Additionally, tires for agricultural apparatus normally are enhanced by a tread pattern that is specifically designed for use on non paved surfaces. A substantial portion of agricultural devices, such as tractors, trailers, crop planting devices, crop harvesting devices, and the like, are used in locations, such as agricultural fields, when it is undesirable for the agricultural device to substantially alter the ground upon which they move.
- One type of agricultural apparatus in particular that is normally positioned in an agricultural field, can benefit from non-directional tires, and preferably does not substantially damage or alter the ground upon which it moves is an irrigation system. Tires possessing non-directional capability can substantially improve the operation of the agricultural apparatus in the event the normal direction of travel is reversed. More importantly, tires so designed, can shorten the tire and wheel installation time required for the agricultural apparatus. This is due to the fact that a non-directional tire can reduce the need for multiple mounting techniques between the wheel and the apparatus. As such, a single mounting can be used for all of the wheel mounts regardless of their orientation with respect to the direction of travel of the apparatus. Additionally, the installation person would not be required to specifically align a non-directional tire with respect to the wheel used on an irrigation system, as would be required for a single directional tire.
- As such, irrigation tires positioned on the irrigation system should be designed to move in either direction with similar ease, possess the proper dimensions to adequately support the weight of the irrigation system, including weight of the water supported by the irrigation system, and be designed to be light enough and have the proper tread pattern to refrain from, or minimally alter, the ground over which the irrigation system travels.
- Most conventional irrigation tires, and most conventional agricultural tires, have a tread pattern that is specifically designed for a single preferred direction of rotation. Most of these conventional tires have lugs that angle towards the center part of the tire and are not parallel with the axis of the tire. Additionally, a majority of the irrigation tires are comprised of solid rubber that is molded to the wheel of the irrigation system. These types of tires can be very heavy and damage the ground upon which the irrigation system traverses. Also, these irrigation tires do not contemplate altering the composite of the tires to specifically protect the tires against the weathering elements to which the tires are exposed during their useful life.
- What is needed then is an irrigation tire that is designed for movement in multiple rotational directions, is comprised of materials designed to have a minimal impact on the ground to which the irrigation system traverses, is comprised of materials to lengthen the useful life of the tire and withstand weathering by the elements, and is designed to facilitate improved traction with the ground upon which it travels. This needed tire is lacking in the art.
- Included herein is a non-directional pneumatic tire having a diameter and a width sufficient to support an agricultural irrigation system. The tire is preferably used in conjunction with a wheel to support the agricultural irrigation system. The tire can further include a top layer and side walls, wherein the top layer and side walls define an interior chamber when positioned on the wheel. The interior chamber can be shaped to hold a gas, such as air, to facilitate the support of irrigation system.
- The tire can include an axis and a tread pattern positioned on the tire. The tread pattern includes a plurality of longitudinal protrusions positioned substantially parallel with the axis. The longitudinal protrusions preferably provide substantially the same coefficient of friction between the tire and the surface upon which the tire rotates when the tire is rotated in opposite directions with respect to the axis. The tread pattern can further include a circumferential protrusion positioned approximately at the mid point of the width of the tire.
- Each longitudinal protrusion can further include a terminal end that extends toward the mid-point of the width of the tire. The circumferential protrusion can space the terminal end of each longitudinal protrusion away from the axis of the tire. Additionally, the terminal end of each longitudinal protrusion can extend past the terminal end of adjacent longitudinal protrusions. The longitudinal protrusions have a circumferential spacing between adjacent longitudinal protrusions at the equatorial plane so that no portion of one longitudinal protrusion circumferentially coincides with another.
- The tire can be comprised of rubber, and can further include an anti-weathering agent. The anti-weathering agent can comprise at least 8 parts per 100 parts of the rubber of the total composition of the tire. Preferably the anti weathering agent can comprise between 8-18 parts per 100 parts of rubber. The anti weathering agent can comprise wax, an anti oxidant, resin, an anti ozonant or combinations thereof.
- Also included is a non directional pneumatic tire used to support an agricultural irrigation system. The tire includes a raised tread pattern having a substantially centrally positioned circumferential lug and longitudinal lugs circumferentially positioned parallel to the axis of the tire. The longitudinal lugs preferably extend from the side walls of the tire towards the circumferential lug and include a terminal end positioned on the circumferential lug. The circumferential lug and terminal ends of the longitudinal lugs preferably provide a substantially uniform resistance between the tire and the surface upon which the tire rolls when the tire is rotated in opposite directions.
- The circumferential lug and longitudinal lugs can also be positioned to increase the crown strength of the tire and to increase the traction performance and cleaning ability of tire. Additionally, the tread design can be designed such that there is a reduced contact pressure between the tire and the surface upon which it traverses.
- The tire can include an anti weathering agent to increase the ozone resistance of the tire. In addition the tire can include a tread durometer of less than 55 shore A hardness.
-
FIG. 1 is a perspective view of a first embodiment of a tire made in accordance with the current disclosure. -
FIG. 2 is a perspective view of a second embodiment of a tire made in accordance with the current disclosure. -
FIG. 3 is a perspective view of a third embodiment of a tire made in accordance with the current disclosure. -
FIG. 4 is a perspective view of a fourth embodiment of a tire made in accordance with the current disclosure. -
FIG. 5 is a partial plan view of the tread of the tire shown inFIG. 2 . -
FIG. 6 is a cross sectional view of a tire made in accordance with the current disclosure showing the internal cavity formed between the side walls, top layer, and wheel. -
FIG. 7 is an elevation view of an example of an agricultural irrigation system supported by the current invention. -
FIG. 8 is a partial plan view, similar toFIG. 5 , of the tread of a tire made in accordance with the current disclosure. -
FIG. 9 is a partial plan view, similar toFIGS. 5 and 8 , of the tread of a tire made in accordance with the current disclosure. -
FIG. 10 is a partial cross-sectional view taken along lines 10-10 ofFIG. 8 or 9. -
FIG. 11 is a partial cross-sectional view taken along lines 11-11 ofFIG. 8 or 9. -
FIG. 12 is a partial cross-sectional view taken along lines 12-12 ofFIG. 8 or 9. -
FIG. 13 is a partial cross-sectional view taken along lines 13-13 ofFIG. 8 or 9. -
FIG. 14 is a partial cross-sectional view taken along lines 14-14 ofFIG. 8 or 9. -
FIG. 15 is a view similar toFIG. 2 showing another alternative tread design having a different shape enlarged head on the lugs. -
FIG. 16 is another view similar toFIG. 2 showing still another alternative tread design having a different shape enlarged head on the lugs. - Referring generally to
FIGS. 1-16 , a tire is shown and generally designated by the numeral 10. Thetire 10 is preferably used to support anagricultural irrigation system 12 as theagricultural irrigation system 12 traverses across asurface 14. Thesurface 14 is preferably a field in need of hydration.Tire 10 is a non-directional pneumatic tire having adiameter 16 and awidth 18 sufficient to support theagricultural irrigation system 12. Thetire 10 is used in connection with awheel 20 to support theagricultural system 12 on thesurface 14. - Preferably the
tire 10 includes a top layer ortop wall 22 andside walls internal chamber 28 when thetire 10 is positioned on thewheel 20. Theinternal chamber 28 can be shaped to hold a gas which can provide the pneumatic properties for thetire 10. - The
tire 10 can include arotational axis 30 and treadpattern 32 positioned on thetire 10. Thetread pattern 32 preferably includes a plurality oflongitudinal protrusions 34, which can be described aslongitudinal lugs 34, positioned substantially parallel to theaxis 30. Preferably thelongitudinal protrusions 34 are positioned to provide substantially the same coefficient of friction between thetire 10 and thesurface 14 when thetire 10 is rotated in opposite directions relative to theaxis 30. This can also be described as thetire 10 being a non-directional tire. - Preferably, the
tread pattern 32 includes acircumferential protrusion 36, which can also be described as acircumferential lug 36, positioned approximately at the mid-point orequatorial plane 38 of thewidth 18 of thetire 10. Thecircumferential protrusion 36 can space thelongitudinal protrusions 34 away from theaxis 30. More specifically, thelongitudinal protrusions 34 can include aterminal end 40 which can be spaced by thecircumferential protrusion 36 away from theaxis 30. Theterminal end 40 of eachlongitudinal protrusion 34 extends towards and across the mid point orequatorial plane 38 of thetire 10. This can best be seen inFIGS. 1-5 . - The
longitudinal protrusions 34 are arranged in first and second rows extending from theside walls equatorial plane 38 and terminating within the width of thecircumferential protrusion 36. Additionally, theterminal end 40 of eachlongitudinal protrusion 34 can extend past theterminal end 40 of adjacentlongitudinal protrusions 34 of the opposing row. - As is apparent for example in
FIG. 5 , the longitudinal protrusions or lugs 34 of the first and second rows circumferentially alternate with each other. There is acircumferential spacing 37 such as shown inFIG. 5 between adjacent longitudinal protrusions of opposing rows at theequatorial plane 38 of the width of the tire. Thus due to thiscircumferential spacing 37 no portion of one longitudinal protrusion or lug 34 circumferentially coincides with or overlaps another adjacent longitudinal protrusion orlug 34. -
FIG. 5 shows a plan view of a tire with a tread pattern made in accordance with the current disclosure. The dotted lines inFIG. 5 show the approximate location of the connection line in thetire 10 between thetop layer 20 andsidewalls -
FIGS. 8 and 9 generally show a plan view of a tire with a tread pattern made in accordance with the current disclosure.FIG. 8 shows an example of the spacing of a tread pattern comprising 15 longitudinal protrusions per side of the tire (i.e. a pitch of 15) whileFIG. 9 shows an example of the spacing of a tread pattern comprising 18 longitudinal protrusions per side of the tire (i.e. a pitch of 18). -
FIGS. 10-14 generally show partial cross-sectional views taken along various lines ofFIG. 8 or 9.FIGS. 10-12 show examples of the protrusion sides 50 having multiple taper sections extending between the outer and inner contact surfaces as previously described. The multiple slopes of these surfaces facilitate traction, increase crown strength, increase tire durability, and impediment cleaning ability for thetire 10. - As seen in
FIGS. 3-4 , thetread pattern 32 can include additional features to facilitate the performance of the tire. For example, thelongitudinal lugs 34 can include a recessedarea 56 used to facilitate the traction of thetire 10. Additionally, intermediary lugs 58 can be positioned between thelongitudinal lugs 34. These intermediary lugs 58 can take a variety of shapes including a rib pattern as seen inFIG. 3 , a wavy pattern as seen inFIG. 4 , or other similar patterns used to increase the performance of thetire 10. - The
protrusions 34 can also include tread bars 60 positioned substantially along theprotrusion axis 44 of thelongitudinal protrusions 34. - The
terminal end 40 of eachlongitudinal protrusion 34 can comprise various shapes. For example as shown inFIG. 1 , an end can be substantially round and be described as arounded end 42. Thisrounded end 42 can be positioned substantially along a protrusion axis 44 (seeFIG. 5 ) for eachlongitudinal protrusion 34. First andsecond bulges circumferential enlargements protrusion axis 44, as best seen inFIGS. 2-5 , 8 and 9. Thesebulges rounded end 42. Alternately, theterminal end 40 of thelongitudinal protrusions 34 can be described as being substantially spade shaped as exemplified inFIGS. 2-5 . -
FIG. 15 shows still another alternative shape of enlarged head which is similar to that ofFIG. 5 but does not have the distinct circumferentially extendingbulges FIG. 15 thelongitudinal lugs 34 extend longitudinally to the edge of thecircumferential lug 36. - In
FIG. 16 still another shape of the longitudinal lugs is shown. InFIG. 16 , thelugs 34 have asymmetrically shaped enlarged heads with the heads of the first row facing circumferentially in opposite directions from the heads of the second row. - These various shapes of the
longitudinal protrusions 34 alone, and in combination with, thecircumferential protrusion 36 facilitate increased traction performance of thetire 10. Additionally, theseprotrusions tire 10 with thesurface 14. Additionally, the tread design, in combination with theprotrusions tire 10. - Representative dimensions for three proposed sizes of the
tire 10 utilizing the design shown inFIGS. 2 , 5, 8 and 9 are set forth in the following Table I. All dimensions are in inches. -
TABLE I 380/85D24 290/85D38 290/85D24 Champion Champion Champion Hydro ND Hydro ND Hydro ND Diameter 49.4 57.4 43.5 Section 12.7 9.7 9.7 Height Section 15.0 11.4 11.4 Width Lug Height 1.48 1.37 1.37 Tie-Bar 0.2 0.2 0.2 (Center Lug) Height Number of 18 21 16 Pitches - Additionally it is noted that there is a relatively wide spacing between the lugs of each row in the circumferential direction. This is related to the tread pitch of the tire, the tread pitch being defined as the number of
longitudinal lugs 34 in either one of the first and second rows. Preferably this tread pitch is in the range of from 10-25, and more preferably in the range of from 15-21. These low pitch tires having wide spaces therebetween provide increased cleaning effectiveness for use in very muddy environments encountered with irrigation tires. This is contrasted to designs having much higher pitches which might be utilized for example to provide more contact area for a tire operating under more traditional conditions. - Also, because of their use as irrigation tires, the tires of the present invention are preferably relatively large tires having an
outside diameter 16 of at least about 40 inches and atire section width 18 of at least about 10 inches. - The large spacing between
adjacent lugs 34 on these relatively large tires also results in a tread pattern having a relatively low rubber to void ratio, defined as the area of the radially outer surfaces of thelugs 34, as compared to the total area across thetire width 18. For the tires of the present invention such as represented inFIG. 5 and in Table I, the rubber to void ratio over thetread width 18 is preferably less than about 20 percent, and more preferably in the range of from about 16 percent to about 20 percent. - Furthermore, these tire dimensions result in a
tire 10 having an aspect ratio defined as the tire section height 17 (seeFIG. 6 ) divided by thetire section width 18 of no greater than about 90 percent thereby providing a relatively wide tire. As can be determined from the data of Table I, the aspect ratio of each of those three tires is about 85 percent. - The
longitudinal protrusions 34 can includeprotrusion sides 50 extending from thecontact surface 52 of eachprotrusion 34 down tolateral grooves 54, which can be described asinner tread 54. Additionally eachprotrusion side 50 can be sloped from thecontact surface 52 down to alateral groove 54. The slope of each of the protrusion sides 50 can extend around and include a slope for therounded end 42 and bulges 46 and 48 from thecontact surface 52 tolateral grooves 54. This can best be seen inFIGS. 2-5 , 8, and 9. The slope of these surfaces facilitates traction, increase crown strength, increase tire durability, and impediment cleaning ability for thetire 10. - For example, the
inner tread 54, which can be described as aninner contact surface 54, can be defined between the protrusion sides 50 of adjacentlongitudinal protrusions 34. As seen inFIGS. 10-12 theprotrusion side 50 of eachlongitudinal protrusion 34 can include afirst taper 62 extending from thecontact surface 52 and a different slopedsecond taper surface 64 extending from thefirst taper surface 62 to theinner tread 54. Athird taper 65 can be positioned between thesecond taper surface 64 and theinner tread 54. These multiple (dual, bi-, or otherwise) taperedlongitudinal protrusions 34 facilitate an increased durability in thetire 10 and treadpattern 32 by preventing cracking in thelongitudinal protrusions 34, especially near theinner tread 54. The dual taper edge also reduces the rubber volume required for the lugs. The dual slope of the protrusion sides 50 also facilitates improved traction and cleaning ability for thetire 10 through the movement of loose sections of theground surface 14 when the tire traverses thesurface 14. - Each
longitudinal protrusion 34 can be described as being positioned opposite the location of aninner tread 54 and circumferentially inside oppositely positioned adjacentlongitudinal protrusions 34. Alternately described, as indicated onFIG. 5 , the first andsecond bulges longitudinal protrusions chord length 66 between the adjacentlongitudinal protrusions longitudinal protrusion 34C can be positioned opposite thechord length 66 such that thewidth 68 of the oppositely positionedlongitudinal protrusion 34C is less than thechord length 66. This results in thecircumferential spacing 37 between the enlarged heads ofadjacent lugs 34 as shown inFIG. 5 . - In a preferred embodiment, the
tire 10 comprises rubber and an anti-weathering agent. The anti-weathering agent preferably comprises at least 8 parts per 100 parts of rubber in the composition of thetire 10. In a more preferred embodiment, the anti-weathering agent comprises between 8-18 parts per 100 parts of rubber. The anti-weathering agent can comprise elements such as wax, an anti oxidant, resin, an anti ozonant or combination thereof to provide ozone resistance and prolong the useful life of thetire 10. - Thus, although there have been described particular embodiments of the present invention of a new and useful Irrigation Tire, it is not intended that such references be construed as limitations upon the scope of this invention except as set forth in the following claims.
Claims (20)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US13/772,455 US20130276946A1 (en) | 2007-10-01 | 2013-02-21 | Irrigation Tire |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/865,085 US9108469B2 (en) | 2007-10-01 | 2007-10-01 | Irrigation tire |
US13/772,455 US20130276946A1 (en) | 2007-10-01 | 2013-02-21 | Irrigation Tire |
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US11/865,085 Continuation US9108469B2 (en) | 2007-10-01 | 2007-10-01 | Irrigation tire |
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US13/772,455 Abandoned US20130276946A1 (en) | 2007-10-01 | 2013-02-21 | Irrigation Tire |
US14/822,954 Active 2029-06-20 US10272724B2 (en) | 2007-10-01 | 2015-08-11 | Irrigation tire |
US15/189,258 Active US9649886B2 (en) | 2007-10-01 | 2016-06-22 | Irrigation tire |
US15/460,261 Active US9873291B2 (en) | 2007-10-01 | 2017-03-16 | Irrigation tire |
US16/249,984 Abandoned US20190202243A1 (en) | 2007-10-01 | 2019-01-17 | Irrigation Tire |
US17/978,283 Abandoned US20230050820A1 (en) | 2007-10-01 | 2022-11-01 | Irrigation tire |
US17/978,285 Pending US20230046498A1 (en) | 2007-10-01 | 2022-11-01 | Irrigation tire |
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US11/865,085 Active 2029-07-08 US9108469B2 (en) | 2007-10-01 | 2007-10-01 | Irrigation tire |
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Application Number | Title | Priority Date | Filing Date |
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US14/822,954 Active 2029-06-20 US10272724B2 (en) | 2007-10-01 | 2015-08-11 | Irrigation tire |
US15/189,258 Active US9649886B2 (en) | 2007-10-01 | 2016-06-22 | Irrigation tire |
US15/460,261 Active US9873291B2 (en) | 2007-10-01 | 2017-03-16 | Irrigation tire |
US16/249,984 Abandoned US20190202243A1 (en) | 2007-10-01 | 2019-01-17 | Irrigation Tire |
US17/978,283 Abandoned US20230050820A1 (en) | 2007-10-01 | 2022-11-01 | Irrigation tire |
US17/978,285 Pending US20230046498A1 (en) | 2007-10-01 | 2022-11-01 | Irrigation tire |
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EP (1) | EP2205453A4 (en) |
CN (2) | CN101868361A (en) |
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US20090084478A1 (en) * | 2007-10-01 | 2009-04-02 | Wallet Bill J | Irrigation tire |
CN105774414A (en) * | 2016-03-28 | 2016-07-20 | 柳州龙辉科技有限公司 | Agricultural tire |
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2008
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- 2008-09-30 MX MX2010003590A patent/MX349613B/en active IP Right Grant
- 2008-09-30 EP EP08835176.2A patent/EP2205453A4/en not_active Withdrawn
- 2008-09-30 CN CN200880116341A patent/CN101868361A/en active Pending
- 2008-09-30 BR BRPI0817939-5A patent/BRPI0817939B1/en active IP Right Grant
- 2008-09-30 CN CN201410398330.0A patent/CN104175809B/en active Active
- 2008-09-30 AU AU2008307581A patent/AU2008307581B2/en not_active Ceased
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2010
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2013
- 2013-02-21 US US13/772,455 patent/US20130276946A1/en not_active Abandoned
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2015
- 2015-08-11 US US14/822,954 patent/US10272724B2/en active Active
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2016
- 2016-06-22 US US15/189,258 patent/US9649886B2/en active Active
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2017
- 2017-03-16 US US15/460,261 patent/US9873291B2/en active Active
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2019
- 2019-01-17 US US16/249,984 patent/US20190202243A1/en not_active Abandoned
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2022
- 2022-11-01 US US17/978,283 patent/US20230050820A1/en not_active Abandoned
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Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
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US20090084478A1 (en) * | 2007-10-01 | 2009-04-02 | Wallet Bill J | Irrigation tire |
US9108469B2 (en) * | 2007-10-01 | 2015-08-18 | Bridgestone Americas Tire Operations, Llc | Irrigation tire |
US9649886B2 (en) * | 2007-10-01 | 2017-05-16 | Bridgestone Americas Tire Operations, Llc | Irrigation tire |
US9873291B2 (en) | 2007-10-01 | 2018-01-23 | Bridgestone Americas Tire Operations, Llc | Irrigation tire |
US10272724B2 (en) | 2007-10-01 | 2019-04-30 | Bridgestone Americas Tire Operations, Llc | Irrigation tire |
CN106163831A (en) * | 2014-04-13 | 2016-11-23 | 普利司通美国轮胎运营有限责任公司 | The tire being characterized with curved stripes |
CN105774414A (en) * | 2016-03-28 | 2016-07-20 | 柳州龙辉科技有限公司 | Agricultural tire |
EP3475104A4 (en) * | 2016-06-24 | 2020-03-11 | Koofy Innovation Limited | Single wheel self-balancing vehicle with tire permitting carving motion |
Also Published As
Publication number | Publication date |
---|---|
US20190202243A1 (en) | 2019-07-04 |
US20090084478A1 (en) | 2009-04-02 |
WO2009045391A3 (en) | 2009-07-30 |
MX349613B (en) | 2017-08-04 |
US20230050820A1 (en) | 2023-02-16 |
CN101868361A (en) | 2010-10-20 |
BRPI0817939A2 (en) | 2015-04-07 |
ZA201002232B (en) | 2011-11-30 |
WO2009045391A9 (en) | 2010-02-11 |
US20170182848A1 (en) | 2017-06-29 |
US20160303917A1 (en) | 2016-10-20 |
CN104175809A (en) | 2014-12-03 |
MX2010003590A (en) | 2010-10-25 |
US10272724B2 (en) | 2019-04-30 |
US9108469B2 (en) | 2015-08-18 |
US20230046498A1 (en) | 2023-02-16 |
CN104175809B (en) | 2017-07-14 |
BRPI0817939B1 (en) | 2020-03-03 |
US9873291B2 (en) | 2018-01-23 |
US9649886B2 (en) | 2017-05-16 |
EP2205453A2 (en) | 2010-07-14 |
AU2008307581B2 (en) | 2012-09-06 |
AU2008307581A8 (en) | 2010-05-13 |
US20160185157A1 (en) | 2016-06-30 |
EP2205453A4 (en) | 2013-07-31 |
AU2008307581A1 (en) | 2009-04-09 |
WO2009045391A2 (en) | 2009-04-09 |
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