CN1714007A

CN1714007A - Low pressure tire

Info

Publication number: CN1714007A
Application number: CN02830051.3A
Authority: CN
Inventors: W·E·塔格尔
Original assignee: Wetsco Inc
Current assignee: Wetsco Inc
Priority date: 2002-10-18
Filing date: 2002-10-18
Publication date: 2005-12-28
Also published as: WO2004037565A1

Abstract

A low pressure tire includes a torus of flexible, substantially inelastic material. The material will not deform at a temperature of about 225 DEG F. The torus includes an inner diameter surface for engaging a tire supporting rim and an outer diameter surface for contacting a support surface. The torus can flatten under a load to facilitate movement of the tire over soft or irregular support surfaces. A sealable opening permits the inflation and deflation of the torus, and includes a valve stem housing and a valve stem having a plurality of barbs, which taper inwardly in the direction of the valve stem housing.

Description

Low pressure tire

Technical field

The present invention relates to be used for the wheel of the land vehicle that on hard, soft, level and smooth, fitfull and/or other surface, moves.The invention still further relates to the land vehicle that comprises this tire.The invention still further relates to tire and the wheel combined body that comprises tire.In addition, the present invention relates to be used for the method for mobile land vehicle and be used to make method according to tire of the present invention.

Background technology

In decades, provide the land vehicle and the aircraft that are provided with wheel, wheel comprises wheel rim and the air-inflation tyre that is installed on the wheel rim.Because this wheel in use has quite high cireular frequency and have the danger that wheel breaks owing to run into obstacle in its road, the housing of the tire of prior art is provided with almost evenly by natural or synthetic material or metal or the fabric that both make or the stiffener of rope form extension.

In this airtyred application the earliest, tire comprises that one has the reinforcement carcass of U-shaped cross-sectional profile, and this reinforced tire carcass is provided with the outer circular edge that engages wheel rim.Pipe is positioned at tire carcass in the annular arrangement, engages with tire carcass and wheel rim external diameter.In widely used this wheel still, at work, wheel rim and tire carcass provide necessary mechanical strength, and pipe provides essential airtight interior.Recently, tubeless tyre has obtained generally using, and wherein tire carcass directly is sealed in wheel rim so that the air tight inner space to be provided, and so no longer needs interior pipe.

In order to guarantee suitable load-carrying capacity, this prior art tire is remained on their wheel rim and guarantees that this wheel can bear to driving and brake the torque that this vehicle applies, tire carcass normally quite rigidity and than they interior pipe otherwise much flexible.Cast and no cast inflation of tire are arrived quite high operating pressure, surpass 25 pounds per square inch usually.When the wheel of this prior art was installed on the vehicle and is subjected to load on axle journals, tyre collapse got seldom, is keeping the outer shape that is quite analogous to unaerated, does not load wheel profile usually.

This prior art wheel is suitable on the vehicle that travels on quite hard, the smooth area supported very much.But if vehicle runs into soft surfaces or the irregular surface such as many rocky terrains such as the sandy beach, the performance of the wheel of prior art is normally not quite gratifying so.Especially, the prior art tire and below support surface between mating surfaces be so little, so that below the pressure of per unit area on the support surface high, often cause the wheel of vehicle to be absorbed at least in part in the soft support surface such as the sandy beach.On irregular surface, the performance quite hard, that can not flatten of this prior art tire carcass and their high inflation pressure are difficult to make tire to submit to obstacle in its road, so that vehicle can not apply minimum power ground to overtake.In some cases, because the big mating surfaces of broad track formula tire, in self dynamic vehicle, use the broad track formula tire of big costliness, so that they travel on soft and fitfull surface.

Developed the many means of deliverys or the vehicle that are used to travel on soft or irregular surface in recent years, they are manual operations usually, but also handles by self dynamic trac..For example, the U.S. Patent number 4,327,933 about " Sailboat Carrier (sailing boat car) " of authorizing W.E.Tuggle has disclosed a kind of means of delivery, and it is suitable for mobile sailcatamaran and crosses the broad regions at sandy beach and enter in the water.Though the small wheels of prior art type discussed above can be used on this transportation means, still require sizable effort to move cargo-carring means of delivery and cross the sandy beach.

Recently, the inventor has developed a kind of wheel, it has very big mating surfaces, so that in soft surfaces, be absorbed in minimum, and have better elastomeric and flexible tire body, when travelling the obstacle of tire in rolling across its road, the two can more easily be out of shape and make the area of contact of tire under loading, to increase very significantly.Especially, provide a kind of low pressure tire, it comprises the torus of flexible essentially no elastomeric material, and this material can not be out of shape in about 225 temperature.This torus comprises the inside diameter surface and the external diameter surface that is used to contact support surface that is used to engage the tire support rim.This torus can be crushed under loading, so that tire travels on soft or fitfull support surface.This tire also comprises sealable hole, is used for inflation of tire and venting.See the US Patent 6,279,631 of authorizing Tuggle, the disclosure of this patent is incorporated herein by reference.

In the process of making this tire, during molded polyurethane or any other similar plastics, in mould, place valve rod, and when moulding of tyres, in its molded valve stem socket that centers on.

But find, when to this tire pump gas, between valve stem socket and valve rod, may leak.

Therefore, hope prevents or the remarkable basically escape of air that reduces from this tire.

Summary of the invention

The present invention relates to address the leakage concern.Especially, more employed method had reduced labour intensity significantly than in the past to make the method for tire of the present invention.

Especially, the present invention relates to low pressure tire, comprising the basic inelastic material of flexibility, and this material can not be out of shape under the temperature about 225.This torus comprises the inside diameter surface and the external diameter surface that is used to contact support surface that is used to engage the tire support rim.This torus can be crushed under loading, so that this tire moves on soft or irregular surface.This tire also comprises sealable hole, is used for torus is put on the air and exits, and wherein this hole comprises valve rod housing and the valve rod with many barbs, and described barb is towards the outside tapering of the direction of valve rod housing.

In addition, the present invention includes tire and wheel combined body, wherein tire is basically as previously discussed.Wheel comprises the tire support rim that a cylindrical central portion with the inside diameter surface that is used to engage tire is divided.A pair of support flange extends axially from the opposition side of this core, is used for engaging when tire flattens under loading tire.

And, the present invention includes wheel vehicle, this vehicle comprise vehicle frame, at least one as previously discussed tire, at least one as previously discussed the tire support rim and interconnect described at least one wheel rim and vehicle frame so that described at least one wheel rim and the rotary at least one axle of described at least one tire.

And, the present invention includes the method that is used for mobile land vehicle, it comprises provides such as above-described vehicle.This vehicle moves crosses support surface, and vehicle is supported at least one tire simultaneously.

The present invention also comprises the method for making tire.This method comprises the torus blown-moulding flexibility, essentially no elastomeric material, and wherein this material can not be out of shape under about 225 temperature, and comprises pin in this mould.This torus comprises the inside diameter surface and the external diameter surface that is used to contact support surface that is used in conjunction with the tire support rim.This torus can be crushed under loading, so that tire moves on soft or fitfull support surface.

Open mould and take out the internal diameter that pin produces valve stem socket or housing.Valve rod is inserted in the socket, and wherein valve rod has the external diameter bigger than the internal diameter of valve stem socket, and has many barbs, and these barbs are towards the outside tapering of the direction of valve stem socket.

Be described in detail from following, other purpose of the present invention and advantage will become more obvious for those skilled persons in this field.In following being described in detail, think to carry out best way of the present invention by illustrating simply, only illustrate and narrated preferred embodiment of the present invention.As you will understand, the present invention that other can be arranged with different embodiment, without departing from the invention, its many details can be modified in many aspects.Therefore, accompanying drawings and description should be considered to exemplary in nature, rather than restrictive.

The accompanying drawing summary

Fig. 1 shows the cutaway view according to wheel embodiment of the present invention, and it shows the profile that obviously is crushed that tire presented of torus shape when load is put on this assembly; And

Fig. 2 shows the lateral plan of wheel embodiment shown in Figure 1.

Fig. 3 a is the cutaway view according to valve rod of the present invention.

Fig. 3 b is the cutaway view of valve stem socket.

The specific embodiment

Recognize to need the tire that can on soft and fitfull surface, travel, must recognize that also the surface that common needs cross more than one type travels.And, have other surface of particular requirement.In addition, there be load and the vehicle that requires special processing.Need the tire and/or the wheel that can address all of these issues.And, a kind of like this tire need be provided, wherein make escape of air reduce to minimum.

According to the present invention, shown in Fig. 3 a and 3b, by using a kind of problem that is used for a sealable hole of torus inflation and venting has been solved escape of air, this hole comprises valve rod housing 110 and valve rod 120.

Valve rod has many barbs 130, and they are from the outside tapering of valve rod.The internal diameter of the valve rod housing 110 of tire is wished as much as possible little, but can not produce undue strain at the material that is used for making the valve rod housing, and it is less than the maximum outside diameter of valve rod 120.The internal diameter of the valve rod housing 110 of tire can be less than half of maximum outside diameter of valve rod barb 120, and it depends on employed tire material, be at least about usually valve rod 120 maximum outside diameter 50%.Valve rod generally includes at least three barbs, more generally at least four barbs.The maximum gauge of barb is usually at least about 10 millimeters.Usually separate about 5 millimeters between all barbs.The normally about 10 millimeters length with it of the diameter of valve rod 120 are about 20 millimeters.The wall thickness of valve rod 120 is usually at least about 2 millimeters.

Can make valve rod 120 by plastics or metal.By flexibility, on the base inelastic material manufacture according to tire of the present invention.In other words, though if it is applied this material of power can be out of shape, it can not extend or seldom extend when it is applied power.This is different with material such as rubber or rubber type of material, and these materials can be out of shape and be very resilient and can extend.

Advantage according to the tire of material manufacture of the present invention comprises that tire can be used on all types of surfaces, no matter be hard or soft, rule or random, and has any other landform.For example, inflatable to big pressure according to tire of the present invention for being used on the rigid surface.

According to these aspects, the advantage of tire material of the present invention is that it can be used on the hard surface, and can not engage or press this surface as hard tire.For example, can be with on the surface that is used in according to tire of the present invention such as light foam core aluminum (the light foam core alumium) floor of using in airplane industry, and can as conventional wheel, not press this floor.Usually need cross floor and bear heavier load.For example, load galley equipment and unload galley equipment from aircraft.In the bigger aircraft such as 747, galley equipment can weigh 1200 pounds.

Make the floor indentation or produce fine wrinkle owing to be used on the floor all conventional wheels of transportation galley equipment or other heavy lift, spend several thousand dollars of repairings, by some individuals, reach ten people in some cases and carry galley equipment and heavy lift.Adopt the present invention, by two people same article are rolled on floor, and not damage the floor.Obviously, promote so heavy load and may cause that the back is injured, cause the expenditure of medical treatment and labour power loss and increase premium rate.The present invention can help to reduce these expenses.

And,, bear heavy lift with the surface that allows to cross these sensitivities because its flexibility can be inflated fully according to tire of the present invention.A remarkable advantage of the present invention is the surface modulation gas charging degree that can must move thereon according to just sustained weight and it, with obtaining best performance.Therefore, the present invention can provide the remarkable preceence that surmounts present employed tire.

Unlike according to tire of the present invention,, then will stretch and the increase diameter towards side direction simply if the rubber tire that fabric of no use or rope are strengthened is applied in bigger inflation when carrying heavier load.In other words, the tire of more resilient material manufacture since it elasticity in addition may not bear heavier load.Can this thing happens according to tire of the present invention.

According to these aspects, can side direction do not stretch so manyly according to tire of the present invention, can as more flexible material is contingent, not clip the structure of the vehicle that tire transports.Because its inelastic character also can not extend to the degree that it can rub according to tire of the present invention on the inboard of the york piece of supporting the wheel that tire is mounted thereto.If tire is supported go-cart and is further inflated, is used for to bear heavier load on soft area or be used as hard tire on rigid surface that the inelastic character of tire can also prevent that tire from increasing diameter and clipping the go-cart hopper.Be used for to help also to prevent that according to the material of tire of the present invention nonelastic tire from clipping other part of the vehicle that tire wherein is installed.

Owing to made by essentially no elastomeric material according to tire of the present invention, it can be inflated until hard, and does not stretch, so that it can be used in the application scenario of the traditional hard wheel of common use.On the other hand, can also be deflated, on softer and fitfull support surface, to use according to tire of the present invention.

Because according to the performance of tire of the present invention, it not only can be used for such as on the soft surfaces of earth, sand etc. and uneven surface, so and do not have elastic dilatation also can be used on the hard surface owing to this tire can be inflated.Owing to made by flexible material according to tire of the present invention, they can be used in the occasion of transporting the sensitive equipment such as electronic machine, and the material of tire will absorb impact this moment, help avoid collision and damage responsive material.

An example that can be used for according to the material of tire of the present invention is a polyurethane.Polyurethane can be thermoplastic.In addition, polyurethane can be the polyurethane of polyether-based grade.An example of the polyurethane of a thermoplastic poly ether grade is the TEXIN 985U polyurethane that can obtain from Bayer company used according to the present invention.This polyurethane has about 86A Shore hardness.Also can use and have similar characteristics other polyurethane or other material of (such as Shore hardness, friction drag, strength under shock, toughness, flexibility and/or be exposed to the ultraviolet resistivity).

Wall thickness according to tire of the present invention can change greatly along with diameter and/or width, weight loading and the application scenario of tire.One embodiment of the invention are used about ten inches high, about four inches wide tires, are used for that golfbag is pulled a cart and go-cart.Estimate this take turns the maximum weight that requires to bear be about 75 pounds.The wall thickness of this embodiment can hang down to about 3/32 inch.

According to another embodiment, the wheel of same size can be used on the hand barrow.But this embodiment will comprise the wall thickness about 1/8 inch.For bigger tire, for example about 19.3 inches high, about 9 inches wide, according to load and application scenario, wall thickness can be about 1/4 inch.

According to the character of molding process, usually, tire has homogeneous thickness around its whole wall.But tire can have different wall thickness.

Also other material that can use tire can have or similar performance identical with pu tire is such as many plastics.These performances can comprise elasticity, flexibility, temperature tolerance characteristic, chemical composition etc.

Another advantage according to tire of the present invention is that it can be used under the extreme temperature.For example, tire, can be used on hot concrete, the pitch as the tire of polyurethane manufacturing, or under solar light irradiation awfully hot vehicle interior, wherein temperature can surpass 225 °F, and can not be out of shape.Many plastics tyres are being restricted aspect their operable conditions.For example, the elastomer plastic tire begins distortion at about 120 °F to about 150 temperature.Because cement concrete, pitch, metal and other surface can surpass 120 °F in summer, so these tires can not be used on these surfaces.And the inside of power actuated vehicle may be above about 225 °F in summer.Elastomer plastic type tire can be out of shape under these conditions.Because above situation, with known tire, as the tire of the material manufacture that disclosed in the U.S. Patent number of announcing the 3 days September in 1985 of authorizing W.E.Tuggle 4,538,657 relatively, the present invention can be used for the application scenario of greater number.

Generally include torus flexible, essentially no elastomeric material according to low pressure tire of the present invention.As previously discussed, material can be polyurethane or similar polyurethane material.Fig. 2 shows the embodiment according to tire of the present invention.

According to the material of low pressure tire of the present invention until or surpass under 225 the temperature and can not be out of shape.Shown in the embodiment, torus comprises the inside diameter surface 52 that is used to engage tire support rim 12, as shown in Figure 1 as illustrated in fig. 1 and 2.Below will be described in detail tire support rim 12.Torus also comprises the external diameter surface 56 that is used to contact support surface.

Make toric material torus can be crushed under loading, so that tire moves on soft or fitfull support surface.As discussed above, this tire can also move on hard support surface.Also comprise sealable hole according to low pressure tire of the present invention, be used for torus inflation and venting.

The external diameter surface of contact support surface does not have the fabric or the rope of reinforcement usually at least basically.But, this reinforcement material 60 can be in tire support rim 12 near, be used in tire engages the zone of wheel rim, providing additional strength.However, need not comprise this reinforcement material according to tire of the present invention at any position.Can help to flatten as required or be out of shape without any reinforcement fabric or rope according to tire of the present invention.

As previously discussed, make when flexible inelastic materials according to tire of the present invention runs into obstacle under loading and be out of shape usually, but do not stretch.When being inflated to less degree, tire can spread out under loading, so that move on soft or fitfull support surface.Usually, under these states, can be inflated to according to tire of the present invention and to be not more than approximately about per square inch 10 pounds pressure, to help guaranteeing that tire can be crushed, be used for helping to provide sufficient mating surfaces, to reduce the friction of rolling between tire and soft or fitfull support surface.Thereby the vehicle that this tire can allow to be correlated with is easy to move on soft or fitfull support surface.Along with the increase of the load on tire, the mating surfaces of tire also can increase.

Though can be crushed for being inflated to the about 10 pounds tire that is not more than per square inch, when moving on soft and/or fitfull support surface, lower pressure also is available.In fact, pressure is low is suitable to about 1 pound/sq in to about 2 pounds/sq in proof for many application scenarios.Any support surface, no matter soft, hard, regular or irregular, usually all by toric external diameter surface direct contact.Usually, when being inflated to low pressure, tire will have the characteristic such as flexibility, and will be crooked under loading to allow tire, be crushed at least partly from its profile of not stand under load, and along with the increase of load is crushed continuing.Thereby, according to tire of the present invention provide it external diameter and below the area of contact of increase between the soft or irregular surface.But this is a condition with the relatively inelastic character according to material of the present invention.

Be low to moderate the pressure of about 1 pound/sq in though tire can be inflated to, can also be inflated to the pressure of about 10 pounds/sq in according to tire of the present invention to about 2 pounds/sq in.Being inflated to bigger pressure allows to use on harder support surface according to tire of the present invention.As discussed above, because the structure of valve rod 1 of the present invention and valve rod housing, any escape of air of tire of the present invention is reduced to minimum degree as much as possible.

For a certain inflation pressure, the size of the contact zone between tire and support surface has a limit value.This limit value is the only about half of of toric circumference.By flattening, can reduce friction of rolling according to tire of the present invention.Because same cause, when tire runs into obstacle and roll on obstacle, tire will be crooked under loading.Thereby, reduced and beated.

In the embodiment shown in Fig. 1 and 2, can also comprise the

flange

30 and 32 that extends radially outwardly according to tire of the present invention.Flange can help tire to engage with wheel, more is described in detail as following.This can help to guarantee that tire is not with respect to wheel movement.

Usually, be blown-mold according to tire of the present invention.Can be installed on the wheel rim according to tire of the present invention.Therefore, the present invention also comprises the tyre and rim fabricate block.Comprise as previously discussed tire according to tyre and rim fabricate block of the present invention.

Tire and wheel combined body also comprise the tire support rim.The tire support rim generally includes the cylindrical central portion branch of the inside diameter surface 52 that is used to engage tire.A pair of

support flange

30 and 32 opposition sides from the core of wheel rim extend axially, and are used to be bonded on the tire that flattens under the loading.

Can comprise single single piece according to wheel of the present invention.Perhaps, wheel can comprise the more than one part of the formation wheel that interconnects.For example, rim for automobile wheel can comprise two axially extended

half ones

14 and 16 that separate.Two and half ones can interconnect, to form whole wheel.Can link together by two and half ones of any suitable fastener wheel.The example that can be used to the fastener of two and half ones that connect comprises that as with 46 bolt and the nuts that indicate together, this bolt extends through

cylindrical shape part

18 and 20.

The embodiment that comprises the wheel of two and half ones is particularly useful for the occasion that tire comprises the flange 58 that extends internally.When half one of wheel assembles, the flange of tire can be clipped between two and half ones.Two and half ones can be tightened together then.

No matter whether comprise two or more parts or single part according to wheel of the present invention, the core of wheel can be admitted an axle by its extension.For this reason, a centre hole perhaps is

centre hole

24 and 26 comprising under the tire situation of two and half ones, among the embodiment as illustrated in fig. 1 and 2, can be set in the wheel or in each wheel half one, is used for admitting axle 28.

Wheel can rotate about the axle.Perhaps, if the core of wheel is admitted an axle, this axle and wheel can rotate together so.According to this embodiment, axle and wheel can link together, or are bonded with each other with other method, so that they rotate together.

Axle can also comprise from axially extended two shaft portions of the opposition side of wheel.Usually, axle and wheel rotate together in such an embodiment.

Wheel rim according to wheel of the present invention can comprise one or more sleeves and/or one or more ball-bearing casing.Sleeve and/or ball-bearing casing can help to make things convenient for the rotation of wheel and/or axle.

If wheel comprises two parts, they can be essentially identical half ones.This half one can comprise cylindrical external surface basically 22 with band diameter D and 24 center circle tubular part 18 and 20.No matter whether tire comprises two and half ones, and the cylindrical shape part can have the columnar basically outside face that diameter is D.This cylindrical surface engages is according to low pressure tire of the present invention.

As previously discussed, core, perhaps all cores under the situation of the wheel that comprises two and half ones, can be incorporated into have conical portion 34 that radial outward enlarges and 36, axially extended support flange on the contrary.This tapered segment can have at about 20 ° of cone angle alphas to about 80 ° of scopes.

A pair of axially extended

cylindrical flange

38 and 39 is attached to tapered segment 34 and 36.Each cylindrical flange has diameter D, and this diameter is greater than the diameter of center drum part.Usually, the diameter D of cylindrical flange is not more than three times of length of the diameter d of core.This can help to prevent that tire breaks away from wheel rim work during use.

Cylindrical

external surface

22 and 24 and the outside face of

conical portion

34 and 36 engage according to low pressure tire 48 of the present invention.

If wheel comprises two first halves, between two and half ones, cylindrical spacer 40 can be received within on the opposed facing

groove

42 and 44 at place, the inner of the cylindrical shape part 18 that is arranged at two and half ones and 20.In some application scenario, can wish to be provided with the wheel rim 12 of the suitable roller, ball or the surface bearing that engage bolster 28.

The thickness of torus 50 can be adapted to the pressure of about 1 pound/sq in to about 10 pounds/sq in when inflation.The thickness of torus 50 can change according to the application scenario of determined vehicle.It is thicker than the wheel that is used to bear underloading to be used to bear heavily stressed wheel.For example, comprise that the wheel according to the hand barrow of tire of the present invention can have thicker than the wheel that is used for go-cart.Wall thickness according to tire of the present invention can change according to different application scenarios, depends on load weight and topographic structure at least in part.As long as the common skilled person of this area knows this disclosure and just can determine suitable wall thickness, and do not need too much experiment.

Toric revolution radius of a circle also can change according to embodiment.For example, the wheel of hand barrow can have the much bigger radius of turn of radius of turn than the wheel of go-cart.Similarly, toric diameter can change with different application scenarios.

As previously discussed, the inside diameter surface 52 of the torus 50 of tire engages the outside face of wheel rim 12.Usually, toric inside diameter surface has the diameter identical with the wheel rim external diameter.Usually, according to the axial length of wheel of the present invention about twice more than or equal to toric revolution radius of a circle, but the about π that is not more than this radius doubly.This range of sizes provides suitable mating surfaces during squeegee action during use between wheel rim and tire.

According to an embodiment,, cross the surface operation to allow about 1200 pounds load, and do not damage this surface according to tire of the present invention distributed load fully.Usually, in these cases, on a vehicle, can use six to eight wheels.But, can use any amount of wheel.According to these aspects, can use below six or the wheel more than eight.

The present invention also includes wheeled vehicle.According to wheel vehicle of the present invention comprise vehicle frame, at least one according to tire of the present invention, at least one according to tire support rim of the present invention and at least one interconnection wheel rim and vehicle frame so that the rotary axle of described at least one wheel rim and described at least one tire.The structure of vehicle frame can change according to the type of wheel vehicle.Comprise that lorry, bogie, three-wheel vehicle, go-cart, golfbag are pulled a cart, beach buggy, sandy beach wheelchair, canoe car, single-wheel barrow, barrow, buggy, four-wheeled hand truck, have hand barrow, hand trolley, knapsack car, baggage car and automatic vending car more than the four-wheel according to the example of vehicle of the present invention.The vehicle frame of these vehicles and structure are well-known, do not need these vehicles are described in further detail.

Certainly, any vehicle can use according to tire of the present invention and wheel.According to these aspects, being used for the wheel of different application occasion and the size of tire can change according to the size of vehicle and the load that is loaded etc.As long as known the disclosure that this paper comprised, the common skilled person of this area can be identified for the tire of particular vehicle and the appropriate size of wheel, and does not need too much experiment.

The present invention also comprises the method that is used for moving all land vehicles as previously discussed.This method comprises providing and is provided with at least one according to tire of the present invention and at least one vehicle according to tire support rim of the present invention.When being supported on the tire, vehicle make vehicle move through support surface then.Support surface can comprise following or other one or more in surperficial: light foam core aluminum, sand ground, muddy face, pitch, cement concrete, soil, meadow, ice face, snowfield, rock, gravel, leaf, trunk, branch and timber.

The present invention also comprises the method for making tire.This method comprises the blown-moulding torus.According to an embodiment, blown-moulding generally includes fusing and makes the material of tire by it.According to employed material, fusion temperature can change.For example, material as previously discussed can melt to about 425-430 temperature at about 350 °F-360 °F.In mould, comprise a pin.Pin produces the internal diameter of valve rod.

Material extruding becoming parison with fusing.Can be with about 500 pounds/sq in to the pressure extrusion material of about 2000 pounds/sq in.Certainly, according to the certain material that is pushed, squeeze pressure can change, can be higher or lower.After the extruding, parison employed mould from extruding vertically falls.

Cylinder mold is clamped in around this parison then.Gripping power on mould can be from about one ton to about three tons per square inch.Can insert a needle into parison then.Air and/or other gas are injected parison with the compressing parison, and the material that therefore constitutes this parison is the shape of the mould that clamps around parison.Air pressure can be changed to about 50 pounds/sq in from about 10 pounds/sq in.

Open mould, take out pin, thereby produce the internal diameter of valve rod socket or housing.Then valve rod is inserted in the socket.Use the water of soap kind will be convenient to make valve rod to insert in the valve stem socket.Can change any parameter described herein, as to be used for blown-moulding processing.Those of ordinary skill in the art can be identified for the suitable numerical value of various technological parameters, and do not need too much experiment.

Provide the enterprising enforcement of support surface that is provided with as can allow these vehicles can not use traditionally according to vehicle those tires of the present invention, such as go-cart to use at them.The present invention can also be used for many surfaces with same vehicle.For example,, go-cart can be released footway or lumber plank road, directly shift onto on the sandy beach, and can on the sandy beach, travel effectively at the place, seabeach.Traditionally, on the sandy beach fully can not or efficient use go-cart in the lowland very much.The present invention can allow the go-cart use to move on the sandy beach at the sandy beach and/or from harder support surface.

Above-mentioned explanation of the present invention illustrates and has narrated the present invention.In addition, disclosure only shows and has narrated preferred embodiment of the present invention, but as previously discussed, should be appreciated that the present invention can be used in many other combinations, modification and the environment, and the skills and knowledge that can be equivalent to above disclosure and/or association area in the expressed scope of the present invention of this paper changes or revises.The above embodiment also is used to illustrate known execution best way of the present invention, and those skilled persons that can make this field are used for these or other embodiment and certain applications or the desired many modifications of purposes of the present invention in addition with the present invention.Therefore, more than explanation is not to be used to limit the invention to described in this article form.And, think that appended claims comprises replaceable optional embodiment.

Claims

1. low pressure tire, it comprises:

Flexible, inelastic material basically, wherein this material can not be out of shape under about 225 temperature, this torus comprises the inside diameter surface and the external diameter surface that is used to contact support surface that is used to engage the tire support rim, wherein torus can be crushed under loading, so that tire moves on soft or irregular surface; And

Sealable hole is used for torus is put on the air and exits, and wherein said sealable hole comprises the valve rod housing and have the valve rod of a plurality of barbs that all barbs are from the outside tapering of valve rod.

2. tire as claimed in claim 1 is characterized in that: the internal diameter of the valve rod housing of tire is less than the maximum outside diameter of valve rod barb.

3. tire as claimed in claim 2 is characterized in that: until the internal diameter of the valve rod housing of tire less than the maximum outside diameter of valve rod at least about 50%.

4. tire as claimed in claim 1 is characterized in that: valve rod is plastics or metal.

5. tire as claimed in claim 1 is characterized in that: valve rod comprises at least three barbs.

6. tire as claimed in claim 1 is characterized in that: this material is a polyurethane.

7. tire as claimed in claim 1 is characterized in that: this material is to have elasticity, flexibility, material chemistry and/or the temperature tolerance characteristic that is similar to polyurethane.

8. tire as claimed in claim 1 is characterized in that: can increase the inflation of this tire, so that tire moves on hard support surface, and can reduce the inflation of this tire, so that tire moves on soft support surface.

9. tire as claimed in claim 1 is characterized in that also comprising:

The flange that radial inward is extended.

10. tire as claimed in claim 1 is characterized in that: the external diameter surface of contact support surface does not have reinforcement fabric or rope at least basically.

11. tire as claimed in claim 1 is characterized in that: tire is inflated to the pressure of about 1 pound/sq in to 10 pound/sq in.

12. tire as claimed in claim 1 is characterized in that: should flexibility under loading, inelastic materials is bent or flatten, but do not stretch, thus tire will can not expanded significantly outwardly when further inflating.

13. tire as claimed in claim 1 is characterized in that: when under loading, running into obstacle, flexible, inelastic materials flexural deformation, but do not stretch.

14. tire as claimed in claim 1 is characterized in that: this tire of blown-moulding.

15. tire and set of wheels component, it comprises:

Low pressure tire, it comprises flexible, basic inelastic material, wherein this material can not be out of shape in about 225 temperature, torus comprises the inside diameter surface and the external diameter surface that is used to contact support surface that is used to engage the tire support rim, wherein torus can be crushed under loading, so that tire moves on soft or irregular support surface; It also comprises the salable hole that is used for inflation of tire and venting, and wherein said salable hole comprises the valve rod housing and have the valve rod of a plurality of barbs that all barbs are towards the inside tapering of the direction of valve rod housing; And

The tire support rim, it comprises the cylindrical central portion branch of the inside diameter surface that engages tire and be used to engage the axially extended a pair of support flange of opposition side tire, that divide from central division under loading when tire is crushed.

16. tire as claimed in claim 15 and set of wheels component is characterized in that: the internal diameter of valve rod housing is less than the maximum outside diameter of valve rod.

17. tire as claimed in claim 15 and set of wheels component is characterized in that: the internal diameter of the valve rod housing of tire less than the maximum outside diameter of valve rod at least about 50%.

18. tire as claimed in claim 15 and set of wheels component is characterized in that: valve rod is plastics or metal.

19. tire as claimed in claim 15 and set of wheels component is characterized in that: valve rod comprises at least three barbs.

20. tire as claimed in claim 15 and set of wheels component is characterized in that: the material of making tire is a polyurethane.

21. tire as claimed in claim 15 and set of wheels component is characterized in that: the material of making tire is the material with elasticity, flexibility, chemistry and/or temperature tolerance characteristic of being similar to polyurethane.

22. tire as claimed in claim 15 and set of wheels component, it is characterized in that: can increase the inflation of this tire, so that tire moves on hard support surface, and can reduce the inflation of this tire, so that tire moves on soft support surface.

23. tire as claimed in claim 15 and set of wheels component is characterized in that: the core of wheel is admitted and is passed an axle of its extension, and wheel rotates about the axle.

24. tire as claimed in claim 15 and set of wheels component is characterized in that: the core of wheel is admitted and is passed an axle of its extension, and wheel and this axle rotate together.

25. tire as claimed in claim 15 and set of wheels component is characterized in that: wheel also comprises from the axially extended axle of opposition side.

26. tire as claimed in claim 15 and set of wheels component is characterized in that: the cylindrical flange of wheel partly has the diameter bigger than the diameter of inside face.

27. tire as claimed in claim 15 and set of wheels component is characterized in that: the cylindrical flange of wheel partly has three times diameter less than inner surface diameter.

28. tire as claimed in claim 15 and set of wheels component is characterized in that: tire also comprises the flange that radial inward is extended.

29. tire as claimed in claim 28 and set of wheels component, it is characterized in that: wheel rim also comprises two discerptible axially extended half ones and is used for the device that two and half ones are fixed to one another that the flange that radial inward is extended when assembling two and half is sandwiched between two and half ones.

30. tire as claimed in claim 15 and set of wheels component is characterized in that: the external diameter surface of contact support surface does not have reinforcement fabric or rope at least basically.

31. tire as claimed in claim 15 and set of wheels component is characterized in that: tire is inflated to the pressure of about 1 pound/sq in to 10 pound/sq in.

32. tire as claimed in claim 15 and set of wheels component is characterized in that: should flexibility under loading, inelastic materials is bent or flatten, but do not stretch, thus expansion outwardly significantly of tire when further inflating.

33. tire as claimed in claim 15 and set of wheels component is characterized in that: when under loading, running into obstacle, flexible, inelastic materials flexural deformation, but do not stretch.

34. tire as claimed in claim 15 and set of wheels component, it is characterized in that: torus has rotating border circular areas, and the axial length of tire support rim is the twice at least of the not radius of deformation of toric rotating border circular areas, but the π that is not more than this radius doubly.

35. tire as claimed in claim 15 and set of wheels component is characterized in that: each flange comprises conical portion that divides the radial outward expansion of extending from central division and the axially extended cylindrical flange part of extending from conical portion.

36. tire as claimed in claim 35 and set of wheels component is characterized in that: wheel rim also comprises two discerptible axially extended half ones.

37. tire as claimed in claim 15 and set of wheels component is characterized in that: wheel rim also comprises two discerptible axially extended half ones.

38. tire as claimed in claim 15 and set of wheels component, it is characterized in that: tire is distributed load fully, moves a surface to allow surpassing about 250 pounds load at every tire, and does not damage this surface.

39. tire as claimed in claim 15 and set of wheels component is characterized in that: the blown-moulding tire.

40. a wheel vehicle, it comprises:

Vehicle frame;

At least one low pressure tire, they comprise flexible, inelastic material basically, wherein this material can not be out of shape under about 225 temperature, this torus comprises the inside diameter surface and the external diameter surface that is used to contact support surface that is used to engage the tire support rim, wherein torus can be crushed under loading, so that tire moves on soft or fitfull support surface; They also are used for the sealable hole to torus inflation and venting, and wherein said sealable hole comprises the valve rod housing and have the valve rod of a plurality of barbs that all barbs are towards the inside tapering of the direction of valve rod housing;

At least one tire support rim, the cylindrical central portion that they comprise the inside diameter surface that is used to engage tire are divided and engage the axially extended a pair of support flange of opposition side tire, that divide when being used for tire and being crushed from central division under loadings; And

At least one axle, their interconnection wheel rim and vehicle frames are so that described at least one wheel rim and described at least one tire can turn round.

41. wheel vehicle as claimed in claim 40 is characterized in that: the internal diameter of valve rod housing is less than the maximum outside diameter of valve rod.

42. wheel vehicle as claimed in claim 40 is characterized in that: the internal diameter of valve rod housing less than the maximum outside diameter of valve rod at least about 50%.

43. wheel vehicle as claimed in claim 40 is characterized in that: valve rod comprises at least three barbs.

44. wheel vehicle as claimed in claim 40 is characterized in that: vehicle is to pull a cart, canoe car, beach buggy, husky Huaihe River go-cart chair, single-wheel barrow, barrow, buggy, four-wheeled hand truck, have the vehicle that Che Zuzhong that hand barrow more than the four-wheel, hand trolley, knapsack car, baggage car and automatic vending car form selects from lorry, bogie, three-wheel vehicle, go-cart, golfbag.

45. wheel vehicle as claimed in claim 40 is characterized in that: the blown-moulding tire.

46. a method that is used for mobile land vehicle, this method comprises:

At least one vehicle that is provided with at least one low pressure tire is provided, this tire comprises flexible, basic inelastic material, wherein this material can not be out of shape under about 225 temperature, torus comprises the inside diameter surface and the external diameter surface that is used to contact support surface that is used in conjunction with the tire support rim, wherein torus can be crushed under loading, so that tire moves on soft or fitfull support surface; This tire also comprises the sealable hole that is used for torus inflation and venting, and wherein said sealable hole comprises the valve rod housing and have the valve rod of a plurality of barbs that barb is towards the inside tapering of the direction of valve rod housing;

The tire support rim is provided, and the cylindrical central portion that it comprises the inside diameter surface that is used to engage tire is divided and is engaged the axially extended a pair of support flange of opposition side tire, that divide when being used under loading tyre collapse from central division; And

Move through support surface when making vehicle on being supported in tire.

47. method as claimed in claim 46 is characterized in that: support surface comprises at least one surface of selecting in the surface group that foam core aluminum, sand ground, muddy face, pitch, cement concrete, soil, meadow, ice face, snowfield, rock, gravel, leaf, tree bar, branch and timber are formed on the lenient side.

48. method as claimed in claim 46 is characterized in that: the blown-moulding tire.

49. a method of making tire, this method comprises:

The inelastic material blown-moulding flexibility, basic, wherein this material can not be out of shape under about 225 temperature, torus comprises the inside diameter surface and the external diameter surface that is used to contact support surface that is used to engage the tire support rim, wherein torus can be crushed under loading, so that tire moves on soft or irregular support surface; And

In torus, be provided for sealable hole, pin be set during wherein also being included in blown-moulding in mould torus inflation and venting;

Open mould, take out described pin, produce the internal diameter of valve stem socket;

Valve rod is inserted described socket, and wherein valve rod comprises a plurality of barbs.