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Title:
AUTOMATED AIR PUMPING WHEEL
Document Type and Number:
WIPO Patent Application WO/2017/072795
Kind Code:
A1
Abstract:
The present invention discloses an air pumping wheel frame or a self inflatable wheel for different vehicular applications favouring automatic wheel/tyre inflating. The present self inflatable wheel comprises a displaceable wheel hub and a wheel rim supporting an inflatable wheel tyre, wherein the displaceable wheel hub and the wheel rim includes an operative connection therebetween of at least one air pumping mechanism such that any displacement of said displaceable wheel hub with respect to said wheel rim cooperates to activate said air pumping mechanism to fill air into said inflatable wheel tyre.

Inventors:
MANDAL SOMJIT (IN)
Application Number:
PCT/IN2016/050368
Publication Date:
May 04, 2017
Filing Date:
October 28, 2016
Export Citation:
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Assignee:
MANDAL SOMJIT (IN)
International Classes:
B60C23/12
Foreign References:
US3452801A1969-07-01
US1057846A1913-04-01
EP0621144A11994-10-26
US6286572B12001-09-11
US7810533B22010-10-12
Attorney, Agent or Firm:
SEN, Anjan (17, Chakraberia Road ,Kolkata - 5, West Bengal, India, Kolkata 700025, IN)
Download PDF:
Claims:
CLAIMS:

1. A Self inflatable wheel for different vehicular applications favouring automatic wheel tyre/tube inflating comprising a displaceable wheel hub; a wheel rim supporting an inflatable wheel tyre/tube; said displaceable wheel hub and said wheel rim having operative connection therebetween of at least one air pumping mechanism such that any displacement of said displaceable wheel hub with respect to said wheel rim cooperates to activate said air pumping mechanism to fill air into said inflatable wheel tyre.

2. A self inflatable wheel as claimed in claim 1 comprising said displaceable wheel hub supported with respect to shock absorber means for absorbing shocks during motion of the vehicle.

3. A Self inflatable wheel as claimed in anyone of claims 1 or 2 wherein said displaceable wheel hub movement and/or said cooperative shock absorber means is adapted to cooperate to activate an air pumping mechanism for automatic wheel/tyre inflating during motion of vehicle and/or shock absorber motion and/or wheel hub.

4. A Self inflatable wheel as claimed in anyone of claims 1 to 3 comprising : a displaceable wheel hub centrally disposed with respect to said wheel rim; said wheel rim supporting an inflatable wheel tyre; said displaceable wheel hub with respect to said wheel rim having operative connection therebetween of (i) atleast one shock absorbing mechanism and/or (ii) atleast one air pump or an air pump with internal resilience whereby any said displacement of the displaceable wheel hub is accompanied with operation of said shock absorbing mechanism and also said air pump to pump in air into said inflatable wheel/tyre for automatic filling of air in said wheel during motion of said vehicle.

5. A Self inflatable wheel as claimed in anyone of claims 1 to 4 wherein said air pump is operatively connected to the said inflatable wheel tyre/tube directly or through a central air chamber supply unit which in turn is adapted to feed air into the inflatable wheel tyre/tube when air pressure in the inflatable wheel tyre /tube is below any specified level.

6. A Self inflatable wheel as claimed in anyone of claims 1 to 5 comprising a wheel hub connectable to the vehicular application; a wheel rim supporting an inflatable wheel tyre and coupled with said wheel hub under resilient bias enabling said wheel rim for selective and provisional repositioning with respect to said wheel hub; atleast one air pumping means connected between said wheel hub and said wheel rim configured to pump air into the inflatable wheel tyre by involving the repositioning of the wheel rim with respect of the wheel hub.

7, A Self inflatable wheel as claimed in as claimed in claim 6, comprises atleast one resilient connecting member for resiliently couple the wheel rim with the wheel hub enabling simultaneous rotation of the wheel hub with the wheel rim while it rotates on road/surface during movement of the vehicular application.

8. A Self inflatable wheel as claimed in claim 6 or 7, wherein the air pumping means preferably includes displacement type air pumps fitted between the wheel rim and the wheel hub configured to rotate with the wheel rim and concurrently displace with the repositioning of the wheel rim with respect of the wheel hub thereby pump air into the inflatable wheel tyre or a central air chamber.

9. A Self inflatable wheel as claimed in anyone of claims 6 to 8, wherein the wheel rim includes the inflatable wheel tyre covering its external periphery which makes direct contact of road/surface on which said wheel rim is configured to rotate for movement of said vehicular application.

10. A Self inflatable wheel as claimed in anyone of claims 6 to 9, wherein the resilient connecting member includes anyone of spring means, hydraulic suspension means, shock absorber, leaf springs configured for

(i) retaining the wheel rim concentrically with respect to the wheel hub upto a predefined value of shock that encountered by the wheel rim, and

(ii) enabling the provisional repositioning of the wheel rim in an eccentric position with respect to the wheel hub when the shock applied on said wheel rim exceeds said predefined value allowing the wheel rim to absorb the shock from reaching to the wheel hub under resilient bias of said resilient connecting member; wherein said provisional repositioning of the wheel rim in the eccentric position displace the wheel rim with respect of the wheel hub causing concurrent displacement of the air pumps fitted between the wheel rim and the wheel hub for pumping the air into the inflatable wheel tyre or tyre tube.

11. A Self inflatable wheel as claimed in anyone of claims 6 to 10, wherein the resilient connecting member includes anyone of spring means, hydraulic suspension means, shock absorber, leaf springs configured for

(i) retaining the wheel rim eccentrically with respect to the wheel hub under compressive load or expansive load in upper portion of wheel rim or both of the vehicular application providing lower portion of the wheel rim, which makes contact with the road/surface on which said wheel rim is configured to rotate, closer to the wheel hub, (ii) subjecting the air pumping mean successive compression when it disposed lower portion of the wheel rim and expansion when it disposed upper portion of the wheel rim due to the continuous rotation of the wheel; wherein successive compression and expansion of the air pumping means with the rotation of the wheel causing concurrent displacement of the air pumps enabling pumping the air into the inflatable wheel tyre.

12. A Self inflatable wheel as claimed in anyone of claims 6 to 11, wherein the air pumping means is adapted to couple the wheel rim with the wheel hub under resilient bias.

13. A Self inflatable wheel as claimed in anyone of claims 6 to 12, comprises a central air chamber selectively positioned covering the wheel rim or in any suitable position with respect to the wheel configuration to receive the air from the air pumping means and thereafter supply the received air to the inflatable wheel tyre when air pressure in the inflatable wheel tyre or tyre tube falls down from its standard/normal air pressure.

14. A Self inflatable wheel as claimed in anyone of claims 6 to 13, wherein the central air chamber comprises atleast one unidirectional air inlet for each air pumping means to receive and store the air from the air pumping means; atleast one unidirectional air outlet to supply the stored air into the inflatable wheel tyre or tyre tube; atleast one pressure relief valve to release extra air and maintain constant air pressure equal or slightly greater than the standard/normal air pressure of the inflatable wheel tyre or tyre tube.

15. A Self inflatable wheel as claimed in anyone of claims 6 to 14, wherein each air pumping means includes flexible connecting pipe configured to connect air delivery port of the air pump with its corresponding unidirectional air inlet in the central air chamber.

16. A Self inflatable wheel as claimed in anyone of cla ims 6 to 15, wherein the unidirectional air outlet is operatively connected to pneumatic tire valve of the inflatable wheel tyre or tyre tube through a separate connecting pipe; wherein the pneumatic tire valve gets opened due to air pressure difference between the central air chamber and the wheel tyre/tyre tube generated upon loss of air in the wheel tyre/tyre tube allowing passing of the air from the central air chamber to the inflatable wheel tyre/tyre tube till compensating the losses of air from the wheel tyre/tyre tube, and when the air pressure in the inflatable wheel tyre/tyre tube get raised to its standard/normal air pressure, the pneumatic tire valve get closed thus stopping passing of the air from the central air chamber to the wheel tyre/tyre tube.

17. A Self inflatable wheel as claimed in anyone of claims 6 to 16, wherein the central air chamber further includes atleast one mountings for installing wheel parameter monitoring mechanism including air pressure monitor to continuously monitor air pressure inside the central air chamber.

18. A shock absorbing air pumping wheel as claimed in anyone of claims 6 to 17, wherein the vehicular application includes various automotive applications like car, bicycles etc and non-automotive applications like casters, carts, !awnmowers, and wheelchairs.

Description:
TITLE: AUTOMATED AIR PUMPING WHEEL

FIELD OF THE INVENTION:

The present invention relates to automatically pumping air into wheel tyre that covers wheel of vehicles. More specifically, the present invention is directed to develop an automated air pumping wheel/wheel frame or self inflatable wheel for different vehicular applications favouring automatic wheel/tyre inflating by absorbing shock that applied to the wheel/wheel frame during movement of the vehicular applications.

BACKGROUND OF THE INVENTION:

A wheel tyre is basically a ring-shaped wheel component that covers periphery of the wheel to protect it from direct contact of road/surface on which it rotates. Most air inflatable wheel tyres such as those used in the wheels of various automotive applications like car, bicycles etc and non-automotive applications like casters, carts, !awnmowers, and wheelchairs are inflated with air to provide flexible cushion and traction between the wheel and the road.

The normal air inflatable wheel tyre includes a tread and a body wherein the tread provides the traction and the body provides containment for a quantity of compressed air to form an inflatable cushion and absorbs primary shocks that applied to wheel due to rotation of the wheel on uneven roads/surfaces. However, the inflatable cushioning support provided by such air inflated wheel tyre is not adequate for absorbing large shocks originated due to rotation of the wheel on uneven road/surface and importantly the air inflated wheel tyre generally losses its air with time and use. Thus the traction and inflatable cushioning support as provided by the air inflated wheel tyre which is not adequate for absorbing the large shocks, also requires intermittent pumping of air into the tyre by stalling the wheel rotation .

In automotive applications, additional shock absorbing devices are connected to the wheel to absorb the large shocks. However, such shock absorbing devices are bulky and not suitable for various non-automotive applications like casters, carts, lawnmowers, and wheelchairs. Recently some low weight shock absorbing wheels have been reported in the art which are directed to provide shock-absorbing effects similar to bulky shock absorbing devices that are used in automotive applications.

US 6286572 discloses a shock-absorbing safety wheel which includes a rim, a hub at the center of the rim and connected by a plurality of spring plates and radial support, and a solid tire slidably mounted on the outer periphery of the rim and secured by a pair of rim shields. It is characterized that the spring plates provide shock-absorbing function to the wheel.

US 7810533 discloses an internal wheel suspension and shock absorbing system, including a hub with radially extending rods or blades, cooperating with sector braces, fixedly mounted by hubs to the interior of the rim for a wheel. The rods and blades secure onto a hub that mounts onto the vehicle axle, for rotation. When a force is encountered, the forces are absorbed by the blades that extend either through or cooperate with the braces and biasing springs, which are adjustable, that bias against the outer radial edges of the blades or telescoping rods, and absorb the vector forces generated from any impact.

The above light weight shock absorbing wheels can be used in various automotive applications and non-automotive applications to absorb the large shocks encountered by the wheel due to its rotation on uneven roads/surfaces. However although such shock absorbing wheels are now made available the same is constructional feature wise more complex than simple no shock absorbing wheels and also have the same problem when faced with the requirement of intermittent pumping of the air into the wheel tyre by stalling the wheel rotation to form the inflatable cushion for absorbing the primary shocks and providing tractions.

Thus there has been a need for developing wheel frames with shock absorbing mechanisms which can advantageously be more user friendly and continually ready for performing maintaining required level of air pumped automatically into the wheel tire and in the process avoid any essential stoppage for pumping air i nto the wheel tyre as and when required . OBJECT OF THE INVENTION:

It is thus the basic object of the present invention is to develop a self inflatable wheel for different vehicular applications which would be adapted to favour automatic wheel/tyre inflating .

Another object of the present invention is to develop a self inflatable wheel for different vehicular applications which would be adapted to absorb shock applied on wheels and utilize the shock to pump air into the inflatable tyre of the wheel.

Yet another object of the present invention is to develop a self inflatable wheel for different vehicular applications with inbuilt shock absorbing and air pumping mechanism for automatic wheel/tyre inflating during rotation of the wheel and/or shock absorption by the wheel.

Another object of the present invention is to develop a self inflatable wheel for different vehicular applications including various automotive applications like car, bicycles etc and non -automotive applications like casters, carts, Sawnmowers, and wheelchairs.

SUMMARY OF THE INVENTION:

Thus according to the basic aspect of the present invention there is provide a Self inflatable wheel for different vehicular applications favouring automatic wheel/tyre inflating comprising a displaceable wheel hub; a wheel rim supporting an inflatable wheel tyre; said displaceable wheel hub and said wheel rim having operative connection therebetween of at least one air pumping mechanism such that any displacement of said displaceable wheel hub with respect to said wheel rim cooperates to activate said air pumping mechanism to fill air into said inflatable wheel tyre.

In a preferred embodiment of the present self inflatable wheel, the displaceable wheel hub is supported with respect to shock absorber means for absorbing shocks during motion of the vehicle.

In a preferred embodiment of the present self inflatable wheel, the displaceable wheel hub movement and/or said cooperative shock absorber means is adapted to cooperate to activate an air pumping mechanism for automatic wheel/tyre inflating during motion of vehicle and/or shock absorber motion and/or wheel hub.

In a preferred embodiment, the present self inflatable wheel comprises a displaceable wheel hub centrally disposed with respect to said wheel rim; said wheel rim supporting an inflatable wheel tyre; said displaceable wheel hub with respect to said wheel rim having operative connection therebetween of (i) atleast one shock absorbing mechanism and/or (ii) atleast one air pump or an air pump with internal resilience whereby any said displacement of the displaceable wheel hub is accompanied with operation of said shock absorbing mechanism and also said air pump to pump in air into said inflatable wheel/tyre for automatic filling of air in said wheel during motion of said vehicle.

In a preferred embodiment of the present self inflatable wheel, the air pump is operatively connected to the inflatable wheel tyre/tube directly or through a central air chamber supply unit which in turn is adapted to feed air into the inflatable wheel tyre/tube when air pressure in the inflatable wheel tyre /tube is below any specified level. In a preferred embodiment, the present self inflatable wheel comprises a wheel hub connectable to the vehicular application; a wheel rim supporting an inflatable wheel tyre and coupled with said wheel hub under resilient bias enabling said wheel rim for selective and provisional repositioning with respect to said wheel hub; atleast one air pumping means connected between said wheel hub and said wheel rim configured to pump air into the inflatable wheel tyre by involving the repositioning of the wheel rim with respect of the wheel hub.

In a preferred embodiment, the present self inflatable wheel comprises atleast one resilient connecting member for resiliently couple the wheel rim with the wheel hub enabling simultaneous rotation of the wheel hub with the wheel rim while it rotates on road/surface during movement of the vehicular application.

In a preferred embodiment of the present self inflatable wheel, the air pumping means preferably includes displacement type air pumps fitted between the wheel rim and the wheel hub configured to rotate with the wheel rim and concurrently displace with the repositioning of the wheel rim with respect of the wheel hub thereby pump air into the inflatable wheel tyre.

In a preferred embodiment of the present self inflatable wheel, the wheel rim includes the inflatable wheel tyre covering its external periphery which makes direct contact of road/surface on which said wheel rim is configured to rotate for movement of said vehicular application. In a preferred embodiment of the present self inflatable wheel, the resilient connecting member includes anyone of spring means, hydraulic suspension means, shock absorber, leaf springs configured for

(i) retaining the wheel rim concentrically with respect to the wheel hub upto a predefined value of shock that encountered by the wheel rim, and

(ii) enabling the provisional repositioning of the wheel rim in an eccentric position with respect to the wheel hub when the shock applied on said wheel rim exceeds said predefined value allowing the wheel rim to absorb the shock from reaching to the wheel hub under resilient bias of said resilient connecting member; wherein said provisional repositioning of the wheel rim in the eccentric position displace the wheel rim with respect of the wheel hub causing concurrent displacement of the air pumps fitted between the wheel rim and the wheel hub for pumping the air into the inflatable wheel tyre or tyre tube.

In a preferred embodiment of the present self inflatable wheel, the resilient connecting member includes anyone of spring means, hydraulic suspension means, shock absorber, leaf springs configured for

(i) retaining the wheel rim eccentrically with respect to the wheel hub under compressive load or expansive load in upper portion of wheel rim or both of the vehicular application providing lower portion of the wheel rim, which makes contact with the road/surface on which said wheel rim is configured to rotate, closer to the wheel hub,

(ii) subjecting the air pumping mean successive compression when it disposed lower portion of the wheel rim and expansion when it disposed upper portion of the wheel rim due to the continuous rotation of the wheel; wherein successive compression and expansion of the air pumping means with the rotation of the wheel causing concurrent displacement of the air pumps enabling pumping the air into the inflatable wheel tyre. In a preferred embodiment of the present self inflatable wheel, the air pumping means is adapted to couple the wheel rim with the wheel hub under resilient bias.

In a preferred embodiment, the present self inflatable wheel comprises a central air chamber selectively positioned covering the wheel rim or in any suitable position with respect to the wheel configuration to receive the air from the air pumping means and thereafter supply the received air to the inflatable wheel tyre when air pressure in the inflatable wheel tyre or tyre tube falls down from its standard/normal air pressure.

In a preferred embodiment of the present self inflatable wheel, the central air chamber comprises atleast one unidirectional air inlet for each air pumping means to receive and store the air from the air pumping means; atleast one unidirectional air outlet to supply the stored air into the inflatable wheel tyre or tyre tube; atleast one pressure relief valve to release extra air and maintain constant air pressure equal or slightly greater than the standard/normal air pressure of the inflatable wheel tyre or tyre tube.

In a preferred embodiment of the present self inflatable wheel, each air pumping means includes flexible connecting pipe configured to connect air delivery port of the air pump with its corresponding unidirectional air inlet in the central air chamber.

In a preferred embodiment of the present self inflatable wheel, the unidirectional air outlet is operatively connected to pneumatic tire valve of the inflatable wheel tyre or tyre tube through a separate connecting pipe; wherein the pneumatic tire va lve gets opened due to air pressure difference between the central air cha mber and the wheel tyre/tyre tube generated upon loss of air in the wheel tyre/tyre tube a llowing passing of the a ir from the centra l air cha mber to the inflata ble wheel tyre/tyre tube till compensating the losses of air from the wheel tyre/tyre tube, and when the air pressure in the inflatable wheel tyre/tyre tube get raised to its standard/normal air pressu re, the pneumatic tire valve get closed thus stopping passing of the a ir from the central air chamber to the wheel tyre/tyre tube.

In a preferred embod iment of the present self inflatable wheel, the centra l air chamber further includes atleast one mountings for installing wheel parameter monitoring mechanism including air pressure monitor to continuously

monitor air pressure inside the centra l air chamber.

In a preferred embodiment of the present self inflata ble wheel, the vehicula r application includes va rious automotive applications like car, bicycles etc a nd non - automotive applications like casters, carts, !awnmo ers, and wheelchairs,

BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS:

Figure 1 shows a preferred self inflatable wheel embod iment in accordance with the present invention . Figure 2 shows a preferred self inflatable wheel embod iment with leaf spring in accordance with the present invention .

Figure 3 shows a preferred self inflata ble wheel embodiment with air pressure monitor in accordance with the present invention .

Figure 4 shows a preferred self inflatable wheel embodiment without air cha mber in accordance with the present invention .

Figure 5 shows operation of the present self inflatable wheel in absorbing shock that applied to wheel during movement a nd simultaneously pumping air into the tyre covering the wheel . Figure 6 shows operation of the present self inflatable wheel during pumping air into the tyre covering the wheel under compressive force applied on the wheel.

DETAILED DESCRIPTION OF THE INVENTION WITH REFERENCE TO ACCOMPANYING DRAWINGS:

As stated hereinbefore, the present invention discloses an automated air pumping wheel/wheel frame for different vehicular applications which can absorb any shock applied on the wheel/wheel frame and simultaneously pumps air into tyre (or tyre tube) of the wheel by using the shock that applied on the wheel/wheel frame. More specifically, the present invention discloses a self inflatable wheel for different vehicular applications favouring automatic wheel/tyre inflating . The present self inflatable wheel includes a displaceable wheel hub and a wheel rim supporting an inflatable wheel tyre. The displaceable wheel hub and the wheel rim are operatively connected with each other having one or more in between air pumping mechanism which enables activation of the air pumping mechanism with the displacement of the displaceable wheel hub with respect to the wheel rim to fill air into the inflatable wheel tyre.

In the present self inflatable wheel, the displaceable wheel hub is supported with respect to a shock absorber means for absorbing shocks during motion of the vehicle and cooperatively activate the air pumping mechanism for automatic wheel/tyre inflating during motion of the vehicle and /or shock absorber motion and/or wheel hub, whereby any displacement of the displaceable wheel hub is accompanied with operation of the shock absorbing mechanism and the pumping mechanism to pump in air into the inflatable wheel/tyre. A preferred embodiment of the present self inflatable wheel may includes a wheel hub connectable to any wheel connection arrangement of a vehicular application, a wheel rim coupled with the wheel hub under resilient bias and one or more air pumping means connected between the wheel hub and the wheel rim configured for pumping air into an inflatable wheel tyre covering external periphery of the wheel rim which makes direct contact of road/surface on which the wheel is configured to rotate for moving the vehicular application. The coupling between the wheel hub and the wheel rim enables simultaneous rotation of the wheel hub with the wheel rim while it rotates on the road/surface. The resilient nature of the coupling between the wheel hub and the wheel rim facilitates the wheel rim to be selectively and provisionally repositioned with respect to the wheel hub. The air pumping means which are connected between the wheel hub and the wheel rim is configured to pump air into the inflatable wheel tyre by involving energy corresponding to the repositioning of the wheel rim with respect of the wheel hub.

Reference is now invited from the accompanying figure 1, which schematically represents the present self inflatable wheel embodiment. As shown in the referred figure, the present self inflatable wheel embodiment includes three resilient connecting members (4, 5, 6) for resiliently couple the wheel rim (8) with the wheel hub (9) . Each of the resilient connecting members (4, 5, 6) are pivotally attached with the wheel rim (8) and the wheel hub (9) enabling the wheel rim to selectively and provisionally reposition with respect to said wheel hub under resilient bias to absorb any shock applied to the wheel rim (8) before reaching to the wheel hub (9) .

On or more air pumping means cooperative to the resilient connecting members are connected between the wheel hub (9) and the wheel rim (8) . The air pumping means preferably includes one or more small sizes positive displacement air pump/bicycle pump (i, 2 and 3 according to fig . l) fitted between wheel rim (8) and wheel hub (9) in a manner such that these pumps can rotate with the wheel rim and concurrently displace with the repositioning of the wheel rim with respect of the wheel hub to pump air into the inflatable wheel tyre ( 16) covering the wheel rim (8) .

The resilient connecting member preferably includes anyone of spring means, hydraulic suspension means, shock absorber, leaf springs and like. The self inflatable wheel embodiment as shown in the figure 1, the resilient connecting member includes spring means or shock absorbers whereas in an alternate embodiment of the present inflatable wheel tyre as shown in the accompanying figure 2, the resilient connecting member includes leaf spring . The number of resilient connecting members used in these embodiments for providing resilient bias between the wheel hub (9) and the wheel rim (8) can be varied according to the requirement. The present self inflatable wheel will also be workable with more or less than three resilient connecting members. In an alternate embodiment the resilient bias between the wheel hub (9) and the wheel rim (8) can also be provided by the air pump itself having required internal resilience.

The self inflatable wheel embodiment as shown in the figure 1 also comprises a central air chamber (7) covering external periphery of the wheel rim and selectively positioned in the wheel preferably in the interface of the wheel rim and the tyre ( 16) to receive the air from the air pumps ( 1, 2 and 3) and thereafter supply the received air to the tyre (16) when air pressure in the tyre or tyre tube falls down from its standard/normal air pressure.

The central air chamber comprises one or more unidirectional air inlet for each air pumps to receive the air from the air pumping means, one or more unidirectional air outlet to supply the stored air into the tyre or tyre tube and one or more pressure relief valve to release extra air and maintain constant air pressure equal or slightly greater than the standard/normal air pressure of the inflatable wheel tyre or tyre tube.

Each air pumping means includes comparatively longer connecting pipe ( 11, 12 and 13) configured to connect air delivery port of the air pumps (i, 2 and 3) with its corresponding unidirectional air inlet in the central air chamber (7). The unidirectional air outlet of the central air chamber (7) is further connected with a pneumatic tire valve ( 15) by using a separate comparatively shorter connecting pipe (14). This pneumatic tire valve (15) is directly fitted with the tyre/tyre tube ( 16) . The pneumatic tire valve gets opened due to air pressure difference between the central air chamber and the tyre/tyre tube generated upon loss of air in the inflatable wheel tyre /tyre tube allowing passing of the air from the central air chamber to the inflatable wheel tyre/tyre tube till compensating the losses of air from the inflatable wheel tyre/tyre tube. Gradually, when the air pressure in the inflatable wheel tyre /tyre tube get raised to its standard/normal air pressure, the pneumatic tire valve get closed thus stopping passing of the air from the central air chamber to the inflatable wheel tyre /tyre tube. In an embodiment of the present air pumping wheel as shown in the accompanying figure 3, an air pressure monitor is connected with the central air chamber for continuously monitor the air pressure inside the central air chamber.

It is important to note that the central air chamber is provided with the present self inflatable wheel to make it compatible with present commercially available wheel tyres having only one air input port. So, if the press relief valve is provided on that only air input port then there will be no place left for other for supplying pumped air into the wheel tyre. However for wheel tyres having more than one air input port, the requirement of providing the central air chamber at the interface of the wheel rim and the tyre can be avoided by connecting the air pumps and the pressure release valve directly to the tyre/tyre tube. Such embodiment of the present self inflatable wheel without the central air chamber is shown in the accompanying figure 4.

Reference is next invited from the accompanying figure 5, which shows operation of the present self inflatable wheel during absorbing shock that applied to wheel/wheel rim during its rotation on uneven road/surface and simultaneously pumping air into the inflatable wheel tyre covering the wheel rim. As shown in the figure, the wheel rim is concentrically retained with respect to the wheel hub under resilient bias of the resilient connecting member (I) . When the wheel rim encounter an obstacle which causing a shock exceeding a predefined value, the resilient connecting member immediate to the obstacle reconfigures itself (i.e. gradual compression of the spring) enabling the provisional repositioning of the wheel rim in an eccentric position with respect to the wheel hub under resilient bias of the reconfiguring resilient connecting member (II) . The repositioning of the wheel rim displace the wheel rim portion encountering with the obstacle towards the wheel hub under resilient bias and allowing the wheel rim to absorb the shock from reaching to the wheel hub . This provisional repositioning of the wheel rim causing concurrent displacement of the air pumps fitted between the wheel rim and the wheel hub for pumping the air into the tyre or tyre tube.

After removal of the obstacle/absorption of the shock, the reconfigured resilient connecting member returns to its original configuration (i.e. expansion of the spring) which again disposes the wheel rim concentric to the wheel hub (III). Reference is next invited from the accompanying figure 6 which shows operation of the present self inflatable wheel during pumping air into the inflatable wheel tyre covering the wheel rim using rotation of the wheel on the road/surface. In this case, the resilient connecting members are configured (the resilient connecting members are more flexible) to retain the wheel rim eccentrically with respect to the wheel hub under compressive load or expansive load in upper portion of wheel rim or both of the vehicular application providing lower portion of the wheel rim, which makes contact with the road/surface on which said wheel rim is configured to rotate, closer to the wheel hub. During rotation of the wheel, the air pumping mean fitted between the wheel hub and the wheel rim are subjected to successive compression when it disposed lower portion of the wheel rim and expansion when it disposed upper portion of the wheel rim due to the continuous rotation of the wheel . This successive compression and expansion of the air pumping means with the rotation of the wheel causes concurrent displacement of the air pumps which enables pumping of the air into the inflatable wheel tyre or tyre tube.

It is thus the present invention provides a unique self inflatable wheel which is light weight and adapted to automatically pump air into the inflatable tyre including both tubeless and with tube tyres of the wheel of various automotive applications like car, bicycles etc and non-automotive applications like casters, carts, lawnmowers, and wheelchairs by either using energy while absorbing the large shocks encountered by the wheel due to its rotation on uneven roads/surfaces or continuous rotation of the wheel. The present self inflatable wheel thus automatically maintain standard air pressure in the inflatable tyre of the wheel and avoid or alleviate the requirement of intermittent pumping of the air into the wheel tyre by stalling the wheel rotation to form the inflatable cushion for absorbing the primary shocks and providing tractions.