US20040016492A1 - Electromagnetically activated on-wheel air pump - Google Patents
Electromagnetically activated on-wheel air pump Download PDFInfo
- Publication number
- US20040016492A1 US20040016492A1 US10/205,547 US20554702A US2004016492A1 US 20040016492 A1 US20040016492 A1 US 20040016492A1 US 20554702 A US20554702 A US 20554702A US 2004016492 A1 US2004016492 A1 US 2004016492A1
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- United States
- Prior art keywords
- plunger
- pump
- electromagnet
- tire
- arrangement
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
- B60C23/10—Arrangement of tyre-inflating pumps mounted on vehicles
- B60C23/12—Arrangement of tyre-inflating pumps mounted on vehicles operated by a running wheel
- B60C23/126—Arrangement of tyre-inflating pumps mounted on vehicles operated by a running wheel the pumps being mounted on the wheel rims
Definitions
- the present invention relates to air-inflated tires of automotive vehicles. More specifically, the invention relates to an electromagnetically activated pump for inflating the tires on such vehicles.
- TPM tire pressure monitoring
- a device such as an on-board compressor to correct air pressure deficiencies.
- the TPM system detects a low tire pressure signal, it relays the information to the on-board compressor system, which then operates to inflate the corresponding tire.
- Such compressor systems are large and bulky and can be expensive to implement.
- the present invention integrates a tire pump with the wheel rim of a vehicle.
- the pump is activated electromagnetically to automatically inflate the tire when tire pressure is below a required value.
- the pump extends from the atmosphere through the wheel rim and into the interior portion of the tire.
- the portion of the pump which is exposed to the atmosphere contains an air inlet for allowing air into the pump.
- a plunger within the pump operates to provide both opened and closed positions. In the open position, air from the atmosphere is allowed into the pump through the air inlet. When the plunger moves to the closed position, air is pushed through a valve into the inflatable portion of the tire.
- the plunger is forced into the open position by a biasing element.
- the biasing element retains the plunger in the open position until an electromagnet is activated.
- the electromagnet which is located on a vehicular component in close proximity with the wheel rim, reacts against the plunger, which is a permanent magnet, forcing the plunger into the closed position.
- the electromagnet which is activated upon receiving a low tire signal from the vehicle's body controller, reacts with the plunger when normal wheel rotation moves the pump within close proximity to the electromagnet.
- the biasing element returns the plunger to the open position when wheel rotation moves the pump out of the range of the electromagnet.
- FIG. 1 is a side view of a vehicle wheel employing the integrated air pump and mounted electromagnet of the present invention.
- FIG. 2 is a cross-section of the vehicle wheel of FIG. 1 employing the air pump and electromagnet of the present invention.
- FIG. 3 is a diagram showing the pump of the present invention with the piston in the open position.
- FIG. 4 is a diagram showing the pump in close proximity with the electromagnet, causing the piston to be in the closed position.
- a vehicle wheel 10 as is used for automotive vehicles includes an inflatable tire 12 which is mounted on a wheel rim 14 having an inner annular surface 16 and an outer annular surface 18 .
- An inflatable region 20 is disposed between the outer annular surface 18 of the wheel rim 14 and the inner surface of the inflatable tire 12 .
- the wheel 10 is mounted on an automotive vehicle, bringing the wheel rim 14 in proximity with vehicle components such as the brake rotor 22 and brake caliper support 24 .
- An electromagnetically activated air pump 30 embodying the present invention is integrated with the wheel rim 14 .
- the pump 30 extends from the inner annular surface 16 to the outer annular surface 18 .
- the pump 30 interacts with an electromagnet 32 mounted on the brake caliper support 24 to force air from the atmosphere through the wheel rim 14 and into the inflatable tire 12 .
- FIG. 2 a cross-section of the vehicle wheel 10 mounted on a vehicle axle 40 is shown.
- the radially inner portion 42 of the pump 30 is exposed to atmosphere.
- the pump 30 passes through the wheel rim 14 and terminates with the radially outer portion 44 in fluid communication with the interior of inflatable tire 12 .
- An electromagnet 32 is mounted on a vehicular component within the perimeter defined by the inner annular surface 16 of the wheel rim 14 .
- the electromagnet 32 as shown is mounted on the brake caliper support 24 , those skilled in the art will anticipate that the electromagnet 32 may be mounted on other proximate vehicular components.
- the pump 30 may be mounted elsewhere on the annular portion of the wheel rim 14 .
- the pump 30 is mounted parallel to the axis of the wheel 10 . In this arrangement, the centrifugal force created by tire rotation has a minimized effect on the performance of the pump 30 .
- the pump 30 includes an air inlet 50 .
- the air inlet 50 is disposed on the radially inner portion 42 of the pump body 52 .
- a plunger 54 having a magnet integrated therewith is disposed within the pump body 52 .
- the plunger 54 may be magnetic, or include a magnetic component fixedly attached thereto.
- the plunger 54 is shown in the open position, which allows air from the atmosphere to enter the pump body 52 through the air inlet 50 .
- a biasing element 56 retains the plunger 54 in the open position.
- the biasing element 56 is illustrated as a spring.
- the biasing element 56 may be a permanent magnet disposed within the pump body 52 which retains the magnetic plunger 54 in the open position.
- the air inlet 50 can be a one-way valve which allows air from the atmosphere through the air inlet 50 into the pump body 52 , but prevents air from within the pump body 52 from entering the atmosphere.
- the radially outer portion 44 communicates with the inflatable tire 12 .
- Air within the pump body 52 is forced through the radially outer portion 44 as the magnetic plunger 54 moves into the closed position, as shown in FIG. 4.
- the radially outer portion 44 includes a one-way valve 58 which allows air to enter the inflatable tire 12 but prevents air from entering the pump body 52 from the inflatable tire 12 .
- the shape of the plunger 54 is substantially equivalent to that of the pump body 52 so as to allow the plunger 54 to reciprocate within the pump body 52 .
- the plunger 54 and the pump body 52 are cylindrical.
- the electromagnet 32 is fixedly located so that normal rotation of the wheel rim 14 will move the pump 30 , and therefore the magnetic plunger 54 , within proximity of the electromagnet 32 .
- the magnetic plunger 54 is within a predetermined range of the electromagnet 32 , if the electromagnet 32 is energized a force is exerted on the plunger 54 of sufficient strength to overcome the biasing element 56 , causing the plunger 54 to move to the closed position as shown in FIG. 4.
- the resulting absence of magnetic force upon the plunger 54 from the electromagnet 32 allows the biasing element 56 to return the plunger 54 to the open position as shown in FIG. 3.
- the electromagnet 32 includes an electric coil 60 .
- the electric coil 60 When the electric coil 60 is selectively energized, it provides the magnetic field of the electromagnet 32 . When the electric coil 60 is not energized, no magnetic field is produced, regardless of whether the plunger 54 and electromagnet 32 are in proximity.
- the electromagnet 32 is a permanent magnet which is enhanced by the electric coil 60 . When the electric coil 60 is energized, the strength of the resulting magnetic field is added to the strength of the permanent magnet. With this arrangement, the relative size of the electromagnet 32 and the electric coil 60 may be reduced while maintaining sufficient strength to overcome the biasing element 56 . Correspondingly, the power delivered to the electric coil 60 may be reduced.
- the electric coil 60 receives an activation command from a vehicle controller (not shown).
- the electromagnet 32 and biasing element 56 exert off-step opposing forces upon the plunger 54 due to normal rotation of the wheel rim 14 .
- the subsequent reciprocating motion of the plunger 54 causes air to be drawn into the pump body 52 through the air inlet 50 and then pumped into the inflatable tire 12 .
- the electric coil 60 is deactivated, and the plunger 54 returns to the open position.
- the configuration of the pump 30 may be implemented in ways other than those illustrated.
- the electromagnet 32 forces the plunger 54 into the open position, and the biasing element 56 returns the plunger 54 to the closed position.
- the radially outer portion 44 of the pump 30 further comprises a valve which allows air to enter the pump body 52 from the inflatable tire 12 when pressure within the inflatable tire 12 is excessive. Such a situation may arise due to ambient temperature changes.
- the activation of the electric coil 60 may be achieved using different methods.
- the electric coil 60 is activated by a controller.
- the electric coil 60 can be selectively activated by a vehicle operator from within the vehicle.
- the tire pressure at which the electric coil 60 is activated may be varied according to operator preference, tire specifications, and environmental conditions.
- the electric coil 60 will experience near-continuous activation.
- a feedback or other suitable detection arrangement capable of detecting such constant, or near constant, activation of the pump could be provided to notify the operator that such a leak is present.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
Abstract
Description
- The present invention relates to air-inflated tires of automotive vehicles. More specifically, the invention relates to an electromagnetically activated pump for inflating the tires on such vehicles.
- Tire pressure is one of the most important elements of drivability and safety on automotive vehicles. Insufficient tire pressure may cause excessive or uneven tread wear, decreased fuel efficiency, and poor traction. Although there are several common causes of improper tire pressure, most tires will lose air pressure on a day-to-day basis with normal use. Tires may lose up to and beyond one pound per square inch (psi) of air pressure per month.
- It is proper practice, therefore, for an automotive vehicle operator to check and maintain tire pressure periodically to ensure adequate performance. Although it is recommended that a vehicle operator check tire pressure on a regular basis, adequate maintenance does not always occur. Furthermore, even when tire pressure is properly monitored, problems may surface. It is possible for a tire to acquire a slow leak, which an inexperienced or inattentive operator may not notice. Additionally, changes in ambient air temperature throughout the day can result in a significant change in tire pressure.
- It is therefore desirable to provide a means for self-inflating a tire to counteract normal tire pressure loss. Some current self-inflating tire pumps rely on the centrifugal force created by tire rotation to initiate the action of the pump. However, such an approach to self-inflation is not available at all vehicle speeds, as such pumps are designed to be activated only when the centrifugal force exceeds a specific value. Furthermore, current self-inflation systems do not actually pump the needed air into the tire until the vehicle speed is reduced. The centrifugal force must return below the value needed for pump activation in order to initiate inflation.
- Additionally, some pumps utilize tire pressure monitoring (TPM) systems. TPM systems communicate tire pressure status to the vehicle operator through intra-vehicular means such as a dashboard light or indicator. Vehicles equipped with a TPM system are often further equipped with a device such as an on-board compressor to correct air pressure deficiencies. When the TPM system detects a low tire pressure signal, it relays the information to the on-board compressor system, which then operates to inflate the corresponding tire. Such compressor systems are large and bulky and can be expensive to implement.
- The present invention integrates a tire pump with the wheel rim of a vehicle. The pump is activated electromagnetically to automatically inflate the tire when tire pressure is below a required value.
- The pump extends from the atmosphere through the wheel rim and into the interior portion of the tire. The portion of the pump which is exposed to the atmosphere contains an air inlet for allowing air into the pump. A plunger within the pump operates to provide both opened and closed positions. In the open position, air from the atmosphere is allowed into the pump through the air inlet. When the plunger moves to the closed position, air is pushed through a valve into the inflatable portion of the tire.
- The plunger is forced into the open position by a biasing element. The biasing element retains the plunger in the open position until an electromagnet is activated. The electromagnet, which is located on a vehicular component in close proximity with the wheel rim, reacts against the plunger, which is a permanent magnet, forcing the plunger into the closed position. The electromagnet, which is activated upon receiving a low tire signal from the vehicle's body controller, reacts with the plunger when normal wheel rotation moves the pump within close proximity to the electromagnet. The biasing element returns the plunger to the open position when wheel rotation moves the pump out of the range of the electromagnet.
- Further areas of applicability of the present invention will become apparent from the detailed description provided hereinafter. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
- The present invention will become more fully understood from the detailed description and the accompanying drawings, wherein:
- FIG. 1 is a side view of a vehicle wheel employing the integrated air pump and mounted electromagnet of the present invention.
- FIG. 2 is a cross-section of the vehicle wheel of FIG. 1 employing the air pump and electromagnet of the present invention.
- FIG. 3 is a diagram showing the pump of the present invention with the piston in the open position.
- FIG. 4 is a diagram showing the pump in close proximity with the electromagnet, causing the piston to be in the closed position.
- Referring to FIG. 1 and FIG. 2, a
vehicle wheel 10 as is used for automotive vehicles includes aninflatable tire 12 which is mounted on awheel rim 14 having an innerannular surface 16 and an outerannular surface 18. Aninflatable region 20 is disposed between the outerannular surface 18 of thewheel rim 14 and the inner surface of theinflatable tire 12. Thewheel 10 is mounted on an automotive vehicle, bringing thewheel rim 14 in proximity with vehicle components such as thebrake rotor 22 and brake caliper support 24. - An electromagnetically activated
air pump 30 embodying the present invention is integrated with thewheel rim 14. Thepump 30 extends from the innerannular surface 16 to the outerannular surface 18. As described more fully below, thepump 30 interacts with anelectromagnet 32 mounted on the brake caliper support 24 to force air from the atmosphere through thewheel rim 14 and into theinflatable tire 12. - Referring to FIG. 2, a cross-section of the
vehicle wheel 10 mounted on avehicle axle 40 is shown. The radiallyinner portion 42 of thepump 30 is exposed to atmosphere. Thepump 30 passes through thewheel rim 14 and terminates with the radiallyouter portion 44 in fluid communication with the interior ofinflatable tire 12. Anelectromagnet 32 is mounted on a vehicular component within the perimeter defined by the innerannular surface 16 of thewheel rim 14. Although theelectromagnet 32 as shown is mounted on the brake caliper support 24, those skilled in the art will anticipate that theelectromagnet 32 may be mounted on other proximate vehicular components. Likewise, thepump 30 may be mounted elsewhere on the annular portion of thewheel rim 14. In one possible alternative arrangement, thepump 30 is mounted parallel to the axis of thewheel 10. In this arrangement, the centrifugal force created by tire rotation has a minimized effect on the performance of thepump 30. - As shown in FIG. 3, the
pump 30 includes anair inlet 50. Theair inlet 50 is disposed on the radiallyinner portion 42 of thepump body 52. Aplunger 54 having a magnet integrated therewith is disposed within thepump body 52. Theplunger 54 may be magnetic, or include a magnetic component fixedly attached thereto. Theplunger 54 is shown in the open position, which allows air from the atmosphere to enter thepump body 52 through theair inlet 50. Abiasing element 56 retains theplunger 54 in the open position. As shown, the biasingelement 56 is illustrated as a spring. In one possible alternative embodiment, the biasingelement 56 may be a permanent magnet disposed within thepump body 52 which retains themagnetic plunger 54 in the open position. Theair inlet 50 can be a one-way valve which allows air from the atmosphere through theair inlet 50 into thepump body 52, but prevents air from within thepump body 52 from entering the atmosphere. - Referring to FIG. 3 and FIG. 4, the radially
outer portion 44 communicates with theinflatable tire 12. Air within thepump body 52 is forced through the radiallyouter portion 44 as themagnetic plunger 54 moves into the closed position, as shown in FIG. 4. In the exemplary embodiment shown, the radiallyouter portion 44 includes a one-way valve 58 which allows air to enter theinflatable tire 12 but prevents air from entering thepump body 52 from theinflatable tire 12. The shape of theplunger 54 is substantially equivalent to that of thepump body 52 so as to allow theplunger 54 to reciprocate within thepump body 52. In one embodiment, theplunger 54 and thepump body 52 are cylindrical. - The
electromagnet 32 is fixedly located so that normal rotation of thewheel rim 14 will move thepump 30, and therefore themagnetic plunger 54, within proximity of theelectromagnet 32. When themagnetic plunger 54 is within a predetermined range of theelectromagnet 32, if theelectromagnet 32 is energized a force is exerted on theplunger 54 of sufficient strength to overcome the biasingelement 56, causing theplunger 54 to move to the closed position as shown in FIG. 4. When normal rotation of thewheel rim 14 moves theplunger 54 out of proximity with theelectromagnet 32, the resulting absence of magnetic force upon theplunger 54 from theelectromagnet 32 allows the biasingelement 56 to return theplunger 54 to the open position as shown in FIG. 3. - The
electromagnet 32 includes anelectric coil 60. When theelectric coil 60 is selectively energized, it provides the magnetic field of theelectromagnet 32. When theelectric coil 60 is not energized, no magnetic field is produced, regardless of whether theplunger 54 andelectromagnet 32 are in proximity. In an alternative embodiment, theelectromagnet 32 is a permanent magnet which is enhanced by theelectric coil 60. When theelectric coil 60 is energized, the strength of the resulting magnetic field is added to the strength of the permanent magnet. With this arrangement, the relative size of theelectromagnet 32 and theelectric coil 60 may be reduced while maintaining sufficient strength to overcome the biasingelement 56. Correspondingly, the power delivered to theelectric coil 60 may be reduced. - When pressure in the
inflatable tire 12 is low due to insufficient air such as detected by a tire pressure monitoring arrangement, theelectric coil 60 receives an activation command from a vehicle controller (not shown). When the coil is activated, theelectromagnet 32 and biasingelement 56 exert off-step opposing forces upon theplunger 54 due to normal rotation of thewheel rim 14. The subsequent reciprocating motion of theplunger 54 causes air to be drawn into thepump body 52 through theair inlet 50 and then pumped into theinflatable tire 12. When pressure within theinflatable tire 12 returns to a sufficient level, theelectric coil 60 is deactivated, and theplunger 54 returns to the open position. - It is to be understood that the configuration of the
pump 30 may be implemented in ways other than those illustrated. In one embodiment, theelectromagnet 32 forces theplunger 54 into the open position, and the biasingelement 56 returns theplunger 54 to the closed position. Alternatively, the radiallyouter portion 44 of thepump 30 further comprises a valve which allows air to enter thepump body 52 from theinflatable tire 12 when pressure within theinflatable tire 12 is excessive. Such a situation may arise due to ambient temperature changes. - It is also to be understood that the activation of the
electric coil 60 may be achieved using different methods. In one embodiment, theelectric coil 60 is activated by a controller. Alternatively, theelectric coil 60 can be selectively activated by a vehicle operator from within the vehicle. Additionally, the tire pressure at which theelectric coil 60 is activated may be varied according to operator preference, tire specifications, and environmental conditions. In the case of a leak in theinflatable tire 12, theelectric coil 60 will experience near-continuous activation. In this circumstance, a feedback or other suitable detection arrangement capable of detecting such constant, or near constant, activation of the pump could be provided to notify the operator that such a leak is present. - The description of the invention is merely exemplary in nature and, thus, variations that do not depart from the gist of the invention are intended to be within the scope of the invention. Such variations are not to be regarded as a departure from the spirit and scope of the invention.
Claims (24)
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US10/205,547 US6691754B1 (en) | 2002-07-24 | 2002-07-24 | Electromagnetically activated on-wheel air pump |
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US10/205,547 US6691754B1 (en) | 2002-07-24 | 2002-07-24 | Electromagnetically activated on-wheel air pump |
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US20040016492A1 true US20040016492A1 (en) | 2004-01-29 |
US6691754B1 US6691754B1 (en) | 2004-02-17 |
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US10/205,547 Expired - Lifetime US6691754B1 (en) | 2002-07-24 | 2002-07-24 | Electromagnetically activated on-wheel air pump |
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005007425A1 (en) * | 2003-03-27 | 2005-01-27 | Jansson Sven A | Air pressure control system and operation of air pump for vehicle tyres |
GB2434416A (en) * | 2006-01-19 | 2007-07-25 | Carlo B Chiarella | A container for a combustible substance |
EP1817180A2 (en) * | 2004-11-12 | 2007-08-15 | Richard Loewe | Tire pressure maintenance device |
US20080066533A1 (en) * | 2006-09-19 | 2008-03-20 | Beverly James A | Tire inflation method |
WO2010141638A1 (en) * | 2009-06-02 | 2010-12-09 | Czero, Inc. | Systems and methods for tire inflation and pressure regulation |
US20150158349A1 (en) * | 2013-12-09 | 2015-06-11 | The Goodyear Tire & Rubber Company | Compressor For A Self-Inflating Pneumatic Tire |
Families Citing this family (18)
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FR2834671B1 (en) * | 2002-01-11 | 2005-03-25 | Labinal | INFLATABLE WHEEL ASSEMBLY |
FR2835304B1 (en) * | 2002-01-29 | 2004-10-22 | Syegon | INFLATION AND DEFLATION VALVE FOR VEHICLE WHEEL |
US7784513B2 (en) * | 2004-11-12 | 2010-08-31 | Richard Thomas Loewe | Tire pressure maintenance device |
US8955566B2 (en) * | 2004-11-12 | 2015-02-17 | Richard Loewe | Tire pressure maintenance device |
US7690411B2 (en) * | 2007-02-22 | 2010-04-06 | Seth Wilson | Tire pressure control system |
IL183313A0 (en) * | 2007-05-20 | 2007-09-20 | Yuri Ginzburg | Tire inflation system |
WO2008144694A1 (en) * | 2007-05-21 | 2008-11-27 | Bol Stephen J | Wheel mounted pump for self-inflated tires |
WO2010129735A1 (en) | 2009-05-08 | 2010-11-11 | Kelly Steven J | Automatic tire pressurizing and maintaining system and method |
GB201010939D0 (en) * | 2010-06-29 | 2010-08-11 | Hall Gregory | Tyre assembly |
US8479791B2 (en) * | 2010-07-26 | 2013-07-09 | The Brothers Company | Automatic tire inflation system |
US9809066B2 (en) | 2014-05-05 | 2017-11-07 | The Goodyear Tire & Rubber Company | System for an air maintenance tire assembly |
US9744816B2 (en) | 2014-08-12 | 2017-08-29 | The Goodyear Tire & Rubber Company | Air maintenance tire |
US9783015B2 (en) | 2014-08-12 | 2017-10-10 | The Goodyear Tire & Rubber Company | Control regulator and pumping system for an air maintenance tire |
US9522577B2 (en) * | 2014-08-19 | 2016-12-20 | Hyundai America Technical Center, Inc | Dynamic tire air pressure system |
US10807422B2 (en) | 2016-12-22 | 2020-10-20 | The Goodyear Tire & Rubber Company | Inlet control valve for an air maintenance tire |
US11285764B2 (en) | 2016-12-22 | 2022-03-29 | The Goodyear Tire & Rubber Company | Control valve for an air maintenance tire |
US10759236B2 (en) | 2017-05-04 | 2020-09-01 | The Goodyear Tire & Rubber Company | Wheel for an air maintenance tire system |
CN112976960B (en) * | 2021-05-10 | 2021-08-20 | 新乡学院 | Double-beam cantilever crane with explosion-proof movable wheels |
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005007425A1 (en) * | 2003-03-27 | 2005-01-27 | Jansson Sven A | Air pressure control system and operation of air pump for vehicle tyres |
EP1817180A2 (en) * | 2004-11-12 | 2007-08-15 | Richard Loewe | Tire pressure maintenance device |
EP1817180A4 (en) * | 2004-11-12 | 2008-01-23 | Richard Loewe | Tire pressure maintenance device |
JP2008519735A (en) * | 2004-11-12 | 2008-06-12 | ロエベ、リチャード | Tire pressure maintenance device |
GB2434416A (en) * | 2006-01-19 | 2007-07-25 | Carlo B Chiarella | A container for a combustible substance |
US20080066533A1 (en) * | 2006-09-19 | 2008-03-20 | Beverly James A | Tire inflation method |
US7437920B2 (en) | 2006-09-19 | 2008-10-21 | Dana Heavy Vehicle Systems Group, Llc | Tire inflation method |
WO2010141638A1 (en) * | 2009-06-02 | 2010-12-09 | Czero, Inc. | Systems and methods for tire inflation and pressure regulation |
US20150158349A1 (en) * | 2013-12-09 | 2015-06-11 | The Goodyear Tire & Rubber Company | Compressor For A Self-Inflating Pneumatic Tire |
US9193226B2 (en) * | 2013-12-09 | 2015-11-24 | The Goodyear Tire & Rubber Company | Compressor for a self-inflating pneumatic tire |
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