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| Number | Title | Issue Date |
| 7926530 | Device for generating tire air pressure A tire-air-pressure-generating apparatus includes an air pump, a pressure control valve, and an adjustment device, which are disposed coaxially in a shaft portion of an axle hub. The air pump includes a pump chamber located in the interior of the axle hub. The press... | 04/19/2011 |
| 7784513 | Tire pressure maintenance device A device for maintaining a desired inflation pressure within a tire mounted on a wheel of a vehicle which includes a microcompressor having a flexible compression chamber and a magnetic element not on the wheel. As the compressor passes the magnet each wheel revolut... | 08/31/2010 |
| 7748422 | Wheel mounted pump for self-inflating tires An air pump, mounted on a wheel, which pumps ambient air into the tire chamber to automatically pump up the tire as the wheel rotates. The air pump generally comprises a cylinder and a piston, which relatively reciprocate to effect an intake stroke and a compression... | 07/06/2010 |
| 7607465 | Tire pressure maintenance device A device is provided for maintaining a desired inflation pressure within a tire mounted on a wheel of a vehicle. The device includes a microcompressor and a magnetic element. The compressor is mounted on the wheel and is in fluid communication with the atmosphere an... | 10/27/2009 |
| 7357164 | Tire pressure maintenance system A device is provided for maintaining a desired inflation pressure within a tire mounted on a wheel of a vehicle. The device includes a microcompressor and a magnetic element. The compressor is mounted on the wheel and is in fluid communication with the atmosphere an... | 04/15/2008 |
| 7322392 | Tire pump A tire pump includes a passive air pump which is attachable to a component of a vehicle wheel assembly. The vehicle wheel assembly has a vehicle wheel, a tire valve stem attached to the vehicle wheel, and a tire mounted on the vehicle wheel and containing a gas. The... | 01/29/2008 |
| 7314072 | Integral pressure regulation system for tires and other vessels containing compressible fluids An inflation and pressure regulation system for inflatable vessels, such as tires, has a main chamber containing a volume of compressible fluid, such as air, and a pump chamber which acts to maintain the fluid in the vessel at a desired pressure. The pump chamber ha... | 01/01/2008 |
| 7284585 | Wheel assembly, wheel and wheel condition determining apparatus An air pressure inside a tire is positively adjusted to an optimum state. In a wheel assembly, a tire is attached to a wheel. A pressurizing means is provided in the wheel assembly for pressurizing air inside the tire. A depressurizing means is also provided in the ... | 10/23/2007 |
| 7237590 | Tire pressure maintenance device A device is provided for maintaining a desired inflation pressure within a tire mounted on a wheel of a vehicle. The device includes a microcompressor and a magnetic element. The compressor is mounted on the wheel and is in fluid communication with the atmosphere an... | 07/03/2007 |
| 7225845 | Arrangement for filling air into a rotating pneumatic tire A hose-type structure is arranged essentially between the tire and the rim, which structure is connected at the end side with the environment and, by way of a valve, with the interior of the tire. The hose-type structure fills the tire during its rotating movement, ... | 06/05/2007 |
| 7117910 | Air supply device, wheel, and tire unit An air supply device is provided on a rotating body having an air filling portion into which air is filled. The air supply device has a device body provided with a cylinder, and a piston mounted movably in the cylinder, the device body being joined at the middle of ... | 10/10/2006 |
| 7051778 | Device and method for generating energy in a rolling wheel A device for generating energy in a rolling wheel includes one part that can move with respect to a wheel rim. The one part is engaged with elastic portion that keeps it in contact with a predetermined bead portion of a tire. The one part undergoes reciprocating out... | 05/30/2006 |
| 7004019 | Method and system for the detection of a pressure drop in a tire A system for the detection of a pressure drop in a tire comprising a tire air pressure sensor, a tire temperature sensor and an evaluating unit. The evaluating unit converts the measured air pressure values and temperature values into temperature compensated air pre... | 02/28/2006 |
| 6994136 | Wheel end tire air pump A wheel end assembly includes a self-contained air pump mechanism that maintains tire pressure at a desired level. The pump mechanism includes a piston and cylinder assembly that rotate with the tire. A linkage assembly drives the piston within the cylinder as the w... | 02/07/2006 |
| 6921197 | Method and system for measuring temperature and monitoring vehicle tire operation, and vehicle tire and method for introducing a temperature sensor into a vehicle tire A vehicle tire is provided that contains at least one temperature sensor embedded in the tire in a critical location, and a transmission unit for transferring the output signal of the temperature sensor to a location externally of the vehicle tire. A method is also ... | 07/26/2005 |
| 6691754 | Electromagnetically activated on-wheel air pump The present invention couples a tire pump with the wheel rim of a vehicle. The pump is activated electromagnetically to inflate the tire as desired, e.g. when tire pressure is below a required value. The pump is arranged to draw air from the atmosphere an... | 02/17/2004 |
| 6533010 | Air regulating system for wheels An air pressure regulating system mounted within a wheel and tire assembly. It primarily includes a temperature sensor and a compressor assembly having a compression chamber and valves. Utilizing centrifugal forces from the rotation of a wheel and tire as... | 03/18/2003 |
| 5975174 | Rim mountable tire inflation maintenance device A device for maintaining inflation pressure within a tire interior of a tire mounted on a rotating wheel with a rim. The device includes a compressor with piston penetrateably mountable on the wheel rim or in communication with a valve stem that incorpora... | 11/02/1999 |
| 5505080 | Tire pressure management system A tire pressure management system including a tire condition monitor connected to the tire so as to be interactive with air pressure in the tire and for selectively measuring a pressure in the tire, a controller, and a display. The tire condition monitor ... | 04/09/1996 |
| 5325902 | Automatic tire pressure monitor and inflation system A device for maintaining a desired inflation pressure within the tire utilizes a motor and air compressor disposed upon the rotating wheel to eliminate the requirement for a rotary pneumatic joint. The air compressor provides a source of air for maintaini... | 07/05/1994 |
| 4922984 | Inflation and deflation of a tire in rotation To assure inflation of a tire 2 during its rotation, a hose 3 is placed on he inside periphery of rim 1. A pressure roller 5, solid with the wheel carrier and therefore non-rotatable, causes a local reduction in the section of hose 3. During rotation of ti... | 05/08/1990 |
| 4840212 | Automatic air pump for wheel tires A automatic air pump for car wheel tires, especially those without tubes, utilizes an air piston with a cylinder fixed on a rim which enables its piston plate to contact and be pushed by the interior tire surface successively by the wheel rotation compres... | 06/20/1989 |
