Air pressure detecting device for wheel

• US 20020060626A1
• Filed: 11/20/2001
• Published: 05/23/2002
• Est. Priority Date: 11/20/2000
• Status: Active Grant

• Current Assignee: Honda Giken Kogyo Kabushiki Kaisha (Honda Motor Company)
• Original Assignee: Honda Giken Kogyo Kabushiki Kaisha (Honda Motor Company)
• Inventors: Harada, Tomoyuki, Yamagiwa, Toshio, Bunya, Osamu
• Granted Patent: US 6,753,768 B2
• Time in Patent Office: Days
• US Class Current: 340/442
• CPC Class Codes: B60C 23/006 having two wheels only
• CPC Class Codes: B60C 23/0408 transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver
• CPC Class Codes: B60C 23/0494 Valve stem attachments positioned inside the tyre chamber

Abstract

An air pressure detecting device serves to detect the air pressure of a wheel of a vehicle which has a tire tube disposed in a tire, the air pressure detecting device is disposed between the tire tube and the rim of the wheel portion for detecting the air pressure of the tire. The air pressure detecting device has a pressure bearing plate held in contact with the outer surface of the tire tube, a pressure sensor for detecting a pressure of the pressure bearing plate, and a detecting and transmitting unit for detecting pressure information from the pressure sensor, converting the pressure information into an electric signal, and transmitting the electric signal as a radio wave. The pressure bearing plate, the pressure sensor, and the detecting and transmitting unit are superposed in the order named. The components including the pressure bearing plate, the pressure sensor, and the detecting and transmitting circuit can be installed without the need for a special modification of the tire tube and the rim. As a result, the cost of the air pressure detecting device can be reduced.

Claims

1. An air pressure detecting device for detecting air pressure of a tire of a vehicle comprising:

a wheel including a rim, a tire and a tire tube disposed within a tire; and

an air pressure detecting device being disposed between the tire tube and the rim of the wheel portion for detecting air pressure of the tire;

said air pressure detecting device being held in contact with an outer surface of said tire tube for detecting air pressure of the tire.

2. The air pressure detecting device according to claim 1, and further including a pressure bearing plate held in contact with the outer surface of said tire tube;

a pressure sensor for detecting a pressure of said pressure bearing plate; and

a detecting and transmitting circuit for detecting pressure information from the pressure sensor, converting the pressure information into an electrical signal, and transmitting the electrical signal as a radio wave, the pressure bearing plate, the pressure sensor, and the detecting and transmitting circuit being superposed in the order named.

3. The air pressure detecting device according to claim 2, and further including a case for positioning the pressure bearing plate, the pressure sensor, and the detecting and transmitting circuit superposed in the order named within the case.

4. The air pressure detecting device according to claim 3, and further including a threaded shaft mounted on said case for attaching said case to the rim of the wheel.

5. The air pressure detecting device according to claim 1, wherein said air pressure detecting device is flat and corresponds to the width of the rim of the wheel for mounting the air pressure detecting device adjacent to the outer surface of the tire tube.

6. An air pressure detecting device for detecting air pressure of a tire of a vehicle comprising:

a wheel including a rim, a tire and a tire tube disposed within a tire;

an air pressure detecting device being disposed between the tire tube and the rim of the wheel portion for detecting air pressure of the tire; and

a bead stopper for holding a bead of the tire adjacent to the air pressure detecting device;

said air pressure detecting device being held in contact with an outer surface of said tire tube for detecting air pressure of the tire.

7. The air pressure detecting device according to claim 6, and further including a pressure bearing plate held in contact with the outer surface of said tire tube;

a pressure sensor for detecting a pressure of said pressure bearing plate; and

a detecting and transmitting circuit for detecting pressure information from the pressure sensor, converting the pressure information into an electrical signal, and transmitting the electrical signal as a radio wave, the pressure bearing plate, the pressure sensor, the detecting and transmitting circuit and the bead stopper being superposed in the order named.

8. The air pressure detecting device according to claim 7, and further including a case for positioning the pressure bearing plate, the pressure sensor, and the detecting and transmitting circuit superposed in the order named within the case.

9. The air pressure detecting device according to claim 8, and further including a threaded shaft mounted on said case for attaching said case to the rim of the wheel.

10. An air pressure detecting device for detecting air pressure of a tire of a vehicle during operation of the vehicle comprising:

a wheel including a rim, a tire and a tire tube disposed within a tire; and

an air pressure detecting device being disposed between the tire tube and the rim of the wheel portion for detecting air pressure of the tire during operation of the vehicle;

said air pressure detecting device being held in contact with an outer surface of said tire tube for detecting air pressure of the tire during operation of the vehicle.

11. The air pressure detecting device according to claim 10, and further including a pressure bearing plate held in contact with the outer surface of said tire tube;

a pressure sensor for detecting a pressure of said pressure bearing plate; and

a detecting and transmitting circuit for detecting pressure information from the pressure sensor, converting the pressure information into an electrical signal, and transmitting the electrical signal as a radio wave, the pressure bearing plate, the pressure sensor, the detecting and transmitting circuit being superposed in the order named.

12. The air pressure detecting device according to claim 11, and further including a case for positioning the pressure bearing plate, the pressure sensor, and the detecting and transmitting circuit superposed in the order named within the case.

13. The air pressure detecting device according to claim 12, and further including a threaded shaft mounted on said case for attaching said case to the rim of the wheel.