Tire air pressure monitoring device and pneumatic tire having the tire air pressure monitoring device
First Claim
1. A tire air pressure monitoring device having a sensor which detects a physical quantity relating to tire air pressure, and a transmitter which sends signals detected by the sensor, wherein the sensor is a sound pressure level sensor which detects a sound pressure level inside a tire cavity filled with air, the transmitter being enabled to send the signals only when the sound pressure level detected by the sound pressure level sensor is changed.
2 Assignments
0 Petitions
Accused Products
Abstract
A tire air pressure monitoring device includes a sensor which detects a physical quantity relating to tire air pressure, and a transmitter which sends signals detected by the sensor. The sensor is a sound pressure level sensor which detects a sound pressure level inside a tire cavity filled with air. The transmitter is enabled to send the signals only when the sound pressure level detected by the sound pressure level sensor is changed.
7 Citations
10 Claims
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1. A tire air pressure monitoring device having a sensor which detects a physical quantity relating to tire air pressure, and a transmitter which sends signals detected by the sensor,
wherein the sensor is a sound pressure level sensor which detects a sound pressure level inside a tire cavity filled with air, the transmitter being enabled to send the signals only when the sound pressure level detected by the sound pressure level sensor is changed.
- 6. A pneumatic tire having a tire air pressure monitoring device in a cavity of the tire, the tire air pressure monitoring device having a sensor which detects a physical quantity relating to tire air pressure, and a transmitter which sends signals detected by the sensor, the sensor being a sound pressure level sensor which detects a sound pressure level inside a tire cavity filled with air, the transmitter being enabled to send the signals only when the sound pressure level detected by the sound pressure level sensor is changed.
Specification