| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent ingress of any foreign matters from a cavity part of a pneumatic tire to a tire state acquisition device casing through a communication hole. <P>SOLUTION: A tire state acquisition device 20 is arranged in a cavity part of a pneumatic tire to acquire the tire state quantity. Further, the tire state acquisition device 20 includes a casing 26 having a communication hole R for communicating inner and outer parts thereof, and a valve element 27 for opening/closing the communication hole R. The valve element 27 is formed of a flexible member, and is closed to close the communication hole R when the pneumatic tire is in a static condition, while the valve element is deflected by the centrifugal force and is opened when the pneumatic tire is rotated. <P>COPYRIGHT: (C)2013,JPO&INPIT |
