Patent ID: 7124789

Claim:
An automatic air supply mechanism for a pneumatic tire for automatically supplying air into a pneumatic tire mounted on a wheel body rotatable with respect to an axle, comprising: an air feeding section provided on a wheel and connected to said pneumatic tire in air flow communication for feeding air into said pneumatic tire, said air feeding section being provided with a compression section which can compress air when said wheel body is rotated with respect to said axle, wherein said compression section is parovided with a compression chamber which can take in air from the outside and a compression operation means for performing operations to compress air in said compression chamber when said wheel body is rotated with respect to said axel, wherein said compression operation means has a pressing section provided on said axle and compression operation body for performing operations to compress air in said compression chamber, wherein air in said compression chamber is subjected to compression operations when said compression operation body is brought into contact with said pressing section and pressed there against by rotation of said wheel body with respect to said axle, wherein said compression chamber is secured to a hub provided on a wheel body for a two-wheeler, wherein said pressing section is secured to an axle for a two-wheeler, and wherein air in said compression chamber is subjected to compression operations when said compression operation body is brought into contact with said pressing section and pressed thereagainst by rotation of said wheel body with respect to said axle.