| 摘要 |
A tyre fault device comprises a fault warning means (1) to be coupled or incorporated in a tyre valve. The fault warning means includes, in the foot part of the valve, switch means (4, 7) responsive to pressure and/or temperature conditions and radio signal means (10, 8c) to transmit a signal for reception by receiver means (2). Said switch means (4, 7) are housed in a chamber (12) including a wall (12a) which moves in response to changing pressure and/or temperature conditions and comprises a convex disc of bimetal material. A battery (9) may be housed in a removable cap (8) and provide power via electrical leads (21A, 21B) to the radio signal means (10, 8c) incorporated in the valve body (16). |
