Patent ID: 8714002

Claim:
A device ( 51 ) for monitoring the state of inflation of vehicle wheel tyres, the wheels comprising a rim ( 100 ) and a respective tyre ( 101 ) delimiting a hollow space ( 103 ) inside the wheel from the outside environment ( 104 ), the device ( 51 ) comprising: a first end ( 53 ) equipped with a self-closing valve connectable to means for inflating and deflating the tyre ( 101 ); a second end ( 99 ) sealingly connectable on a hole ( 102 ) in the rim ( 100 ) of the wheel; a cavity ( 62 ) interposed between the two ends ( 53 ) and ( 99 ) and sealingly delimited by a wall ( 81 ) which is integral with a body ( 52 ) of the device and by an elastically deformable partition ( 203 ) having an inside face subjected to the pressure inside the tyre and an outside face subjected to the atmospheric pressure of the outside environment, characterized in that it, comprises: means ( 221 ) for generating and transmitting electromagnetic signals and a power source ( 215 ); a switch ( 208 ) mounted in the cavity ( 62 ) and configured to drive the means ( 221 ) for generating and transmitting electromagnetic signals, where the deformable partition ( 203 ) comprises a contact element ( 222 ) operating on the switch ( 208 ) in such a way as to activate it in response to a deformation of the partition ( 203 ) itself.