Patent ID: 7919907

Claim:
A circuit module configured for use in a vehicle tire, comprising: a housing; a piezoelectric generator including: a spring device, including an interconnected spring element and piezoelectric element; and a mass element, the mass element being configured to be movable within the housing; and a current-supply circuit configured for receiving a piezoelectric voltage output by the piezoelectric element in response to a mechanical deformation of the piezoelectric element and for supplying power to the circuit module; wherein: the mass element and the spring device form an oscillatory system, the piezoelectric element being elastically deformable in response to an oscillation of the oscillatory system; the spring element: is secured in the housing; and includes: end regions which are clamped in the housing; at least one mass contact region for making contact with the mass element; and two tongue-like, radially outwardly protruding, elastic spring regions; and the piezoelectric element: is affixed to the two elastic spring regions for executing a flexural oscillation; and executes a bending action in response to an elastic deformation of at least one of the two elastic spring regions.