Device for monitoring the pressure of a measurement chamber charged with the pressure of a vehicle tire

A device for monitoring the pressure of a measurement chamber subjected to the pressure of a vehicle tire comprising

• a cylindrical valve body forming a valve device and controllable dependent on the pressure in the pressure measurement chamber;
• a piston-shaped extension having a piston face and coaxially attached to a first axial end of the valve body, wherein the piston-shaped extension is set in motion in case of a pressure drop in the pressure measurement chamber for actuation of the valve device;
• a transducing extension forming a second axial end of the valve body, wherein the cylindrical valve body, the piston-shaped extension, and the transducing extension together form an auxiliary actuator;
• a pressure measurement member, disposed and structured such that the pressure measurement member engages the piston-shaped extension of the auxiliary actuator for an auxiliary generation of a regulating distance and for controlling and actuating the valve device;
• a pressure measurement chamber defined by a volume space adjoining a middle section of an outside surface of the valve body, adjoining the piston face of the piston-shaped extension, and disposed such as to subject the piston-shaped extension to the pressure in the measurement chamber;
• a transducing member engaged by the transducing extension, whereby the pressure measurement member acts, in case of a pressure drop, mechanically onto the piston-shaped extension;
• a restoring force member engaging the transducer member;
• an actuator associated with the transducing member for generating a regulating distance indicating a pressure drop in the measurement chamber, wherein the actuator is actuated by a pressure of the measurement chamber against a force of the restoring force member.

A device for monitoring the pressure of a measurement chamber subjected to the pressure of a vehicle tire comprising

• an actuator for generating a signal indicating a pressure drop in a measurement chamber, wherein the actuator is actuated against a restoring force of a first spring based on the pressure in the measurement chamber;
• a valve device disposed within the measurement chamber and controlled dependent on the pressure in the measurement chamber, wherein the actuator is connected to the measurement chamber in case of a pressure drop through actuation of the valve device;
• a second spring engaging the valve device for control and actuation of said valve device and thereby subjected to the pressure in the measurement chamber;
• the improvement comprising
• an auxiliary actuator including a section, serving also as a valve body of the valve device, a piston-shaped extension, and an extension piece, wherein the second spring is disposed and structured to act on the piston-shaped extension of the auxiliary actuator, wherein the auxiliary actuator serves for an auxiliary generation of a path distance and, in case of a pressure drop, acts mechanically onto the actuator against the restoring force of the first spring or in the same direction onto a transfer mechanism actuable by the actuator.