Device for monitoring the pressure of a vehicle tire

An apparatus for monitoring a pressure of a vehicle tire comprising

• a pressure inlet port connectable to an interior of a tire;
• a first valve device having an inlet port, a control inlet port, an outlet port and a discharge port, wherein the inlet port of the valve device is connected to the pressure inlet port, wherein the control inlet port is connected to the pressure inlet port for actuating the valve device depending on the pressure present at the pressure inlet port, wherein the valve device transmits the pressure present at the pressure inlet port to the outlet port in a first switching position of the valve device in a situation where the pressure at the pressure inlet port is at a predetermined pressure or above the predetermined pressure, wherein the valve device separates the pressure present at the pressure inlet port from the outlet port in a second switching position of the valve device in a situation where the pressure present at the pressure inlet port has dropped to below the predetermined pressure and wherein the valve device connects the outlet port through the discharge port to the atmosphere in the second switching position of the valve device;
• an actuator connected to the outlet port of the valve device and actuatable by the pressure present at the outlet port, wherein the actuator is subjected to a restoring force, and wherein the restoring force opposes the pressure present at the outlet port and transmitted to the actuator, and wherein the actuator assumes a first positional value corresponding to a first switching position of the valve device, and wherein the actuator assumes a second positional value corresponding to the second switching position of the valve device, and wherein a transition of the actuator from the first positional value to the second positional value indicates a drop of the pressure present in the pressure inlet port.

An apparatus for a monitoring of a pressure of a vehicle tire, including the following features:

• a pressure sensitive device for scanning the tire pressure is furnished at a vehicle wheel, where the tire pressure sensitive device includes a pressure inlet port and wherein the pressure inlet port is connected to the tire;
• an actuator is furnished, which can be subjected to the tire pressure against a restoring force, where the actuator serves for the generation of a regulating distance (S), indicating a tire pressure drop;
• a valve device (7) is disposed between the pressure inlet port (2) and the actuator (4) and the valve device (7) is actuatable with the tire pressure, wherein the valve device (7) includes a control inlet port (8) and wherein the control inlet port (8) is subjectable to the tire pressure;
• wherein the valve device (7) serves in a first switching position at a predetermined or above a predetermined tire pressure to connect the pressure inlet port (2) to the actuator (4);
• wherein the valve device (7) serves in a second switching position below the predetermined tire pressure to separate the pressure inlet port (2) from the actuator (4) and to connect the actuator (4) through a discharge port (9) to the atmosphere.

An apparatus for a monitoring of a pressure of vehicle tires, comprising:

• a pressure sensitive device (1) for scanning the tire pressure and furnished at a vehicle wheel, where the pressure sensitive device (1) includes a first pressure inlet port (2), and wherein the first pressure inlet port (2) is connected to the first vehicle tire (3);
• an actuator (4), wherein the actuator is subjected to the tire pressure against a restoring force, and wherein the actuator serves for generating a regulating distance (S) indicating a tire pressure drop;
• a first valve device (7), serving in a first switching position at a predetermined or above a predetermined tire pressure to connect the first pressure inlet port (2) to the actuator (4),
• wherein the first valve device (7) serves in a second switching position below the predetermined tire pressure to separate the first pressure inlet port (2) from the actuator (4) and to connect the actuator (4) through a discharge port (9) to the atmosphere;
• a second pressure inlet port (15) for monitoring the pressure of a second vehicle tire (16), wherein the second pressure inlet port (15) is subjected to the pressure of a second vehicle tire (16), and wherein the second pressure inlet port (15) is connected to the first pressure inlet port (2) of the first tire (3) via a pressure line (17);
• a second valve device (18) actuatable by the actuator (4) generating the regulating distance (S), wherein the second valve device (18) is disposed in the pressure line (17) and serves for connecting and separating the first pressure inlet port (2) and the second pressure inlet port (15), wherein the second valve device (18), actuatable by the actuator (4), serves in a first switching position at a predetermined tire pressure and above the predetermined tire pressure to connect the first pressure inlet port (2) and the second pressure inlet port (15), and below a predetermined tire pressure to separate the pressure inlet port (2) from the pressure inlet port (15).

An apparatus for a monitoring of a pressure of vehicle tires, comprising:

• a pressure sensitive device for scanning a tire pressure and furnished at a vehicle wheel, where the pressure sensitive device includes a first pressure inlet port, and wherein the first pressure inlet port is connected to the first tire;
• a first valve device connected to the first pressure inlet port and serving to provide, in a first switching position at a predetermined or above a predetermined tire pressure, an open connection to the first pressure inlet port, and in a second switching below the predetermined tire pressure position a closing of the connection to the first pressure inlet port;
• an actuator connected to the first valve device, wherein the actuator is subjected to the tire pressure when the first valve device provides an open connection and against a restoring force, and wherein the actuator serves for generating a regulating distance indicating a tire pressure drop, and wherein the first valve device serves in the second switching position below the predetermined tire pressure to separate the first pressure inlet port from the actuator and to connect the actuator through a discharge port to the atmosphere;
• a second pressure inlet port to be connected to a second vehicle tire and for monitoring a pressure of a second vehicle tire, wherein the second pressure inlet port is subjected to the pressure of the second vehicle tire;
• a pressure line connecting the second pressure inlet port to the first pressure inlet port of the first vehicle tire;
• a second valve device disposed in the pressure line and actuatable by the actuator generating the regulating distance, wherein the second valve device serves for connecting and separating the first pressure inlet port and the second pressure inlet port,
• wherein the second valve device is actuatable by the actuator into a first switching position and into a second switching position, wherein the second valve device serves in a first switching position at a predetermined or above the predetermined tire pressure to connect the first pressure inlet port and the second pressure inlet port, and wherein the second valve device serves below a predetermined tire pressure to separate the first pressure inlet port from the second pressure inlet port.