Indicating device, especially for indicating the state of pressu

Details Indicating device, especially for indicating the state of pressu Indicating device, especially for indicating the state of pressu

1993-03-23

1994-05-31

Chilcot, Jr., Richard E.

Measuring and testing

Tire, tread or roadway

Tire inflation testing installation

336 30, B60C 2302

Patent

active

053158660

ABSTRACT:
The invention relates to an indicating device, especially for indicating the state of pressure of a tire, of the type that can be fixed to a wheel. The device includes: a mechanism (7) for measuring the pressure of the tire (2); a transducer/transmitter (8) which converts the measured magnitude of the pressure into an electrical signal and transmits the electrical signal to an electronic unit; and a source of electrical power (12, 13) for the transducer/transmitter (8). In order to make the device not only more practical and operationally reliable but also less expensive, the device provides an electrical power source, the power source consists of an inductive current generator formed by a rotor (12) which is fixed coaxially to the wheel so as to rotate as one piece therewith, and by a coaxial stator (13) which is freely rotatable with respect to the rotor (12) and is provided with a counterweight (14),capable of keeping the stator (13) essentially motionless with respect to the rotor (12) as the rotor rotates with the wheel.

REFERENCES:
patent: 4450716 (1984-05-01), Lefaucheux et al.
patent: 4742712 (1988-05-01), Kokubu
patent: 5190247 (1993-03-01), Le Chatelier

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