Measuring and testing – Tire – tread or roadway – Tire inflation testing installation
Patent
1998-12-15
2000-08-22
Oen, William
Measuring and testing
Tire, tread or roadway
Tire inflation testing installation
340442, B60C 2302
Patent
active
061054232
ABSTRACT:
A sensor is provided for detecting rotations of a pneumatic tire on a vehicle comprising two spaced apart mounting points for attachment to the radially inner surface of the tire tread region, a contact member between the mounting points for contacting the inner surface of the tread radius of the tire between the two mounting points and signal producing means comprising a piezo-electric device which is adapted to produce a signal when the contact member is moved radially of the tire relative to the two mounting points wherein damping means are provided so that a signal is generated when the movement occurs rapidly but slow movement generates no signal so that on rotation of the tire on a vehicle a signal is produced each time the tread region to which the sensor is attached becomes changed in radius at the contact patch of the tire but when the tread radius changes slowly when there is a pressure change in the tire and the movement is slow no signal is produced.
REFERENCES:
patent: 4067235 (1978-01-01), Markland et al.
patent: 5721528 (1998-02-01), Boesch et al.
patent: 5877679 (1999-03-01), Prottery
Aw-Musse Abdullahi
Oen William
Sumitomo Rubber Industries Limited
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