Resilient tires and wheels – Tires – resilient – Inflating devices
Patent
1992-10-06
1994-07-05
Ball, Michael W.
Resilient tires and wheels
Tires, resilient
Inflating devices
340443, 200 6122, 200 6125, B60C 2300
Patent
active
053259017
ABSTRACT:
A tire air pressure sensor is mounted on a vehicle wheel and includes an inertial mass which is urged radially outwardly by centrifugal force resulting from rotation of the wheel. The tire air pressure is applied to the inertial mass in opposition to the centrifugal force. When the rotational speed of the wheel is sufficient that the centrifugal force overcomes the applied air pressure, the inertial mass moves radially outwardly and opens a switch. The speed at which the switch opens is a predetermined function of the tire pressure. In another embodiment, a second sensor is provided to sense when the tire pressure is below a minimum value. A spring urges an inertial mass inwardly in opposition to the centrifugal force, and the tire pressure is applied to a bellows having an end which moves radially outwardly in proportion to the applied pressure. The bellows opens a first switch when the pressure is higher than the minimum value, and the inertial mass moves radially outwardly away from the end of the bellows to open a second switch when the wheel speed exceeds the value corresponding to the tire pressure.
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patent: 5134880 (1992-08-01), Gerhard
EPIC Technologies, Inc. brochure, "Technical Description EPIC Low Tire Warning System", published at least as early as Jul. 1990.
Olney Ross D.
Reeds John W.
Ball Michael W.
Denson-Low W. K.
Duraiswamy V. D.
Hughes Aircraft Company
Lorin Francis J.
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