Tire deflation detector
First Claim
1. A tire condition indicating device comprisinga detector for detecting the condition of a tire on a wheel of a vehicle rotatable about a wheel axis, a signal emitter emitting a signal when the detector detects the said condition,a counter connected to the emitter whereby the emitter can transmit a signal equivalent to the number of rotations that each wheel makes during a particular journey andpower supply means providing power to the signal emitter to emit the signal as aforesaid,wherein the power supply means comprises an electric power generator comprising first and second parts that are relatively rotatable about a generator axis, the first part being connected to the wheel to be rotated thereby.
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Abstract
The present invention provides a tire condition indicating device having a detector for detecting the condition of a tire on a wheel of a vehicle rotatable about a wheel axis, preferably for detecting pressure of the tire, a signal emitter emitting a signal when the detector detects the condition and power supply device providing power to the signal emitter the power supply device having an electric power generator including first and second parts that are relatively rotatable about a generator axis, the first part connected to the wheel to rotate.
55 Citations
20 Claims
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1. A tire condition indicating device comprising
a detector for detecting the condition of a tire on a wheel of a vehicle rotatable about a wheel axis, a signal emitter emitting a signal when the detector detects the said condition, a counter connected to the emitter whereby the emitter can transmit a signal equivalent to the number of rotations that each wheel makes during a particular journey and power supply means providing power to the signal emitter to emit the signal as aforesaid, wherein the power supply means comprises an electric power generator comprising first and second parts that are relatively rotatable about a generator axis, the first part being connected to the wheel to be rotated thereby.
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3. A tire condition indicating device comprising
a detector for detecting the condition of a tire on a wheel of a vehicle rotatable about a wheel axis, a signal emitter emitting a signal when the detector detects the said condition, power supply means providing power to the signal emitter to emit the signal as aforesaid, said power supply means comprising an electric power generator having an axis which is coincident with the wheel axis, the generator comprising: -
a first part rotatable with the wheel, and a second part that is relatively rotatable to the first part about the generator axis, the second part being rotatably carried by the wheel and being attached to an offset weight which tends to hold the second part stationary when the wheel rotates; wherein the offset weight comprises a cross plate and a mass member, the cross plate being attached to the second part, the cross plate being rotatable about its centre, through which the generator axis passes, and the mass member being carried by the cross plate eccentrically of the generator axis. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification