Low tire pressure warning system
First Claim
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1. A low tire pressure warning system comprising:
- a tire pressure sensor constructed to be mounted within a tire on a wheel of a vehicle, the tire pressure sensor including a pressure switch coupled to a transmitter and a battery, and the pressure switch being constructed to connect the battery to the transmitter so as to activate the transmitter when pressure within the tire drops below a low value, the pressure switch and transmitter being located in a sensor enclosure with the pressure switch formed as an integral part of the sensor enclosure, the sensor enclosure hermetically sealed and internally pressurized to the low value;
a receiver constructed to be mounted within the vehicle in communication with the transmitter; and
a low tire pressure warning indicator coupled to the receiver so as to be activated when the receiver receives a signal from the transmitter.
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Abstract
A low tire pressure warning system includes a tire pressure sensor constructed to be mounted within each of the tires on the wheels of a vehicle. Each tire pressure sensor includes a pressure switch coupled to a transmitter and a battery, with the pressure switch being constructed to connect the battery to the transmitter so as to activate the transmitter when pressure within the tire drops below a low value. A receiver is constructed to be mounted within the vehicle in communication with the transmitters and a low tire pressure warning indicator is coupled to the receiver so as to be activated when the receiver receives a signal from any one of the transmitters.
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Citations
16 Claims
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1. A low tire pressure warning system comprising:
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a tire pressure sensor constructed to be mounted within a tire on a wheel of a vehicle, the tire pressure sensor including a pressure switch coupled to a transmitter and a battery, and the pressure switch being constructed to connect the battery to the transmitter so as to activate the transmitter when pressure within the tire drops below a low value, the pressure switch and transmitter being located in a sensor enclosure with the pressure switch formed as an integral part of the sensor enclosure, the sensor enclosure hermetically sealed and internally pressurized to the low value;
a receiver constructed to be mounted within the vehicle in communication with the transmitter; and
a low tire pressure warning indicator coupled to the receiver so as to be activated when the receiver receives a signal from the transmitter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A low tire pressure warning system comprising:
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a tire pressure sensor constructed to be mounted within a tire on a wheel of a vehicle, the tire pressure sensor including a pressure switch coupled to a transmitter and a battery, and the pressure switch being constructed to connect the battery to the transmitter so as to activate the transmitter when pressure within the tire drops below a low value;
the tire pressure sensor including an internally pressurized sensor enclosure enclosing the pressure switch, the transmitter, and the battery and forming a portion of the pressure switch, the pressure switch including an electrically conductive flexible wall of the enclosure, and a fixed electrical contact mounted adjacent the flexible wall within the sensor enclosure so as to disengage the electrically conductive flexible wall when pressure within the tire drops below the low value and connect the battery to the transmitter, the transmitter being mounted within the sensor enclosure;
a receiver constructed to be mounted within the vehicle in communication with the transmitter; and
a low tire pressure warning indicator coupled to the receiver so as to be activated when the receiver receives a signal from the transmitter. - View Dependent Claims (13, 14)
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15. A low tire pressure warning system comprising:
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a tire pressure sensor constructed to be mounted within a tire on a wheel of a vehicle, the tire pressure sensor including a pressure switch coupled to a transmitter and a battery, and the pressure switch being constructed to connect the battery to the transmitter so as to activate the transmitter when pressure within the tire drops below a low value, the transmitter includes an oscillator for producing a carrier and a pseudo random noise generator connected to the oscillator for modulating the carrier, the tire pressure sensor including an internally pressurized sensor enclosure enclosing the pressure switch, the transmitter, and the battery with an electrically conductive flexible wall, and a fixed electrical contact mounted adjacent the flexible wall within the sensor enclosure so as to form the pressure switch and disengage the electrically conductive flexible wall when pressure within the tire drops below the low value and connect the battery to the transmitter;
a receiver constructed to be mounted within the vehicle in communication with the transmitter for receiving the carrier, the receiver including a pseudo random noise generator similar to the pseudo random noise generator in the transmitter for decoding only valid pseudo random noise coded signals transmitted by the transmitter; and
a low tire pressure warning indicator coupled to the receiver so as to be activated when the receiver receives a signal from the transmitter. - View Dependent Claims (16)
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Specification
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Current AssigneeGregory H. Piesinger
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Original AssigneeGregory H. Piesinger
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InventorsPiesinger, Gregory H.
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Primary Examiner(s)Hofsass, Jeffrey A.
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Assistant Examiner(s)PHAM, TOAN NGOC
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Application NumberUS09/272,473Time in Patent Office669 DaysField of Search340/442, 340/447, 340/445, 340/446, 340/146.8, 731/462, 731/463, 731/464, 731/465, 116/34.R, 200/61.22US Class Current340/442CPC Class CodesB60C 23/0433 Radio signalsB60C 23/04985 using straps surrounding th...
