Tire low pressure audio warning device
First Claim
1. A tire low pressure audio warning device comprising:
- a body attachable to a valve stem or an opening in a rim of a tire, or to a valve stem on an inner tube contained therein, said body being in air communications with pressurized air within said tire;
a low pressure monitoring device contained within said body to monitor air pressure within said tire, said low pressure monitoring device being in air communication with pressurized air coming from said tire, said low pressure monitoring device having electrical contacts that close when a predetermined low pressure condition exists within said tire and remains opens when air pressure remains above said predetermined low pressure;
an audio alarm contained within said body and electrically connected to one of said electrical contacts in said low pressure monitoring device, said audio alarm activated by said low pressure monitoring device when said electrical contacts close; and
a battery contained within said body to provide electric power for said audio alarm, with an electric circuit to electrically connect said battery to said audio alarm and said low pressure monitoring device as appropriate.
1 Assignment
0 Petitions
Accused Products
Abstract
A tire low pressure audio warning device for monitoring a tire for low air pressure and sounding an alarm when a low tire pressure condition exists. The tire low pressure audio warning device has a body that attaches to a valve stem of an inner tube or tubeless tire, or to an opening through a rim of the tire. Contained within the body is at least a low air pressure switch, a battery and an audio alarm. The low pressure switch is in air communications with the pressurized air within the tire or the inner tube. The audio alarm is electrically connected to and activated by the low air pressure switch when a low tire pressure exits. A centrifugal switch is provided within the body to prevent the audio alarm from sounding during tire rotation. The centrifugal switch opens when the tire is rotating, and closes when tire rotation is stopped. The battery within the body provides electrical power for the alarm. The alarm is easily heard by a driver, or any one else, when walking past the tire, when the vehicle is stopped or parked. The low pressure setting can be factory set or it can be of an adjustable type. The monitoring device can be used on all tires inflated with air or other gasses.
28 Citations
17 Claims
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1. A tire low pressure audio warning device comprising:
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a body attachable to a valve stem or an opening in a rim of a tire, or to a valve stem on an inner tube contained therein, said body being in air communications with pressurized air within said tire;
a low pressure monitoring device contained within said body to monitor air pressure within said tire, said low pressure monitoring device being in air communication with pressurized air coming from said tire, said low pressure monitoring device having electrical contacts that close when a predetermined low pressure condition exists within said tire and remains opens when air pressure remains above said predetermined low pressure;
an audio alarm contained within said body and electrically connected to one of said electrical contacts in said low pressure monitoring device, said audio alarm activated by said low pressure monitoring device when said electrical contacts close; and
a battery contained within said body to provide electric power for said audio alarm, with an electric circuit to electrically connect said battery to said audio alarm and said low pressure monitoring device as appropriate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A tire low pressure audio warning device comprising:
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a body attachable to a tire, a valve stem, or a rim of a tire said body being in air communications with pressurized air within said tire or an inner tube within said tire;
a pressure monitoring device contained within said body to monitor air pressure within said tire;
electrical contacts contained within said body and operated by said low pressure monitoring device, said electrical contacts being closed when a low pressure condition exists within said tire and remaining open when normal air pressure is within said tire;
an audio alarm contained within said body and electrically connected to said electrical contacts, said audio alarm being a buzzer that is activated when said electrical contacts are closed;
a centrifugal switch contained within said body which is electrically open when a tire is in motion or rotating, and electrically closed when tire rotation is stopped, said centrifugal switch preventing said audio alarm activation when said tire is rotating;
a battery to provide electrical power for said audio alarm; and
an electrical circuit to electrically connect said electrical contacts, said audio alarm, said centrifugal switch, and said battery. - View Dependent Claims (13, 14, 15, 16)
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17. A tire low pressure audio warning device comprising:
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a body attachable to a valve stem or an opening in a rim of a tire, or to a valve stem on an inner tube contained therein, said body being in air communication with pressurized air within said tire;
a battery contained within said body;
a pressure monitoring switch contained within said body and in air communications with said pressurized air in said tire via said body, said pressure monitoring switch closing when a low tire air pressure condition exists within said tire, said pressure monitoring switch being electrically connected to one side of said battery;
a buzzer contained within said body that is activated when said pressure monitoring device electrically closes, said buzzer creating an audio alarm when activated, said buzzer being electrically connected to said battery and said pressure monitoring switch in a series connection to complete an electrical circuit.
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Specification