Tire pressure monitoring system

• US 9,956,832 B2
• Filed: 03/18/2012
• Issued: 05/01/2018
• Est. Priority Date: 03/18/2011
• Status: Active Grant

• Current Assignee: Torbjorn Lundqvist
• Original Assignee: Torbjorn Lundqvist
• Inventors: Lundqvist, Torbjrn
• Primary Examiner(s): Nguyen, Phung
• Application Number:
  US14/005,904
• Publication Number:
  US 20140043154A1
• Time in Patent Office: 2,235 Days
• Field of Search: 340447, 340445, 340442, 152415, 1371163, 137224
• CPC Class Codes: B60C 23/007 having multiple wheels arranged side by side
• CPC Class Codes: B60C 23/0406 Alarms noticeable from outside the vehicle, e.g. indication in side mirror, front light or audible alarms B60C23/0403, B60C23/0405 take precedence
• CPC Class Codes: B60C 23/0433 Radio signals
• CPC Class Codes: B60C 23/0498 for rim attachments B60C23/0494, B60C23/0496 take precedence
• CPC Class Codes: B60C 29/064 Hose connections for pneumatic tyres, e.g. to spare wheels

Abstract

The invention comprises a tire pressure monitoring system. One system comprises a tire pressure monitor that signals to a user with audio alarm and visual alarm. Another component is the use of a tire air pressure balancing device with a safety trigger to ensure that dual tire systems share air but that stop sharing air in the case of rapid air pressure drop as in cases of tire blow out.

Claims

1. A tire pressure monitoring system comprising a tire pressure sensor and a transmitter for sending an RF signal to a receiver when a tire pressure drops below a predefined pressure differential;

the tire pressure sensor is mounted on an axle or an axle hub more than ten centimeters from a valve stem on a tire; and

wherein the tire pressure sensor is insensitive to changes in ambient air temperature surrounding the tire, and when ambient temperature drops, both the predefined pressure differential in a pressure chamber of the tire and the tire pressure drop equally.

2. The tire pressure monitoring system of claim 1, wherein the pressure sensor is made of a membrane that continuously monitors pressure but only sends an alarm when the tire pressure drops below a predefined pressure differential by closing an electrical circuit.

3. The tire pressure monitoring system of claim 2, wherein the pressure sensor battery can be exchanged with a fresh battery without having to remove the tire or the sensor from the sensor mount.

4. The tire pressure monitoring system of claim 1, wherein the pressure sensor measures tire pressure at ambient temperature.

5. The tire pressure monitoring system of claim 1, wherein the pressure sensor is in a housing body.

6. The tire pressure monitoring system of claim 1, further comprising an LED that flashes when the tire pressure drops below the predefined pressure differential.

7. The tire pressure monitoring system of claim 1, wherein the receiver has an LED or speaker for signaling that the tire pressure dropped below a predefined pressure differential.

8. The tire pressure monitoring system of claim 1, wherein the predefined pressure differential is between 3 psi and 10 psi.

9. A tire pressure monitoring system comprising the tire pressure sensor, a tire pressure sharing channel and a transmitter for sending an RF signal to a receiver when a tire pressure drops below a predefined pressure differential and a safety trigger wherein the tire pressure drops below a lower predefined pressure the safety trigger stops air from flowing in the channel.