Tire pressure sensor

• US 20080314135A1
• Filed: 07/24/2007
• Published: 12/25/2008
• Est. Priority Date: 06/21/2007
• Status: Active Grant

• Current Assignee: Mobiletron Electronics Co. Ltd.
• Original Assignee: Mobiletron Electronics Co. Ltd.
• Inventors: Liao, Ming-Kuan
• Granted Patent: US 7,654,136 B2
• Time in Patent Office: Days
• US Class Current: 73/146.5
• CPC Class Codes: B60C 23/0408 transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver
• CPC Class Codes: B60C 23/0496 Valve stem attachments positioned outside of the tyre chamber

Abstract

A tire pressure sensor including a body, a sealing member and a circuit and signal transmission apparatus is provided. The body includes a first casing, a first hole, a receiving portion and a second casing. The receiving portion connects with the first hole passing through the first casing. The sealing member includes a second hole that is set through the rubber component of and communicates with the first hole. The sealing member is located in the receiving portion. The circuit and signal transmission apparatus includes a circuit apparatus and a hole. The hole positioned on the surface of the circuit apparatus communicates with the first hole and second hole to form an air seal channel. The air pressure of the tire is injected through the air seal channel into the hole, and the tire pressure sensor can detect the pressure and temperature of the air of the tire.

Claims

1. A tire pressure sensor, comprising:

a body comprising a first casing and a second casing, and having a first hole defined through the first casing, a receiving portion protruding inside the first casing around the first hole wherein the first casing connects to the second casing, which forms a chamber in the body;

a sealing member mounted and held in the receiving portion, and having a second hole connected with the first hole; and

a circuit and signal transmission apparatus mounted in the body and comprising an integrated circuit member and a signal transmission apparatus, the integrated circuit member having a hole connected with the second hole, wherein the circuit and signal transmission apparatus detects the pressure in a tire through the hole, the second hole and the first hole, and the signal transmission apparatus sends out a signal based on the detection of the circuit and signal transmission apparatus.

2. The tire pressure sensor of claim 1, wherein the first casing comprising:

a connector formed concentrically with the first hole;

a projection formed inside the connector and being concentrically with the connector; and

an O-ring mounted in the connector around the projection.

3. The tire pressure sensor of claim 1, wherein the sealing member comprising:

a first surface connected with the receiving portion, and

a second surface connected with the circuit and signal transmission apparatus, the second surface having a tapered area around the second hole.

4. The tire pressure sensor of claim 1, wherein the sealing member is partially held in and protrudes the receiving portion.

5. The tire pressure sensor of claim 1, wherein the connector has an interior thread the connector.

6. The tire pressure sensor of claim 1, wherein the sealing member is rubber.

7. The tire pressure sensor of claim 6, wherein the rubber is selected from the group consisting of NBR (Butadiene-Acrylontrile Rubber), EPDM (Ethylene Eropylene Diene rubber), CR (Chloroprene Rubber) and silicone rubber.

8. The tire pressure sensor of claim 1, wherein the second hole has an opening size smaller then the opening area of the hole.

9. The tire pressure sensor of claim 1, wherein the circuit and signal transmission apparatus is set in the chamber of the body.

10. The tire pressure sensor of claim 1, wherein the circuit and signal transmission apparatus comprising a circuit board on which the integrated circuit member is mounted;

wherein the signal transmission apparatus connects to the circuit board.

11. The tire pressure sensor of claim 1, wherein the integrated circuit member comprises a sensor and a central processing unit.

12. The tire pressure sensor of claim 1, wherein the signal transmission apparatus comprises a transmitter.