Tire pressure sensor capable of preventing pressure and moisture damage

• US 7,654,136 B2
• Filed: 07/24/2007
• Issued: 02/02/2010
• 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
• Primary Examiner(s): Allen; Andre J
• Application Number:
  US11/878,415
• Publication Number:
  US 20080314135A1
• Time in Patent Office: 924 Days
• Field of Search: 731/468, 731/46
• US Class Current: 73/146.8
• 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 including a chamber therein and a connector for connection of an inflating valve of a tire, wherein said connector has a first hole in communication with said chamber;

a sealing member, which is received in said chamber of said body and has a first surface pressed on an interior end of said connector and a second surface opposite to said first surface, having a second hole in communication with said first hole of said connector;

a sensing member having an integrated circuit for sensing pressure, wherein said integrated circuit has a hole on a top thereof, and said second surface of said sealing member is pressed on said top of said integrated circuit, and said hole is in communication with said second hole of said sealing member;

wherein said first hole of said connector and second hole of said sealing member form an air seal channel that is isolated from said chamber of said body to allow air of said tire directly flowing to said hole of said integrated circuit.

2. The tire pressure sensor of claim 1, wherein said connector has a receiving portion on said interior end thereof that said sealing member is squeezed into said receiving portion with said first surface pressed on a bottom of said receiving portion.

3. The tire pressure sensor of claim 1, wherein a diameter of said second hole of said connector is greater than that of said hole of said integrated circuit of said sensing member.

4. The tire pressure sensor of claim 1, wherein said second surface of said sealing is slanted from an edge toward said second hole.