US Patent 7213463 Pressure sensor having liquid in a pressure sensing chamber

Patent 7213463 was granted and assigned to Denso on May, 2007 by the United States Patent and Trademark Office.

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Is a

Patent

Patent attributes

Current Assignee

Denso

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

7213463

Date of Patent

May 8, 2007

Patent Application Number

11070277

Date Filed

March 3, 2005

Patent Primary Examiner

‌

Edward Lefkowitz

Patent abstract

A pressure sensor includes a sensor chip, a pressure receiving diaphragm, a connector case, and a case. A pressure sensing chamber is provide in the connector case and filled with oil. The sensor chip is arranged in the chamber and the diaphragm is fixed to the connector case such that it has contact with the oil and seals the chamber. An O-ring and a welding ring are placed around an edge of the diaphragm and the chamber between the diaphragm and the connector case. The diaphragm is fixed to the connector case via the O-ring and the welding ring and fixed. An inner portion of the welding ring is formed such that it can be placed between the sensor chip, wires, and the diaphragm in the chamber.