Measuring and testing – Fluid pressure gauge – Diaphragm
Reexamination Certificate
2007-05-08
2007-05-08
Lefkowitz, Edward (Department: 2855)
Measuring and testing
Fluid pressure gauge
Diaphragm
C073S717000, C073S753000, C073S756000
Reexamination Certificate
active
11070277
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.
REFERENCES:
patent: 4894698 (1990-01-01), Hijikigawa et al.
patent: 5436491 (1995-07-01), Hase et al.
patent: 6167761 (2001-01-01), Hanzawa et al.
patent: 6465271 (2002-10-01), Ko et al.
patent: 6877383 (2005-04-01), Horie et al.
patent: A-2002-98607 (2002-04-01), None
First Office Action from Chinese Patent Office issued on Dec. 15, 2006 for the corresponding Chinese patent application No. 200510052996.1 (a copy and English translation thereof).
DENSO Corporation
Jenkins Jermaine
Lefkowitz Edward
Posz Law Group , PLC
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