US 8,024,976 B2Granted

Combined wet-wet differential and gage transducer employing a common housing

AssigneeKulite Semiconductor Products, Inc.

InventorAnthony D. Kurtz

Life of this patent

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Abstract

A combined wet-wet differential transducer and a gage pressure transducer located in the same housing, comprising a semiconductor chip which comprises a gage sensor chip on one section and a differential sensor chip on a second section. Each sensor chip has a Wheatstone bridge comprising piezoresistors and is responsive to an applied pressure. The gage chip and the differential chip are placed in a header having a front section and a back section adapted to receive a first and second pressure, respectively. The sensors are in communication with first and second pressure ports such that the absolute sensor provides an output indicative of a pressure applied to a first port and the differential sensor provides an output indicative of the pressure difference between the first and second pressure ports.

Claims18

Dependent claims

A combined pressure transducer, comprising:

a housing having an internal hollow and a first and second pressure port;
a first header having a first and second flexible isolation diaphragm;
a first pressure sensor on the first header having a first sensor diaphragm, said first sensor diaphragm communicating with the first flexible isolation diaphragm and the second flexible isolation diaphragm;
a second pressure sensor on the first header having a second sensor diaphragm, said second sensor diaphragm communicating with the first flexible isolation diaphragm;
the first header positioned in the hollow of the housing;
the first header coupled so that the first flexible isolation diaphragm communicates with the first pressure port of the housing;
the first header coupled so that the second flexible isolation diaphragm communicates with the second pressure port of the housing.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 12/819,958Filed 21 Jun 2010 · continuation
Priority: 11 Dec 2008
Published: US 2010/0147082 A17 Oct 2010
Granted: 27 Sep 2011
Term ends: Not estimatedThe source records don’t support an estimate.

Classification4 codes

G01L 19/0645
Protection against aggressive medium in general: using isolation membranes, specially adapted for protection
G01L 15/00
Devices or apparatus for measuring two or more fluid pressure values simultaneously
G01L 19/0038
Fluidic connecting means: being part of the housing
G01L
Measuring force, stress, torque, work, mechanical power, mechanical efficiency, or fluid pressure

Family

Application12/316,317Parent of this continuation · filed 11 Dec 2008
US 2010/0251825 A1Pre-grant publication · published 7 Oct 2010
US 7,775,117 B2Parent of this continuation
US 2010/0147082 A1Published application
US 8,024,976 B2This patent

From the US filing history. Foreign family members aren’t listed.