Stephen C Greene

US Patent:

6781814, Aug 24, 2004

Filed:

Nov 3, 2003

Appl. No.:

10/700229

Inventors:

Stephen P. Greene - Coventry RI

Assignee:

Texas Instruments Incorporated - Dallas TX

International Classification:

H01G 700

US Classification:

3612831, 361283, 3612834, 3612833, 361303, 361305, 3613061

Abstract:

A capacitive fluid pressure transducer ( ) has a sensing element ( ) received in an electrically conductive cup-shaped shield member ( ) which is crimped onto the base of an electrical connector ( ). A conditioning circuit ( ) is received in a circuit chamber formed between the sensor element and the connector and is provided with a tab carrying a conductive trace for electrical connection of the shield member with the circuit. The shield member is received in an electrically insulating sleeve ( ) which in turn is received in a cavity formed in a metallic, high strength hexport housing so that the shield member is electrically isolated from the hexport housing. A gasket ( ) disposed between the sensing element ( ) and the bottom wall of the shield member may be formed of electrically conductive material to provide a conductive path electrically connecting a conductive coating on the pressure sensing surface of the sensing element with the conditioning circuit to provide fluid shift correction.

US Patent:

7197937, Apr 3, 2007

Filed:

Jan 17, 2006

Appl. No.:

11/333637

Inventors:

Alan G. Amore - Cumberland RI, US
Eric J. Giasson - Somerset MA, US
James I. Ogilvie - Cranston RI, US
Stephen P. Greene - Harmony RI, US
David J. Field - Attleboro MA, US
Andrew F. Willner - Attleboro MA, US
Vanvisa Attaset - Randallstown MD, US

Assignee:

Sensata Technologies, Inc. - Attleboro MA

International Classification:

G01L 7/08

US Classification:

73715, 73718, 73724

Abstract:

A pressure sensing device () is shown having a ceramic capacitive sensing element () received in a chamber formed in a hexport housing (). The hexport housing has a fluid passageway () communicating with a recessed chamber () formed in a bottom wall circumscribed by an annular platform shoulder (). A thin flexible metal diaphragm () is hermetically attached to the bottom wall along the platform shoulder. A curable adhesive resin having a thermal coefficient of expansion and modulus of elasticity appropriately matching that of sensing element (), such as polyurethane, is cast between the sensing element () and the metal diaphragm () forming, when cured, a layer bonded to both members resulting in a sensor that is effective in monitoring negative as well as positive fluid pressures. In one embodiment a ring is used to define layer laterally and in a second embodiment an insulator sleeve () and shield sleeve () which receives pressure sensing element () each have an open end with an inwardly extending lip () that define layer laterally.