Mounting assembly for a pressure transmitter

• US 5,670,722 A
• Filed: 10/09/1996
• Issued: 09/23/1997
• Est. Priority Date: 04/28/1995
• Status: Expired due to Term

• Current Assignee: Rosemount Incorporated (Emerson Electric Company)
• Original Assignee: Rosemount Incorporated (Emerson Electric Company)
• Inventors: Olson, Mark H., Dolezalek, Charles R., Moser, Thomas M., Jost, Michael B.
• Primary Examiner(s): Dombroske, George M.
• Assistant Examiner(s): FELBER, JOSEPH LEON
• Application Number:
  US08/727,280
• Time in Patent Office: 349 Days
• Field of Search: 73/718, 73/720, 73/721, 73/724, 73/726, 73/727, 73/756
• US Class Current: 73/756
• CPC Class Codes: G01L 19/0084 to the outside of the housing other details about the housing see G01L19/14
• CPC Class Codes: G01L 19/0645 using isolation membranes, specially adapted for protection
• CPC Class Codes: G01L 19/143 Two part housings
• CPC Class Codes: G01L 19/147 Details about the mounting of the sensor to support or covering means
• CPC Class Codes: Y10T 29/43 Electric condenser making

Abstract

The present invention relates to a mounting assembly for a pressure sensor in a pressure transmitter. The mounting assembly includes a header having a cavity opening to a first surface. The cavity is defined by an inner endwall and an inner sidewall. A support is joined to the inner endwall within the cavity on a first support end. A pedestal has a first pedestal end supporting the pressure sensor and a second pedestal joined to the second support end. Aligning means align the second pedestal end to the second support end in order that a volume of the mounting assembly is increased to thereby reduce a quantity of fill fluid needed in the sensor cavity.

Claims

1. A mounting assembly for a pressure sensor in a pressure transmitter, the mounting assembly comprising:

a header having a cavity opening to a first surface and a first recess formed in the header above The first surface, wherein the first recess has a width greater than that of the cavity, the cavity being defined by an inner surface and an inner sidewall, the header further having a second recess opening to the inner surface;

a support formed from a first material having a first support end, a second support end and a center section having a surface spaced-apart from and facing the inner surface, the center section having a width greater than that of the first support end or the second support end, wherein the first support end is received in the second recess and joined to surfaces forming the second recess and wherein an outer surface of the center section is spaced-apart from and conforms to corresponding portions of the inner sidewall of the cavity facing the outer surface of the center section;

a pedestal formed from a second material having a first pedestal end disposed in the first recess for supporting the pressure sensor and a second pedestal end joined to the second support end, the second pedestal end having an aperture for receiving the second support end, wherein the second pedestal end has a width matching the width of the center section, wherein an outer surface of the pedestal is spaced-apart from and conforms to corresponding portions of the inner sidewall of the cavity facing the outer surface of the pedestal and wherein the pedestal and the support substantially fill the cavity; and

a spacer disposed in the first recess.

2. The mounting assembly of claim 1 and further comprising electrical leads extending through the header and the first surface into the first recess and electrically coupled to the pressure sensor.

3. The mounting assembly of claim 1 wherein the support and the pedestal occupy 70 to 98 percent of the volume of the cavity.

4. The mounting assembly of claim 3 wherein the support and the pedestal occupy 80 to 98 percent of the volume of the cavity.