Title:
【発明の名称】応力遮断用凹部付き圧力トランスミッタ
Document Type and Number:
Japanese Patent JP3133759
Kind Code:
B2
Abstract:
A pressure transmitter has a pressure transducer in a transmitter housing. The transmitter housing includes a groove or a notch defining a flexure closely proximate a housing outer rim. The outer rim receives a large clamping force from a flange and is deflectable about the flexure for reducing transmission of axial and radial components of the clamping force from the housing outer rim to the transducer, which forces can cause distortions to the pressure transducer. Unevenly distributed clamping forces caused by differential thermal expansion of the flange, bolts and housing, are isolated from the transducer thereby reducing measurement errors. Further, transmission of hysteretic radial forces from the transmitter housing to the transducer caused by friction when the flange slides across the pressure transmitter housing, each having different thermal coefficients of expansion, is also reduced. Several types of pressure transducers including capacitive cell transducers can be in the transmitter housing for providing a pressure output indicative of line and differential pressure.
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Inventors:
Dane, Michael Jay.
Mattison, Lee Ann
Crows, Terence F.
Mattison, Lee Ann
Crows, Terence F.
Application Number:
JP50233092A
Publication Date:
February 13, 2001
Filing Date:
November 20, 1991
Export Citation:
Assignee:
Rosemount Incorporated
International Classes:
G01L9/00; G01L13/02; G01L9/12; G01L19/00; (IPC1-7): G01L13/02
Domestic Patent References:
| JP60220838A | ||||
| JP6224335A | ||||
| JP1296121A | ||||
| JP62114333U | ||||
| JP60125551U |
Other References:
【文献】米国特許5094109(US,A)
Attorney, Agent or Firm:
Michito Hiraki (1 person outside)