Isolation fluid pressure detector

Details Isolation fluid pressure detector Isolation fluid pressure detector

1984-05-17

1985-08-13

Woodiel, Donald O.

Measuring and testing

Fluid pressure gauge

Diaphragm

73119A, 73756, G01L 708

Patent

active

045342245

ABSTRACT:
An isolation fluid pressure detector includes a housing which bounds an internal bore and a recess situated at the axially central region of the bore and extending radially outwardly of the bore over the entire circumference of the same. A flexible sleeve-shaped element is received in the bore and includes a flexible intermediate portion which spans the recess, and two end portions which extend to a considerable distance from the flexible portion along the surface bounding the bore. The sleeve-shaped element has external arms which axially bound a confining space in the recess and are confined between end portions and an intermediate portion of the housing to seal such interfaces. A pressure gauge detects the pressure prevailing in the confining space through a measuring port of the housing. When fluid to be measured is admitted into an internal passage of the sleeve-shaped element, its pressure deflects the flexible portion, thus changing the pressure of a pressure-transmitting fluid confined in the confining space, the pressure-transmitting fluid in turn exerting its pressure on a pressure-detecting mechanism of the gauge, which thus gives accurate indication of the pressure of the fluid in the passage. The integral end portions of the sleeve-shaped element prevent the fluid being measured from penetrating into the interfaces between the arms and the surfaces axially delimiting the recess, thus avoiding interference with the flexing of the flexible portion.

REFERENCES:
patent: 2552750 (1951-05-01), Thornhill
patent: 3163529 (1964-12-01), Jewett
patent: 3563095 (1971-02-01), Robinson, Jr.
patent: 4218926 (1980-08-01), De Visser

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