Signals and indicators – Indicators – Fluid flow
Patent
1978-12-12
1980-05-20
Woodiel, Donald O.
Signals and indicators
Indicators
Fluid flow
73715, G01L 708
Patent
active
042033853
ABSTRACT:
Disclosed herein is a fluid pressure indicator for providing visual indication whether or not the magnitude of a fluid pressure condition is above a predetermined minimum value. The indicator comprises indicating means having an indicating portion and a diaphragm. The indicating means is movable between a first extreme position in which the indicating portion is not visible and a second extreme position in which the indicating portion is visible. The diaphragm has a fixed portion and a resiliently deformable portion which is affixed to the indicating means and movable responsive to changes in the magnitude of the fluid pressure condition. The indicating means is thus movable with the resiliently deformable portion, such that whenever the magnitude of the condition is not in excess of the minimum value, the resiliently deformable diaphragm portion holds the indicating means in its said first position, but a predetermined increase in the magnitude of the condition above the minimum value will deform the deformable diaphragm resiliently, thus to move the indicating means to its said second position.
REFERENCES:
patent: 1444152 (1923-02-01), Hahn
patent: 2417449 (1947-03-01), Rubin
patent: 3111930 (1963-11-01), Zipper
patent: 3489167 (1970-01-01), Kilmarx et al.
patent: 3675722 (1972-07-01), Balmes
patent: 3780693 (1973-12-01), Parr
Technical Data Sheet 8001 "Pneumatic Pressure Indicator IND-3", Clippard Instrument Laboratory, Inc. 2 pp.
Mayer Robert W.
Smorzaniuk Adam
Amerace Corporation
Craig Richard A.
Woodiel Donald O.
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