Check device for air activated pressure valve

Details Check device for air activated pressure valve Check device for air activated pressure valve

1997-04-07

1999-06-15

Barlow, John

Data processing: measuring, calibrating, or testing

Calibration or correction system

Pressure

340626, 137557, F16K 3700

Patent

active

059131837

ABSTRACT:
A modified air activated pressure valve is described, together with a method for its manufacture, that has a pressure sensitive switch located in the inlet chamber and in the outlet chamber. These pressure sensitive switches are preset by the user to output a finite voltage (typically about 5 volts) only when they are exposed to a pressure that exceeeds some value. The outputs of both switches may then be displayed, as needed. Additionally, a display circuit is provided that gives an output signal only when both the inlet and the outlet chambers are at or above their intended pressures.

REFERENCES:
patent: 4341241 (1982-07-01), Baker
patent: 4545406 (1985-10-01), King
patent: 4718445 (1988-01-01), Lundberg et al.
patent: 5033012 (1991-07-01), Wohld
patent: 5251148 (1993-10-01), Haines et al.
patent: 5316217 (1994-05-01), Guzowski et al.
patent: 5558115 (1996-09-01), Lenz et al.

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