Instrument calibrating demand flow regulator

Details Instrument calibrating demand flow regulator Instrument calibrating demand flow regulator

1996-03-01

1997-09-09

Raevis, Robert

Measuring and testing

Instrument proving or calibrating

Gas or liquid analyzer

13761419, 13761421, 137907, 73 106, G01N 3100

Patent

active

056658940

ABSTRACT:
An instrument calibrating demand flow regulator for providing a demanded amount of calibration gas from a calibration gas source to an instrument to be calibrated to permit calibration of the instrument includes a housing having an interior, an inlet for connection to the calibration gas source and an outlet for connection to the instrument to be calibrated. A pressure regulating valve device positioned within the interior of the housing regulates the pressure of the calibrated gas entering the interior of the housing through the inlet and a demand flow valve device delivers calibration gas to the outlet of the housing upon demand by a pump operatively associated with the instrument.

REFERENCES:
patent: 3467137 (1969-09-01), Brown
patent: 3633611 (1972-01-01), MacNiel
patent: 4140113 (1979-02-01), Pedersen
patent: 4214580 (1980-07-01), Pedersen
patent: 4921006 (1990-05-01), Evans
patent: 4977776 (1990-12-01), Shindo et al.
patent: 5343858 (1994-09-01), Winefordner et al.
patent: 5520170 (1996-05-01), Laswick et al.

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