Gas doser

Details Gas doser Gas doser

1984-06-11

1985-11-19

Nozick, Bernard

Measuring and testing

Instrument proving or calibrating

Volume of flow, speed of flow, volume rate of flow, or mass...

251207, 137595, G01C 1738

Patent

active

045534233

ABSTRACT:
A gas doser, including a gas input member, a gas output member and a charge-over rotor therebetween. The input member includes a gas input member having a carrier gas input port, a calibrating gas input port, a first chamber communicating with the carrier gas input port and a second chamber communicating with the calibrating gas input port. The output member has a carrier gas output port and a calibrating gas output port, respectively communicating with a third chamber and a fourth chamber. The rotor has a carrier gas ventilating conduit for providing communication between the first chamber and the third chamber, and calibrating gas measuring conduits for providing communication between the second chamber and the fourth chamber. Opposite ends of the ventilating conduit and the measuring conduits are mutually spaced from each other about the rotor axis at equal distances from the axis. The rotor is successively rotatable between a first position in which the second chamber communicates with the fourth chamber through the ventilating conduit, and second positions in which the first chamber communicates with the third chamber through a successively increasing number of the measuring conduits. With this structure, it is possible to selectively provide doses of calibrating gas in differing predetermined concentrations in a carrier gas simply by adjusting the rotational position of the rotor.

REFERENCES:
patent: 2889852 (1959-06-01), Dunlap
patent: 4085618 (1978-04-01), Collins, Jr.
patent: 4445359 (1984-05-01), Smith

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