Dosaging device for liquid media

Details Dosaging device for liquid media Dosaging device for liquid media

1979-01-18

1980-09-23

Serwin, R. E.

Chemical apparatus and process disinfecting, deodorizing, preser

Control element responsive to a sensed operating condition

422103, 734254R, 734256, 222 52, 222 71, G01N 114

Patent

active

042242819

ABSTRACT:
A multiple liquid metering device of the type used in liquid analysis assemblies includes a valve block having an intermediate liquids storage vessel and a moving piston measurement burette. The valve block is provided with a plurality of inlet and outlet nozzles each of which is independently controlled by a valve. Internal passageways in the valve block allow the inlet nozzles to be selectively placed in communication with the burette and the burette to be selectively placed in communication with the intermediate receptacle. Stroke length of the piston and the burette is controlled by a program generator via a piston rod carried perforated disc supplying counting pulses to the program generator in response to activation of the piston motor to move the piston.

REFERENCES:
patent: 3222135 (1965-12-01), Ashmead
patent: 3421858 (1969-01-01), Quinn
patent: 3800984 (1974-02-01), Phelan
patent: 3805998 (1974-04-01), Croslin
patent: 3864978 (1975-02-01), Stephens
patent: 3913899 (1975-10-01), Van der Sluys et al.
patent: 4070156 (1978-01-01), Moran et al.

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