Precision liquid dispensing device

Details Precision liquid dispensing device Precision liquid dispensing device

1976-05-26

1977-01-18

Tollberg, Stanley H.

Dispensing

With recorder, register, indicator, signal or exhibitor

Position or extent of motion indicator

734256, 222309, 222383, B67D 522

Patent

active

040034992

ABSTRACT:
A liquid dispensing burette adapted to be mounted on the top of a reagent bottle or container and having inlet and outlet conduits provided with ball check valves in communication with an upstanding burette barrel containing a plunger. The barrel has a volumetric scale and a shield member is secured to the top of the plunger and extends downwardly over the barrel. The shield member has a large window aperture for viewing the scale and has a depending vertical rod fixed therein adjacent the window aperture. A magnifying indicator is adjustably mounted on the rod and overlies the scale, and has a set screw projecting through the window aperture for adjusting the vertical indicator relative to the scale, for setting the volume to be dispensed. The magnifying indicator is engageable with a stop member at the top of the barrel to limit liquid intake produced by upward extension of the plunger in accordance with the set volume.

REFERENCES:
patent: 3049270 (1962-08-01), Maeder
patent: 3810391 (1974-05-01), Suovaniemi

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