Measuring and testing – Sampler – sample handling – etc. – Plural parallel systems
Patent
1982-05-05
1984-04-24
Swisher, S. Clement
Measuring and testing
Sampler, sample handling, etc.
Plural parallel systems
7386411, 422100, B01L 302
Patent
active
044440626
ABSTRACT:
The liquid transfer device includes a hand-held housing having a plunger mounted for sliding movement therein with a plurality of rods on one end thereof. The plunger is located within a recess in the housing with the rods normally protruding outside the recess when the plunger is located fully within the recess. A barrel assembly is detachably connected to the housing and is provided with a plurality of through passages that are in equal number to the number of rods. An elastic diaphragm or membrane is secured between the housing and the barrel assembly over the rods so that the membrane is stretched into the individual through passages by means of the rod so that the ends of the through passages adjacent the housing are sealed by the membrane. Upon depression of the plunger, the rods extend further into the through passages by stretching the elastic membrane and upon releasing the plunger the elastic membranes act as a return spring for the plunger and rods to draw fluid into the passages from a suitable source for a subsequent deposit in individual test receptacles.
REFERENCES:
patent: 2152105 (1939-04-01), Szecsi
patent: 3650306 (1972-03-01), Lancaster
Bennett John T.
Goodman Jack E.
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