Dispensing – Plural sources – compartment – containers and/or spaced jacket – With discharge assistant for each source
Patent
1983-10-11
1986-07-08
Rolla, Joseph J.
Dispensing
Plural sources, compartment, containers and/or spaced jacket
With discharge assistant for each source
222263, 222327, 222333, 7386412, 7386416, B67D 552, B01L 302
Patent
active
045988404
ABSTRACT:
A precision fluid dilution device intended primarily for handling precisely sized fluid samples and diluting such samples with preset volumes of a diluent, such as a chemical reagent, in which the diluent is contained in a removable valveless fluid cartridge that normally uses separate piston cylinders and pistons therein disposed for sampling and for diluent delivery. Sample pickup and diluent delivery is preferably accomplished in a tubular fluid passageway attached to the cartridge, such tubular passageway terminating in an open end after passing through a hand probe in most instances. Sample pickup is accomplished by inserting the tubular passageway open end into a sample fluid, withdrawing the sample piston a precise distance thereby aspirating a known amount of sample fluid into the tubular passageway. An accurate amount of diluent is then dispensed along with the sample. In addition to dilution of samples, this device may be used for dispensing reagent or other fluids only, pipeting a series of samples, and for pickup and discharge of reagents or other fluids with the tubular passageway. Piston actuation in the preferred embodiment is done by digital linear actuator motors that also provide the force to release the cartridge. The pistons disconnect and remain in separate piston cylinders in the cartridge upon removal of the cartridge. The readily changed self contained fluid cartridge requires no high maintenance contaminating valves or separate reagent reservoirs. An alternative embodiment is a single piston version herein described which is primarily intended for the dispensing of reagents only.
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Huppert Michael S.
Rolla Joseph J.
Van Der Wall Robert J.
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