Means and method of measuring and dispensing
AssigneeDRD Diluter Corporation
InventorsHumayun Qureshi, Donald Schwartz
Life of this patent
Estimating the term…
Abstract
A method of metering and dispensing a first liquid, using a probe having an aspiration tip defining a tip chamber. The aspiration tip chamber is sized so as to be capable of holding and metering at least two largely different volumes of a first liquid. In the method a filler liquid is introduced into a portion of the chamber and a first liquid is aspirated in a predetermined amount into the chamber, so that a predetermined amount of the first liquid can be metered and dispensed with high accuracy and precision. The chamber is capable of being used for two largely different doses of the first liquid. Additional liquids can be aspirated along with the filler liquid. The filler using can be a reactant, a cleaner or the like.
Claims13
A method of metering and dispensing required amounts of liquid by the use of an aspiration tip defining a tip chamber having a predetermined total volume, interconnected with an aspiration probe carrying a conduit which is interconnected with a probe liquid volume available from a reservoir,
- said method comprising flowing a selected amount of probe liquid from said probe liquid volume through said conduit in said probe to fill a preselected volume of said chamber with probe liquid, less than said total volume, but of a volume large enough to substantially fill said chamber along with supplemental liquid to be used in said chamber,
- aspirating a portion of said probe liquid and a predetermined first volume of first liquid to be metered;
- and,
- dispensing said first liquid.
In a method of metering and dispensing a first liquid using a probe having an aspiration tip defining a tip chamber, the improvement comprising,
- sizing said aspiration tip chamber so as to be capable of holding and metering two largely different volumes of said first liquid, and
- introducing a filler liquid into a portion of said chamber and aspirating a predetermined amount of said first liquid into said chamber, whereby a predetermined amount of said first liquid can be metered and dispensed with high accuracy and precision.
Dependencies are inferred from the claim text.