Apparatuses and methods for delivering liquid chemical products

Details Apparatuses and methods for delivering liquid chemical products Apparatuses and methods for delivering liquid chemical products

2005-07-19

2005-07-19

Bui, Bryan (Department: 2863)

Data processing: measuring, calibrating, or testing

Measurement system in a specific environment

Mechanical measurement system

C702S100000, C702S101000

Reexamination Certificate

active

06920401

ABSTRACT:
A method and an apparatus for measuring the amount of liquid in a container, and for causing the liquid to flow from the container to a point of use. The weight of the container is measured at several time intervals to determine the weight change of the liquid contained within. When the weight change is less than a predetermined fraction of either the weight of container weight and/or of the liquid originally contained in the container, a signal is generated to indicate that the container may be empty.

REFERENCES:
patent: 4013195 (1977-03-01), Ferris
patent: 4843876 (1989-07-01), Holm
patent: 5499656 (1996-03-01), Stotelmyer et al.
patent: 5636513 (1997-06-01), Pahl
patent: 2000 338115 (2000-12-01), None
patent: WO 02 04899 (2002-01-01), None
French Search Report to FR 02 10712.

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