Measuring and controlling the flow of flowable materials

Details Measuring and controlling the flow of flowable materials Measuring and controlling the flow of flowable materials

2005-05-17

2005-05-17

Lefkowitz, Edward (Department: 2855)

Measuring and testing

Volume or rate of flow

Using differential pressure

C073S861530

Reexamination Certificate

active

06892586

ABSTRACT:
A method of determining an inlet flow rate (Finlet) of a flowable material including passing an inlet stream of flowable material through a chamber (20) having an outlet aperture (100); measuring a first rate of change of quantity of material in the chamber (20) when the material is entering at said inlet flow rate; measuring a second rate of change of quantity if material in the chamber (20) when no material is entering the chamber (20); and calculating the inlet flow rate (Finlet) from said first and second rates, wherein both rate measurements are made while the whole of the outlet aperture (100) of the chamber (100) of the chamber (20) is occupied by the flowable material.

REFERENCES:
patent: 5476574 (1995-12-01), Welch et al.
patent: 5576499 (1996-11-01), Davies
patent: 5798466 (1998-08-01), Satake et al.
patent: 36 17 595 (1987-11-01), None
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patent: 0 834 723 (1998-04-01), None
patent: 2 241 789 (1991-09-01), None
patent: 234570 (1990-07-01), None
patent: WO 9405980 (1994-03-01), None

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