Mass flowmeter apparatus

Patent 4718443 Issued on January 12, 1988. Estimated Expiration Date:

February 6, 2007. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

3001397

3125881

3400577

3835700

Additive metering control system
Patent #: 4353482
Issued on: 10/12/1982
Inventor: Tomlinson , et al.

Measuring low flowrates
Patent #: 4397189
Issued on: 08/09/1983
Inventor: Johnson , et al.

Apparatus and method for determining liquid flowrate
Patent #: 4480466
Issued on: 11/06/1984
Inventor: Gates

Method and arrangement for determination of values relating to the mass of a flow of material Patent #: 4513830
Issued on: 04/30/1985
Inventor: Persbeck , et al.

Inventors

Application

No. 07/011954 filed on 02/06/1987

US Classes:

137/8, For producing uniform flow137/486, Responsive to change in rate of fluid flow137/487.5, Electrically actuated valve73/223Single measuring chamber

Examiners

Primary: Cohan, Alan

Attorney, Agent or Firm

Schupbach; Cortlan R.

International Classes

G01F 3/00 (20060101)
G01F 3/36 (20060101)
G01F 15/02 (20060101)
G01F 15/00 (20060101)

Abstract

This invention relates to a method and apparatus for a liquid mass flowmeter. The flowmeter apparatus gives correct flow regardless of changes in density, viscosity, or composition of the liquid and corrects flow in spite of errors common in currently used flowmeters, such as, calibration shifts, restricted orifices and/or bearing drag and blade wear of turbine meters.