Patents by Inventor David Frederick Normen

David Frederick Normen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • In-flow determination of left and right eigenvectors in a Coriolis flowmeter
    Patent number: 7706987
    Abstract: A method and apparatus for periodically calculating the relative phase of the left eigenvector for a vibrating conduit is provided. During normal operation, two drivers are used in tandem to excite the main bending mode of the conduit (202). Periodically, first one (204), then the second (206), of the two drivers is disabled, allowing measurements that enable the determination of the relative phase of the left eigenvector (208) for the vibrating conduit.
    Type: Grant
    Filed: September 27, 2004
    Date of Patent: April 27, 2010
    Assignee: Micro Motion, Inc.
    Inventors: Thomas Dean Sharp, David Frederick Normen, Stuart J. Shelley
  • Dual loop coriolis effect mass flowmeter
    Patent number: 6564650
    Abstract: An apparatus for measuring the flow rate of a fluid flowing through a minimal flow pipeline with a Coriolis effect mass flowmeter. The flowmeter has a single flow tube with two loops. The loops are connected by a cross-over section and are adapted to be vibrated in phase opposition by a driver. The phase difference between the ends of the vibrating loops is measured. The measured phase difference is used to find the flow rate of the fluid. The flow tube is fixably attached to an anchor which is, in turn, attached to a housing. The anchor separates the vibrating dynamic portion of the flowmeter from the non-vibrating portion of the flowmeter.
    Type: Grant
    Filed: March 15, 2001
    Date of Patent: May 20, 2003
    Assignee: Micro Motion, Inc.
    Inventors: Curtis John Ollila, David Frederick Normen, Ernest Dale Lister
  • Dual loop Coriolis effect mass flowmeter
    Patent number: 6332367
    Abstract: An apparatus for measuring the flow rate of a fluid flowing through a minimal flow pipeline with a Coriolis effect mass flowmeter. The flowmeter has a single flow tube with two loops. The loops are connected by a cross-over section. A driver oscillates the loops and the phase difference between the ends of the loops is measured. The measured phase difference is then used to find the flow rate of the fluid. The flow tube is fixedly attached to an anchor which is, in turn, attached to a housing. The anchor separate the vibrating, dynamic portion of the flowmeter from the non-vibrating portion of the flowmeter.
    Type: Grant
    Filed: March 11, 1997
    Date of Patent: December 25, 2001
    Assignee: Micro Motion, Inc.
    Inventors: Curtis John Ollila, David Frederick Normen, Ernest Dale Lister
  • Dual loop coriolis effect mass flowmeter
    Publication number: 20010029790
    Abstract: An apparatus for measuring the flow rate of a fluid flowing through a minimal flow pipeline with a Coriolis effect mass flowmeter. The flowmeter has a single flow tube with two loops. The loops are connected by a cross-over section and are adapted to be vibrated in phase opposition by a driver. The phase difference between the ends of the vibrating loops is measured. The measured phase difference is used to find the flow rate of the fluid. The flow tube is fixably attached to an anchor which is, in turn, attached to a housing. The anchor separates the vibrating dynamic portion of the flowmeter from the non-vibrating portion of the flowmeter.
    Type: Application
    Filed: March 15, 2001
    Publication date: October 18, 2001
    Inventors: Curtis John Ollila, David Frederick Normen, Ernest Dale Lister
  • Dual loop coriolis effect mass flowmeter
    Patent number: 6293158
    Abstract: An apparatus for measuring the flow rate of a fluid flowing through a minimal flow pipeline with a Coriolis effect mass flowmeter. The flowmeter has a single flow tube with two loops. The loops are connected by a cross-over section. A driver oscillates the loops and the phase difference between the ends of the loops is measured. The measured phase difference is then used to find the flow rate of the fluid. The flow tube is fixably attached to an anchor which is, in turn, attached to a housing. The anchor separates the vibrating, dynamic portion of the flowmeter from the non-vibrating portion of the flowmeter.
    Type: Grant
    Filed: April 4, 2000
    Date of Patent: September 25, 2001
    Assignee: Micro Motion, Inc.
    Inventors: Curtis John Ollila, David Frederick Normen, Ernest Dale Lister
  • Dual loop coriolis effect mass flowmeter
    Patent number: 6044715
    Abstract: An apparatus for measuring the flow rate of a fluid flowing through a minimal flow pipeline with a Coriolis effect mass flowmeter. The flowmeter has a single flow tube with two loops. The loops are connected by a cross-over section. A driver oscillates the loops and the phase difference between the ends of the loops is measured. The measured phase difference is then used to find the flow rate of the fluid. The flow tube is fixedly attached to an anchor which is, in turn, attached to a housing. The anchor separate the vibrating, dynamic portion of the flowmeter from the non-vibrating portion of the flowmeter.
    Type: Grant
    Filed: March 11, 1997
    Date of Patent: April 4, 2000
    Assignee: Micro Motion, Inc.
    Inventors: Curtis John Ollila, David Frederick Normen, Ernest Dale Lister
  • Method for manufacturing a dual loop coriolis effect mass flowmeter
    Patent number: 5996225
    Abstract: An apparatus for measuring the flow rate of a fluid flowing through a minimal flow pipeline with a Coriolis effect mass flowmeter. The flowmeter has a single flow tube with two loops. The loops are connected by a cross-over section. A driver oscillates the loops and the phase difference between the ends of the loops is measured. The measured phase difference is then used to find the flow rate of the fluid. The flow tube is fixedly attached to an anchor which is, in turn, attached to a housing. The anchor separate the vibrating, dynamic portion of the flowmeter from the non-vibrating portion of the flowmeter.
    Type: Grant
    Filed: September 2, 1998
    Date of Patent: December 7, 1999
    Assignee: Micro Motion, Inc.
    Inventors: Curtis John Ollila, David Frederick Normen, Ernest Dale Lister