Patents by Inventor Charles Edwin Hunt

Charles Edwin Hunt 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).

  • Temperature-compensating absolute pressure sensor
    Patent number: 10520383
    Abstract: A differential pressure transmitter configured to provide an absolute pressure measurement is presented. The differential pressure sensor comprises a first process fluid inlet. The differential pressure sensor also comprises a second process fluid inlet. The differential pressure sensor also comprises a differential pressure sensor operably coupled to the first and second process fluid inlets. The differential pressure sensor also comprises an absolute pressure cap coupled to the second pressure inlet. The cap comprises a volume of gas within an expansion feature. The volume of gas has a reference pressure. The expansion feature is configured to allow for expansion of the volume of gas in response to a temperature increase, such that the volume of gas maintains the reference pressure.
    Type: Grant
    Filed: September 30, 2016
    Date of Patent: December 31, 2019
    Assignee: Rosemount Inc.
    Inventors: Charles Edwin Hunt, Daniel Alan Norberg
  • TEMPERATURE-COMPENSATING ABSOLUTE PRESSURE SENSOR
    Publication number: 20180094997
    Abstract: A differential pressure transmitter configured to provide an absolute pressure measurement is presented. The differential pressure sensor comprises a first process fluid inlet. The differential pressure sensor also comprises a second process fluid inlet. The differential pressure sensor also comprises a differential pressure sensor operably coupled to the first and second process fluid inlets. The differential pressure sensor also comprises an absolute pressure cap coupled to the second pressure inlet. The cap comprises a volume of gas within an expansion feature. The volume of gas has a reference pressure. The expansion feature is configured to allow for expansion of the volume of gas in response to a temperature increase, such that the volume of gas maintains the reference pressure.
    Type: Application
    Filed: September 30, 2016
    Publication date: April 5, 2018
    Inventors: Charles Edwin Hunt, Daniel Alan Norberg