Patents by Inventor Ian R. Belcher

Ian R. Belcher 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).

  • Helical gear pump and stator with constant rubber wall thickness
    Patent number: 5145343
    Abstract: A helical gear pump having a stator in which the wall thickness of the stator is substantially constant. This reduces heating in dry running conditions and this effect can be improved by providing anti-friction surfaces on both the rotor and stator.
    Type: Grant
    Filed: May 31, 1991
    Date of Patent: September 8, 1992
    Assignee: Mono Pumps Limited
    Inventor: Ian R. Belcher