Patents by Inventor Denis W. Bedford

Denis W. Bedford 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).

  • Pumping apparatus with a hollow shaft acting as a valve
    Patent number: 8657592
    Abstract: A pumping apparatus includes a pump housing, a pumping member which is rotatable in the housing to pump fluid, the pumping member being provided on a support which is in use, driven, the housing including in communication with an inlet, a lower pressure region, and in communication with an outlet, a higher pressure region, there being a passage for fluid from the higher pressure region to the lower pressure region through the support when the fluid pressure in the higher pressure region exceeds a threshold value.
    Type: Grant
    Filed: September 4, 2008
    Date of Patent: February 25, 2014
    Assignee: J.C. Bamford Excavators Limited
    Inventor: Denis W. Bedford
  • Pumping Apparatus
    Publication number: 20090060769
    Abstract: A pumping apparatus includes a pump housing, a pumping member which is rotatable in the housing to pump fluid, the pumping member being provided on a support which is in use, driven, the housing including in communication with an inlet, a lower pressure region, and in communication with an outlet, a higher pressure region, there being a passage for fluid from the higher pressure region to the lower pressure region through the support when the fluid pressure in the higher pressure region exceeds a threshold value.
    Type: Application
    Filed: September 4, 2008
    Publication date: March 5, 2009
    Applicant: J.C. BAMFORD EXCAVATORS LIMITED
    Inventor: Denis W. Bedford