Patents by Inventor Maurice M. Emery

Maurice M. Emery 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).

  • Circulation valve for in-hole motors
    Patent number: 4298077
    Abstract: An in-hole fluid motor has a stator connected with a fluid conduit and a rotor connected with a drive shaft for a bit to drill a bore hole as drilling fluid is circulated through the conduit and the stator, the fluid returning through the bore hole annulus to the top of the bore hole. A circulation valve between the stator and the fluid conduit is opened by the flow of fluid through the valve to by-pass the stator and allow flow of fluid into the annulus. The circulation valve is incorporated in a structure which allows the conduit to fill and dump during lowering in and removal from the fluid in the bore hole.
    Type: Grant
    Filed: June 11, 1979
    Date of Patent: November 3, 1981
    Assignee: Smith International, Inc.
    Inventor: Maurice M. Emery