Patents by Inventor Joe R. Harper

Joe R. Harper 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).

  • Dart valve with centralizer
    Patent number: 10641062
    Abstract: A dart valve includes an inlet centralizer to receive a stem extending from the cone body. The inlet centralizer can stabilize the movement of the cone body by constraining the radial movement of the cone body within the housing. Because the radial movement of the cone body is limited, wear and damage to the cone body and other components of the dart valve is minimized. The dart valve can be utilized in high pressure applications and can be used in horizontal and vertical orientations. Because of this, the dart valve can provide reliable operation in various arrangements.
    Type: Grant
    Filed: February 12, 2019
    Date of Patent: May 5, 2020
    Assignee: C&M Oilfield Rentals, LLC
    Inventors: Christopher Sendlak, Joe R. Harper