Patents by Inventor Matthew W. Long

Matthew W. Long 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).

  • Wire cutting insert for gate valve
    Patent number: 5501424
    Abstract: A gate valve assembly for controlling fluid flow is provided with wireline-cutting inserts loose-fitted in either of, or both of, the gate opening and at least one of the seats. Each insert has a length that prohibits it from extending beyond the opening in which it is received so that the contact surface between the gate and an adjacent seat forms a continuous seal and the inserts serve only a wireline-cutting function, thus eliminating the possibility of sealing surfaces being damaged by wireline-cutting.
    Type: Grant
    Filed: February 9, 1994
    Date of Patent: March 26, 1996
    Assignee: FMC Corporation
    Inventors: Michael R. Williams, Matthew W. Long