Patents by Inventor Gavin John Liam McIntosh

Gavin John Liam McIntosh 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).

  • Gate valve actuator override mechanism
    Patent number: 6352239
    Abstract: A gate valve hydraulic actuator having a stem extension accessible from outside the actuator body to provide override operation of the gate valve, for example in the event of hydraulic failure. The stem extension is lockable to a spring compression hub in a valve open position and a valve closed position by locking dogs selectively engageable in recesses. The locking dogs are operated by a cam spindle coaxially received in the stem extension.
    Type: Grant
    Filed: March 21, 2000
    Date of Patent: March 5, 2002
    Assignee: FMC Corporation
    Inventors: Gavin John Liam McIntosh, Graeme John Collie