Patents by Inventor George V. Calvert

George V. Calvert 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).

  • Solenoid actuator
    Patent number: 4863143
    Abstract: A solenoid actuator has an external casing comprising a part 16 mechanically drawn from a mild steel work piece and a second part in the form of a machined, screw threaded bush 20 welded to the drawn part 16. The part 16 is mechanically drawn to incorporate means such as a nut 18 by which the actuator can be threaded in to engagement with a complementary structure. In the case of a diesel engine, for example, the actuator may form a fuel cut off valve when mounted to the diesel engine valve casting.
    Type: Grant
    Filed: April 14, 1987
    Date of Patent: September 5, 1989
    Assignee: PED Limited
    Inventors: Barry S. Cowley, George V. Calvert