Patents by Inventor Stewart J. Ashman

Stewart J. Ashman 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).

  • Patent number: 4356971
    Abstract: A metal spraying apparatus comprises a gun having convergent guide passages (36,38) through which metallic wires are fed. An electrical potential is applied across the wires, by conductor elements (54), to cause arcing between the wires where they emerge from the guide passages, which melts the wires. A stream of compressed air causes molten metal droplets to be carried from the arcing zone towards the surface to which a metallic coating is to be applied. The apparatus also comprises a supplying device, to supply electricity and air under pressure to the gun. The conductor elements extend within conduits (18) through which air is fed to the gun, and the gun comprises a valve (9) for cutting off the flow of air through the gun. The supplying device comprises a control device (82) which is responsive to such cut off, to cut off the supply of electricity to the gun.
    Type: Grant
    Filed: May 12, 1980
    Date of Patent: November 2, 1982
    Assignee: Metallisation Limited
    Inventor: Stewart J. Ashman