Patents by Inventor Henry J. Vartanian

Henry J. Vartanian 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).

  • System and method for controlling blasting apparatus
    Patent number: 5097633
    Abstract: Operation of a blasting hose is controlled safely and efficiently by the operator at the nozzle by means of a switch-controlled circuit housed at the nozzle and connected to circuits at the blast pot by means of a three-wire cable arranged to stop operation of the blast pot if a main switch held by the operator is released by the operator. The switch-controlled circuit includes a tone generator to produce tones correlated to changing the mix of blast agent and air, as well as cutting off the supply of either or both.
    Type: Grant
    Filed: November 6, 1989
    Date of Patent: March 24, 1992
    Inventors: Donald L. Branton, Edward C. Moon, Henry J. Vartanian