Patents by Inventor David H. Malcolm

David H. Malcolm 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).

  • Spray gun having self-contained low voltage and high voltage power supplies
    Patent number: 4290091
    Abstract: An electrostatic spray gun apparatus for coating systems having an entirely self-contained light weight electrical power supply adapted to convert the kinetic energy available in a moving air stream into the required high d.c. potential and which dispenses with external electrical supply connections thereto.
    Type: Grant
    Filed: June 11, 1979
    Date of Patent: September 15, 1981
    Assignee: Speeflo Manufacturing Corporation
    Inventor: David H. Malcolm
  • Energy conversion unit for electrostatic spray coating apparatus and the like
    Patent number: 4219865
    Abstract: An improved energy converting and electric power generating system for electrostatic spray apparatus for coating systems adapted to convert the kinetic energy available in a moving air stream into electrical power.
    Type: Grant
    Filed: September 5, 1978
    Date of Patent: August 26, 1980
    Assignee: Speeflo Manufacturing Corporation
    Inventor: David H. Malcolm