Patents by Inventor Peter R. Parker

Peter R. Parker 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).

  • Powder conveying apparatus
    Patent number: 4105256
    Abstract: Powder conveying apparatus, particularly useful for transferring powder paint from a hopper to a spray gun, employs two flow constrictors defining axially aligned flow passages between a powder inlet and an outlet. An annular gap between opposed ends of the flow constrictors communicates with a compressed gas supply passage for entraining powder from the inlet to the outlet, and one of the flow constrictors is displaceable for adjusting the annular gap and thereby varying the powder throughput rate independently of the compressed gas supply.
    Type: Grant
    Filed: November 4, 1976
    Date of Patent: August 8, 1978
    Assignee: Volstatic of Canada Limited
    Inventors: Peter R. Parker, Norman G. Allen