Patents by Inventor Marvin J. Eull

Marvin J. Eull 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).

  • Rotatable spray nozzle with safety guard
    Patent number: 4165836
    Abstract: Apparatus for attachment to a hand operated spray gun, comprising a cylindrical rotatable member having a spray orifice therein, which is rotatable between a spraying position and an orifice cleaning position, the rotatable cylindrical member having a metallic sealing member surface of matching shape and adjacent thereto, and a further resilient sealing member for permitting leakproof attachment to a spray device. The rotatable spray member is actuably coupled to a safety tip guard so as to become disassembled if the safety tip guard is removed.
    Type: Grant
    Filed: January 3, 1978
    Date of Patent: August 28, 1979
    Assignee: Graco Inc.
    Inventor: Marvin J. Eull
  • Pressure unloading apparatus for a diaphragm pump
    Patent number: 4019837
    Abstract: Apparatus is disclosed for unloading excess pressures developed in a hydraulic diaphragm pump, wherein the pressure of the pumped fluid is sensed by a control diaphragm connected to an unloading valve which is placed in a passage connecting the hydraulic displacement chamber with a hydraulic oil reservoir.
    Type: Grant
    Filed: May 30, 1975
    Date of Patent: April 26, 1977
    Assignee: Graco Inc.
    Inventor: Marvin J. Eull
  • Spray unit
    Patent number: D243016
    Type: Grant
    Filed: March 1, 1976
    Date of Patent: January 11, 1977
    Assignee: Graco Inc.
    Inventors: George W. Bills, Marvin J. Eull