Patents by Inventor Robert D. Barree

Robert D. Barree 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).

  • Back pressure regulator
    Patent number: 4846215
    Abstract: A back pressure regulator of the diaphragm type. A metal diaphragm is held in a cavity formed by opposed faces of top and bottom portions of the unit. The opposed faces are tapered so that the depth of the cavity is greatest in the central portion of the diaphragm, allowing for movement of the diaphragm. A fluid outlet leading into the cavity at the underside of the diaphragm is sealed by contact of the underside of the diaphragm with an O-ring which surrounds the fluid outlet and extends into the cavity. When the pressure of the fluid in the cavity above the diaphragm is greater than the pressure of the fluid beneath the diaphragm the diaphragm is maintained in contact with the O-ring to prevent flow through the outlet.
    Type: Grant
    Filed: June 7, 1988
    Date of Patent: July 11, 1989
    Assignee: Marathon Oil Company
    Inventor: Robert D. Barree
  • High pressure coupling
    Patent number: 4776618
    Abstract: A high-pressure coupling for small-diameter pipe is obtained with standard male and female pipe connectors, three ferrules, an O-ring and a flat metallic washer disposed around the pipe and designed such that when the connectors are hand tightened, the coupling compresses the ferrules, O-ring and flat washer to obtain a coupling that will withstand pressures up to 10,000 psi.
    Type: Grant
    Filed: August 14, 1987
    Date of Patent: October 11, 1988
    Assignee: Marathon Oil Company
    Inventor: Robert D. Barree
  • High speed, high temperature three-way valve for switching high pressure fluids under low pressure control
    Patent number: 4726398
    Abstract: Disclosed is a low internal volumn three-way valve for high speed switching of high pressure, high temperature fluids without volume change. Such valves have particular application with positive displacement pumps for precision laboratory measurements wherein corrosive fluids are used.
    Type: Grant
    Filed: December 16, 1986
    Date of Patent: February 23, 1988
    Assignee: Marathon Oil Company
    Inventor: Robert D. Barree
  • Automated gas-liquid relative permeameter
    Patent number: 4679421
    Abstract: An automated system for instantaneously measuring the production rates of gas and liquid produced from a sample core for automatically determining gas-liquid relative permeability. An apparatus is provided for collecting the produced fluids wherein the weight of the produced liquid is monitored instantaneously by a sensitive electronic load cell and wherein the volume of the gas produced is instantaneously monitored.
    Type: Grant
    Filed: July 10, 1986
    Date of Patent: July 14, 1987
    Assignee: Marathon Oil Company
    Inventor: Robert D. Barree
  • High speed, high temperature three-way valve for switching high pressure fluids under low pressure control
    Patent number: RE33246
    Abstract: Disclosed is a low internal volumn three-way valve for high speed switching of high pressure, high temperature fluids without volume change. Such valves have particular application with positive displacement pumps for precision laboratory measurements wherein corrosive fluids are used.
    Type: Grant
    Filed: September 6, 1989
    Date of Patent: July 3, 1990
    Assignee: Marathon Oil Company
    Inventor: Robert D. Barree