Patents by Inventor J. Davis Miller

J. Davis Miller 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).

  • Patent number: 7621728
    Abstract: A reciprocating piston/plunger pump inlet manifold includes an elongated cylindrical manifold member closable at opposite ends by transverse end caps connected to the manifold member by releasable couplings. A rubber or polymer liner formed with nitrogen filled closed cells is disposed within the manifold member. Spaced apart fluid discharge guide and mixing tubes are connected to the manifold member and include flanges for securing the manifold to inlet valve housings of a pump. The fluid flow guide and mixing tubes include partitions and a mixing chamber portion of the tubes. Improved fluid flow characteristics with minimal solids separation and minimal fluid velocity or acceleration induced pressure losses are exhibited by the manifold.
    Type: Grant
    Filed: June 7, 2005
    Date of Patent: November 24, 2009
    Inventor: J. Davis Miller
  • Patent number: 7623986
    Abstract: A power pump performance analysis system includes a signal processor connected to pressure sensors for sensing pressures in the cylinder chambers and inlet and discharge piping of a single or multi-cylinder pump. Pump speed and piston position are determined by a crankshaft position sensor. Pump vibration, fluid temperatures, and power input may also be measured by sensors connected to the processor. Performance analyses, including determination of pump volumetric efficiency, mechanical efficiency, suction and discharge valve sealing delay, valve and piston seal leakage, flow induced pressure variations, acceleration induced pressure detection, hydraulic resonance detection and pulsation dampener performance may be measured and selected parameters displayed on a visual display connected to the processor directly or via a network.
    Type: Grant
    Filed: April 14, 2005
    Date of Patent: November 24, 2009
    Inventor: J. Davis Miller
  • Patent number: 7581449
    Abstract: A power pump performance analysis system and methods includes a signal processor connected to certain sensors for sensing pressures and stresses in the cylinder chambers and the inlet and discharge piping of a single or multicylinder pump. Pump speed and pump piston position may be determined by a crankshaft position sensor. Performance analyses for pump work performed, pump cylinder chamber stress, pump fluid end useful cycles to failure, and crosshead loading and shock analysis are provided for estimating pump component life and determining times for component replacement before failure.
    Type: Grant
    Filed: May 15, 2006
    Date of Patent: September 1, 2009
    Assignee: WRDS, Inc.
    Inventor: J. Davis Miller
  • Publication number: 20080196512
    Abstract: A power pump performance analysis system and methods includes a signal processor connected to certain sensors for sensing pressures and stresses in the cylinder chambers and the inlet and discharge piping of a single or multicylinder pump. Pump speed and pump piston position may be determined by a crankshaft position sensor. Performance analyses for pump work performed, pump cylinder chamber stress, pump fluid end useful cycles to failure, and crosshead loading and shock analysis are provided for estimating pump component life and determining times for component replacement before failure.
    Type: Application
    Filed: May 15, 2006
    Publication date: August 21, 2008
    Applicant: WRDS, INC.
    Inventor: J. Davis Miller
  • Patent number: 6882960
    Abstract: A power pump performance analysis system includes a signal processor connected to pressure sensors for sensing pressures in the cylinder chambers and inlet and discharge piping of a single or multi-cylinder pump. Pump speed and piston position are determined by a crankshaft position sensor. Pump vibration, fluid temperatures, and power input may also be measured by sensors connected to the processor. Performance analyses, including determination of pump volumetric efficiency, mechanical efficiency, suction and discharge valve sealing delay, valve and piston seal leakage, flow induced pressure variations, acceleration induced pressure detection, hydraulic resonance detection and pulsation dampener performance may be measured and selected parameters displayed on a visual display connected to the processor directly or via a network.
    Type: Grant
    Filed: February 21, 2003
    Date of Patent: April 19, 2005
    Inventor: J. Davis Miller
  • Publication number: 20040167738
    Abstract: A power pump performance analysis system includes a signal processor connected to pressure sensors for sensing pressures in the cylinder chambers and inlet and discharge piping of a single or multi-cylinder pump. Pump speed and piston position are determined by a crankshaft position sensor. Pump vibration, fluid temperatures, and power input may also be measured by sensors connected to the processor. Performance analyses, including determination of pump volumetric efficiency, mechanical efficiency, suction and discharge valve sealing delay, valve and piston seal leakage, flow induced pressure variations, acceleration induced pressure detection, hydraulic resonance detection and pulsation dampener performance may be measured and selected parameters displayed on a visual display connected to the processor directly or via a network.
    Type: Application
    Filed: February 21, 2003
    Publication date: August 26, 2004
    Inventor: J. Davis Miller
  • Patent number: D626819
    Type: Grant
    Filed: May 5, 2009
    Date of Patent: November 9, 2010
    Inventors: J. Davis Miller, Jason R. Ahlgren