Patents by Inventor Larry F. Knight

Larry F. Knight 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).

  • Automatic gas blending system
    Patent number: 5476115
    Abstract: A tracer gas and a carrier gas, such as helium and nitrogen, are blended using flow restrictive orifices in the flow lines for each gas. A process controller is used for automatic adjustment of a control valve in the tracer gas flow line in response to variations in pressure, temperature and flow in the flow lines.
    Type: Grant
    Filed: March 10, 1994
    Date of Patent: December 19, 1995
    Assignee: Praxair Technology, Inc.
    Inventors: Steven R. Lalumandier, Cathy J. Geary, Larry F. Knight
  • Pumper system for in-situ pigging applications
    Patent number: 5431545
    Abstract: A pumper system is adapted to enable pumps to be switched between parallel operation, for the high flow conditions normally desired for in-situ pigging operations within a line to be cleaned, and series operation, for the high pressure conditions needed in the event the pigging device becomes obstructed in the line.
    Type: Grant
    Filed: December 2, 1993
    Date of Patent: July 11, 1995
    Assignee: Praxair Technology, Inc.
    Inventors: Larry F. Knight, Bobby N. Chaffin, Ronald W. DeLorme
  • Apparatus for separating and recycling cleaning particles for cleaning furnace tubes
    Patent number: 5266169
    Abstract: A center transfer unit positioned between a solids collection chamber and a cleaning particle vessel contains vibrating inclined screens to separate chunks of waste solids from cleaning particles recycled to the cleaning particle vessel.
    Type: Grant
    Filed: June 3, 1992
    Date of Patent: November 30, 1993
    Assignee: Praxair Technology, Inc.
    Inventors: Cathy J. Geary, Joseph L. Greene, Jr., Larry F. Knight, Ronald W. DeLorme
  • High gas flow rate production
    Patent number: 4977921
    Abstract: High gas flow requirements of large size lines are conveniently provided by a series of high pressure tubes connected to header means adapted to control the storage and distribution of gas to the lines at desired flow rates for relatively short periods of time. Gas thus supplied can conveniently be used as a propelling gas stream for the in-situ cleaning of large size lines under high exit velocity conditions requiring the supply of gas at a high flow rate not conveniently supplied by conventional pumpers.
    Type: Grant
    Filed: September 20, 1989
    Date of Patent: December 18, 1990
    Assignee: Union Carbide Corporation
    Inventors: Larry F. Knight, Daniel K. Ogilvie, Ronny W. Worsham