Patents by Inventor Robert R. Piepho

Robert R. Piepho 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).

  • Method for making an improved main shaft for a coal pulverizer by employing a ceramic coating thereon
    Patent number: 6381829
    Abstract: An improved main shaft for a coal pulverizer having a selected portion of the main shaft provided with an intervening material such as a thermally sprayed ceramic coating.
    Type: Grant
    Filed: August 6, 2001
    Date of Patent: May 7, 2002
    Assignee: The Babcock & Wilcox Company
    Inventors: Robert R. Piepho, David W. Gerber
  • Strain relief main shaft
    Patent number: 6347758
    Abstract: An improved main shaft and assembly for a coal pulverizer having a circumferential groove at a predetermined location on the main shaft and in the yoke bushing to provide improved fretting resistance to reduce the occurrence of main shaft failure.
    Type: Grant
    Filed: July 22, 1997
    Date of Patent: February 19, 2002
    Assignee: The Babcock & Wilcox Company
    Inventors: Ronald D. Mizak, Robert R. Piepho
  • Relief main shaft assembly
    Publication number: 20010054659
    Abstract: An improved main shaft for a coal pulverizer having a selected portion of the main shaft provided with an intervening material such as a thermally sprayed ceramic coating.
    Type: Application
    Filed: August 6, 2001
    Publication date: December 27, 2001
    Inventors: Robert R. Piepho, David W. Gerber
  • Strain relief main shaft assembly
    Patent number: 6270026
    Abstract: An improved main shaft for a coal pulverizer having a selected portion of the main shaft provided with an intervening material such as a thermally sprayed ceramic coating.
    Type: Grant
    Filed: June 5, 1997
    Date of Patent: August 7, 2001
    Assignee: The Babcock & Wilcox Company
    Inventors: Robert R. Piepho, David W. Gerber
  • Strain relief main shaft assembly
    Patent number: 6132135
    Abstract: An improved main shaft for a coal pulverizer having a selected portion of the main shaft nitride treated and a dry film lubricant applied to the yoke end.
    Type: Grant
    Filed: November 1, 1996
    Date of Patent: October 17, 2000
    Assignee: McDermott Technology, Inc.
    Inventors: David W. Gerber, Robert R. Piepho
  • Dynamic classifier with hollow shaft drive motor
    Patent number: 5884776
    Abstract: A dynamic classifier for a coal pulverizer has an improved drive mechanism which is mounted on top of a pulverizer and concentric with the classifier axis of rotation and is directly controllable. The drive mechanism is a variable-speed DC or AC electric motor having a hollow motor shaft. The motor can produce classifier rotor rotational speeds of between 50 and 200 rpm. The classifier rotor is supported from the hollow motor shaft. A coal feed pipe passes through the hollow motor shaft and classifier rotor shaft into the pulverizer.
    Type: Grant
    Filed: April 4, 1997
    Date of Patent: March 23, 1999
    Assignee: The Babcock & Wilcox Company
    Inventors: Robert R. Piepho, Donald R. Dougan
  • Asymmetric pulverizer tire
    Patent number: 5346148
    Abstract: Reinforcement sections are provided at an outer surface and at an inner surface of a tire for a roll wheel assembly used in a pulverizer for crushing a material such as coal. These reinforcing sections cause the tire to be asymmetrical and are located on the tire only at areas where the wearing of the tire is highly predictable. The reinforcing sections provided on the inner surfaces of the tire are provided directly opposite of the reinforcing sections on the outer surface for preventing the localized thinning of the tire and extending the time interval between rotation and/or replacement of the tires.
    Type: Grant
    Filed: March 16, 1993
    Date of Patent: September 13, 1994
    Assignee: The Babcock & Wilcox Company
    Inventors: Bryan Hand, Ronald D. Mizak, Robert R. Piepho