Patents by Inventor Darrel J. Walker

Darrel J. Walker 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 and apparatus for controlling heat transfer for a fluid immersed vessel
    Patent number: 7069732
    Abstract: A temperature control system for maintaining a food product at an acceptable temperature having a pan with a thermally conductive wall, a first member surrounding the thermally conductive wall, and a channel being formed between the first member and the thermally conductive wall. The temperature control system has a fluid in the channel for contacting the pan at a first location and a refrigeration coil being connected to a portion of the thermally conductive wall for cooling the pan. The temperature control system further has a second member for surrounding a first portion of the thermally conductive wall. The second member and the fluid maximize heat transfer at a first portion of the thermally conductive wall. The second member minimizes heat transfer at a second location of the thermally conductive wall.
    Type: Grant
    Filed: June 23, 2004
    Date of Patent: July 4, 2006
    Assignee: The Delfield Company
    Inventors: Darrel J. Walker, Wayne W. Smith
  • Fastener
    Patent number: D626825
    Type: Grant
    Filed: September 2, 2009
    Date of Patent: November 9, 2010
    Assignee: The Delfield Company LLC
    Inventors: Darrel J. Walker, Amy R. Cashen