Patents by Inventor David J Williamson

David J Williamson 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).

  • Publication number: 20030229823
    Abstract: The present invention provides a data processing apparatus and method for generating trace signals. The data processing apparatus comprises a component whose behaviour is to be traced, and a trace generation unit for receiving input signals from the component indicative of the behaviour, and for generating from the input signals high priority and low priority trace signals for outputting to a trace receiving device. The trace generation unit is responsive to assertion of a suppression signal from the trace receiving device to suppress generation of the low priority trace signals, with the aim of avoiding overflow of the trace receiving device.
    Type: Application
    Filed: July 29, 2002
    Publication date: December 11, 2003
    Inventors: Andrew B. Swaine, David J. Williamson
  • Patent number: 6134907
    Abstract: A remote ice-making machine is disclosed having a compressor unit remote from an evaporator unit, a supply line for transferring refrigerant from the compressor unit to the remote evaporator unit, and a return line for returning refrigerant from the evaporator unit to the compressor unit during an ice-making mode. The preferred evaporator unit has an ice-forming evaporator and a heating unit, as well as a valve for controlling the flow of refrigerant into the evaporator unit. A method for making ice with the remote ice-making unit is also disclosed.
    Type: Grant
    Filed: April 26, 1999
    Date of Patent: October 24, 2000
    Assignee: Manitowoc Foodservice Group, Inc.
    Inventors: Lee G. Mueller, Howard G. Funk, Timothy J. Kraus, Steven P. Kutchera, Gregory McDougal, David J. Williamson
  • Patent number: 5953925
    Abstract: A remote ice-making machine is disclosed having a compressor unit remote from an evaporator unit, a supply line for transferring refrigerant from the compressor unit-to the remote evaporator unit, and a return line for returning refrigerant from the evaporator unit to the compressor unit during an ice-making mode. The preferred evaporator unit has an ice-forming evaporator and a heating unit, as well as a valve for controlling the flow of refrigerant into the evaporator unit. A method for making ice with the remote ice-making unit is also disclosed.
    Type: Grant
    Filed: July 8, 1998
    Date of Patent: September 21, 1999
    Assignee: Manitowoc Foodservice Group, Inc.
    Inventors: Lee G. Mueller, Howard G. Funk, Timothy J. Kraus, Steven P. Kutchera, Gregory McDougal, David J. Williamson
  • Patent number: 5787723
    Abstract: A remote ice-making machine is disclosed having a compressor unit remote from an evaporator unit, a supply line for transferring refrigerant from the compressor unit to the remote evaporator unit, and a return line for returning refrigerant from the evaporator unit to the compressor unit during an ice-making mode. The preferred evaporator unit has an ice-forming evaporator and a heating unit, as well as a valve for controlling the flow of refrigerant into the evaporator unit. A method for making ice with the remote ice-making unit is also disclosed.
    Type: Grant
    Filed: November 12, 1996
    Date of Patent: August 4, 1998
    Assignee: Manitowoc Foodservice Group, Inc.
    Inventors: Lee G. Mueller, Howard G. Funk, Timothy J. Kraus, Steven P. Kutchera, Gregory McDougal, David J. Williamson
  • Patent number: 5137934
    Abstract: This invention relates to alkylene oxide adducts prepared by alkoxylating an initiator, containing polymerized ethylene oxide, with a C.sub.3 or higher alkylene oxide, and polyurethane foams prepared therefrom. The invention offers the advantage of preparing alkylene oxide adducts and polyurethane foams with acceptable properties, where the availability or the possibility of conducting an alkoxylation reaction with ethylene oxide is restricted or not at all feasible.
    Type: Grant
    Filed: September 29, 1989
    Date of Patent: August 11, 1992
    Assignee: The Dow Chemical Company
    Inventors: David J. Williamson, Matthijs van den Engh