Patents by Inventor Dennis Shaffer

Dennis Shaffer 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: 20050160749
    Abstract: A control system and method for interactive startup and shutdown of a steam turbine driven chiller unit is provided. The chiller unit includes an integrated central control panel to control operation of both the steam turbine system and the refrigerant system. The central control panel has startup control system to assist an operator manually start the steam turbine system and the refrigerant system and a shutdown control system to assist an operator manually shutdown the steam system and the refrigerant system. Both the startup control system and the shutdown control system include logic for performing necessary protective actions and for notifying an operator when to perform required actions.
    Type: Application
    Filed: December 17, 2004
    Publication date: July 28, 2005
    Inventors: Dennis Shaffer, Russell Thompson
  • Publication number: 20050160748
    Abstract: A control system for a steam turbine driven chiller unit is provided. The control system automatically utilizes the full range of the governor, compressor pre-rotation vanes, and hot gas bypass valve capabilities to control the capacity of the chiller and provide anti-surge and override control functions to prevent undesirable operational ranges while maintaining maximum efficiency of operation.
    Type: Application
    Filed: December 17, 2004
    Publication date: July 28, 2005
    Inventors: Dennis Shaffer, Russell Thompson, Stephen Kachmar, Eric Smyder, Brenda Roberts, Daniel Petroskie, Ryan Eisensmith
  • Publication number: 20050160750
    Abstract: A control system and method are provided for the automatic startup and shutdown of a steam turbine driven chiller unit. The chiller unit includes an integrated central control panel to control operation of both the steam turbine system and the refrigerant system. The central control panel has a startup control system to automatically start the steam turbine driven chiller unit while performing necessary protective actions and a shutdown control system to automatically stop the steam turbine driven chiller unit while performing necessary protective actions.
    Type: Application
    Filed: December 17, 2004
    Publication date: July 28, 2005
    Applicant: YORK INTERNATION CORPORATION
    Inventors: Dennis Shaffer, Russell Thompson