Patents by Inventor Albert W. Maier

Albert W. Maier 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).

  • Evaporator pressure regulator control and diagnostics
    Patent number: 7669432
    Abstract: A method includes cycling an electronic evaporator pressure regulator valve fluidly coupled to a refrigeration circuit to regulate flow through the electronic evaporator pressure regulator valve and sensing a current drawn by the electronic evaporator pressure regulator valve during cycling of the electronic evaporator pressure regulator valve. The method further includes determining a valve condition of the electronic evaporator pressure regulator valve based on the sensing.
    Type: Grant
    Filed: October 18, 2007
    Date of Patent: March 2, 2010
    Assignee: Emerson Retail Services, Inc.
    Inventors: Albert W. Maier, John R. Aggers, Robert A. Kensinger, Richard P. Vogh, III, Timothy D. Campbell, Scott M. Gelber
  • Evaporator pressure regulator control and diagnostics
    Patent number: 7287396
    Abstract: An apparatus for refrigeration system control includes a plurality of circuits, each circuit having at least one refrigeration case and an electronic evaporator pressure regulator in communication with each circuit. Each electronic evaporator pressure regulator controls a temperature of one of the circuits. A sensor in communication with each circuit measures a parameter from the circuit. A controller associated with each electronic evaporator pressure regulator controls the respective electronic evaporator pressure regulator based upon measured parameters from each of the circuits.
    Type: Grant
    Filed: March 15, 2005
    Date of Patent: October 30, 2007
    Assignee: Computer Process Controls, Inc.
    Inventors: Albert W. Maier, John R. Aggers, Robert A. Kensinger, Richard P. Vogh, III, Timothy D. Campbell, Scott M. Gelber