Patents by Inventor Doug Lenz

Doug Lenz 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).

  • Mobile refrigeration system and control
    Patent number: 7266961
    Abstract: A mobile refrigeration system that includes an engine that is operable at a first speed greater than zero and a second speed greater than zero. A compressor is operable in response to the engine at a first speed and a second speed. The system also includes an evaporator, a first temperature sensor positioned to measure a first temperature, and a second temperature sensor positioned to measure a second temperature. A controller is operable to transition the engine between the first speed and the second speed in response to the first temperature exceeding a first predetermined value and the second temperature falling below a second predetermined value.
    Type: Grant
    Filed: May 4, 2006
    Date of Patent: September 11, 2007
    Assignee: Thermo King Corporation
    Inventors: Bradley M. Ludwig, Doug Lenz, Darrell Storlie, Steve Helgeson, Brian Meagher, Gary Connolly
  • Mobile refrigeration system and control
    Patent number: 7260946
    Abstract: A mobile refrigeration system that includes an engine that is operable at a first speed greater than zero and a second speed greater than zero. A compressor is operable in response to the engine at a first speed and a second speed. The system also includes an evaporator, a first temperature sensor positioned to measure a first temperature, and a second temperature sensor positioned to measure a second temperature. A controller is operable to transition the engine between the first speed and the second speed in response to the first temperature exceeding a first predetermined value and the second temperature falling below a second predetermined value.
    Type: Grant
    Filed: May 4, 2006
    Date of Patent: August 28, 2007
    Assignee: Thermo King Corporation
    Inventors: Bradley M. Ludwig, Doug Lenz, Darrell Storlie, Steve Helgeson, Brian Meagher, Gary Connolly
  • Mobile refrigeration system and control
    Publication number: 20060196211
    Abstract: A mobile refrigeration system that includes an engine that is operable at a first speed greater than zero and a second speed greater than zero. A compressor is operable in response to the engine at a first speed and a second speed. The system also includes an evaporator, a first temperature sensor positioned to measure a first temperature, and a second temperature sensor positioned to measure a second temperature. A controller is operable to transition the engine between the first speed and the second speed in response to the first temperature exceeding a first predetermined value and the second temperature falling below a second predetermined value.
    Type: Application
    Filed: May 4, 2006
    Publication date: September 7, 2006
    Applicant: Thermo King Corporation
    Inventors: Bradley Ludwig, Doug Lenz, Darrell Storlie, Steve Helgeson, Brian Meagher, Gary Connolly
  • Mobile refrigeration system and control
    Publication number: 20060196210
    Abstract: A mobile refrigeration system that includes an engine that is operable at a first speed greater than zero and a second speed greater than zero. A compressor is operable in response to the engine at a first speed and a second speed. The system also includes an evaporator, a first temperature sensor positioned to measure a first temperature, and a second temperature sensor positioned to measure a second temperature. A controller is operable to transition the engine between the first speed and the second speed in response to the first temperature exceeding a first predetermined value and the second temperature falling below a second predetermined value.
    Type: Application
    Filed: May 4, 2006
    Publication date: September 7, 2006
    Applicant: Thermo King Corporation
    Inventors: Bradley Ludwig, Doug Lenz, Darrell Storlie, Steve Helgeson, Brian Meagher, Gary Connolly
  • Mobile refrigeration system and control
    Patent number: 7080521
    Abstract: A mobile refrigeration system that includes an engine that is operable at a first speed greater than zero and a second speed greater than zero. A compressor is operable in response to the engine at a first speed and a second speed. The system also includes an evaporator, a first temperature sensor positioned to measure a first temperature, and a second temperature sensor positioned to measure a second temperature. A controller is operable to transition the engine between the first speed and the second speed in response to the first temperature exceeding a first predetermined value and the second temperature falling below a second predetermined value.
    Type: Grant
    Filed: August 31, 2004
    Date of Patent: July 25, 2006
    Assignee: Thermo King Corporation
    Inventors: Bradley M. Ludwig, Doug Lenz, Darrell Storlie, Steve Helgeson, Brian Meagher, Gary Connolly
  • Mobile refrigeration system and control
    Publication number: 20060042296
    Abstract: A mobile refrigeration system that includes an engine that is operable at a first speed greater than zero and a second speed greater than zero. A compressor is operable in response to the engine at a first speed and a second speed. The system also includes an evaporator, a first temperature sensor positioned to measure a first temperature, and a second temperature sensor positioned to measure a second temperature. A controller is operable to transition the engine between the first speed and the second speed in response to the first temperature exceeding a first predetermined value and the second temperature falling below a second predetermined value.
    Type: Application
    Filed: August 31, 2004
    Publication date: March 2, 2006
    Applicant: Thermo King Corporation
    Inventors: Bradley Ludwig, Doug Lenz, Darrell Strolie, Steve Helgeson, Brian Meagher, Gary Connolly
  • Duct system for temperature-controlled cargo containers
    Patent number: 6508076
    Abstract: A removable modular duct system for conducting air in a temperature-controlled cargo container. Temperature-controlled air produced and propelled by a refrigeration unit, is conducted along the modular duct system by one or more duct sections and a transition section that conducts air from the refrigeration unit to the duct sections. The air may be discharged laterally via lateral discharge openings in the duct sections. An end section may be coupled to the duct sections to discharge air at the end of the duct system.
    Type: Grant
    Filed: August 29, 2000
    Date of Patent: January 21, 2003
    Assignee: Thermo King Corporation
    Inventors: Randal Gast, David B. Ziegler, Doug Lenz, Ming Zhang, Verlin Wirth