Patents by Inventor John M. Hodapp

John M. Hodapp 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).

  • Locomotive air conditioner control system and related methods
    Publication number: 20010045101
    Abstract: A locomotive cab air conditioning method involves providing a multi-speed motor operable in at least a first speed state and a second speed state, the motor connected for driving a refrigerant compressor from a companion alternator output of the locomotive. An operating speed of a locomotive engine is monitored, and operation of the motor in one of the speed states is established based at least in part upon the monitored locomotive engine speed.
    Type: Application
    Filed: February 8, 2001
    Publication date: November 29, 2001
    Inventors: Donald E. Graham, John M. Hodapp