Patents by Inventor Erwin Postenreider

Erwin Postenreider 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).

  • Draft control arrangement
    Patent number: 4294401
    Abstract: A draft control arrangement for use with a gas-fired heating apparatus. The flow of waste gas through a draft hood of the apparatus is throttled by bimetal element means which responds to temperature change for reducing or enlarging the throttle area. Control means is provided for causing the rate of throttle area change during a certain phase of operation to vary from the rate of throttle area change during other phases of operation.
    Type: Grant
    Filed: April 9, 1979
    Date of Patent: October 13, 1981
    Inventors: Werner Diermayer, Luitpold Kutzner, Erwin Postenreider
  • Draft control arrangement
    Patent number: 4249694
    Abstract: A draft control arrangement for use with a gas-fired heating apparatus. The flow of waste gas through a draft hood of the apparatus is throttled by bimetal element means which responds to temperature change for reducing or enlarging the throttle area. Control means is provided for causing the rate of throttle area change during a certain phase of operation to vary from the rate of throttle area change during other phases of operation.
    Type: Grant
    Filed: April 9, 1979
    Date of Patent: February 10, 1981
    Inventors: Werner Diermayer, Luitpold Kutzner, Erwin Postenreider