Patents by Inventor Franz Rohrl

Franz Rohrl 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).

  • Baking oven
    Patent number: 4357522
    Abstract: Baking oven including chamber walls defining a baking oven chamber, a door for closing off the chamber, a broiler heating element and at least one further heating element being disposed in vicinity of opposite chamber walls, and air blowing and guiding means disposed between the heating elements for generating an air stream being in the middle of the chamber and at least approximately parallel to and maintained at a given distance from the chamber walls.
    Type: Grant
    Filed: December 17, 1980
    Date of Patent: November 2, 1982
    Assignee: Bosch-Siemens Hausgerate GmbH
    Inventors: Julius Husslein, Franz Rohrl, Karl Nitzinger, Josef Gerl
  • Method and apparatus for baking food in a closed cooking space in which heated air is circulated
    Patent number: 4051347
    Abstract: A method and apparatus for baking food in a closed cooking space in which heated air is circulated. The temperature of this heated air is varied about a predetermined mean temperature value by generating a plurality of sequential heat radiation pulses, by means of electric air heaters or the like, of a predetermined amplitude, frequency, and duration for baking the food with a minimum of soiling of the cooking space.
    Type: Grant
    Filed: June 15, 1976
    Date of Patent: September 27, 1977
    Assignee: Siemens Aktiengesellschaft
    Inventors: Franz Rohrl, Josef Ackermann, Heinrich Detterbeck
  • Method for baking food in a closed cooking space in which heated air is circulated
    Patent number: 3984578
    Abstract: A method and apparatus for baking food in a closed cooking space in which heated air is circulated. The temperature of this heated air is varied in a sawtooth fashion about a predetermined mean temperature value by generating a plurality of sequential heat radiation pulses, by means of electric air heaters or the like, of a predetermined amplitude, frequency, and duration for baking the food with a minimum of soiling of the cooking space.
    Type: Grant
    Filed: November 26, 1973
    Date of Patent: October 5, 1976
    Assignee: Siemens Electrogerate GmbH
    Inventors: Franz Rohrl, Josef Ackermann, Heinrich Detterbeck