Patents by Inventor Peter Wiedemann

Peter Wiedemann 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).

  • Patent number: 6660100
    Abstract: In a process for removing the paint from plastic components provided with coats of paint, the plastic components are first crushed to a bulk material size of the crushed plastic pieces. The plastic pieces are subsequently mixed with a paint removing agent reducing the adhesion of the coats of paint to the plastic pieces, and circulated by means of a conveyor screw. The paint removing agent is formed in this connection by an emulsion consisting of at least one benzyl-substituted alkanol and an alkyl-glycol acetate or N-alkyl-pyrrolidone with an aqueous lye, which can not be completely mixed. The mixing ratio for mixing the individual components is selected so that it is in the range of a mixing gap. After the paint removing agent has acted upon the painted plastic pieces, a solid substance is added to the paint remover so that the further steps of the method can be carried out in a dry state.
    Type: Grant
    Filed: October 23, 2001
    Date of Patent: December 9, 2003
    Inventor: Peter Wiedemann
  • Publication number: 20030192436
    Abstract: The invention relates to a method for the generation of steam, in particular for a cooking device, whereby a fluid within a steam generator container is brought to the boil, by the heating of at least one heatable wall surface (12) of the steam generator container. Said fluid is set in rotation by the heating and thus pressed against the heatable wall surface (12), due to centrifugal forces arising from the rotation. The steam generated as a result of the evaporation of at least a part of the fluid escapes from the steam generator container through a steam outlet and droplets of fluid entrained in the steam are separated out by at least one first rotor (8), rotatably mounted in the steam generator container, whereby the fluid is set in rotation by said rotor. The invention further relates to a device using the above method.
    Type: Application
    Filed: February 7, 2003
    Publication date: October 16, 2003
    Inventors: Thomas Schreiner, Peter Kohlstrung, Bruno Maas, Peter Wiedemann, Elmar Junker
  • Patent number: 6626190
    Abstract: In a method and an apparatus for automatically cleaning at least the cooking chamber of a cooking device upon use of a fluid, the fluid is selected from a first fluid comprising cleaning agent, rinse agent, decalcification agent, water and/or the like, and/or from a second fluid that is acquired from the third fluid discharging from the cooking chamber during cleaning on the basis of at least partial cleaning thereof. At least one spray head is provided to which the first fluid from at least a first reservoir and/or the second fluid can be supplied via a line system from a processing unit connected to the discharge conduit of the cooking chamber. The processing unit has at least a second reservoir, a cleaning unit, and a pump unit.
    Type: Grant
    Filed: December 14, 2000
    Date of Patent: September 30, 2003
    Assignee: Rational Aktiengesellschaft
    Inventors: Wilfried Durth, Peter Wiedemann
  • Patent number: 6581588
    Abstract: An insulating glass door for a cooking chamber of a cooking appliance is formed by an insulating glass window composed of two individual panes which are spaced apart for forming an interspace therebetween, which is sealed by an insulating material. The door includes at least one door component which is integrated and extends between the two spaced-apart panes.
    Type: Grant
    Filed: July 19, 2001
    Date of Patent: June 24, 2003
    Assignee: Rational Aktiengesellschaft
    Inventors: Peter Wiedemann, Willi Winter, Hermann Rabe
  • Patent number: 6410568
    Abstract: The invention relates to new compounds of the general formula: in which: R1 is C1 to C6 alkyl or aryl, R2 to R5 independently of each other are H, OH, C1 to C6 alkyl, C1 to C6 alkylene or OR6, R6 being C1 to C6 alkyl or aryl, An− is an anion and n is 1 or 2. The compounds can be used as photosensitizers for example in medicine, agriculture and industry.
    Type: Grant
    Filed: December 15, 2000
    Date of Patent: June 25, 2002
    Assignee: Astrid Schastak
    Inventors: Stanislaw Schastak, Alexander Shulga, Frieder Berr, Peter Wiedemann
  • Publication number: 20020065423
    Abstract: In a process for removing the paint from plastic components provided with coats of paint, the plastic components are first crushed to a bulk material size of the crushed plastic pieces. The plastic pieces are subsequently mixed with a paint removing agent reducing the adhesion of the coats of paint to the plastic pieces, and circulated by means of a conveyor screw. The paint removing agent is formed in this connection by an emulsion consisting of at least one benzyl-substituted alkanol and an alkyl-glycol acetate or N-alkyl-pyrrolidone with an aqueous lye, which can not be completely mixed. The mixing ratio for mixing the individual components is selected so that it is in the range of a mixing gap. After the paint removing agent has acted upon the painted plastic pieces, a solid substance is added to the paint remover so that the further steps of the method can be carried out in a dry state.
    Type: Application
    Filed: October 23, 2001
    Publication date: May 30, 2002
    Inventor: Peter Wiedemann
  • Publication number: 20020007829
    Abstract: An insulating glass door for a cooking chamber of a cooking appliance is formed by an insulating glass window composed of two individual panes which are spaced apart for forming an interspace therebetween, which is sealed by an insulating material. The door includes at least one door component which is integrated and extends between the two spaced-apart panes.
    Type: Application
    Filed: July 19, 2001
    Publication date: January 24, 2002
    Applicant: Rational AG
    Inventors: Peter Wiedemann, Willi Winter, Hermann Rabe
  • Publication number: 20020002587
    Abstract: In a method and the arrangement for determining projection data for a projection of a spatially variable area, change data are determined in a first computing unit, where the change data describe a change in the spatially variable area from a starting state to an end state. The change data are transmitted to a second computing unit and to a third computing unit, which are each connected to the first computing unit. First current projection data for a first projection of the spatially variable area are determined in the second computing unit using the change data and first previously stored projection data. Second current projection data for a second projection of the spatially variable area are determined in the third computing unit using the change data and second previously stored projection data.
    Type: Application
    Filed: August 31, 2000
    Publication date: January 3, 2002
    Applicant: Siemens Aktiengesellschaft
    Inventors: Yalin Ahmet Kecik , Thomas Ruge , Claus Peter Wiedemann
  • Patent number: 6318245
    Abstract: A cooking device has a cooking chamber, a ventilation device in the form of a ventilating fan wheel or the like and a heating device plus a catalyst. Air from the cooking chamber, including greasy vapors, odor particles, and/or hydrocarbons, can be directed in a finely-atomized form onto the catalyst by the ventilation device. The catalyst purifies the air directed thereon and releases energy in the form of heat during purification, which heat can be distributed inside the cooking chamber by the ventilation device.
    Type: Grant
    Filed: June 13, 2001
    Date of Patent: November 20, 2001
    Assignee: Rational AG
    Inventors: Wilfried Durth, Peter Wiedemann, Gerd Funk
  • Publication number: 20010011549
    Abstract: In a method and an apparatus for automatically cleaning at least the cooking chamber of a cooking device upon use of a fluid, the fluid is selected from a first fluid comprising cleaning agent, rinse agent, decalcification agent, water and/or the like, and/or from a second fluid that is acquired from the third fluid discharging from the cooking chamber during cleaning on the basis of at least partial cleaning thereof. At least one spray head is provided to which the first fluid from at least a first reservoir and/or the second fluid can be supplied via a line system from a processing unit connected to the discharge conduit of the cooking chamber. The processing unit has at least a second reservoir, a cleaning unit, and a pump unit.
    Type: Application
    Filed: December 14, 2000
    Publication date: August 9, 2001
    Inventors: Wilfried Durth, Peter Wiedemann
  • Patent number: 6267045
    Abstract: The invention relates to a cooking device with a cooking chamber, a heating device, a circulating system, an energy storage and extraction system and a measuring and regulating system connected to the heating device, the circulating system and the energy storage and extraction system.
    Type: Grant
    Filed: January 9, 2001
    Date of Patent: July 31, 2001
    Assignee: Rational AG
    Inventors: Peter Wiedemann, Peter Kohlstrung
  • Patent number: 5915372
    Abstract: A heat exchanger for a cooking chamber extends around a ventilator fan of the cooking chamber and has a burner tube connected to one end of a first portion of the heat exchanger and has a reverse bend so a second portion extends parallel to the first portion in the opposite direction. The tube is mounted by the burner and the opposite end so that the reverse bends allows for compensation of thermal expansion in the tube during a heating process.
    Type: Grant
    Filed: January 29, 1998
    Date of Patent: June 29, 1999
    Assignee: Rational GmbH
    Inventors: Peter Wiedemann, Franz Koch, Gerd Gumienny