Patents by Inventor Wilfried Durth

Wilfried Durth 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: 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: 6600288
    Abstract: A cooking device having a cooking chamber, a motor unit for driving a fan for purposes of circulating cooking chamber atmospheres in the cooking chamber, a control and regulator unit cooperating with the motor unit and a voltage phase and frequency converter which has power supply connections for the input of a.c. voltage signals L1 and at least one connection to the control and regulator unit and an output connection for transmitting three-phase voltage signals U, V and W with adjustable amplitude, frequency and phase to the motor unit.
    Type: Grant
    Filed: July 5, 2001
    Date of Patent: July 29, 2003
    Assignee: Rational Aktiengesellschaft
    Inventors: Wilfried Durth, Erwin Schuller
  • Patent number: 6595112
    Abstract: A cooking device which has at least one water feeder, at least one drain and at least one exhaust connected to the cooking chamber includes an arrangement for registering and measuring the amount of water that is supplied to the cooking device and the amount of liquid being discharged from the cooking device in the form of water, steam and moisture.
    Type: Grant
    Filed: July 3, 2001
    Date of Patent: July 22, 2003
    Assignee: Rational Aktiengeselleshaft
    Inventor: Wilfried Durth
  • Patent number: 6478034
    Abstract: A method and apparatus for cleaning a cooking chamber of a cooking apparatus has at least one nozzle pivotably connected to a base, which is detachably connected on a wall of the cooking chamber in an area of a supply line for a liquid which is forced through each spray nozzle to cause a rotation of the nozzle and a pivoting of the nozzle around a pivot point to spray surfaces of the cooking chamber.
    Type: Grant
    Filed: June 13, 2001
    Date of Patent: November 12, 2002
    Assignee: Rational AG
    Inventors: Wilfried Durth, Lorenz Scholl, Hubert Brunner
  • Publication number: 20020017199
    Abstract: A cooking device which has at least one water feeder, at least one drain and at least one exhaust connected to the cooking chamber includes an arrangement for registering and measuring the amount of water that is supplied to the cooking device and the amount of liquid being discharged from the cooking device in the form of water, steam and moisture.
    Type: Application
    Filed: July 3, 2001
    Publication date: February 14, 2002
    Inventor: Wilfried Durth
  • Publication number: 20020014875
    Abstract: A cooking device having a cooking chamber, a motor unit for driving a fan for purposes of circulating cooking chamber atmospheres in the cooking chamber, a control and regulator unit cooperating with the motor unit and a voltage phase and frequency converter which has power supply connections for the input of a.c. voltage signals L1 and at least one connection to the control and regulator unit and an output connection for transmitting three-phase voltage signals U, V and W with adjustable amplitude, frequency and phase to the motor unit.
    Type: Application
    Filed: July 5, 2001
    Publication date: February 7, 2002
    Inventors: Wilfried Durth, Erwin Schuller
  • 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: 5462404
    Abstract: An arrangement for an air supply in a radial fan or blower comprising an air guide arrangement disposed in the intake region of the fan or blower. The air guide arrangement comprises at least two baffle regions lying diametrically opposite one another and symmetrically relative to one another with respect to a plane of symmetry of the intake region that contains the rotational axis of the fan or blower, the edges of the air baffle regions neighboring the fan lying within the aperture clearance of the fan and the air baffle regions extending obliquely outward from these edges in relationship to the plane of symmetry of the intake region.
    Type: Grant
    Filed: April 18, 1994
    Date of Patent: October 31, 1995
    Assignee: Rational GmbH
    Inventor: Wilfried Durth
  • Patent number: 4800806
    Abstract: The conversion operation of a cooking apparatus which is initially operated using heated air at approximately 250.degree. C. to an operation using water vapor is made possible in a short period of time and without danger by lowering the temperature to approximately 100.degree. C. in the cooking space wall prior to steam or water vapor operation.
    Type: Grant
    Filed: January 8, 1987
    Date of Patent: January 31, 1989
    Assignee: Buderus Aktiengesellschaft
    Inventor: Wilfried Durth
  • Patent number: 4701334
    Abstract: The conversion operation of a cooking apparatus which is initially operated using heated air at approximately 250.degree. C., to an operation using water vapor is made possible in a short period of time and without danger by lowering the temperature to approximately 100.degree. C. in the cooking space wall prior to steam or water vapor operation.
    Type: Grant
    Filed: November 21, 1985
    Date of Patent: October 20, 1987
    Assignee: Buderus Aktiengesellschaft
    Inventor: Wilfried Durth
  • Patent number: 4058635
    Abstract: An article of food is heated in an oven in which air is circulated. Moisture in the form of steam or a water spray is added to the air as it circulated several times during the cooking or thawing cycle according to a program. Each moisture dose and the length of the interval between doses is controlled independently according to the treatment desired. The first dose is made after the cooking cycle is started, and the dosing time is usually a fraction of the time between doses.
    Type: Grant
    Filed: December 5, 1975
    Date of Patent: November 15, 1977
    Assignee: Buderus'sche Eisenwerke Aktiengesellschaft
    Inventor: Wilfried Durth
  • Patent number: 3978843
    Abstract: A food cooking oven has a closed muffle in which there is provided an axial-input radial-output blower that is rotated by a drive motor outside the housing so as to circulate gases in the housng in a closed path passing through the blower. At least one vane is provided in the housng at one of the sides of the blower so as to limit air circulation therein and prevent excessively strong currents of air in the housing from damaging delicate foodstuffs. This may be a disc vane in front of the axial input of the blower or a pair of elongaged vanes flanking the blower at the output sides thereof.
    Type: Grant
    Filed: January 6, 1975
    Date of Patent: September 7, 1976
    Assignee: Buderus'sche Eisenwerke Aktiengesellschaft
    Inventor: Wilfried Durth