Patents by Inventor Holger Kuhnau
Holger Kuhnau 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).
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Publication number: 20150176896Abstract: In a method for drying and/or crystallizing bulk material, a drying medium is passed through bulk material present in a drying chamber and the drying chamber with the bulk material is put under a partial vacuum at least for part of a drying time of the bulk material. A device for performing the method has at least one drying container with a drying chamber for bulk material, at least one supply line for a drying medium connected to the at least one drying container, and at least one return air line connected to the at least one drying container. At least one partial-vacuum generator is provided to put at least the drying chamber under a partial vacuum at least for part of a drying time of the bulk material.Type: ApplicationFiled: December 18, 2014Publication date: June 25, 2015Inventors: Holger Kühnau, Thomas Kaupel
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Publication number: 20110283554Abstract: Before being processed, bulk material is dried in a storage container. A drying medium such as air is passed through the bulk material for drying. The drying medium heats the bulk material and removes moisture at the same time. For dehumidifying the drying medium, a dehumidifying unit with a Peltier device is provided whose cold side and whose hot side are positioned within the flow path of the drying medium. The drying medium loaded with moisture is passed across the cold side and dehumidified. The hot side of the Peltier device is used to preheat the dehumidified drying medium.Type: ApplicationFiled: May 14, 2011Publication date: November 24, 2011Applicant: MOTAN HOLDING GMBHInventors: Holger Kühnau, Reinhard Herro
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Patent number: 6955506Abstract: A device for pneumatically conveying bulk material has at least one flow limiter arranged in a conveying airstream. The flow limiter has a housing and at least one control member arranged in the housing. The control member controls a flow velocity of the conveying airstream as a function of a dynamic pressure differential. The position of the at least one control member in the housing is determined by an equilibrium between a restoring force acting on the at least one control member and an opposed force oriented in a direction opposite to the restoring force. The opposed force is caused by the dynamic pressure differential and acts on the at least one control member.Type: GrantFiled: March 23, 2004Date of Patent: October 18, 2005Assignee: Motan Holding GmbHInventors: Holger Kühnau, Guido Mayer
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Publication number: 20040202513Abstract: A device for pneumatically conveying bulk material has at least one flow limiter arranged in a conveying airstream. The flow limiter has a housing and at least one control member arranged in the housing. The control member controls a flow velocity of the conveying airstream as a function of a dynamic pressure differential. The position of the at least one control member in the housing is determined by an equilibrium between a restoring force acting on the at least one control member and an opposed force oriented in a direction opposite to the restoring force. The opposed force is caused by the dynamic pressure differential and acts on the at least one control member.Type: ApplicationFiled: March 23, 2004Publication date: October 14, 2004Applicant: MOTAN HOLDING GMBHInventors: Holger Kuhnau, Guido Mayer
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Patent number: 6786366Abstract: A metering device for metering dry bulk material contained in a storage container has at least one metering element and a rotary drive connected to the at least one metering element. At least one outlet is provided, and the metering element feeds the dry bulk material to the outlet. The metering element transports the dry bulk material in a direction different from a horizontal direction and comprises at least one helical stay. The outlet has an outlet pipe that extends into the lower area of the storage container. The helical stay interacts with the outlet pipe for effecting transport of the dry bulk material.Type: GrantFiled: April 3, 2003Date of Patent: September 7, 2004Assignee: Motan Holding GmbHInventors: Walter Kramer, Holger Kühnau, Manfred Nowak, Paul Hodruss
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Publication number: 20030189064Abstract: A metering device for metering dry bulk material contained in a storage container has at least one metering element and a rotary drive connected to the at least one metering element. At least one outlet is provided, and the metering element feeds the dry bulk material to the outlet. The metering element transports the dry bulk material in a direction different from a horizontal direction and comprises at least one helical stay. The outlet has an outlet pipe that extends into the lower area of the storage container. The helical stay interacts with the outlet pipe for effecting transport of the dry bulk material.Type: ApplicationFiled: April 3, 2003Publication date: October 9, 2003Applicant: MOTAN HOLDING GMBHInventors: Walter Kramer, Holger Kuhnau, Manfred Nowak, Paul Hodruss
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Patent number: 6415528Abstract: A drying device for drying bulk material has one or more storage containers for the bulk material and a heating device for heating the drying air for drying the bulk material. A drying air conduit is connected to the heating device and the storage containers and guides the drying air to the storage containers. One or more first mixing valves are arranged in the drying air conduit upstream of the storage containers, wherein the first mixing valves are used to adjust the temperature of the drying air before the drying air enters the storage containers. The heating device has also the function of regenerating the drying units provided for removing the moisture from the drying air.Type: GrantFiled: June 14, 2001Date of Patent: July 9, 2002Assignee: Motan Holding GmbHInventors: Klaus Höller, Holger Kühnau, Frank Fischer, Carl Litherland
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Patent number: 6405454Abstract: A method and device for heating and/or drying flowable loose material, especially granular polymeric material, that is to be conveyed to a processing machine, such as an injection molding machine, are provided. A hot air stream that has been heated up with a heating unit is caused to flow through loose material flowing in a chamber transverse to the direction of flow of the loose material in the chamber.Type: GrantFiled: September 3, 1999Date of Patent: June 18, 2002Assignee: Motan Holding GmbHInventors: Walter Kramer, Holger Kühnau, Gerd Bevier
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Publication number: 20020007566Abstract: A drying device for drying bulk material has one or more storage containers for the bulk material and a heating device for heating the drying air for drying the bulk material. A drying air conduit is connected to the heating device and the storage containers and guides the drying air to the storage containers. One or more first mixing valves are arranged in the drying air conduit upstream of the storage containers, wherein the first mixing valves are used to adjust the temperature of the drying air before the drying air enters the storage containers. The heating device has also the function of regenerating the drying units provided for removing the moisture from the drying air.Type: ApplicationFiled: June 14, 2001Publication date: January 24, 2002Applicant: Motan Holding GmbHInventors: Klaus Holler, Holger Kuhnau, Frank Fischer, Carl Litherland
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Patent number: 5555636Abstract: A dryer has a hopper for material to be dried and an inlet line for supplying dry air to the hopper. A heating device for heating the dry air to the desired drying temperature before introduction into the hopper is provided. A return line is connected to the hopper for removing moist air from the hopper which results from the dry air passing through the material in the hopper and absorbing moisture therefrom. The return line has a part that functions as a heat exchanger. The dry air before entering the hopper is guided through the heat exchanger.Type: GrantFiled: February 24, 1995Date of Patent: September 17, 1996Assignee: Motan Holding GmbHInventors: Walter Kramer, Holger Kuhnau