Patents by Inventor Hardy Lessmeister

Hardy Lessmeister 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: 11007533
    Abstract: A material-bed roller mill including two adjacently arranged rollers which are oriented in an axially parallel manner and which rotate in opposite directions and between which a roller gap is formed, a foundation, two roller mountings, in each of which a roller is rotatably mounted, each roller mounting being secured to the foundation in a pivotal manner; and a clamping device. The clamping device is arranged outside of the roller gap and connects the two roller mountings. Each roller mounting has two rockers which are designed as separate components and each of which is arranged at an end of a roller and can be deflected independently of the other.
    Type: Grant
    Filed: June 15, 2016
    Date of Patent: May 18, 2021
    Assignee: GEBR. PFEIFFER SE
    Inventors: Dirk Hoffmann, Ralf Frankenberger, Karl-Heinz Schütte, Hardy Lessmeister, Lukas Schmitt
  • Publication number: 20180272355
    Abstract: The invention relates to a material-bed roller mill comprising the following: two adjacently arranged rollers which are oriented in an axially parallel manner in a base state and rotate in opposite directions and between which a roller gap is formed; a foundation; two roller mountings, in each of which a roller is rotatably mounted, each roller mounting being secured to the foundation in a pivotal manner; and a clamping device which acts on the roller gap and which is arranged outside of the roller gap and connects the two roller mountings together. Each roller mounting has two rockers which are designed as separate components and each of which is arranged at an end of a roller and can be deflected independently of the other.
    Type: Application
    Filed: June 15, 2016
    Publication date: September 27, 2018
    Inventors: Dirk HOFFMANN, Ralf FRANKENBERGER, Karl-Heinz SCHÜTTE, Hardy LESSMEISTER, Lukas SCHMITT
  • Patent number: 8172168
    Abstract: A roller grinding mill is provided that includes a grinding plate, grinding rollers, and at least two drives acting upon the grinding plate, and to a method for operating such a roller grinding mill. At least one grinding roller and substantially simultaneously at least one matching drive can be disengaged during operation. Thus only small radial forces are created that effect the radial bearing of the grinding plate.
    Type: Grant
    Filed: September 20, 2010
    Date of Patent: May 8, 2012
    Assignee: Gebr. Pfeiffer AG
    Inventors: Dirk Hoffmann, Otto Jung, Karl-Heinz Schuette, Hardy Lessmeister, Thomas Hoster
  • Publication number: 20110068203
    Abstract: A roller grinding mill is provided that includes a grinding plate, grinding rollers, and at least two drives acting upon the grinding plate, and to a method for operating such a roller grinding mill. At least one grinding roller and substantially simultaneously at least one matching drive can be disengaged during operation. Thus only small radial forces are created that effect the radial bearing of the grinding plate.
    Type: Application
    Filed: September 20, 2010
    Publication date: March 24, 2011
    Inventors: Dirk HOFFMANN, Otto Jung, Karl-Heinz Schuette, Hardy Lessmeister, Thomas Hoster
  • Publication number: 20090314866
    Abstract: A roller mill is provided that includes a housing, a grinding plate with a drive, and grinding rollers which roll down on the grinding plate, wherein rockers and rocker axes are provided for each grinding roller, as well as tensioning devices having hydraulic cylinders for pressing the grinding rollers onto the grinding plate. A swivel device having a swivel axis is provided for each grinding roller. The hydraulic cylinders are capable of swiveling the grinding rollers out of the housing. The grinding rollers are mounted next to the mill housing on consoles, and the hydraulic cylinders are located next to the consoles.
    Type: Application
    Filed: June 22, 2009
    Publication date: December 24, 2009
    Inventors: Dirk Hoffmann, Otto Jung, Karl-Heinz Schuette, Hardy Lessmeister, Ralf Frankenberger