Patents by Inventor Norbert Holle

Norbert Holle 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).

  • Control spear for use in a passage for conducting dust-containing hot gases
    Patent number: 5150729
    Abstract: A control spear serves to close and to controllably open a valve passage in a passage for conducting a dust-containing gas at temperatures of about 400.degree. to 1200.degree. C. The control spear comprises a shaft and a frustoconical head which cooperates with the valve passage. The shaft is movably mounted on the head and is preferably resiliently biased against the shaft.
    Type: Grant
    Filed: October 9, 1991
    Date of Patent: September 29, 1992
    Assignee: Metallgesellschaft AG
    Inventors: Wolfgang Frank, Johannes Loffler, Norbert Holle