Patents by Inventor Manfred Gronau

Manfred Gronau 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).

  • Respirator
    Patent number: 4233971
    Abstract: A ring-shape connecting member is disposed in an opening in the bottom of a breathing bag, where it is encircled and tightly engaged by an elastic sleeve secured to the bag around its opening and projecting downwardly out of the bag. A chemical cartridge is provided with an upwardly extending ring-shape flange projecting up into the elastic sleeve in sealing engagement with it, and the top of the cartridge within said flange is provided with an opening communicating with the connecting member.
    Type: Grant
    Filed: March 5, 1979
    Date of Patent: November 18, 1980
    Assignee: Auergesellschaft GmbH
    Inventors: Manfred Gronau, Werner Mascher, Klaus Pampuch