Patents by Inventor Stephan DEHRMANN

Stephan DEHRMANN 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: 10989505
    Abstract: A fragment-free propulsion of a cartridge-type ammunition, including a propellant casing and a high-pressure chamber, wherein the high-pressure chamber accommodates a propellant powder and, in the bottom region, a primer, having at least one overflow bore. To avoid fragments, a membrane, which separates the high-pressure chamber and a low-pressure chamber from one another and which does not tear to connect the high-pressure chamber to the low-pressure chamber when pressure is built up but instead is bent, is embedded in the high-pressure chamber. For this purpose, the high-pressure chamber additionally has a cap, the membrane, and a body. The membrane is embedded in the body and is secured by the cap. In addition, the membrane covers a gap that is formed by an outer diameter of the cap and an inner diameter of the body, and into which the membrane is bent when pressure is built up.
    Type: Grant
    Filed: November 15, 2019
    Date of Patent: April 27, 2021
    Assignee: Rheinmetall Waffe Munition GmbH
    Inventors: Hendrik Redeker, Stephan Dehrmann, Lars Dierks
  • Publication number: 20200263961
    Abstract: A fragment-free propulsion of a cartridge-type ammunition, including a propellant casing and a high-pressure chamber, wherein the high-pressure chamber accommodates a propellant powder and, in the bottom region, a primer, having at least one overflow bore. To avoid fragments, a membrane, which separates the high-pressure chamber and a low-pressure chamber from one another and which does not tear to connect the high-pressure chamber to the low-pressure chamber when pressure is built up but instead is bent, is embedded in the high-pressure chamber. For this purpose, the high-pressure chamber additionally has a cap, the membrane, and a body. The membrane is embedded in the body and is secured by the cap. In addition, the membrane covers a gap that is formed by an outer diameter of the cap and an inner diameter of the body, and into which the membrane is bent when pressure is built up.
    Type: Application
    Filed: November 15, 2019
    Publication date: August 20, 2020
    Applicant: RHEINMETALL WAFFE MUNITION GMBH
    Inventors: Hendrik REDEKER, Stephan DEHRMANN, Lars Christian DIERKS