Patents by Inventor Hans-Hermann Potthoff

Hans-Hermann Potthoff 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).

  • Mass and spring systems for soundproofing
    Patent number: 5088576
    Abstract: A mass and spring system for soundproofing, particularly in vehicles, comprises a bending-soft heavy plastic layer as the mass and a soft layer as the spring, which is applied to the sound radiating surface or wall and which is a gel of 10 to 50% by weight of an organic polymer or silicone polymer and 50 to 90% by weight of a plasticizer compatible therewith, which at room temperature has a modulus of elasticity E'.ltoreq.5.times.10.sup.5 Pa and an internal loss factor d.gtoreq.0.5.
    Type: Grant
    Filed: July 12, 1989
    Date of Patent: February 18, 1992
    Assignee: E.A.P. Akustik GmbH
    Inventors: Hans-Hermann Potthoff, Ingolf Scheffler, Klaus Ruch, Rainer Joesel