Patents Assigned to CWW-Gerko Akustik GmbH
  • Method for producing and magnetising a bitumen film containing magnetic powder
    Patent number: 7344653
    Abstract: A bitumen film containing magnetic powder is heated prior to magnetization to a temperature enabling the magnetic powder particles to be oriented according to the effect of the magnetic field. The bitumen film is sufficiently cooled after magnetization in order to preserve the magnetization, whereby the orientation of the magnetic powder particles, which is adjusted during magnetization, is maintained.
    Type: Grant
    Filed: June 25, 2002
    Date of Patent: March 18, 2008
    Assignee: CWW-Gerko Akustik GmbH
    Inventors: Josef Polak, Christoph Freist, Gerd Mannebach, Ernst Hotz, Joachim Oster
  • Multilayer molded element
    Patent number: 6953205
    Abstract: A multilayer molded element (1) is molded to an appropriate shape which conforms to an underside of floor areas or wheel housings of a vehicle. The multilayer structure includes a non-woven, resilient layer (3) which functions as a shock absorber and spring to absorb impact and damp noise. The resilient layer is disposed between cover layers (4, 5). Optionally, fabric layers (6, 7) are bonded to outsides of the cover layers.
    Type: Grant
    Filed: May 12, 2001
    Date of Patent: October 11, 2005
    Assignee: CWW-Gerko Akustik GmbH
    Inventors: Christoph Friest, Georg Eichhorn, Meinolf Seifert, Ralf Dopheide
  • Acoustically effective bituminous mass for hot application, method for the production thereof, and bituminous sheet material made therefrom
    Patent number: 6319968
    Abstract: An acoustically effective, bituminous mass which can be applied hot by means of a flat extrusion mold contains an addition of a thermosetting resin or thermosetting reagent combination, plus bitumen, polymers and/or wax as well as fillers such as aluminum powder or zinc powder, powdered graphite or mica powder. This addition is added to the mass at temperatures under 125° C., so that the polymerization reaction does not occur until a subsequent heating.
    Type: Grant
    Filed: May 14, 1999
    Date of Patent: November 20, 2001
    Assignee: CWW-Gerko Akustik GmbH & Co. KG
    Inventors: Karlheinz Bildner, Zdislaw Kornacki
  • Apparatus for applying padding, especially acoustically active padding
    Patent number: 6199613
    Abstract: An apparatus for applying a pad to a component has a flexible diaphragm held in a continuous frame for holding the pad. On its front side which faces the component when the apparatus is in use, the frame has a circumferential, resilient gasket. Through a vacuum connection, a space between the diaphragm and the component is to be attached to a vacuum source. By that the pad applies itself against the component.
    Type: Grant
    Filed: March 18, 1999
    Date of Patent: March 13, 2001
    Assignee: CWW-GERKO Akustik GmbH & Co. KG
    Inventor: Alain Petillon
  • Sound deadening laminate
    Patent number: 6152259
    Abstract: A noise-deadening laminate board configured for noise deadening having a bituminous layer more than 1 mm thick, bonded to one side of a thermal insulation layer of foam, felt or the like, and an adhesive layer on the other side of the thermal insulation layer for adhesion to a component to be improved acoustically, the bituminous layer, thereby being located on the outer side of the laminate board.
    Type: Grant
    Filed: January 26, 1999
    Date of Patent: November 28, 2000
    Assignee: CWW-GERKO Akustik GmbH & Co., KG
    Inventors: Christoph Freist, Josef Polak
  • Brake pads and process for their production
    Patent number: 5823301
    Abstract: A brake pad has a support made of two metal sheets bonded together by a damping layer. The damping layer is formed exclusively from a crosslinked plastic adhesive in a thickness of about 75 .mu.m to 100 .mu.m, and is either a peroxide-crosslinked polyacrylate or a peroxide-crosslinked silicone adhesive.
    Type: Grant
    Filed: December 10, 1996
    Date of Patent: October 20, 1998
    Assignee: CWW-Gerko Akustik GmbH & Co. KG
    Inventors: Karlheinz Bildner, Christoph Freist