Patents by Inventor Friedhelm Burger

Friedhelm Burger 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: 5158196
    Abstract: A blanking plug is used for sealing provisionally connection openings (3) of non-installed liquid-operated units, in particular of oil-hydraulic systems (1) for motor vehicles. A section (12) of the blanking plug (10) is inserted into, and fills up, the connection opening (3). The section (12) is provided with a hollow space communicating with a closed portion of the connection opening (3). The hollow space is filled with a material tending to absorb the respective liquid, for example a tampon (17).
    Type: Grant
    Filed: September 6, 1990
    Date of Patent: October 27, 1992
    Assignee: Berger & Partner GmbH
    Inventor: Friedhelm Burger
  • Patent number: 4634160
    Abstract: A handle fitting for a drive rod locking arrangement for windows, doors and the like, in which a drive rod actuating lever (4) is mounted in a housing (1) for pivotal movement about an axis B and an actuating handle is rotatable about an axis A intersecting the axis B. The drive shaft of the operating handle includes a coupling portion (20) having a concentric shoulder (24) engaging in an opening (12) to retain the lever (4) in place and a crank (19) engages in a slot (18) in a laterally movable drive slide having a projection (17), so that lateral movement of the slide caused by the crank (19) effects pivotal movement of the lever (4).
    Type: Grant
    Filed: October 26, 1984
    Date of Patent: January 6, 1987
    Assignee: Mila Hardware & Machinery (UK) Limited
    Inventors: Ernst Lahmann, Werner Walder, Friedhelm Burger
  • Patent number: 4033564
    Abstract: A crucible for melting, and particularly for heat retention and pouring of metals, in particular light metal- or zinc- alloys, with a heat source arranged inside of the melt. A heat source tube extends in a bridge-like manner between the crucible walls, with heating elements entering from a front end of the heat source tube.
    Type: Grant
    Filed: February 5, 1976
    Date of Patent: July 5, 1977
    Assignee: Wilh. Engstfeld, a Kommanditgesellschaft
    Inventors: Paul Junghanns, Friedhelm Burger