Patents by Inventor Horst Hegenbart

Horst Hegenbart 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: 4105097
    Abstract: A locking device for a lift having an arm pivotably mounted for horizontal movement about a lifting carriage with two tubular members each pivotably connected at one end to the arm. One of the tubular members extends into a cylindrical housing and is locked thereto by balls mounted in ball cages urged by a spring to a locking position. The other tubular member is locked to the first tubular member by similar balls, cages and spring. A sleeve longitudinally slidably exterior to the two tubular members includes pins for engaging the ball cages to release the two tubular members.
    Type: Grant
    Filed: May 2, 1977
    Date of Patent: August 8, 1978
    Assignee: Gebr. Hofmann GmbH & Co. KG, Maschinenfabrik
    Inventor: Horst Hegenbart
  • Patent number: 3967701
    Abstract: A lifting apparatus of the type having a number of columns supporting a load platform each column driven by an electrical, polyphase current motor whereby sensors on each column, for example potentiometers, produce a signal indicating the height of that column. The signals are applied to a comparator which in turn provides an output to one or more electronic switches, such as a triac or thyristor having a diode connected in parallel with it for conducting current in an opposite direction, each such switch connected to a winding of a motor to control the current applied so as to reduce any difference in height among the columns.
    Type: Grant
    Filed: October 9, 1974
    Date of Patent: July 6, 1976
    Assignee: Gebr. Hofmann KG
    Inventor: Horst Hegenbart