Patents by Inventor Siegfried Hoener

Siegfried Hoener 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: 4918362
    Abstract: An industrial truck comprising at least one steerable wheel is to be guided in dependence on direction-controlling signals which are transmitted to the industrial truck. At a junction the truck receives a direction-controlling steering signal, which causes the at least one steerable wheel to be laterally offset from the guiding signal line until a signal equilibrium which depends on the offset has been established in the steering controller. In dependence on the distance traveled and/or on time, a resetting signal is received which causes the steering means to return to an operating condition in which the vehicle is centered over a signal guiding line to be followed. The signals are transmitted by a guiding signal line, which is buried in the ground and cooperates with a sensor, which is provided at the center of the vehicle and scans the guiding signal line so as to control the deflection of steerable wheels of the vehicle.
    Type: Grant
    Filed: December 15, 1988
    Date of Patent: April 17, 1990
    Assignee: Firma Jungheinrich Unternehmensverwaltung KG
    Inventors: Sven Christensen, Rolf Haelbich, Jurgen Hanel, Siegfried Hoener, Volker Pridat
  • Patent number: 4893693
    Abstract: A fork truck is provided with a collision-preventing safety arrangement which initiates an emergency stopping in response to a contact with or detection of an obstacle. That safety arrangement comprises a safety device which at least adjacent to a load carrier (3) encloses the space for accommodating a picked-up load (20) on a level within the height range of a human being. That safety device is designed to permit a handling of the load (20) by means of the load carrier (3) at least in a forward direction. For that purpose the safety device may comprise a confining structure, which in its operative position encloses at least the space adjacent to the load carrier (3) and is movable out of its operative position when a load (20) is to be handled.
    Type: Grant
    Filed: September 16, 1988
    Date of Patent: January 16, 1990
    Assignee: Firma Jungheinrich Unternehmensverwaltung KG
    Inventors: Hans-Jurgen Hachmann, Siegfried Hoener