Patents by Inventor Heinrich Laeuppi

Heinrich Laeuppi 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: 4799820
    Abstract: Apparatus for inserting longitudinal studs in a concrete road covering. By means of a longitudinally running sled and forks, an exact parallel orientation of the longitudinal studs is achieved, as well as their arrangement at a predetermined height. Through the automatic loading of a holder for the longitudinal studs and the synchronization of the device with the motion of the device for inserting cross-studs, a minimum distance between the longitudinal ends and the cross-joints is maintained.
    Type: Grant
    Filed: April 3, 1987
    Date of Patent: January 24, 1989
    Assignee: Erhard Thoma
    Inventors: Heinrich Laeuppi, Bruno Fedrizzi
  • Patent number: 4798495
    Abstract: The apparatus (20) is vertically and adjustably placed on the girders (2b) of the sheet piling equipment (1). It has a slab (21) with apertures (26) parallel to the direction of movement. A vibrating beam (60) is vertically and adjustably placed on the slab (21) between two supports (51, 52). Fasteners (28) are arranged on the apertures (26) for the reinforcement rods (22). The (60) beam is lowered by means of prongs (62). The prongs (62) surround the reinforcement rods (22) and ease them into the road surface (6). After lifting the beam (60) with the prongs (62), the slab (21) is moved back and forth horizontally to the apertures (26), then lifted and pulled back up to the equipment (1). Thus, any irregularities caused by installation of reinforcement rods (22) can be eliminated.
    Type: Grant
    Filed: March 26, 1987
    Date of Patent: January 17, 1989
    Assignee: Erhard Thoma
    Inventors: Heinrich Laeuppi, Paul Rapp