Patents by Inventor Helmut Achtzehnter

Helmut Achtzehnter 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: 5926960
    Abstract: A hedge shears has a housing with two handles provided each with an actuating button for turning on and off the hedge shear during two-hand operation. The handle for holding the hedge shears and the handle for guiding the hedge shear are formed so that the handle for holding is T-shaped and has a longitudinal member and a transverse member to form three gripping legs, wherein two gripping legs are bent downwardly.
    Type: Grant
    Filed: May 13, 1996
    Date of Patent: July 27, 1999
    Assignee: Robert Bosch GmbH
    Inventors: Peter Heywood, Helmut Achtzehnter, Klaus Schoen
  • Patent number: 5689887
    Abstract: A motor-driven hedge shear has a housing, a pair of hedge shear cutters extending in a longitudinal direction outwardly of the housing, means for reciprocatingly driving the hedge shear cutters in opposite directions and including a motor shaft, a coulisse transmission provided between the means and the hedge shear cutters, cutter holders provided for supporting the hedge shear cutters and having coulisse ears, the coulisse transmission including toothed gears provided with crank pins engaging in the coulisse ears, a central shaft supporting the toothed gears and having ends rotatably supported in the housing. Two of the toothed gears of the coulisse transmission are arranged on the central shaft so as to be axially spaced from one another, and have facing sides provided with crank pins formed as eccentrically arranged circular discs.
    Type: Grant
    Filed: June 3, 1996
    Date of Patent: November 25, 1997
    Assignee: Robert Bosch GmbH
    Inventors: Peter Heywood, Helmut Achtzehnter, Theodor M. J. Brouwers