Patents Represented by Attorney Ronald E. Creigg
  • Patent number: 8245791
    Abstract: The invention relates to a hand-held tool, in particular a rotary hammer, a percussion hammer, or a sabre saw. The hand-held tool is equipped with a drive unit and a stroke-generating element; the drive unit is embodied to move the stroke-generating element in a reciprocating fashion along a translation axis. The hand-held tool has at least one counterweight; the counterweight is operatively connected to the drive unit in such a way that it is possible to at least partially compensate for forces at least indirectly caused by the reciprocating motion. According to the invention, the counterweight in the hand-held tool is supported so that it is able to move, in particular to reciprocate, coaxial or parallel to the translation axis.
    Type: Grant
    Filed: March 16, 2010
    Date of Patent: August 21, 2012
    Assignee: Robert Bosch GmbH
    Inventors: Joerg Kriedel, Richard Engel, Otto Baumann, Hardy Schmid, Holger Ruebsaamen, Mario Patzig