The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 17, 2006
Filed:
Jul. 25, 2003
Karl Frauhammer, Leinfelden-Echterdingen, DE;
Gerhard Meixner, Filderstadt, DE;
Heinz Schnerring, Dettenhausen, DE;
Willy Braun, Neustetten, DE;
Axel Kuhnle, Freiberg A. N., DE;
Karl Frauhammer, Leinfelden-Echterdingen, DE;
Gerhard Meixner, Filderstadt, DE;
Heinz Schnerring, Dettenhausen, DE;
Willy Braun, Neustetten, DE;
Axel Kuhnle, Freiberg A. N., DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
The present invention relates to a drilling hammer comprising a hammer tube () that is rotationally drivable inside a housing (), a striking tool () located in the hammer tube () and provided with a piston () that can driven with a reciprocating motion, and an operating mode change-over switch () for the 'impact drilling' and 'chiseling' operating modes. The hammer tube () is decoupled from its rotary drive when in the “impact drilling” operating mode and is secured in the housing () in a non-rotative manner when in the “chiseling” operating mode. To obtain a switching mechanism () of the operating mode change-over switch () having a very flat design and requiring little installation space, an actuator ring () is fixed on the hammer tube () in an axially displaceable and torsion-proof manner, the actuator ring including at least one radially projecting locking spline () on its outer side facing away from the hammer tube (), the locking spline being capable of engaging in at least one axial recess () in the gearbox and in locking toothing () in the housing. Rotational motion of a control button () of the operating mode change-over switch () is converted to axial displacement of the actuator ring () on the hammer tube () by the switching mechanism (). In addition, the operating mode change-over switch () can be used to activate a “drilling” operating mode, in which the striking tool () is decoupled on the drive side.