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:
Apr. 30, 2013
Filed:
Dec. 29, 2005
Martin Soika, Idstein, DE;
Klaus-dieter Arich, Huenstetten-Beuerbach, DE;
Uwe Nemetz, Hünfelden Nauheim, DE;
Martin Soika, Idstein, DE;
Klaus-Dieter Arich, Huenstetten-Beuerbach, DE;
Uwe Nemetz, Hünfelden Nauheim, DE;
Black & Decker Inc., Newark, DE (US);
Abstract
A hammer drill has a transmission housingis formed from two clamshell halves of durable plastics or cast metal material. The transmission housingis mounted on first and second damping springsandat its rearward end. The transmission housingis also mounted on parallel rails (not shown) disposed within the tool housingsuch that the transmission housingcan slide a small distance relative to the tool housing. The forward end of the transmission housinghas a generally part conical portion, which abuts a corresponding part conical portionformed on the tool housing. The interface defined by conical portionsanddefines a stop against which the transmission housingrests against the tool housingin the inoperative condition of the hammer drill. When the hammer drillis being used, a gap opens up between the conical surfacesandwhich helps to damp axial and lateral vibrations that would otherwise be transmitted from the tool bit (not shown) to the user. However, the gap is sufficiently small that the hammer drilland the transmission housingcan still be adequately controlled by the user, and the part conical shape of the interface also assists in aligning the transmission housingwith the tool housingin order to give a user greater control over the direction of the tool bit.