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. 01, 2008
Filed:
Feb. 09, 2006
Norbert Hahn, Hünstetten-Limbach, DE;
Ernst Staas, Limburg, DE;
Achim Buchholz, Limburg, DE;
Michael Stirm, Oberursel, DE;
Ralf Bernhart, Idstein, DE;
Norbert Hahn, Hünstetten-Limbach, DE;
Ernst Staas, Limburg, DE;
Achim Buchholz, Limburg, DE;
Michael Stirm, Oberursel, DE;
Ralf Bernhart, Idstein, DE;
Black & Decker Inc., Newark, DE (US);
Abstract
A reciprocating drive mechanism for a striker in a hammer, a rotary hammer, or a power drill having a hammer action, includes a sinusoidal cam channel formed on a drive member and a cam follower, in the form of a ball bearing, attached to a driven member which, due to the interaction of the cam and cam follower, results in a reciprocating movement of the driven member. Both the drive member and driven member can be rotatingly driven by a motor, their relative speeds resulting in the reciprocating movement of the driven member. The driven member is connected to the striker either via a mechanical helical spring or an air spring.