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:
Sep. 17, 2019
Filed:
Nov. 17, 2015
Hilti Aktiengesellschaft, Schaan, LI;
Roland Schaer, Grabs, CH;
Antonios Draganis, Bad Woerishofen, DE;
Peter Hricko, Buchs, CH;
Franz Moessnang, Stadtbergen, DE;
Erwin Manschitz, Germering, DE;
Hilti Aktiengesellschaft, Schaan, LI;
Abstract
The control method for a hammer drill () provides the following steps. During basic operation, the motor () rotates at an operating speed for the drilling operation with chiseling action in order to rotationally drive the tool holder () and to drive the hammer mechanism () with a nominal striking power. The torque coupling () is monitored with the aid of a sensor (). If a disengagement of the torque coupling () occurs, the striking power of the hammer mechanism () is reduced to below 10% of the nominal striking power during a disengagement of the torque coupling (), and the torque coupling () is driven. When the disengagement of the torque coupling () ends, the striking power of the hammer mechanism () is increased to the nominal striking power and the torque coupling () is driven at the operating speed for the drilling operation with chiseling action.