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:
Aug. 25, 2020
Filed:
Jun. 25, 2015
Hilti Aktiengesellschaft, Schaan, LI;
Erwin Manschitz, Germering, DE;
Walter Wissmach, Munich, DE;
Hilti Akitengesellschaft, Schaan, LI;
Abstract
A handheld power tool has a tool socket () to hold a tool () along a working axis (), a motor () and a slip clutch () having a number of blocking elements. A sensor () serves to record a measured signal () as the measure of vibrations inside the handheld power tool (). A band-pass filter () has a pass range in which a frequency lies that is equal to the product of the rotational speed of the wheel () on the drive side and the number N of blocking elements (). The measured signal () filtered by the band-pass filter () is fed to an evaluation unit (). When the filtered measured signal () exceeds a limit value, the evaluation unit () reduces the rotational speed of the motor ().