logo

For the Inventor, By the Inventor

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.:

US 10675694 B1

PDFFull Text
Date of Patent:
Jun. 09, 2020

Filed:

Nov. 25, 2016

Handheld work apparatus

Applicant:

Andreas Stihl Ag & Co. KG, Waiblingen, DE;

Inventors:

Sebastian Hanussek, Remseck, DE;

Jan Rieger, Oppenweiler, DE;

Assignee:

Andreas Stihl AG & Co. KG, Waiblingen, DE;

Attorney:

Walter Ottesen, P.A.

Primary Examiner:

Jason Daniel Prone

Assistant Examiner:

Richard D Crosby, Jr

Int. Cl.
CPC ...
B23D 47/12 (2006.01); B27B 5/38 (2006.01); B27B 9/00 (2006.01); F16H 7/02 (2006.01); F16H 7/12 (2006.01); F16H 55/36 (2006.01); B23D 45/16 (2006.01); F16H 7/08 (2006.01);
U.S. Cl.
CPC ...
B23D 47/12 (2013.01); B23D 45/16 (2013.01); B27B 5/38 (2013.01); B27B 9/00 (2013.01); F16H 7/02 (2013.01); F16H 7/1281 (2013.01); F16H 55/36 (2013.01); F16H 2007/0806 (2013.01); F16H 2007/0865 (2013.01); F16H 2007/0893 (2013.01);
Abstract

A handheld work apparatus has a drive motor which drives a work tool rotationally via a belt drive. The belt drive has a first, driving pulley and a second, driven pulley. The second pulley is connected fixedly to the work tool so as to rotate therewith. The rotational speed of the second pulley is lower during operation than that of the first pulley. A brake unit acts on the belt drive. A first drive belt of a first stage and a second drive belt of a second stage act between the pulleys to transfer the drive torque. The belts each bring about a rotational speed reduction. The belt drive includes a redirection roll which bears against the belt, via which the highest drive torque is transmitted during operation. As a result, a braking operation of the work tool is enabled independently of the rotational speed of the tool.

Find Patent Forward Citations

Loading…