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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 10610938 B1

PDFFull Text
Date of Patent:
Apr. 07, 2020

Filed:

Nov. 21, 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 in rotation via a belt drive. The belt drive has at least one first, driving pulley and at least one second, driven pulley. Between the first pulley and the second pulley there acts at least one drive belt for transmitting the drive torque. A second pulley is connected to the tool for conjoint rotation. The rotational speed of the second pulley is less than the rotational speed of the first pulley during operation. The work apparatus has a brake unit which acts on the first pulley. The belt drive includes at least one redirection roll. During braking, at least one redirection roll bears on the tight side of each drive belt which acts between the first pulley and the second pulley. This allows a simple structure and safe braking of the work tool.

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