Invention Grant
- Patent Title: Handheld work apparatus
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Application No.: US15361291Application Date: 2016-11-25
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Publication No.: US10675694B2Publication Date: 2020-06-09
- Inventor: Sebastian Hanussek , Jan Rieger
- Applicant: Andreas Stihl AG & Co. KG
- Applicant Address: DE Waiblingen
- Assignee: Andreas Stihl AG & Co. KG
- Current Assignee: Andreas Stihl AG & Co. KG
- Current Assignee Address: DE Waiblingen
- Agency: Walter Ottesen, P.A.
- Priority: com.zzzhc.datahub.patent.etl.us.BibliographicData$PriorityClaim@114f8945
- Main IPC: B23D47/12
- IPC: B23D47/12 ; B27B5/38 ; B27B9/00 ; F16H7/02 ; F16H7/12 ; F16H55/36 ; B23D45/16 ; F16H7/08

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.
Public/Granted literature
- US20170072482A1 HANDHELD WORK APPARATUS Public/Granted day:2017-03-16
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