Invention Grant
- Patent Title: Handheld work apparatus having a drive motor for driving a work tool and method for operating said apparatus
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Application No.: US14138974Application Date: 2013-12-23
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Publication No.: US09636792B2Publication Date: 2017-05-02
- Inventor: Markus Mandalka , Georg Heinzelmann , Klaus Kaupp
- 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: DE102012025309 20121222
- Main IPC: B25B21/02
- IPC: B25B21/02 ; E21B7/00 ; B23Q11/00 ; B25F5/02 ; B27B17/00 ; B25F5/00

Abstract:
A handheld work apparatus has a drive motor for driving a tool, an operating element for operating the drive motor, a first inhibiting unit and a second inhibiting unit. Each inhibiting unit has a disable state and an enable state. The operating element is inhibited for operating the drive motor when at least one of the inhibiting units is in its disable state. The work apparatus further has a locking device which locks the first inhibiting unit in its enable state if the second inhibiting unit is in its enable state. A method for operating the work apparatus provides that the first inhibiting unit is locked in its enable state when the first inhibiting unit and the second inhibiting unit are situated in their enable states at the same time.
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