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:
Sep. 21, 2021
Filed:
Apr. 13, 2018
Andreas Stihl Ag & Co. KG, Waiblingen, DE;
Kay-Steffen Gurr, Heilbronn, DE;
Martin Schurr, Mutlangen, DE;
Andreas Mack, Schwaikheim, DE;
Christian Heigemeyr, Egweil, DE;
Andreas Stihl AG & Co. KG, Waiblingen, DE;
Abstract
A method for operating an electric gardening and/or forestry apparatus system having an accumulator, a gardening and/or forestry apparatus with an electric motor, and a protective electronic circuit including inputs which are connected to the accumulator, outputs which are connected to the gardening and/or forestry apparatus, and a switching element which is disposed in a power path between one of the inputs and one of the outputs. The method turns on the switching element to a first conductive condition, measures an electric current through the power path, turns off the switching element to a second conductive condition, if the measured electric current exceeds a predetermined current limit value, measures an electric output voltage between the outputs, and either again turns on the switching element to the first conductive condition, if the measured electric output voltage reaches and/or exceeds a predetermined voltage limit value, or outputs an error signal, if the measured electric output voltage is below the predetermined voltage limit value.