Hand-held, motor-driven tool, especially petrol chainsaw

The integration of a gearwheel and starter motor in hand-held power tools allows for effortless engine start-up, addressing user fatigue and safety issues by replacing manual cable starters with a switch-activated electric motor, suitable for retrofitting existing tools.

DE102024105357B3Active Publication Date: 2025-07-31VÖLKL WALTER
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Patent Information

Application Number
DE102024105357
Authority / Receiving Office
DE · DE
Patent Type
Patents
Current Assignee / Owner
Filing Date
2024-02-26
Publication Date
2025-07-31
Estimated Expiration
2044-02-26

AI Technical Summary

Technical Problem

Hand-held power tools with internal combustion engines require manual effort to start, leading to user fatigue and safety concerns due to the need for physical exertion, especially when starting repeatedly.

Method used

A starting device for hand-held power tools, such as petrol engine saws, that replaces the manual cable starter with a combination of a gearwheel and starter motor, allowing engine start-up via a switch-activated electric motor, which drives the gearwheel to crank the engine crankshaft.

Benefits of technology

Enables effortless engine starting without physical exertion, reducing user fatigue and improving safety by eliminating the need for manual force, while being compatible with existing tools through retrofitting.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention relates to a hand-held tool, in particular a petrol chain saw, with an internal combustion engine and a starting device (10), which is characterized in that the starting device (10) comprises a gear (12) and a starter motor (14) interacting with the gear (12), wherein a flywheel (1) arranged on a crankshaft of the internal combustion engine can be driven by the starter motor (14) via the gear (12) in order to start the internal combustion engine. The invention further relates to a starting device (10) for a hand-held tool, in particular a petrol chain saw, with an internal combustion engine, which is characterized by an adapter (11) for positively connecting or fastening to a flywheel (1) of the tool, a gear (12) that can be arranged on or at the adapter (11), and a starter motor (14) for driving the gear (12).
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Citation Information

Patent Citations

  • Starting device for an internal combustion engine

    DE3831710A1

  • Internal combustion engine with electric starting system

    EP4116570A1

  • Engine starter

    US20060027201A1

  • Starting system for an engine

    WO2013015779A2