Safety device for portable tools with a heat engine, capable of stopping the operation thereof after sudden, violent movements

Technology of a portable tool, safety device, applied in the field of chainsaw with heat engine

Inactive Publication Date: 2014-06-25
PELLENC SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This safety system is not suitable for portable tools such as chainsaws that have heat engines

Method used

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  • Safety device for portable tools with a heat engine, capable of stopping the operation thereof after sudden, violent movements
  • Safety device for portable tools with a heat engine, capable of stopping the operation thereof after sudden, violent movements
  • Safety device for portable tools with a heat engine, capable of stopping the operation thereof after sudden, violent movements

Examples

Experimental program
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Embodiment Construction

[0039] An advantageous but by no means limiting embodiment of a portable tool with a heat engine according to the invention is described with reference to the drawings.

[0040] A very advantageous application of a portable tool with a heat engine is described below, which according to the embodiment shown is constituted by a chainsaw 1 , but it will be understood by a person skilled in the art that the invention can be applied to any dangerous portable tool with a heat engine, In particular, it is desirable to provide a safety device for portable tools with a thermal motor which immediately stops the operation of the portable tool in the event of a sudden and violent movement or kickback, such as a chain saw with a thermal motor , pruning shears with a thermal engine (lumber saws, hedge shears), brush cutters with a thermal engine (brush cutters) or woodworking drills with a thermal engine (augers), etc.

[0041] The invention is applicable to portable tools driven by heat en...

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PUM

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Abstract

The device has a three-axis electronic accelerometer (5) measuring an acceleration along three axes (X-Z), and including an output connected to an electronic and / or electrical control unit constituted of an electronic and / or electrical brake control card (7). The control unit and the accelerometer are supplied with electrical voltage by a self electric current generator i.e. magnetic hand wheel (9). The control card processes analog or digital electrical information issued from the accelerometer and activates a unit assuring quasi instantaneous stop of a thermal motor.

Description

technical field [0001] The invention relates to a device for a portable tool with a heat engine (internal combustion engine, motor) which, during use of the portable tool, ensures that after a sudden (accidental) and violent movement of the tool (with sudden and violent The occurrence of movement) makes the operation of the tool automatically stop instantly (immediately, immediately) in order to ensure the safety of the user. The device is particularly suitable for chainsaws with heat engines. Background technique [0002] Official regulations require chainsaws to be equipped with safety devices in order to ensure that the tool is stopped in the event of a strong kickback or what is technically known as "kickback", which corresponds to 2 Expressed acceleration (at 700 to 2000m / s 2 between, depending on the type of tool). [0003] Currently, in chainsaw applications, such devices most often consist of a mechanical mechanism that covers the front handle and is activated dur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B27B17/08
CPCB27B17/083B25F5/00F16P3/00B27G19/003B27B17/00B27B17/08B27G19/06
Inventor R·佩朗
Owner PELLENC SA
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