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

A technology of portable tools and safety devices, applied in the field of chainsaws with heat engines

Inactive Publication Date: 2011-07-27
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

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 (lumber saws, hedge shears) with a heat engine, brush cutters (brush cutters) with a heat engine or woodworking drills (augers) with a heat engine, etc.

[0041] The invention is applicable to portable tools driven by a heat engine, i...

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PUM

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Abstract

The present invention relates to a safety device for portable tool with a heat engine that is capable of stopping, almost instantly, the operation of said tool after unexpected, sudden, and violent movements, said device including at least one electronic accelerometer (5) enabling the measurement of the acceleration along at least one plane or axis (X, Y, Z), the output(s) of said accelerometer (5) being connected to an electric and/or electronic monitoring means (7), wherein said electric and/or electronic monitoring means consists of an electric and/or electronic management card (7), the latter and the accelerometer being supplied with electric voltage by an electric current generator (9) known per se and actuated by the heat engine, said electric and/or electronic management card being configured to process analog or digital electrical data from the accelerometer and activate a means ensuring that said heat engine stops almost instantly.

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 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 during a sharp acceleration ...

Claims

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Application Information

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IPC IPC(8): B27B17/08
CPCB27B17/083F16P3/00B25F5/00B27G19/003B27B17/08B27B17/00B27G19/06
Inventor R·佩朗
Owner PELLENC SA
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