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Fuel driven fastening tool

A combustion force and tool technology, applied in the direction of striking tools, nailing tools, manufacturing tools, etc., can solve problems such as bridges that hinder ignition sparks

Inactive Publication Date: 2010-06-09
HILTI AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, oil added to the combustion gases as a lubricant can accumulate on the electrodes and form bridges that prevent the ignition spark from being generated

Method used

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  • Fuel driven fastening tool
  • Fuel driven fastening tool
  • Fuel driven fastening tool

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0015] according to figure 1 A hand-held combustion-powered setting tool 10 has a one-piece or multi-part housing, denoted as a whole by 11 , in which a drive device 12 drivable by means of an air-fuel mixture is arranged. Fasteners, such as nails, pins, etc., can be driven into the workpiece by means of the drive device 12 . These fasteners can be stored, for example, in magazines on the setting tool 10 .

[0016] Belonging to the driving device is mainly a combustion chamber 15 and a pilot cylinder 13, in which a piston 14 that can be displaced axially is provided. In the initial state shown, the combustion chamber 15 is delimited circumferentially by the combustion chamber sleeve 28 and axially at the first end of the mounting piston 14 and the annular combustion chamber wall 29 and at the combustion chamber rear wall 30 Defined at the second end portion of the combustion chamber rear wall 30 is configured as a cylinder head (cylinder head).

[0017] The fan 16, which is...

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PUM

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Abstract

A fuel-powered fastener driving device (10) for driving fastening elements, comprising a combustion chamber (15) for a fuel that can be metered using a metering means (21) and comprising an fuel-ignition means (26) arranged in the combustion chamber (15) is provided. Here, the ignition means has a resistance element that can be heated up by means of an ignition current in order to ignite an air-fuel mixture contained in the combustion chamber.

Description

technical field [0001] The invention relates to a combustion-powered setting tool of the type stated in the preamble of claim 1 . Background technique [0002] Such installations have a combustion chamber in which a proportion of liquefied gas or other vaporizable fuel can be combusted together with an oxidizing agent such as ambient air. By means of the combustion energy, a setting piston guided displaceably in a piston guide is driven in order to drive the fastener into the object. [0003] US 6 123 241 discloses a combustion-driven setting tool with electronic control means for controlling ignition and fuel injection. In this case, the setting tool has an ignition device, for example, which is designed as a conventional spark plug. [0004] The disadvantage of this solution is that, on the one hand, the electronics generating the high voltage are expensive and cumbersome to manufacture, and on the other hand, a strong electromagnetic radiation (EMV) is generated, which ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B25D9/10
CPCB25C1/08
Inventor N·赫布T·迪特里希
Owner HILTI AG