EP1314517B1 - Befestigungsgerät mit druckluftgetriebenem Kolben - Google Patents

Befestigungsgerät mit druckluftgetriebenem Kolben Download PDF

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Publication number
EP1314517B1
EP1314517B1 EP02292868A EP02292868A EP1314517B1 EP 1314517 B1 EP1314517 B1 EP 1314517B1 EP 02292868 A EP02292868 A EP 02292868A EP 02292868 A EP02292868 A EP 02292868A EP 1314517 B1 EP1314517 B1 EP 1314517B1
Authority
EP
European Patent Office
Prior art keywords
duct
chamber
gas
piston
section
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP02292868A
Other languages
English (en)
French (fr)
Other versions
EP1314517A1 (de
Inventor
Bruno Toulouse
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Societe de Prospection et dInventions Techniques SPIT SAS
Original Assignee
Societe de Prospection et dInventions Techniques SPIT SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Societe de Prospection et dInventions Techniques SPIT SAS filed Critical Societe de Prospection et dInventions Techniques SPIT SAS
Publication of EP1314517A1 publication Critical patent/EP1314517A1/de
Application granted granted Critical
Publication of EP1314517B1 publication Critical patent/EP1314517B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25C—HAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS
    • B25C1/00—Hand-held nailing tools; Nail feeding devices
    • B25C1/08—Hand-held nailing tools; Nail feeding devices operated by combustion pressure

Definitions

  • the invention relates to a buffer attachment apparatus with a piston engine propelled by gas, in particular combustion gases.
  • gas in particular combustion gases.
  • it relates to a means of improving the combustion inside the chamber in which the gases are produced.
  • An apparatus of this type includes an envelope that has the general shape of a pistol.
  • This envelope contains a small internal combustion engine that drives a buffer guide in a translational motion.
  • the buffer guide is integral with a piston propelled by a compressed gas which is the product of the combustion of a combustible gas in the adjacent combustion chamber.
  • the gaseous mixture comprising the air and the combustible gas is created in the chamber and then ignited by a suitable ignition means.
  • the gun comprises a fuel gas cartridge housed for example in the handle.
  • When firing the buffer a metered quantity of fuel gas is sent into the chamber, and the firing means is then energized.
  • the gas follows a path along the apparatus from a metering valve, close to the gas cartridge, into the combustion chamber.
  • the gas is guided in a conduit, usually a thin tube, disposed between the valve and the chamber.
  • this result is achieved by incorporating a means creating a pressure drop between the portion of the tube upstream of its end close to the combustion chamber and the chamber itself, so as to avoid, at least in part, the vaporization of the gas upstream of said end.
  • Such means consists of a narrowing of the tube at its end and the tube has at least one lateral orifice.
  • the gas is normally in the liquid state in the cartridge, and it undergoes a relaxation at the outlet of the metering valve.
  • the time of its vaporization is delayed before it is introduced into the chamber, the time taken by the apparatus to react to the pressure on the trigger rod is substantially reduced.
  • the section of the orifice or orifices is at least 10% less than the section of the conduit.
  • a fan 15 is mounted inside the chamber 5 and has the function of activating the gas mixture. It is driven by a motor 17 housed in the cylinder head 7. Its axis of rotation is here located in the extension of the rod 13. The gas mixture is ignited by a means which is not shown and which is located at the of the cylinder head, behind the fan.
  • a conduit or tube 19 for gas injection opens into the combustion chamber 5. Its axis is substantially parallel to that of the rod 13. It is connected at its other end, not visible in the figure, to the metering valve. This is arranged in a housing of the apparatus provided for this purpose
  • this end 19A of the injection tube shows a first axial orifice 191 which allows an injection in the extension of the duct 19 in the direction of the fan blades. It also comprises an orifice 192. This orifice is placed on the wall of the tube 19 for radial injection parallel to the plane of the piston 9. According to the invention, the total of the sections of the orifices is smaller than the section of the tube, so to create a pressure drop between the tube and the combustion chamber.
  • the tube is closed at its end by a transverse wall and has only openings made on the wall, laterally.
  • a tube according to the invention was made and the tube of an existing apparatus was replaced by the latter.
  • the narrowing of the duct section is therefore 15%.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Nozzles (AREA)
  • Compressor (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Preventing Unauthorised Actuation Of Valves (AREA)
  • Telephone Function (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)

Claims (4)

  1. Gerät zur Befestigung eines Dübels, jener Art mit druckgasgetriebenem Kolben (9), das eine Brennkammer (5) umfasst, die auf einer Seite durch den Kolben und auf der anderen Seite durch einen Zylinderkopf (7) begrenzt wird, mit einer Leitung (19) zum Einspritzen von Brenngas, die mit einem Ende (19A) in der Kammer mündet, dadurch gekennzeichnet, dass die Leitung (19), die an ihrem Ende eine axiale Öffnung (191) enthält, in der Nähe ihres Endes eine laterale Öffnung (192) mit einem verengten Querschnitt aufweist, die einen Druckabfall zwischen dem Teil der Leitung (19), der stromaufwärts des Endes (19A) liegt, und der Kammer (5) selbst erzeugt, um das Verdampfen des Brenngases in dem stromaufwärts des Endes liegenden Teil der Leitung zumindest teilweise zu vermeiden.
  2. Gerät nach Anspruch 1, wobei der Querschnitt der Öffnungen um mindestens 10% kleiner als der Querschnitt der Leitung ist.
  3. Gerät nach einem der Ansprüche 1 und 2, das ein Gebläse zum Mischen im Inneren der Brennkammer aufweist, wobei die Leitung (19) mindestens eine der Öffnungen (192) aufweist, die so ausgerichtet ist, dass sie mindestens einen Teil der in die Kammer eingespritzten Brenngase zum Gebläse (15) leitet.
  4. Gerät nach Anspruch 3, das eine zweite der Öffnungen (191) aufweist, die einen Teil der Brenngase in einer parallel zur Ebene des Kolbens (9) verlaufenden Richtung leitet.
EP02292868A 2001-11-21 2002-11-19 Befestigungsgerät mit druckluftgetriebenem Kolben Expired - Lifetime EP1314517B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0115052 2001-11-21
FR0115052A FR2832344B1 (fr) 2001-11-21 2001-11-21 Appareil de fixation a piston propulse par gaz comprime

Publications (2)

Publication Number Publication Date
EP1314517A1 EP1314517A1 (de) 2003-05-28
EP1314517B1 true EP1314517B1 (de) 2009-05-27

Family

ID=8869625

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02292868A Expired - Lifetime EP1314517B1 (de) 2001-11-21 2002-11-19 Befestigungsgerät mit druckluftgetriebenem Kolben

Country Status (10)

Country Link
US (1) US6783046B2 (de)
EP (1) EP1314517B1 (de)
AT (1) ATE432150T1 (de)
AU (1) AU2002302059B2 (de)
CA (1) CA2412261C (de)
DE (1) DE60232431D1 (de)
DK (1) DK1314517T3 (de)
ES (1) ES2327715T3 (de)
FR (1) FR2832344B1 (de)
NZ (1) NZ522704A (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6892524B1 (en) * 2003-11-03 2005-05-17 Illinois Tool Works Inc. Latching mechanism for combustion chamber plate of a fastener driving tool
US6966478B2 (en) * 2003-11-03 2005-11-22 Illinois Tool Works Inc Combustion apparatus having collapsible volume
DE102008000167A1 (de) * 2008-01-29 2009-07-30 Hilti Aktiengesellschaft Brennkraftbetriebenes Setzgerät

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IN157475B (de) * 1981-01-22 1986-04-05 Signode Corp
EP0424941B1 (de) * 1989-10-27 1994-01-05 Hitachi Koki Co., Ltd. Mit Verbrennungsgas betriebenes Eintreibwerkzeug für Befestigungsmittel
US5263439A (en) * 1992-11-13 1993-11-23 Illinois Tool Works Inc. Fuel system for combustion-powered, fastener-driving tool
US6123241A (en) * 1995-05-23 2000-09-26 Applied Tool Development Corporation Internal combustion powered tool
US5752643A (en) * 1995-05-23 1998-05-19 Applied Tool Development Corporation Internal combustion powered tool
US5680980A (en) * 1995-11-27 1997-10-28 Illinois Tool Works Inc. Fuel injection system for combustion-powered tool
DE19950345C2 (de) * 1999-10-19 2003-06-05 Hilti Ag Verfahren und Vorrichtung zum Antrieb eines Kolbens eines brennkraftbetriebenen Arbeitsgeräts, insbesondere eines Setzgeräts für Befestigungselemente
DE19950350C2 (de) * 1999-10-19 2002-06-20 Hilti Ag Dosierkopf, insbesondere für brennkraftbetriebene Setzgeräte

Also Published As

Publication number Publication date
DE60232431D1 (de) 2009-07-09
US6783046B2 (en) 2004-08-31
NZ522704A (en) 2003-08-29
ES2327715T3 (es) 2009-11-03
CA2412261A1 (en) 2003-05-21
US20030094148A1 (en) 2003-05-22
FR2832344B1 (fr) 2004-01-23
ATE432150T1 (de) 2009-06-15
FR2832344A1 (fr) 2003-05-23
CA2412261C (en) 2005-06-14
DK1314517T3 (da) 2009-09-07
EP1314517A1 (de) 2003-05-28
AU2002302059B2 (en) 2005-12-22

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