EP0054782B1 - Buffer system in impact tools - Google Patents

Buffer system in impact tools Download PDF

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Publication number
EP0054782B1
EP0054782B1 EP81110132A EP81110132A EP0054782B1 EP 0054782 B1 EP0054782 B1 EP 0054782B1 EP 81110132 A EP81110132 A EP 81110132A EP 81110132 A EP81110132 A EP 81110132A EP 0054782 B1 EP0054782 B1 EP 0054782B1
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EP
European Patent Office
Prior art keywords
cushioning
cushioning element
cylinder
buffer
buffer element
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
Application number
EP81110132A
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German (de)
French (fr)
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EP0054782A3 (en
EP0054782A2 (en
Inventor
Gerhard Farian
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.)
Karl M Reich Maschinenfabrik GmbH
Original Assignee
Karl M Reich Maschinenfabrik GmbH
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Publication date
Application filed by Karl M Reich Maschinenfabrik GmbH filed Critical Karl M Reich Maschinenfabrik GmbH
Priority to AT81110132T priority Critical patent/ATE15777T1/en
Publication of EP0054782A2 publication Critical patent/EP0054782A2/en
Publication of EP0054782A3 publication Critical patent/EP0054782A3/en
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Publication of EP0054782B1 publication Critical patent/EP0054782B1/en
Expired 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
    • B25C1/04—Hand-held nailing tools; Nail feeding devices operated by fluid pressure, e.g. by air pressure
    • B25C1/047—Mechanical details

Definitions

  • the invention relates to a buffer system according to the preamble of claim 1.
  • an impact device for driving in nails or the like is known, the buffer system of which consists of a relatively soft buffer element made of volume-compressible material and a hard buffer element interacting therewith, the contact surface of which rests fully on the bottom of the cylinder base.
  • This buffer system is capable of absorbing surges with excess pressure and empty strokes safely and with a long service life. Due to the contact between the hard buffer element and the bottom of the cylinder base, however, an unpleasant structure-borne noise is generated with each stroke, and this disturbs the operator. In extreme cases, the hard buffer element is considerably deformed, which can then be damaged by internal friction and heating.
  • the object of the present invention is therefore to create a buffer system of the type mentioned at the outset which reliably absorbs and eliminates the excess of impact with the lowest possible structure-borne noise and with the longest possible service life.
  • the movable arrangement of the hard buffer element means the interposition of a friction stage between the soft spring characteristic of the soft buffer element and the hard spring characteristic of the hard buffer element.
  • the hard buffer element is arranged in the cylinder with a prestress, so that when the soft buffer element is pressed together, it is pressed even more strongly against the outer ring. Upon further compression, the excess impact energy is then destroyed by friction on the contact surfaces between the hard buffer element and the cylinder base or inner wall of the cylinder, and the heat generated can be dissipated well.
  • the hard buffer element lies with its entire contact surface on the bottom of the cylinder base, then it acts as in the known design as a hard, deformable buffer which is heated up considerably by internal friction. This internal heating can also destroy the hard buffer element, but at the same time there is an increase in structure-borne noise, which shows the operator that the buffer element must be replaced. This reliably prevents damage or destruction of parts of the wrapping device.
  • the design of the buffer system according to the invention offers the further advantage that this compressed air is only slowly and therefore quieter from the cylinder during the return stroke of the percussion piston escapes because the soft buffer element rests on the hard buffer element and thus severely limits the cross section of the vent opening.
  • a cylinder 2 is arranged in a housing 1, in which a percussion piston 3 with a percussion plunger 4 is slidably mounted.
  • a handle 5 compressed air is supplied to the impact device from a compressed air source, not shown, and after actuation of trigger 6 by actuation of a tubular valve slide 7 enters the interior of cylinder 2, where the compressed air strikes the piston 3 held by an elastic locking device 8 in the direction of the cylinder base 9 accelerates.
  • the nail 10 is driven into a workpiece, not shown, in a known manner by means of a ram 4. Additional nails 10 are provided in a magazine 11.
  • the cylinder 2 is surrounded by an air reservoir 12, into which compressed air passes through openings 13 and 14 in cylinder 2 in a known manner during the stroke stroke. After releasing trigger 6, this compressed air acts on the underside of percussion piston 3 and conveys it back to its starting position.
  • the impact piston 3 strikes a buffer system 15, which is shown enlarged in FIG. 2. It consists of a first, hard-elastic buffer element 16, which expediently consists of cross-linked polyurethane. Its contact surface 18 directed against the conical base 17 of the cylinder base 9 is also frustoconical, but its cone angle is smaller than the cone angle of the base. When the buffer system is in a relaxed position, there is therefore a space 19 between the base 17 and the contact surface 18, while the buffer element 16 rests on the base 20.
  • the buffer element 16 also has a cylindrical section 21, the outside diameter of which is larger than the inside diameter of cylinder 2, so that the buffer element 16 is arranged in cylinder 2 with a prestress.
  • a second buffer is seated on the first buffer element 16 against the percussion piston 3 element 22, which preferably consists of cellular polyurethane elastomer. Due to the cellular structure, a progressive spring characteristic is achieved in a known manner, its end face 23 directed against the percussion piston 3 is beveled outwards.
  • the percussion piston 3 has a cylindrical recess 24, the inside diameter of which is somewhat larger than the outside diameter of the buffer element 22.
  • left half shows the buffer system 15 in a relaxed state, the percussion piston 3 just touching the second buffer element 22. There is a space 19 between the bottom 17 and the contact surface 18.
  • the buffer system 15 is now compressed, as shown in FIG. 2, right half.
  • the first buffer element 16 is spread by the compressed second buffer element 22 such that its cylindrical section 21 presses against cylinder 2 beyond the pretension.
  • the cylindrical section 21 moves against the cylinder 2 and parts of the contact surface 18 against the substrate 20 with considerable friction, energy being dissipated to form heat. This heat can be easily dissipated via the surrounding metal parts.
  • the first buffer element 16 acts as a hard buffer, which has been known since then and which can absorb further excess impact energy under internal deformation.

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Earth Drilling (AREA)
  • Vibration Dampers (AREA)

Abstract

The present buffer system for a fastener driving device includes two cooperating buffer elements (16, 22) located at the bottom (17) of the driving cylinder (2). A first buffer element (16) of hard elastic material rests on the inwardly facing surface of the cylinder bottom (17) in such a manner that at least a portion of the surface (18) of the first buffer element (16) contacting the bottom (17) is movable relative to the bottom (17) of the driving cylinder (2). A second buffer element (22) made of an elastic material softer than the hard elastic material of the first buffer element, rests on the first buffer element.

Description

Die Erfindung bezieht sich auf ein Puffersystem gemäss Oberbegriff von Anspruch 1.The invention relates to a buffer system according to the preamble of claim 1.

Aus der DE-PS 2 339163 ist dazu ein Einschlaggerät zum Einschlagen von Nägeln oder dgl. bekannt, dessen Puffersystem aus einem verhältnismässig weichen Pufferelement aus volumenkompressiblem Werkstoff und einem damit zusammenwirkenden harten Pufferelement besteht, das mit seiner Kontaktfläche voll auf dem Boden des Zylinderfusses aufliegt.From DE-PS 2 339163 an impact device for driving in nails or the like is known, the buffer system of which consists of a relatively soft buffer element made of volume-compressible material and a hard buffer element interacting therewith, the contact surface of which rests fully on the bottom of the cylinder base.

Dieses Puffersystem ist in der Lage, Schläge mit Drucküberschuss und Leerschläge sicher und bei hoher Lebensdauer aufzufangen. Durch den Kontakt zwischen hartem Pufferelement und Boden des Zylinderfusses entsteht jedoch bei jedem Schlag ein unangenehmer und den Bedienungsmann störender Körperschall. In extremen Fällen tritt auch eine erhebliche Verformung des harten Pufferelements ein, das dann durch innere Reibung und Erwärmung beschädigt werden kann.This buffer system is capable of absorbing surges with excess pressure and empty strokes safely and with a long service life. Due to the contact between the hard buffer element and the bottom of the cylinder base, however, an unpleasant structure-borne noise is generated with each stroke, and this disturbs the operator. In extreme cases, the hard buffer element is considerably deformed, which can then be damaged by internal friction and heating.

Aufgabe der vorliegenden Erfindung ist daher die Schaffung eines Puffersystems der eingangs genannten Art, das den Schlagüberschuss bei möglichst geringem Körperschall und bei möglichst hoher Lebensdauer sicher auffängt und vernichtet.The object of the present invention is therefore to create a buffer system of the type mentioned at the outset which reliably absorbs and eliminates the excess of impact with the lowest possible structure-borne noise and with the longest possible service life.

Diese Aufgabe wird erfindungsgemäss durch die im kennzeichnenden Teil des Anspruchs 1. angegebenen Merkmale gelöst.This object is achieved according to the invention by the features specified in the characterizing part of claim 1.

Die bewegbare Anordnung des harten Pufferelements bedeutet die Zwischenschaltung einer Reibungsstufe zwischen der weichen Federkennlinie des weichen Pufferelements und der harten Federkennlinie des harten Pufferelements. Beim normalen Nageln mit wenig Drucküberschuss wird nur der weiche Teil der Federkennlinie ausgenützt, erst bei Leerschlägen kommt der harte Teil zum Tragen. Dies führt zu einer deutlichen Reduzierung des Körperschalls beim normalen Nageln, dessen Verminderung bis zu 6 dB, also nahezu eine Halbierung betragen kann.The movable arrangement of the hard buffer element means the interposition of a friction stage between the soft spring characteristic of the soft buffer element and the hard spring characteristic of the hard buffer element. With normal nailing with little excess pressure, only the soft part of the spring characteristic is used; the hard part only comes into play when there are no blows. This leads to a significant reduction in structure-borne noise during normal nailing, the reduction of which can be up to 6 dB, i.e. almost a halving.

Bei einer vorteilhaften Ausführungsform ist das harte Pufferelement mit Vorspannung im Zylinder angeordnet, so dass es beim Zusammendrücken vom weichen Pufferelement noch stärker an den Aussenring angedrückt wird. Beim weiteren Zusammendrücken wird dann die überschüssige Schlagenergie durch Reibung an den Kontaktflächen zwischen hartem Pufferelement und Zylinderfuss bzw. Innenwand des Zylinders vernichtet, wobei die dabei entstehende Wärme gut abgeführt werden kann.In an advantageous embodiment, the hard buffer element is arranged in the cylinder with a prestress, so that when the soft buffer element is pressed together, it is pressed even more strongly against the outer ring. Upon further compression, the excess impact energy is then destroyed by friction on the contact surfaces between the hard buffer element and the cylinder base or inner wall of the cylinder, and the heat generated can be dissipated well.

Liegt das harte Pufferelement mit seiner ganzen Kontaktfläche auf dem Boden des Zylinderfusses auf, dann wirkt es wie bei der bekannten Ausführung als harter, verformbarer Puffer, der durch innere Reibung stark erwärmt wird. Diese innere Erwärmung kann zwar auch zur Zerstörung des harten Pufferelements führen, gleichzeitig tritt jedoch eine Erhöhung des Körperschalles auf, der dem Bedienungsmann zeigt, dass ein Auswechseln des Pufferelements nötig ist. Damit wird eine Beschädigung oder Zerstörung von Teilen des Einschlaggerätes sicher vermieden.If the hard buffer element lies with its entire contact surface on the bottom of the cylinder base, then it acts as in the known design as a hard, deformable buffer which is heated up considerably by internal friction. This internal heating can also destroy the hard buffer element, but at the same time there is an increase in structure-borne noise, which shows the operator that the buffer element must be replaced. This reliably prevents damage or destruction of parts of the wrapping device.

Wird das Einschlaggerät in bekannter Weise mit einem Luftspeicher versehen, der zur Speicherung der für den Rückhub des Schlagkolbens nötigen Druckluft dient, dann bietet die erfindungsgemässe Ausführung des Puffersystems den weiteren Vorteil, dass diese Druckluft beim Rückhub des Schlagkolbens nur langsam und damit leiser aus dem Zylinder entweicht, weil das weiche Pufferelement auf dem harten Pufferelement aufliegt und damit den Querschnitt der Entlüftungsöffnung stark beschränkt.If the impact device is provided in a known manner with an air accumulator which is used to store the compressed air required for the return stroke of the percussion piston, then the design of the buffer system according to the invention offers the further advantage that this compressed air is only slowly and therefore quieter from the cylinder during the return stroke of the percussion piston escapes because the soft buffer element rests on the hard buffer element and thus severely limits the cross section of the vent opening.

Im folgenden ist ein Ausführungsbeispiel der Erfindung unter Bezugnahme auf die Zeichnungen näher beschrieben.
Es zeigen:

  • Fig. 1 Längsschnitt durch ein Einschlaggerät mit Puffersystem.
  • Fig. 2 Längsschnitt durch das Puffersystem, linke Hälfte entspannt, rechte Hälfte zusammengedrückt.
An exemplary embodiment of the invention is described in more detail below with reference to the drawings.
Show it:
  • Fig. 1 longitudinal section through a wrapping device with buffer system.
  • Fig. 2 longitudinal section through the buffer system, left half relaxed, right half compressed.

Bei dem in Fig. 1 teilweise dargestellten Einschlaggerät für Nägel oder dgl. ist in einem Gehäuse 1 ein Zylinder 2 angeordnet, in dem ein Schlagkolben 3 mit einem Schlagstössel 4 verschiebbar gelagert ist. Durch einen Händgriff 5 wird dem Einschlaggerät Druckluft von einer nicht dargestellten Druckluftquelle zugeführt und gelangt nach Betätigung von Abzugshebel 6 durch Betätigung eines rohrförmigen-Ventilschiebers 7 in den Innenraum von Zylinder 2, wo die Druckluft den durch eine elastische Rastvorrichtung 8 festgehaltenen Schlagkolben 3 in Richtung Zylinderfuss 9 beschleunigt. Dabei wird in bekannter Weise durch Schlagstössel 4 der Nagel 10 in ein nicht dargestelltes Werkstück eingeschlagen. Weitere Nägel 10 sind in einem Magazin 11 bereitgestellt.1, a cylinder 2 is arranged in a housing 1, in which a percussion piston 3 with a percussion plunger 4 is slidably mounted. By a handle 5 compressed air is supplied to the impact device from a compressed air source, not shown, and after actuation of trigger 6 by actuation of a tubular valve slide 7 enters the interior of cylinder 2, where the compressed air strikes the piston 3 held by an elastic locking device 8 in the direction of the cylinder base 9 accelerates. In this case, the nail 10 is driven into a workpiece, not shown, in a known manner by means of a ram 4. Additional nails 10 are provided in a magazine 11.

Der Zylinder 2 ist von einem Luftspeicher 12 umgeben, in den beim Schlaghub in bekannter Weise Druckluft durch Öffnungen 13 und 14 in Zylinder 2 gelangt. Diese Druckluft wirkt nach Loslassen von Abzugshebel 6 auf die Unterseite von Schlagkolben 3 und befördert diesen wieder in seine Ausgangsstellung.The cylinder 2 is surrounded by an air reservoir 12, into which compressed air passes through openings 13 and 14 in cylinder 2 in a known manner during the stroke stroke. After releasing trigger 6, this compressed air acts on the underside of percussion piston 3 and conveys it back to its starting position.

Am unteren Ende eines Schlaghubes trifft der Schlagkolben 3 auf ein Puffersystem 15, das in Fig. 2 vergrössert dargestellt ist. Es besteht aus einem ersten, hartelastischen Pufferelement 16, das zweckmässigerweise aus vernetztem Polyurethan besteht. Seine gegen den konischen Boden 17 von Zylinderfuss 9 gerichtete Kontaktfläche 18 ist ebenfalls kegelstumpfartig ausgebildet, sein Kegelwinkel ist jedoch kleiner als der Kegelwinkel des Bodens. Bei entspannter Stellung des Puffersystems besteht daher zwischen Boden 17 und Kontaktfläche 18 ein Zwischenraum 19, während Pufferelement 16 am Bodengrund 20 anliegt.At the lower end of an impact stroke, the impact piston 3 strikes a buffer system 15, which is shown enlarged in FIG. 2. It consists of a first, hard-elastic buffer element 16, which expediently consists of cross-linked polyurethane. Its contact surface 18 directed against the conical base 17 of the cylinder base 9 is also frustoconical, but its cone angle is smaller than the cone angle of the base. When the buffer system is in a relaxed position, there is therefore a space 19 between the base 17 and the contact surface 18, while the buffer element 16 rests on the base 20.

Das Pufferelement 16 weist weiterhin einen zylindrischen Abschnitt 21 auf, dessen Aussendurchmesser grösser ist als der Innendurchmesser von Zylinder 2, so dass das Pufferelement 16 mit Vorspannung im Zylinder 2 angeordnet ist.The buffer element 16 also has a cylindrical section 21, the outside diameter of which is larger than the inside diameter of cylinder 2, so that the buffer element 16 is arranged in cylinder 2 with a prestress.

Gegen den Schlagkolben 3 gerichtet sitzt auf dem ersten Pufferelement 16 ein zweites Pufferelement 22 auf, das vorzugsweise aus zelligem Polyurethan-Elastomer besteht. Durch die zellige Struktur wird in bekannter Weise eine progressive Federkennlinie erreicht, seine gegen den Schlagkolben 3 gerichtete Stirnfläche 23 ist nach aussen abgeschrägt. Der Schlagkolben 3 weist eine zylindrische Vertiefung 24 auf, deren Innendurchmesser etwas grösser ist als der Aussendurchmesser von Pufferelement 22.A second buffer is seated on the first buffer element 16 against the percussion piston 3 element 22, which preferably consists of cellular polyurethane elastomer. Due to the cellular structure, a progressive spring characteristic is achieved in a known manner, its end face 23 directed against the percussion piston 3 is beveled outwards. The percussion piston 3 has a cylindrical recess 24, the inside diameter of which is somewhat larger than the outside diameter of the buffer element 22.

Fig. 2, linke Hälfte, zeigt das Puffersystem 15 in entspanntem Zustand, wobei der Schlagkolben 3 gerade das zweite Pufferelement 22 berührt. Zwischen Boden 17 und Kontaktfläche 18 besteht ein Zwischenraum 19. Zur Vernichtung der überschüssigen Schlagenergie wird jetzt das Puffersystem 15 zusammengedrückt, wie Fig. 2, rechte Hälfte, zeigt. Dabei wird das erste Pufferelement 16 durch das verdichtete zweite Pufferelement 22 so gespreizt, dass sich sein zylindrischer Abschnitt 21 über die Vorspannung hinaus gegen Zylinder 2 presst. Beim weiteren Abbremsen des Schlagkolbens 3 verschiebt sich einmal der zylindrische Abschnitt 21 gegen Zylinder 2 und Teile der Kontaktfläche 18 gegen den Bodengrund 20 unter erheblicher Reibung, wobei Energie unter Bildung von Wärme vernichtet wird. Diese Wärme lässt sich über die umgebenden Metallteile gut abführen.2, left half, shows the buffer system 15 in a relaxed state, the percussion piston 3 just touching the second buffer element 22. There is a space 19 between the bottom 17 and the contact surface 18. To destroy the excess impact energy, the buffer system 15 is now compressed, as shown in FIG. 2, right half. The first buffer element 16 is spread by the compressed second buffer element 22 such that its cylindrical section 21 presses against cylinder 2 beyond the pretension. When the percussion piston 3 is braked further, the cylindrical section 21 moves against the cylinder 2 and parts of the contact surface 18 against the substrate 20 with considerable friction, energy being dissipated to form heat. This heat can be easily dissipated via the surrounding metal parts.

Liegt Kontaktfläche 18 vollständig am Boden 17 auf, dann wirkt das erste Pufferelement 16 wie seither bekannt als harter Puffer, der unter innerer Verformung noch weitere überschüssige Schlagenergie aufnehmen kann.If the contact surface 18 lies completely on the floor 17, then the first buffer element 16 acts as a hard buffer, which has been known since then and which can absorb further excess impact energy under internal deformation.

Bei der eben beschriebenen Reibungsphase des Puffersystems 15 wird wenig Körperschall erzeugt bei äusserster Schonung der Pufferelemente. Tritt nach einer gewissen Zeit doch eine Abnützung der Pufferelemente ein, dann verstärkt sich der Körperschall und der Bedienungsmann wird darauf aufmerksam gemacht, dass die Pufferelemente ausgewechselt werden müssen.In the friction phase of the buffer system 15 just described, little structure-borne noise is generated with the buffer elements being treated with extreme care. If after a certain time the buffer elements wear out, the structure-borne noise increases and the operator is made aware that the buffer elements must be replaced.

Claims (7)

1. Cushioning system in nailing machines for knocking in nails etc., by means of a percussion piston (3) located in a cylinder (2) and operated by compressed air, having the following features:
a) the cushioning system (15) is located at the impact end of the cylinder (2) in order to absorb the excess impact energy of the percussion piston (3)
b) it consists of at least two cushioning elements (16 and 22) of different hardness
c) an initial hard elastic cushioning element (16) is supported on a base (17) adjacent to the cylinder (2)
d) a second, soft elastic cushioning element (22) acts in conjunction with the first cushioning element (16)

characterised in that a space (19) is provided between one part of the contact surface (18) of the first cushioning element (16) and the base (17), so that at least part of the first cushioning element (16), with its contact surface facing the cylinder leg (9), is moveable.
2. Cushioning system according to Claim 1, characterised in that the first cushioning element (16) is in the form of a cup-shaped truncated cone, at least part of which is supported by the conical base (17).
3. Cushioning system according to Claim 2, characterised in that the conical angle of the contact surface (18) of the first cushioning element (16) is smaller than the conical angle of the base (17).
4. Cushioning system according to one of the Claims 1 to 3, characterised in that the first cushioning element (16) has a cylindrical section (21) on its external circumference, said section having an external diameter which is greater than the internal diameter of the cylinder (2) around the first cushioning element (16).
5. Cushioning system according to one of the Claims 1 to 4, characterised in that the second cushioning element (22) is located on the first cushioning element (16).
6. Cushioning system according to Claim 5, characterised in that the percussion piston (3) has an open recess (24) which is open to the cushioning system (15), the internal diameter of said recess being greater than the external diameter of the second cushioning element (22).
7. Cushioning system according to Claim 6, characterised in that the end face (23) of the second cushioning element (22) faces the percussion piston (3) and is bevelled outwards.
EP81110132A 1980-12-18 1981-12-04 Buffer system in impact tools Expired EP0054782B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81110132T ATE15777T1 (en) 1980-12-18 1981-12-04 BUFFER SYSTEM FOR IMPACT DEVICES.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3047662 1980-12-18
DE3047662A DE3047662C2 (en) 1980-12-18 1980-12-18 Buffer system for impact devices

Publications (3)

Publication Number Publication Date
EP0054782A2 EP0054782A2 (en) 1982-06-30
EP0054782A3 EP0054782A3 (en) 1983-07-20
EP0054782B1 true EP0054782B1 (en) 1985-09-25

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ID=6119438

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81110132A Expired EP0054782B1 (en) 1980-12-18 1981-12-04 Buffer system in impact tools

Country Status (6)

Country Link
US (1) US4441644A (en)
EP (1) EP0054782B1 (en)
JP (1) JPS57121484A (en)
AT (1) ATE15777T1 (en)
CA (1) CA1157201A (en)
DE (1) DE3047662C2 (en)

Families Citing this family (47)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3119956C2 (en) * 1981-05-20 1984-11-22 Joh. Friedrich Behrens AG, 2070 Ahrensburg Sound-damped driving tool for fasteners
DE3232120A1 (en) * 1982-08-28 1984-03-01 Robert Bosch Gmbh, 7000 Stuttgart ELECTROMAGNETICALLY OPERATED IMPACT DEVICE
DE3412659A1 (en) * 1983-06-27 1985-01-17 Jürgen Ing.(grad.) 6600 Saarbrücken Hochstrasser TURNING DEVICE OPERATING ALTERNATELY IN OPPOSITE DIRECTIONS TO EASIER THE DRIVING IN OR EXTRACTION OF TUNING TUBES
GB2149712A (en) * 1983-11-14 1985-06-19 Umberto Monacelli Shock absorber arrangements for use in fastener driving apparatus
DE3437019C2 (en) * 1984-10-09 1994-01-20 Bosch Gmbh Robert Electromagnetically driven wrapping machine with an air damper
DE3702364A1 (en) * 1987-01-28 1988-08-04 Mo N Proizv Ob Mekh HAND TOOL for driving in fasteners
US4932480A (en) * 1988-12-16 1990-06-12 Illinois Tool Works Inc. Driving tool with air-cooled bumper
US5062857A (en) * 1990-06-05 1991-11-05 Advanced Prosthestetics Development Corporation Myoelectrically controlled knee joint locking device
US5224413A (en) * 1992-07-13 1993-07-06 Mosier Industries, Inc. Impact dampening means for power cylinders
DE9216394U1 (en) * 1992-12-02 1993-02-11 Joh. Friedrich Behrens AG, 2070 Ahrensburg Driver seal on a pneumatically operated device for driving fasteners
JPH07156078A (en) * 1993-12-03 1995-06-20 Kanematsu Nnk Corp Fastener striking tool
US5511759A (en) * 1994-05-26 1996-04-30 Steelcase, Inc. Hydraulic chair height adjustment mechanism
DE29508658U1 (en) * 1995-05-24 1995-07-27 Joh. Friedrich Behrens AG, 22926 Ahrensburg Driver for fasteners
US5617925A (en) * 1995-06-05 1997-04-08 Sencorp Assembly for decelerating a driver in a tool
JPH1029171A (en) * 1996-07-11 1998-02-03 Furukawa Co Ltd Vibration control mechanism for hydraulic breaker
US5782461A (en) * 1996-12-19 1998-07-21 Lord Corporation Snubber using bulk loading
DE19800847A1 (en) 1997-12-04 1999-06-17 Gerd Dr Ing Kellner Device for placing a fastening element in a setting surface and using the device
JP4350898B2 (en) 1998-07-01 2009-10-21 デビオファーム・ソシエテ・アノニム Novel cyclosporine with improved activity characteristics
US6044709A (en) * 1998-10-29 2000-04-04 Venturedyne, Ltd. Vibrator
US7815689B2 (en) 2003-11-18 2010-10-19 Victhom Human Bionics Inc. Instrumented prosthetic foot
US20050107889A1 (en) 2003-11-18 2005-05-19 Stephane Bedard Instrumented prosthetic foot
CA2556041C (en) * 2004-02-12 2015-04-21 Ossur Hf System and method for motion-controlled foot unit
US7896927B2 (en) * 2004-02-12 2011-03-01 össur hf. Systems and methods for actuating a prosthetic ankle based on a relaxed position
US8011549B2 (en) * 2004-04-02 2011-09-06 Black & Decker Inc. Flywheel configuration for a power tool
US7322506B2 (en) * 2004-04-02 2008-01-29 Black & Decker Inc. Electric driving tool with driver propelled by flywheel inertia
US7726536B2 (en) 2004-04-02 2010-06-01 Black & Decker Inc. Upper bumper configuration for a power tool
US7686199B2 (en) * 2004-04-02 2010-03-30 Black & Decker Inc. Lower bumper configuration for a power tool
US7204403B2 (en) * 2004-04-02 2007-04-17 Black & Decker Inc. Activation arm configuration for a power tool
US7503401B2 (en) * 2004-04-02 2009-03-17 Black & Decker Inc. Solenoid positioning methodology
US7331403B2 (en) * 2004-04-02 2008-02-19 Black & Decker Inc. Lock-out for activation arm mechanism in a power tool
US20050217416A1 (en) * 2004-04-02 2005-10-06 Alan Berry Overmolded article and method for forming same
US7975893B2 (en) * 2004-04-02 2011-07-12 Black & Decker Inc. Return cord assembly for a power tool
US8231039B2 (en) * 2004-04-02 2012-07-31 Black & Decker Inc. Structural backbone/motor mount for a power tool
US7165305B2 (en) * 2004-04-02 2007-01-23 Black & Decker Inc. Activation arm assembly method
US10882172B2 (en) 2004-04-02 2021-01-05 Black & Decker, Inc. Powered hand-held fastening tool
US8123099B2 (en) * 2004-04-02 2012-02-28 Black & Decker Inc. Cam and clutch configuration for a power tool
US8302833B2 (en) * 2004-04-02 2012-11-06 Black & Decker Inc. Power take off for cordless nailer
US7138595B2 (en) 2004-04-02 2006-11-21 Black & Decker Inc. Trigger configuration for a power tool
ATE531484T1 (en) * 2004-04-02 2011-11-15 Black & Decker Inc DRIVER CONFIGURATION FOR A POWER POWERED TOOL
CA2592042C (en) * 2004-12-22 2014-12-16 Oessur Hf Systems and methods for processing limb motion
US7131563B2 (en) * 2005-01-28 2006-11-07 De Poan Pneumatic Corp. Nail driver bumper
SE528516C2 (en) 2005-04-19 2006-12-05 Lisa Gramnaes Combined active and passive leg prosthesis system and a method for performing a movement cycle with such a system
US7556184B2 (en) * 2007-06-11 2009-07-07 Black & Decker Inc. Profile lifter for a nailer
AU2009232467B2 (en) * 2008-03-31 2014-11-20 Atlas Copco Airpower, Naamloze Venootschap Percussion tool
US7975777B2 (en) * 2008-12-19 2011-07-12 Robert Bosch Gmbh Cellular foam bumper for nailer
US9060884B2 (en) 2011-05-03 2015-06-23 Victhom Human Bionics Inc. Impedance simulating motion controller for orthotic and prosthetic applications
GB201308564D0 (en) * 2013-05-13 2013-06-19 Qinetiq Ltd Tool

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1285959B (en) * 1964-12-28 1968-12-19 Behrens Friedrich Joh Compressed air device for driving nails, staples or the like.
US3496840A (en) * 1968-01-29 1970-02-24 Fastener Corp Fastener driving apparatus
US3583496A (en) * 1969-02-19 1971-06-08 Behrens Friedrich Joh Compressed air-operated drive-in apparatus to drive-in fastening means such as nails, staples or the like
DE6915710U (en) * 1969-04-19 1969-09-18 Reich Maschf Gmbh Karl DEVICE FOR IMPACTING NAILS OR THE SAME.
US3653299A (en) * 1970-05-11 1972-04-04 Signode Corp Pneumatic piston return system and valve assembly for impact tools
US3760695A (en) * 1972-03-01 1973-09-25 Senco Products Resilient piston stop construction
DE2339163C2 (en) * 1973-08-02 1975-01-30 Karl M. Reich, Maschinenfabrik Gmbh, 7440 Nuertingen Impact buffer for impact devices
DE2510858C2 (en) * 1975-03-12 1987-01-08 Signode Corp., Glenview, Ill. Device for intercepting the impact piston of a pneumatically operated driving tool
DE2529873C3 (en) * 1975-07-04 1978-06-15 Heinrich Buehnen Kg, 2800 Bremen Power operated fastener driving tool
US4053093A (en) * 1975-11-28 1977-10-11 Thueringer Stephen E Air-actuated stapling gun improvement
JPS5854085Y2 (en) * 1977-11-14 1983-12-09 東京光学機械株式会社 slit lamp adjuster
JPS5852065Y2 (en) * 1979-02-19 1983-11-28 マックス株式会社 Nailer bumper device
JPS5623021U (en) * 1979-07-30 1981-03-02
US4320864A (en) * 1980-05-22 1982-03-23 Duo-Fast Corporation Muffler for fastener driving tool

Also Published As

Publication number Publication date
ATE15777T1 (en) 1985-10-15
EP0054782A3 (en) 1983-07-20
CA1157201A (en) 1983-11-22
US4441644A (en) 1984-04-10
DE3047662A1 (en) 1982-07-22
JPH0211388B2 (en) 1990-03-14
DE3047662C2 (en) 1985-02-21
EP0054782A2 (en) 1982-06-30
JPS57121484A (en) 1982-07-28

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