EP2216142B1 - Manually operated air hammer with switchable vibration dampening - Google Patents

Manually operated air hammer with switchable vibration dampening Download PDF

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Publication number
EP2216142B1
EP2216142B1 EP09450206A EP09450206A EP2216142B1 EP 2216142 B1 EP2216142 B1 EP 2216142B1 EP 09450206 A EP09450206 A EP 09450206A EP 09450206 A EP09450206 A EP 09450206A EP 2216142 B1 EP2216142 B1 EP 2216142B1
Authority
EP
European Patent Office
Prior art keywords
handle body
working cylinder
hammer
body part
manually operated
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.)
Not-in-force
Application number
EP09450206A
Other languages
German (de)
French (fr)
Other versions
EP2216142A2 (en
EP2216142A3 (en
Inventor
Karl Meisenbichler
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.)
BBG Baugeraete GmbH
Original Assignee
BBG Baugeraete GmbH
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 BBG Baugeraete GmbH filed Critical BBG Baugeraete GmbH
Priority to SI200930059T priority Critical patent/SI2216142T1/en
Publication of EP2216142A2 publication Critical patent/EP2216142A2/en
Publication of EP2216142A3 publication Critical patent/EP2216142A3/en
Application granted granted Critical
Publication of EP2216142B1 publication Critical patent/EP2216142B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/24—Damping the reaction force
    • B25D17/245—Damping the reaction force using a fluid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/04—Handles; Handle mountings
    • B25D17/046—Sleeve-like handles surrounding the tool bit
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/005—Adjustable tool components; Adjustable parameters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/255—Switches

Definitions

  • the invention relates to a hand-held pneumatic hammer with vibration damping, consisting essentially of a handle body part and a run in this working cylinder with a percussion piston.
  • Pneumatic impactors as used in pneumatic hammers, are state of the art.
  • the hammers may be formed for guidance by an operator depending on the size and embodiment with side handles or a fist grip.
  • From the AT 501 861 A1 is a hand-guided, vibration damped pneumatic hammer known in which the handle body and the working cylinder in the longitudinal axis of the hammer out relative to each other are displaced and by means of these parts at least one ventilatable or compressed air acted upon damping chamber is formed by a displacement of the working cylinder in the handle body of a Middle position in interaction of components of these parts in the region of the damping chamber in each case a closed cavity or compression space is formed with a reducible by a further rectified displacement volume.
  • Such an effective vibration damping can be achieved in a favorable manner in each of the two axial directions, ie in the direction of impact and retraction of the hammer, however, a rigid connection of handle body and cylinder of the hammer is optionally desired for a particularly accurate leading drive.
  • the invention is an object of the invention to overcome the disadvantages of the generic state of the art and to provide a hand-held pneumatic hammer with switchable vibration damping, in which the (the) handle (s) is rigidly connected to the handle body part (are) and by a simple Means a vibration damping of the hammer is switchable.
  • the advantages achieved by the invention are essentially to be seen in that in a simple manner by means of slight displacement of an actuating device, eg. a pushbutton, the switching means can be provided. Furthermore, advantageously, the holding part for the pneumatic hammer remains geometrically unchanged, or rigid, which leaves a hammer guide with switched vibration damping for the operator without modification, whereby improved accuracy of the intended fracture effect is achieved.
  • an actuating device eg. a pushbutton
  • the switching means is integrated in the handle body.
  • This embodiment of the integrated switching means is also favorable in terms of manufacturing technology and operational reliability.
  • a reference list is intended to facilitate the assignment of the functional means and parts in the representations.
  • Fig. 1 and Fig. 2 schematically show a pneumatic hammer according to the invention with a handle body part 1 and a working cylinder 2 with a percussion piston.
  • a working cylinder 2 is arranged in a handle body part 1 of a pneumatic hammer according to the invention, which is limitedly movable in the longitudinal direction.
  • a damping chamber 6 is formed by a recess 11.
  • a movable in the handle body part 1 working cylinder 2 has spaced from its end portion 23 a region 24 with an enlarged diameter in the hammering direction in the damping chamber 6, through which in this a damping surface 21 and in the opposite direction outside of the damping chamber 6, a stop 22 are formed to the handle body part 21 out ,
  • a switching means 5, which is preferably integrated in the handle body part 1, has a switching part 51, by means of which on the one hand via a switching air inlet 15 and a bore 14, a sliding space 4 between handle body part 1 and end portion 23 from the working cylinder 2 with compressed air D can be supplied.
  • a changeover from the switching part 51 causes a completion of the switching air inlet and a free connection of the displacement chamber 4 to the ambient air U.
  • a sliding chamber 4 between the end portion 23 of the working cylinder 2 and a handle body part 1 is, as Fig. 1 shows, connected via a bore 14 and by a position of a switching member 51 in the switching means 5 with the ambient air U.
  • Fig. 2 now shows an adjustment of a pneumatic hammer according to the invention, as this is preferred for highly accurate propulsion and impact work.
  • the switching part 51 from the switching means 5 causes immediately after activation of the hammer a compressed air supply D via the switching air inlet 15 and a bore 14 in a sliding space 4.
  • a pressure force caused thereby on the end portion 23 of the working cylinder fixed this with the stopper 22 on the stop surface 12 of the handle body 1.
  • Even with harder punches on the cylinder 2 is an immovable positioning of the same on the stop surface 22 to the stop surface 12 from the handle body part 1 and such a desired rigid connection between the parts.
  • a light vibration damping of a hand-operated pneumatic hammer of the type according to the invention which can be switched directly in operation, on the one hand represents a health-promoting equipment for an operator and on the other hand is an effective precision instrument for targeted advances and breaking operations.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)

Description

Die Erfindung bezieht sich auf einen handgeführten Drucklufthammer mit Vibrationsdämpfung, bestehend im Wesentlichen aus einem Griffkörperteil und einem in diesem geführten Arbeitszylinder mit einem Schlagkolben.The invention relates to a hand-held pneumatic hammer with vibration damping, consisting essentially of a handle body part and a run in this working cylinder with a percussion piston.

Pneumatische Schlagwerke, wie diese in druckluftbetriebenen Hämmern eingesetzt werden, sind Stand der Technik. Die Hämmer können zur Führung durch eine Bedienungsperson je nach Größe und Ausführungsform mit seitlichen Haltegriffen oder einem Faustgriff gebildet sein.Pneumatic impactors, as used in pneumatic hammers, are state of the art. The hammers may be formed for guidance by an operator depending on the size and embodiment with side handles or a fist grip.

Hämmer im praktischen, schlagenden Betrieb eines Bohrens oder Brechens in bzw. von harten Werkstoffen haben für die das Gerät führende Person Rückwirkungen durch Schläge oder Vibrationen auf deren Hände und Arme. Diese Schläge und Vibrationen werden durchwegs als störend empfunden und können bei einer Langzeitbedienung zu einer erheblichen Belastung und gegebenenfalls zu einer Gesundheitsgefährdung führen.Hammers in the practical, beating operation of drilling or breaking into hard materials have repercussions for the person carrying the device on their hands and arms by impacts or vibrations. These shocks and vibrations are consistently perceived as disturbing and can result in a long-term operation to a considerable burden and possibly to a health hazard.

Aus der AT 501 861 A1 ist ein handgeführter, vibrationsgedämpfter Drucklufthammer bekannt geworden, bei welchem der Griffkörper und der Arbeitszylinder in Längsachsrichtung des Hammers geführt relativ zueinander verschiebbar sind und mittels dieser Teile mindestens ein belüftbarer oder mit Druckluft beaufschlagbarer Dämpfungsraum gebildet ist, wobei durch eine Verschiebung des Arbeitszylinders im Griffkörper aus einer Mittelstellung bei Zusammenwirken von Komponenten dieser Teile im Bereich des Dämpfungsraumes jeweils ein geschlossener Hohlraum bzw. Kompressionsraum mit einem durch eine weitere gleichgerichtete Verschiebung verkleinerbaren Volumen gebildet ist.From the AT 501 861 A1 is a hand-guided, vibration damped pneumatic hammer known in which the handle body and the working cylinder in the longitudinal axis of the hammer out relative to each other are displaced and by means of these parts at least one ventilatable or compressed air acted upon damping chamber is formed by a displacement of the working cylinder in the handle body of a Middle position in interaction of components of these parts in the region of the damping chamber in each case a closed cavity or compression space is formed with a reducible by a further rectified displacement volume.

Eine derart wirkungsvolle Vibrationsdämpfung kann in günstiger Weise in jeweils beide Achsrichtungen, d.h. in Schlag- und Rückzugsrichtung des Hammers, erreicht werden, jedoch wird gegebenenfalls für einen besonders genau zu führenden Vortrieb eine starre Verbindung von Griffkörper und Arbeitszylinder des Hammers gewünscht.Such an effective vibration damping can be achieved in a favorable manner in each of the two axial directions, ie in the direction of impact and retraction of the hammer, however, a rigid connection of handle body and cylinder of the hammer is optionally desired for a particularly accurate leading drive.

Aus der AT 008 378 U1 ist ein handgeführter Druckluft-Abbruchhammer mit seitlichen Haltegriffen bekannt, welche Haltegriffe alternativ zur Schonung der Hände und Arme des Bedienungsmannes in Arbeitsrichtung bzw. in Schlagrichtung des Hammers rückfedemd schwenkend oder für genau auszuführende Arbeiten starr mit dem Griffkörper verbindbar sind. Durch eine derartige Umstellbarkeit einer Schwenkbarkeit des Haltemittels kann vielfach eine gute Dämpfungswirkung und, wenn gewünscht, eine Starrheit erreicht werden, beschränkt sich jedoch nur auf Druckluft-Abbruchhämmer mit zwei Haltegriffen.From the AT 008 378 U1 is a hand-held pneumatic demolition hammer with side handles known, which grab handles alternatively for the protection of the hands and arms of the operator in the direction of work or in the direction of the hammer backfedemd pivoting or rigidly connected to the handle body can be performed for exactly work. By such a reversibility of a pivoting of the holding means can often be a good damping effect and, if desired, a rigidity can be achieved, however, limited only to compressed air demolition hammers with two handles.

Der Erfindung liegt nun die Aufgabe zugrunde, die Nachteile im gattungsgemäßen Stand der Technik zu überwinden und einen handgeführten Drucklufthammer mit schaltbarer Vibrationsdämpfung zu schaffen, bei welchem der (die) Haltegriff(e) starr mit dem Griffkörperteil verbunden ist (sind) und durch ein einfaches Mittel eine Vibrationsdämpfung des Hammers schaltbar ist.The invention is an object of the invention to overcome the disadvantages of the generic state of the art and to provide a hand-held pneumatic hammer with switchable vibration damping, in which the (the) handle (s) is rigidly connected to the handle body part (are) and by a simple Means a vibration damping of the hammer is switchable.

Diese Aufgabe wird dadurch gelöst, dass zwischen Griffkörperteil und Arbeitszylinder eine mit Druckluft beaufschlagbare Dämpfungskammer gebildet ist, in welcher der Arbeitszylinder in Schlagrichtung des Kolbens einen vergrößerten Durchmesser und derart einen Ringquerschnitt mit einer Dämpfungsfläche aufweist und gegen die Schlagrichtung des Kolbens zwischen Arbeitszylinder und Griffkörper im Wesentlichen stirnseitig ein mit Druckluft beaufschlagbarer Verschieberaum ausgeformt ist, welcher Verschieberaum durch ein Schaltmittel wahlweise mit Druckluft beaufschlagbar oder mit der Umgebungsluft verbindbar ist.This object is achieved in that between the handle body part and the working cylinder is acted upon by compressed air damping chamber is formed in which the working cylinder in the direction of impact of the piston has an enlarged diameter and such a ring cross-section with a damping surface and against the direction of impact of the piston between the working cylinder and the handle body substantially the front side a compressed air acted upon Verschieberaum is formed, which displacement space is acted upon by a switching means optionally with compressed air or connectable to the ambient air.

Die mit der Erfindung erzielten Vorteile sind im Wesentlichen darin zu sehen, dass auf einfache Weise mittels leichten Verschiebens einer Betätigungseinrichtung, zB. eines Drucktasters, das Schaltmittel gestellt werden kann. Weiters verbleibt in vorteilhafter Weise der Halteteil für den Drucklufthammer geometrisch unverändert, bzw. starr, was eine Hammerführung auch mit zugeschalteter Vibrationsdämpfung für den Bedienungsmann ohne Veränderung lässt, wodurch eine verbesserte Genauigkeit der vorgesehenen Bruchwirkung erreicht wird.The advantages achieved by the invention are essentially to be seen in that in a simple manner by means of slight displacement of an actuating device, eg. a pushbutton, the switching means can be provided. Furthermore, advantageously, the holding part for the pneumatic hammer remains geometrically unchanged, or rigid, which leaves a hammer guide with switched vibration damping for the operator without modification, whereby improved accuracy of the intended fracture effect is achieved.

Bei Inbetriebnahme des Hammers durch Druckluftbeaufschlagung erfolgt allenfalls unmittelbar eine Positionierung des Arbeitszylinders zum Griffteil in Schlagrichtung, wobei eine Stellung des Schaltmittels eine Verschiebemöglichkeit oder eine pneumatische Fixierung der Teile zueinander bewirkt.When the hammer is put into operation by the application of compressed air, the positioning of the working cylinder towards the grip part in the direction of impact is at most immediate. wherein a position of the switching means causes a displacement possibility or a pneumatic fixation of the parts to each other.

Als besonders vorteilhaft in der Handhabung des erfindungsgemäßen Drucklufthammers hat es sich herausgestellt, wenn das Schaltmittel im Griffkörper integriert ist. Diese Ausführungsform des integrierten Schaltmittels ist auch herstellungstechnisch und hinsichtlich der Betriebssicherheit günstig.As a particularly advantageous in the handling of the pneumatic hammer of the invention, it has been found when the switching means is integrated in the handle body. This embodiment of the integrated switching means is also favorable in terms of manufacturing technology and operational reliability.

Ein Ausführungsbeispiel der Erfindung, welches lediglich einen Ausführungsweg derselben darstellt, ist in den Zeichnungen gezeigt und wird nachfolgend beschrieben.An embodiment of the invention, which merely illustrates an embodiment thereof, is shown in the drawings and will be described below.

Es zeigen

  • Fig. 1 einen erfindungsgemäßen Drucklufthammer mit zugeschalteter Vibrationsdämpfung
  • Fig. 2 einen erfindungsgemäßen Drucklufthammer im starren Betriebszustand
Show it
  • Fig. 1 a pneumatic hammer according to the invention with switched vibration damping
  • Fig. 2 a compressed air hammer according to the invention in the rigid operating state

Eine Bezugszeichenliste soll die Zuordnung der Funktionsmittel und Teile in den Darstellungen erleichtern.A reference list is intended to facilitate the assignment of the functional means and parts in the representations.

Es stellen dar:

1
Griffkörperteil
11
Ausnehmung im Griffkörperteil
12
Anschlagfläche
13
Drucklufteinlass
14
Bohrung
15
Schaltlufteinlass
2
Arbeitszylinder
21
Dämpfungsfläche
22
Anschlagfläche
23
Endteil
24
Bereich mit vergrößertem Durchmesser
3
Kolben (Schlagkolben)
4
Verschieberaum
5
Schaltmittel
51
Schaltteil
6
Dämpfungskammer
D
Druckluftanspeisung
U
Umgebungsluft
They show:
1
Grip body
11
Recess in the handle body part
12
stop surface
13
Compressed air inlet
14
drilling
15
Switching air intake
2
working cylinder
21
damping area
22
stop surface
23
end
24
Area with enlarged diameter
3
Piston (percussion piston)
4
shifting space
5
switching means
51
switching part
6
damping chamber
D
Druckluftanspeisung
U
ambient air

Fig. 1 und Fig. 2 zeigen schematisch einen erfindungsgemäßen Drucklufthammer mit einem Griffkörperteil 1 und einem Arbeitszylinder 2 mit einem Schlagkolben 3. Fig. 1 and Fig. 2 schematically show a pneumatic hammer according to the invention with a handle body part 1 and a working cylinder 2 with a percussion piston. 3

Auf eine Darstellung einer Druckluftumsteuerung für den Kolben bzw. für die Kolbenbewegung wird aus Gründen der Übersichtlichkeit der Figuren verzichtet.On a representation of a compressed air reversal for the piston or for the piston movement is omitted for reasons of clarity of the figures.

Wie Fig. 1 und Fig. 2 zeigen, ist in einem Griffkörperteil 1 eines erfindungsgemäßen Drucklufthammers ein Arbeitszylinder 2 angeordnet, der in Längsrichtung begrenzt bewegbar ist.As Fig. 1 and Fig. 2 show, a working cylinder 2 is arranged in a handle body part 1 of a pneumatic hammer according to the invention, which is limitedly movable in the longitudinal direction.

Im Griffkörperteil 1 ist durch eine Ausnehmung 11 eine Dämpfungskammer 6 gebildet. Ein im Griffkörperteil 1 bewegbarer Arbeitszylinder 2 weist beabstandet von seinem Endteil 23 einen Bereich 24 mit einem vergrößerten Durchmesser in Hammerschlagrichtung im Dämpfungsraum 6 auf, durch welchen in diesem eine Dämpfungsfläche 21 und in Gegenrichtung außerhalb des Dämpfungsraumes 6 ein Anschlag 22 zum Griffkörperteil 21 hin ausgeformt sind.In the handle body part 1, a damping chamber 6 is formed by a recess 11. A movable in the handle body part 1 working cylinder 2 has spaced from its end portion 23 a region 24 with an enlarged diameter in the hammering direction in the damping chamber 6, through which in this a damping surface 21 and in the opposite direction outside of the damping chamber 6, a stop 22 are formed to the handle body part 21 out ,

Ein Schaltmittel 5, welches bevorzugt im Griffkörperteil 1 integriert ist, weist ein Schaltteil 51 auf, durch welches einerseits über einen Schaltlufteinlass 15 und einer Bohrung 14 ein Verschieberaum 4 zwischen Griffkörperteil 1 und Endteil 23 vom Arbeitszylinder 2 mit Druckluft D versorgbar ist. Eine Umstellung vom Schaltteil 51 bewirkt einen Abschluss des Schaltlufteinlasses und eine freie Verbindung des Verschieberaumes 4 zur Umgebungsluft U.A switching means 5, which is preferably integrated in the handle body part 1, has a switching part 51, by means of which on the one hand via a switching air inlet 15 and a bore 14, a sliding space 4 between handle body part 1 and end portion 23 from the working cylinder 2 with compressed air D can be supplied. A changeover from the switching part 51 causes a completion of the switching air inlet and a free connection of the displacement chamber 4 to the ambient air U.

Erfolgt nun eine Zufuhr von Druckluft D zum Hammer mit einer Positionierung des Schaltteiles 51 im Schaltmittel 5 (wie in Fig. 1 dargestellt), so wird diese Druckluft nur über einen Drucklufteinlass 13 im Griffkörperteil 1 in die Dämpfungskammer 6 eingebracht. Mittels einer Dämpfungsfläche 21 am Arbeitszylinder 2 wird dieser in Schlagrichtung des Kolbens 3 gedrückt bis eine Anschlagfläche 22 auf jene 12 vom Griffkörperteil 1 trifft.If now a supply of compressed air D to the hammer with a positioning of the switching member 51 in the switching means 5 (as in Fig. 1 shown), this compressed air is introduced only via a compressed air inlet 13 in the handle body part 1 in the damping chamber 6. By means of a damping surface 21 on the working cylinder 2, this is in Impact direction of the piston 3 is pressed until a stop surface 22 meets 12 of the handle body part 1.

Ein Verschieberaum 4 zwischen Endteil 23 des Arbeitszylinders 2 und einem Griffkörperteil 1 ist, wie Fig. 1 zeigt, über eine Bohrung 14 und durch eine Stellung eines Schaltteiles 51 im Schaltmittel 5 mit der Umgebungsluft U verbunden.A sliding chamber 4 between the end portion 23 of the working cylinder 2 and a handle body part 1 is, as Fig. 1 shows, connected via a bore 14 and by a position of a switching member 51 in the switching means 5 with the ambient air U.

Werden nun harte Schläge im praktischen Hammerbetrieb gegen den Arbeitszylinder 2 eingebracht, so wird dieser gegen die Kraft der Druckluft auf die Dämpfungsfläche 21 im Griffkörperteil 1 federnd zurückgeschoben, weil vom Verschieberaum 4 kein merklicher Gegendruck auf den Endteil 23 des Arbeitszylinders 2 gegeben ist.Now hard punches are introduced in the practical hammer operation against the working cylinder 2, it is pushed back resiliently against the force of compressed air on the damping surface 21 in the handle body part 1, because of the sliding chamber 4 no significant back pressure on the end portion 23 of the working cylinder 2 is given.

Derart können harte Druckluft-Hammerschläge für die Hände und Arme einer Bedienungsperson wesentlich gemildert werden.In this way, hard compressed air hammer blows for the hands and arms of an operator can be substantially alleviated.

Fig. 2 zeigt nun eine Einstellung eines erfindungsgemäßen Drucklufthammers, wie dieser für höchst genaue Vortriebs- und Einschlagarbeiten bevorzugt ist. Fig. 2 now shows an adjustment of a pneumatic hammer according to the invention, as this is preferred for highly accurate propulsion and impact work.

Das Schaltteil 51 vom Schaltmittel 5 bewirkt unmittelbar nach Aktivierung des Hammers eine Druckluftzufuhr D über den Schaltlufteinlass 15 und eine Bohrung 14 in einen Verschieberaum 4. Eine dadurch bewirkte Druckkraft auf das Endteil 23 vom Arbeitszylinder fixiert diesen mit dem Anschlag 22 auf der Anschlagfläche 12 des Griffkörpers 1. Auch bei härteren Schlägen auf den Arbeitszylinder 2 erfolgt eine unverrückbare Positionierung desselben an der Anschlagfläche 22 zur Anschlagfläche 12 vom Griffkörperteil 1 und derart eine nach Maßgabe gewünschte starre Verbindung zwischen den Teilen.The switching part 51 from the switching means 5 causes immediately after activation of the hammer a compressed air supply D via the switching air inlet 15 and a bore 14 in a sliding space 4. A pressure force caused thereby on the end portion 23 of the working cylinder fixed this with the stopper 22 on the stop surface 12 of the handle body 1. Even with harder punches on the cylinder 2 is an immovable positioning of the same on the stop surface 22 to the stop surface 12 from the handle body part 1 and such a desired rigid connection between the parts.

Eine leichte, unmittelbar im Betrieb schaltbare Vibrationsdämpfung eines handbetriebenen Drucklufthammers der erfindungsgemäßen Art stellt einerseits ein die Gesundheit förderndes Betriebsmittel für einen Betreiber dar und ist andererseits ein wirkungsvolles Präzisionsinstrument für gezielte Vortriebe und Brecharbeiten.A light vibration damping of a hand-operated pneumatic hammer of the type according to the invention, which can be switched directly in operation, on the one hand represents a health-promoting equipment for an operator and on the other hand is an effective precision instrument for targeted advances and breaking operations.

Claims (2)

  1. Manually operated air hammer with switchable vibration dampening, consisting substantially of a handle body part (1) and a working cylinder (2) guided in it in a displaceable manner and including a percussion piston (3), a damping chamber (6), able to be biased by pressurised air, being formed between said handle body part (1) and said working cylinder (2), in which said working cylinder (2), in the direction of impact of said piston (3), comprises an enlarged diameter and, thus, an annular cross-section having a dampening surface (21), characterised in that a displacement space (4), able to be biased by pressurised air, is formed substantially at the front side against the direction of impact of said piston between said working cylinder (2) and the handle body (1), said displacement space (4) being selectively biased with pressurised air (D) or connected to ambient air (U) by switching means (5).
  2. Manually operated air hammer according to claim 1, characterised in that said switching means (5) is integrated into said handle body (1).
EP09450206A 2008-11-20 2009-10-29 Manually operated air hammer with switchable vibration dampening Not-in-force EP2216142B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI200930059T SI2216142T1 (en) 2008-11-20 2009-10-29 Manually operated air hammer with switchable vibration dampening

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT0181308A AT507210B1 (en) 2008-11-20 2008-11-20 HAND-HELD COMPRESSED AIR HAMMER WITH SWITCHABLE VIBRATION DAMPING

Publications (3)

Publication Number Publication Date
EP2216142A2 EP2216142A2 (en) 2010-08-11
EP2216142A3 EP2216142A3 (en) 2010-10-20
EP2216142B1 true EP2216142B1 (en) 2011-08-10

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ID=41667471

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09450206A Not-in-force EP2216142B1 (en) 2008-11-20 2009-10-29 Manually operated air hammer with switchable vibration dampening

Country Status (6)

Country Link
EP (1) EP2216142B1 (en)
AT (2) AT507210B1 (en)
ES (1) ES2370467T3 (en)
HR (1) HRP20110765T1 (en)
PT (1) PT2216142E (en)
SI (1) SI2216142T1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111716298B (en) * 2020-06-28 2021-07-23 山东沂蒙工具有限公司 Can utilize recoil force to vibrate rust cleaning hammer

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2596681B1 (en) * 1986-04-03 1988-06-10 Eimco Secoma HYDRAULIC PERCUSSION APPARATUS WITH RETURNING SHOCK WAVE DAMPING DEVICE
AT8378U1 (en) 2005-01-14 2006-07-15 Bbg Baugeraete Gmbh & Co Kg HAND-HELD COMPRESSED AIR CRASH HAMMER
AT501861B1 (en) * 2005-05-25 2009-08-15 Bbg Baugeraete Gmbh HAND-HELD, VIBRATION-STEAMED AIR HAMMER

Also Published As

Publication number Publication date
HRP20110765T1 (en) 2011-11-30
EP2216142A2 (en) 2010-08-11
AT507210A4 (en) 2010-03-15
EP2216142A3 (en) 2010-10-20
ES2370467T3 (en) 2011-12-16
ATE519569T1 (en) 2011-08-15
SI2216142T1 (en) 2011-10-28
AT507210B1 (en) 2010-03-15
PT2216142E (en) 2011-09-05

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