EP0240931A1 - Power wrench - Google Patents

Power wrench Download PDF

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Publication number
EP0240931A1
EP0240931A1 EP19870104859 EP87104859A EP0240931A1 EP 0240931 A1 EP0240931 A1 EP 0240931A1 EP 19870104859 EP19870104859 EP 19870104859 EP 87104859 A EP87104859 A EP 87104859A EP 0240931 A1 EP0240931 A1 EP 0240931A1
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EP
European Patent Office
Prior art keywords
housing
recess
power screwdriver
screwdriver according
leg
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.)
Granted
Application number
EP19870104859
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German (de)
French (fr)
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EP0240931B1 (en
Inventor
Gustav Frohn
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.)
Enerpac Tool Group Corp
Original Assignee
Applied Power Inc
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Publication date
Application filed by Applied Power Inc filed Critical Applied Power Inc
Publication of EP0240931A1 publication Critical patent/EP0240931A1/en
Application granted granted Critical
Publication of EP0240931B1 publication Critical patent/EP0240931B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/0078—Reaction arms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
    • B25B21/004—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose of the ratchet type
    • B25B21/005—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose of the ratchet type driven by a radially acting hydraulic or pneumatic piston

Definitions

  • the invention relates to a power wrench with a housing in which a tensioning lever is held pivotably by at least one piston about an axis perpendicular to its axis and to which a support leg for deriving the counter-torque when screwing onto an outer abutment is adjustably connected.
  • the invention is therefore based on the object of designing a power wrench of the type mentioned at the outset in such a way that the possibility of a simple and rapid change in the position and in particular the effective length of the support leg without changing its direction of action can be achieved with little manufacturing effort and with full preservation of the connection strength can be preserved.
  • the invention provides a secure and non-rotatable connection between the housing and the support foot, and it enables a simple change in the position of the support foot, in particular also perpendicular to Direction of movement of the piston for the pivoting of the clamping lever and thus to the screwing direction and a quick exchange of the support foot for another.
  • the invention leads to simplifications for the manufacture of the housing with regard to the support foot mounting.
  • the power wrench shown in Fig. 1 has a housing 1, in which a working piston 5 is guided in a longitudinally displaceable manner in an axial bore, which can be acted upon by a hydraulic connection 18 with driving force, and then undergoes an adjustment to the right. With this adjustment, the working piston 5 works on the head of a tensioning lever 4 which is held in the housing 1 so as to be pivotable about an axis of rotation 11 which, in practical use of the power screwdriver, coincides with the central axis of a nut or screw to be tightened or loosened. They are limited by the pivoting movement of the tensioning lever 4 triggered by the adjustment of the working piston 5 by means of a stop piece 7 adjoining the cylinder part of the housing 1.
  • a reset piston 13 is also held, which has the same active axis as the working piston 5 and is acted upon by a return spring 31 after relieving the working piston 5 from the hydraulic pressure, the pivoting back of the clamping lever 4 about the axis of rotation 11.
  • a tensioning wheel 6 is mounted coaxially to the axis of rotation 11 in the tensioning lever 4, which via a spring-loaded drive pawl 9 is taken, but does not change its rotational position during the return movement of the clamping lever 4.
  • This tensioning wheel 6 contains in its center coaxial to the axis of rotation 11 a square hole 8 which serves as a connection to the screw or nut to be tightened or loosened. This connection can be made either directly via the square hole 8 itself or with the interposition of a socket 12, as shown in Fig. 2.
  • the housing 1 contains a recess 2 which passes through the housing 1 in its full width transversely to the direction of displacement of the working piston 5 in the axial bore in the housing 1 receiving it.
  • this recess 2 has the shape of a lying bone with a larger longitudinal extension in the direction of movement of the working piston 5 and end extensions.
  • a threaded bore 3 opens into the recess 2 parallel and perpendicular to the direction of movement of the working piston 5, both of which each extend to the outside of the housing 1.
  • the recess 2 in the housing 1 serves as a receptacle and holder for a support leg 10, with clamping screws 34 which can be screwed into the threaded bores 3 to fix it on the housing 1 and which act on the support foot 10 with their inner ends and in the recess 2 in the recess hold the desired position.
  • the support leg 10 is formed in the form of an L in the exemplary embodiment shown, and it has a longer leg 14 and a shorter leg 16, as the illustration in FIG. 2 shows. With the longer leg 14, the support leg 10 can be inserted more or less far into the recess 2 in the housing 1, for which purpose the cross section of the leg 14 is adapted to that of the recess 2. In this way, the support foot 10 can be adjusted with a precise fit relative to the housing 1, while maintaining its angular position relative to the housing 1.
  • the direction of the two legs 14 and 16 of the support foot 20 relative to one another corresponds to the orientation the longitudinal direction of the recess 2 in the housing 1 relative to the axial bore for the working piston 5.
  • the recess 2 runs perpendicular to the axial bore for the working piston 5, that is to say perpendicular to its direction of movement, and accordingly the two legs 14 and 16 also run in the L-shape of the support leg 10 perpendicular to each other.
  • the subject matter of the invention can be defined as a power wrench in which, with the help of an adjustable support foot, the counter-torque that occurs during the screwing process with the piston-operated pivoting of a tensioning lever with a ratchet-like tensioning wheel can be derived from an external abutment.
  • the support foot in the housing of the power screwdriver is received and held in a continuous recess which gives the support foot a fixed angular position relative to the housing, but permits adjustment of the support foot, in particular transversely to the active axis of the working piston, for the screwing process.
  • the shape of a bone with extended ends or a dumbbell is preferred, the larger cross section extending expediently parallel to the direction of movement of the working piston for the pivoting lever pivoting.
  • the recess penetrates the housing perpendicular to this direction of movement, and the support foot has the shape of an L with mutually perpendicular legs, one of which is accommodated in the recess in the housing, while the other can be attached to the outer abutment, intermediate pieces, if necessary can be used.

Abstract

Power wrench, in which, with the aid of an adjustable supporting foot (10), the torque reaction occurring during the screwing process, with piston-actuated swivelling of a clamping lever (4) by a clamping wheel (6) working in the manner of a ratchet, can be diverted to an outer abutment. For simple adjustability, the supporting foot (10) can be introduced to variable depths into a recess (2) penetrating into the housing (1) of the power wrench, which recess in cross-section preferably has the shape of a bone widened at the ends, or a dumbbell, and runs through the housing (1) transversely to the direction of movement of the working piston (5) for swivelling the clamping lever (4). The supporting foot (10) can be fixed at any desired point in the recess (2) with the aid of clamping screws (34). <IMAGE>

Description

Die Erfindung betrifft einen Kraftschrauber mit einem Gehäuse, in dem ein Spannhebel durch wenigstens einen Kolben um eine zu dessen Achse senkrechte Achse verschwenkbar gehalten ist und mit dem ein Stützfuß für die Ableitung des Gegenmoments beim Schrauben auf ein äußeres Widerlager verstellbar verbunden ist.The invention relates to a power wrench with a housing in which a tensioning lever is held pivotably by at least one piston about an axis perpendicular to its axis and to which a support leg for deriving the counter-torque when screwing onto an outer abutment is adjustably connected.

Bei bekannten Kraftschraubern dieser Art wird die Verstellbar­keit des Stützfußes gegenüber dem Gehäuse mit Hilfe einer Verzah­nung am Gehäuse erreicht, an der sich der Stützfuß verdrehen läßt. Eine derartige Stützfußlagerung ist jedoch zum einen aufwendig in der Fertigung und zum anderen zwangsläufige Ursache für Richtungs­änderungen der Stützfußachse, die für den Schraubvorgang uner­wünschte Auswirkungen haben können.In known power screwdrivers of this type, the adjustability of the support foot relative to the housing is achieved by means of a toothing on the housing, on which the support foot can be rotated. However, such a support leg mounting is complex on the one hand and, on the other hand, an inevitable cause for changes in direction of the support leg axis, which can have undesirable effects for the screwing process.

Der Erfindung liegt daher die Aufgabe zugrunde, einen Kraft­schrauber der eingangs erwähnten Art so auszubilden, daß sich mit geringem Fertigungsaufwand und bei voller Wahrung der Verbindungs­festigkeit die Möglichkeit für eine einfache und rasche Verände­rung der Lage und insbesondere der wirksamenen Länge des Stützfußes ohne Änderung von dessen Wirkungsrichtung erhalten läßt.The invention is therefore based on the object of designing a power wrench of the type mentioned at the outset in such a way that the possibility of a simple and rapid change in the position and in particular the effective length of the support leg without changing its direction of action can be achieved with little manufacturing effort and with full preservation of the connection strength can be preserved.

Die gestellte Aufgabe wird gemäß der Erfindung gelöst durch einen Kraftschrauber, wie er im Patentanspruch 1 gekennzeichnet ist; vor­teilhafte Ausgestaltungen und Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen.The object is achieved according to the invention by a power wrench as characterized in claim 1; advantageous refinements and developments of the invention result from the subclaims.

Die Erfindung ergibt eine sichere und drehfeste Verbindung zwi­schen Gehäuse und Stützfuß, und sie ermöglicht eine einfache Ver­änderung der Lage des Stützfußes insbesondere auch senkrecht zur Bewegungsrichtung des Kolbens für die Verschwenkung des Spannhebels und damit zur Schraubrichtung und einen raschen Austausch des Stütz­fußes gegen einen anderen. Außerdem führt die Erfindung zu Verein­fachungen für die Gehäusefertigung hinsichtlich der Stützfußlagerung.The invention provides a secure and non-rotatable connection between the housing and the support foot, and it enables a simple change in the position of the support foot, in particular also perpendicular to Direction of movement of the piston for the pivoting of the clamping lever and thus to the screwing direction and a quick exchange of the support foot for another. In addition, the invention leads to simplifications for the manufacture of the housing with regard to the support foot mounting.

Für die weitere Erläuterung der Erfindung und ihrer Vorteile wird nunmehr auf die Zeichnung Bezug genommen, in der ein bevor­zugtes Ausführungsbeipsiel für die Erfindung veranschaulicht ist; im einzelnen zeigen in der Zeichnung:

  • Fig. 1 einen Längsschnitt durch einen Kraftschrauber gemäß der Erfindung und
  • Fig. 2 eine Draufsicht auf den Kraftschrauber von Fig. 1.
For the further explanation of the invention and its advantages, reference is now made to the drawing, in which a preferred exemplary embodiment of the invention is illustrated; show in detail in the drawing:
  • Fig. 1 shows a longitudinal section through a power wrench according to the invention and
  • FIG. 2 is a top view of the power wrench of FIG. 1.

Der in Fig. 1 gezeigte Kraftschrauber besitzt ein Gehäuse 1, in dem in einer Axialbohrung ein Arbeitskolben 5 längsverschieblich geführt ist, der über einen Hydraulikanschluß 18 mit Antriebskraft beaufschlagt werden kann, und dann eine Verstellung nach rechts erfährt. Bei dieser Verstellung wikrt der Arbeitskolben 5 auf den Kopf eines Spannhebels 4, der im Gehäuse 1 um eine Drehachse 11 schwenkbar gehalten ist, die im praktischen Einsatz des Kraft­schraubers mit der Mittelachse einer anzuziehenden oder zu lösen­den Mutter oder Schraube zusammenfällt. Ihre Begrenzung findet die durch die Verstellung des Arbeitskolbens 5 ausgelöste Schwenkbe­wegung des Spannhebels 4 durch ein an den Zylinderteil des Gehäuses 1 anschließendes Anschlagstück 7. In diesem Anschlagstück 7 ist außerdem ein Rückstellkolben 13 gehalten, der die gleiche Wirkachse aufweist wie der Arbeitskolben 5 und unter Beaufschlagung durch eine Rückstellfeder 31 nach der Entlastung des Arbeitskolbens 5 vom Hydraulikdruck die Rückverschwenkung des Spannhebels 4 um die Dreh­achse 11 herbeiführt.The power wrench shown in Fig. 1 has a housing 1, in which a working piston 5 is guided in a longitudinally displaceable manner in an axial bore, which can be acted upon by a hydraulic connection 18 with driving force, and then undergoes an adjustment to the right. With this adjustment, the working piston 5 works on the head of a tensioning lever 4 which is held in the housing 1 so as to be pivotable about an axis of rotation 11 which, in practical use of the power screwdriver, coincides with the central axis of a nut or screw to be tightened or loosened. They are limited by the pivoting movement of the tensioning lever 4 triggered by the adjustment of the working piston 5 by means of a stop piece 7 adjoining the cylinder part of the housing 1. In this stop piece 7 a reset piston 13 is also held, which has the same active axis as the working piston 5 and is acted upon by a return spring 31 after relieving the working piston 5 from the hydraulic pressure, the pivoting back of the clamping lever 4 about the axis of rotation 11.

Koaxial zur Drehachse 11 ist im Spannhebel 4 ein Spannrad 6 ge­lagert, das bei der Arbeitsbewegung des Spannhebels 4 über eine federbelastete Antriebsklinke 9 mitgenommen wird, bei der Rückstell­bewegung des Spannhebels 4 jedoch seine Drehstellung nicht ändert. Dieses Spannrad 6 enthält in seinem Zentrum koaxial zur Drehachse 11 ein Vierkantloch 8, das als Verbindung zu der anzuziehenden oder zu lösenden Schraube oder Mutter dient. Diese Verbindung kann ent­weder unmittelbar über das Vierkantloch 8 selbst oder aber unter Zwischenschaltung einer Stecknuß 12 erfolgen, wie sie in Fig. 2 dargestellt ist.A tensioning wheel 6 is mounted coaxially to the axis of rotation 11 in the tensioning lever 4, which via a spring-loaded drive pawl 9 is taken, but does not change its rotational position during the return movement of the clamping lever 4. This tensioning wheel 6 contains in its center coaxial to the axis of rotation 11 a square hole 8 which serves as a connection to the screw or nut to be tightened or loosened. This connection can be made either directly via the square hole 8 itself or with the interposition of a socket 12, as shown in Fig. 2.

Unterhalb der Bohrung mit dem Arbeitskolben 5 enthält das Gehäuse 1 eine Ausnehmung 2, die das Gehäuse 1 in dessen voller Breite quer zur Verschiebungsrichtung des Arbeitskolbens 5 in der ihn aufnehmen­den Axialbohrung im Gehäuse 1 durchsetzt. In ihrem Querschnitt weist diese Ausnehmung 2 die Form eines liegenden Knochens mit in der Bewegungsrichtung des Arbeitskolbens 5 größerer Längserstrek­kung und endseitigen Erweiterungen auf. In die Ausnehmung 2 münden parallel und senkrecht zur Bewegungsrichtung des Arbeitskolbens 5 je eine Gewindebohrung 3, die beide jeweils bis zur Außenseite des Gehäuses 1 reichen. Die Ausnehmung 2 im Gehäuse 1 dient als Aufnahme und Halterung für einen Stützfuß 10, wobei zu dessen Festlegung am Gehäuse 1 in die Gewindebohrungen 3 Klemmschrauben 34 einschraubbar sind, die mit ihren inneren Enden auf den Stützfuß 10 einwirken und diesen in der Ausnehmung 2 in der jeweils gewünschten Stellung festhalten.Below the bore with the working piston 5, the housing 1 contains a recess 2 which passes through the housing 1 in its full width transversely to the direction of displacement of the working piston 5 in the axial bore in the housing 1 receiving it. In its cross-section, this recess 2 has the shape of a lying bone with a larger longitudinal extension in the direction of movement of the working piston 5 and end extensions. A threaded bore 3 opens into the recess 2 parallel and perpendicular to the direction of movement of the working piston 5, both of which each extend to the outside of the housing 1. The recess 2 in the housing 1 serves as a receptacle and holder for a support leg 10, with clamping screws 34 which can be screwed into the threaded bores 3 to fix it on the housing 1 and which act on the support foot 10 with their inner ends and in the recess 2 in the recess hold the desired position.

Der Stützfuß 10 ist bei dem dargestellten Ausführungsbeispiel in Form eines L ausgebildet, und er besitzt einen längeren Schenkel 14 und einen kürzeren Schenkel 16, wie die Darstellung in Fig. 2 zeigt. Mit dem längeren Schenkel 14 ist der Stützfuß 10 mehr oder weniger weit in die Ausnehmung 2 im Gehäuse 1 einführbar, wozu der Quer­schnitt des Schenkels 14 dem der Ausnehmung 2 angepaßt ist. Auf diese Weise läßt sich der Stützfuß 10 paßgenau relativ zum Gehäuse 1 verstellen, wobei er seine Winkelstellung gegenüber dem Gehäuse 1 beibehält. Die Richtung der beiden Schenkel 14 und 16 des Stütz­fußes 20 relativ zueinander korrespondiert mit der Orientierung der Längsrichtung der Ausnehmung 2 im Gehäuse 1 relativ zur Axial­bohrung für den Arbeitskolben 5. Bei dem dargestellten Beispiel verläuft die Ausnehmung 2 senkrecht zu der Axialbohrung für den Arbeitskolben 5, also senkrecht zu dessen Bewegungsrichtung, und entsprechend verlaufen auch die beiden Schenkel 14 und 16 in der L-Form des Stützfußes 10 senkrecht zueinander.The support leg 10 is formed in the form of an L in the exemplary embodiment shown, and it has a longer leg 14 and a shorter leg 16, as the illustration in FIG. 2 shows. With the longer leg 14, the support leg 10 can be inserted more or less far into the recess 2 in the housing 1, for which purpose the cross section of the leg 14 is adapted to that of the recess 2. In this way, the support foot 10 can be adjusted with a precise fit relative to the housing 1, while maintaining its angular position relative to the housing 1. The direction of the two legs 14 and 16 of the support foot 20 relative to one another corresponds to the orientation the longitudinal direction of the recess 2 in the housing 1 relative to the axial bore for the working piston 5. In the example shown, the recess 2 runs perpendicular to the axial bore for the working piston 5, that is to say perpendicular to its direction of movement, and accordingly the two legs 14 and 16 also run in the L-shape of the support leg 10 perpendicular to each other.

Zusammenfassend läßt sich der Gegenstand der Erfindung definieren als ein Kraftschrauber, bei dem mit Hilfe eines verstellbaren Stütz­fußes das während des Schraubvorganges unter kolbenbetätigter Ver­schwenkung eines Spannhebels mit einem ratschenartig arbeitenden Spannrad auftretende Gegenmoment auf ein äußeres Widerlager abge­leitet werden kann. Dabei findet der Stützfuß im Gehäuse des Kraft­schraubers Aufnahme und Halt in einer durchgehenden Ausnehmung, die dem Stützfuß eine feste Winkelstellung relativ zum Gehäuse vorgibt, aber eine Verstellung des Stützfußes insbesondere quer zur Wirk­achse des Arbeitskolbens für den Schraubvorgang zuläßt. Für den Querschnitt der den Stützfuß aufnehmenden Ausnehmung im Gehäuse ist die Form eines Knochens mit erweiterten Enden bzw. einer Hantel bevorzugt, wobei die größere Querschnittserstreckung zweckmäßig parallel zur Bewegungsrichtung des Arbeitskolbens für die Spann­hebelverschwenkung verläuft. Die Ausnehmung durchsetzt das Gehäuse senkrecht zu dieser Bewegungsrichtung, und der Stützfuß weist die Form eines L mit zueinander senkrechten Schenkeln auf, von denen der eine Aufnahme in der Ausnehmung im Gehäuse findet, während der andere an das äußere Widerlager ansetzbar ist, wobei gegebenenfalls noch Zwischenstücke einsetzbar sind.In summary, the subject matter of the invention can be defined as a power wrench in which, with the help of an adjustable support foot, the counter-torque that occurs during the screwing process with the piston-operated pivoting of a tensioning lever with a ratchet-like tensioning wheel can be derived from an external abutment. The support foot in the housing of the power screwdriver is received and held in a continuous recess which gives the support foot a fixed angular position relative to the housing, but permits adjustment of the support foot, in particular transversely to the active axis of the working piston, for the screwing process. For the cross section of the recess in the housing receiving the support foot, the shape of a bone with extended ends or a dumbbell is preferred, the larger cross section extending expediently parallel to the direction of movement of the working piston for the pivoting lever pivoting. The recess penetrates the housing perpendicular to this direction of movement, and the support foot has the shape of an L with mutually perpendicular legs, one of which is accommodated in the recess in the housing, while the other can be attached to the outer abutment, intermediate pieces, if necessary can be used.

Claims (9)

1. Kraftschrauber mit einem Gehäuse, in dem ein Spannhebel durch wenigstens einen Kolben um eine zu dessen Achse senkrechte Achse verschwenkbar gehalten ist und mit dem ein Stützfuß für die Ableitung des Gegenmoments beim Schrauben auf ein äußeres Widerlager verstellbar verbunden ist, dadurch gekennzeichnet, daß das Gehäuse (1) eine unter einem Winkel von vorzugsweise 90° zur Bewegungsrichtung des Kolbens (5) verlaufende Ausnehmung (2) enthält und daß der Stützfuß (10) auf eine Einführung in diese Ausnehmung (2) mit einem unter einem korrespondierenden Winkel gegen seine Wirkungsrichtung verlaufenden Teilstück (Schenkel 14) und variabler Tiefeneinstellung eingerichtet ist.1. Power screwdriver with a housing in which a clamping lever is pivotally held by at least one piston about an axis perpendicular to its axis and with which a support leg for deriving the counter-torque when screwing to an external abutment is adjustably connected, characterized in that the Housing (1) contains a recess (2) which extends at an angle of preferably 90 ° to the direction of movement of the piston (5) and that the support foot (10) has an insertion into this recess (2) at a corresponding angle against its direction of action running section (leg 14) and variable depth setting is set up. 2. Kraftschrauber nach Anspruch 1, dadurch gekennzeichnet, daß die Ausnehmung (2) das Gehäuse (1) voll durchsetzt.2. Power screwdriver according to claim 1, characterized in that the recess (2) fully penetrates the housing (1). 3. Kraftschrauber nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Ausnehmung (2) im Gehäuse (1) einen Querschnitt mit größerer Erstreckung parallel zur Hauptrichtung des an das äußere Widerlager ansetzbaren Teils (Schenkel 16) des Stütz­fußes (10) aufweist.3. Power screwdriver according to claim 1 or 2, characterized in that the recess (2) in the housing (1) has a cross section with a larger extension parallel to the main direction of the attachable to the outer abutment part (leg 16) of the support foot (10). 4. Kraftschrauber nach einem der Ansprüche 1 bis 3, dadurch gekenn­zeichnet, daß die Ausnhemung (2) im Gehäuse (1) im Querschnitt die Form eines Knochens mit erweiterten Enden aufweist.4. Power screwdriver according to one of claims 1 to 3, characterized in that the recess (2) in the housing (1) has the shape of a bone with enlarged ends in cross section. 5. Kraftschrauber nach einem der Ansprüche 1 bis 4, dadurch gekenn­zeichnet, daß der Stützfuß (10) in Form eines L mit einem in die Ausnehmung (2) im Gehäuse (1) einführbaren längeren Schenkel (14) und einem an das äußere Widerlager ansetzbaren kürzeren Schen­kel (16) ausgebildet ist.5. Power screwdriver according to one of claims 1 to 4, characterized in that the support leg (10) in the form of an L with an insertable into the recess (2) in the housing (1) longer leg (14) and one attachable to the outer abutment shorter leg (16) is formed. 6. Kraftschrauber nach Anspruch 5, dadurch gekennzeichnet, daß die beiden Schenkel (14 und 16) des Stützfußes (10) rechtwinklig zueinander verlaufen.6. Power screwdriver according to claim 5, characterized in that the two legs (14 and 16) of the support foot (10) are perpendicular to each other. 7. Kraftschrauber nach einem der Ansprüche 1 bis 6, dadurch gekenn­zeichnet, daß der Stützfuß (10) in der Ausnehmung (2) im Gehäuse (1) mittels wenigstens einer Klemmschraube (34) festlegbar ist.7. Power screwdriver according to one of claims 1 to 6, characterized in that the support foot (10) in the recess (2) in the housing (1) can be fixed by means of at least one clamping screw (34). 8. Kraftschrauber nach Anspruch 7, dadurch gekennzeichnet, daß wenigstens zwei Klemmschrauben (34) mit zueinander senkrechter Wirkungsrichtung für die Festlegung des Stützfußes (10) in der Ausnehmung (2) im Gehäuse (1) vorgesehen sind.8. Power screwdriver according to claim 7, characterized in that at least two clamping screws (34) are provided with mutually perpendicular direction of action for the fixing of the support foot (10) in the recess (2) in the housing (1). 9. Kraftschrauber nach Anspruch 7 oder 8, dadurch gekennzeichnet, daß das Gehäuse (1) wenigstens eine quer zur Achsrichtung der Ausnehmung (2) im Gehäuse (1) verlaufende Gewindebohrung (3) für die Aufnahme der Klemmschrauben (34) enthält.9. Power screwdriver according to claim 7 or 8, characterized in that the housing (1) contains at least one transverse bore to the axial direction of the recess (2) in the housing (1) threaded bore (3) for receiving the clamping screws (34).
EP19870104859 1986-04-04 1987-04-02 Power wrench Expired - Lifetime EP0240931B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863611368 DE3611368A1 (en) 1986-04-04 1986-04-04 POWER SCREWDRIVER
DE3611368 1986-04-04

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EP0240931A1 true EP0240931A1 (en) 1987-10-14
EP0240931B1 EP0240931B1 (en) 1991-11-13

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EP19870104859 Expired - Lifetime EP0240931B1 (en) 1986-04-04 1987-04-02 Power wrench

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DE (2) DE3611368A1 (en)
ES (1) ES2027984T3 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0362415A1 (en) * 1987-06-13 1990-04-11 Paul-Heinz Wagner Hydraulic power screw driver
EP0432884A2 (en) * 1989-12-15 1991-06-19 John K. Junkers Power wrench
DE4210511A1 (en) * 1992-03-31 1993-10-07 Wagner Paul Heinz Pressure operated power wrench - has straight cylindrical housing with opening at side of arm of rotary spanner and containing piston and cylinder with recoil mechanism
DE4210512A1 (en) * 1992-03-31 1993-10-07 Wagner Paul Heinz Hydraulic power wrench
WO2019036550A1 (en) * 2017-08-16 2019-02-21 HYTORC Division Unex Corporation Apparatus for tightening threaded fasteners

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2559327A1 (en) * 1975-12-31 1977-07-14 Guenter Trautmann Hydraulic multipurpose spanner for tight fasteners - has interchangeable ring and key attachments with slotted lever arm
DE3131582A1 (en) * 1981-08-10 1983-02-24 Hubert Prof. Dr.-Ing. 8000 München Kurz Device for turning countersunk head bolts

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2559327A1 (en) * 1975-12-31 1977-07-14 Guenter Trautmann Hydraulic multipurpose spanner for tight fasteners - has interchangeable ring and key attachments with slotted lever arm
DE3131582A1 (en) * 1981-08-10 1983-02-24 Hubert Prof. Dr.-Ing. 8000 München Kurz Device for turning countersunk head bolts

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0362415A1 (en) * 1987-06-13 1990-04-11 Paul-Heinz Wagner Hydraulic power screw driver
EP0432884A2 (en) * 1989-12-15 1991-06-19 John K. Junkers Power wrench
EP0432884A3 (en) * 1989-12-15 1991-08-21 John K. Junkers Power wrench
DE4210511A1 (en) * 1992-03-31 1993-10-07 Wagner Paul Heinz Pressure operated power wrench - has straight cylindrical housing with opening at side of arm of rotary spanner and containing piston and cylinder with recoil mechanism
DE4210512A1 (en) * 1992-03-31 1993-10-07 Wagner Paul Heinz Hydraulic power wrench
US5311797A (en) * 1992-03-31 1994-05-17 Paul-Heinz Wagner Pressure-operated power wrench
WO2019036550A1 (en) * 2017-08-16 2019-02-21 HYTORC Division Unex Corporation Apparatus for tightening threaded fasteners

Also Published As

Publication number Publication date
DE3774466D1 (en) 1991-12-19
EP0240931B1 (en) 1991-11-13
DE3611368A1 (en) 1987-10-08
ES2027984T3 (en) 1992-07-01

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