EP2394794B1 - Handwerkzeugmaschine mit pneumatischem Schlagwerk - Google Patents

Handwerkzeugmaschine mit pneumatischem Schlagwerk Download PDF

Info

Publication number
EP2394794B1
EP2394794B1 EP11164399.5A EP11164399A EP2394794B1 EP 2394794 B1 EP2394794 B1 EP 2394794B1 EP 11164399 A EP11164399 A EP 11164399A EP 2394794 B1 EP2394794 B1 EP 2394794B1
Authority
EP
European Patent Office
Prior art keywords
pneumatic chamber
anvil
sealing element
axis
volume
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.)
Active
Application number
EP11164399.5A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2394794A1 (de
Inventor
Markus Hartmann
Frank Kohlschmied
Christian Daubner
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.)
Hilti AG
Original Assignee
Hilti AG
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 Hilti AG filed Critical Hilti AG
Publication of EP2394794A1 publication Critical patent/EP2394794A1/de
Application granted granted Critical
Publication of EP2394794B1 publication Critical patent/EP2394794B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

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
    • B25D17/06—Hammer pistons; Anvils ; Guide-sleeves for pistons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D11/00—Portable percussive tools with electromotor or other motor drive
    • B25D11/005—Arrangements for adjusting the stroke of the impulse member or for stopping the impact action when the tool is lifted from the working surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2217/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D2217/0011—Details of anvils, guide-sleeves or pistons
    • B25D2217/0015—Anvils
    • 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
    • B25D2250/035—Bleeding holes, e.g. in piston guide-sleeves
    • 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
    • B25D2250/365—Use of seals

Definitions

  • the present invention relates to a machine tool, in particular a hand-guided chiseling machine tool, as from the preamble of claim 1 and the WO2009036526 A1 known.
  • a chisel action should be set when a chisel is lifted from a workpiece.
  • an air spring can be deactivated by means of additional ventilation openings, which are only opened when the bit is disengaged.
  • An anvil also known as an intermediate beater or anvil, should be kept away from the vents after a space. However, this is partly due to the rebound of the anus on a front stop is not given.
  • a machine tool has an anvil, a guide tube in which the anvil is guided along an axis, and a pneumatic chamber, which is closed by the striker, the guide tube and a self-medium-actuated valve device.
  • a volume of the pneumatic chamber changes with movement of the striker along the axis.
  • the intrinsic medium actuated valve means has a pivotable sealing element between the striker and the guide tube. The pivotable sealing element is pivoted in a folded position during movement of the striker in the direction of impact and in a movement of the striker against the direction of impact in an unfolded position. In the retracted position, the sealing element has a first inflow surface, defined by the projection of the sealing element on a plane perpendicular to the axis.
  • the sealing element In the deployed position, the sealing element has a second inflow surface, also defined as the area of a projection of the sealing element on the plane perpendicular to the axis.
  • the second inflow area is larger than the first inflow area.
  • the radial dimension of the sealing element In the folded position, the radial dimension of the sealing element is less than in the unfolded position.
  • the pneumatic chamber serves as an anvil brake, which is controlled by the direction of movement of the beatpiece.
  • the pneumatic chamber is closed by the valve means when the striker after, for example, a blank in the Machine tool runs into it.
  • the pressure changing with the movement of the striker in the pneumatic chamber caused deceleration of the striker.
  • the valve device opened the pneumatic chamber when the striker is moved in the direction of impact.
  • the brake is deactivated.
  • One embodiment provides that, if the volume of the pneumatic chamber during a movement of the striker in the direction of impact is increasing, the pivotable sealing element is pivoted in a folded towards the pneumatic chamber pressure gradients in the retracted position and at a rising towards the pneumatic chamber Pressure gradient is pivoted in the unfolded position, and if the volume of the pneumatic chamber with a movement of the striker in the direction of impact is decreasing, the pivotable sealing element pivoted in a direction to the pneumatic chamber increasing pressure gradient in the folded position and in a direction towards the pneumatic chamber sloping pressure gradient is pivoted in the unfolded position.
  • An embodiment has a further pneumatic chamber, which is closed by the striker, the guide tube and the self-medium-actuated valve means, the volume of a pneumatic chamber with a movement of the striker in the direction of impact increasing and a volume of the further pneumatic chamber in a movement of the Döppers is decreasing and wherein the pneumatic chamber and the other pneumatic chamber are connected by the self-medium-actuated valve device.
  • One embodiment provides that the sealing element attached to the striker and in the unfolded position a contact portion of the sealing element contacts the guide tube or alternatively attached the sealing element to the guide tube and contacts the striker in the unfolded position of the contact portion of the sealing element.
  • the contacting contact portion limits the pivotal movement of the movable portion of the sealing element. The sealing element is thereby stabilized in the unfolded position.
  • One embodiment provides that if the volume of the pneumatic chamber is increasing with a movement of the striker in the direction of impact, a pivot joint of the sealing element opposite the contact portion, along the axis, further away from the pneumatic chamber, and if the volume of the pneumatic chamber at a movement of the striker in the direction of impact is decreasing, the pivot joint of the sealing element relative to the contact portion, along the axis, closer to the pneumatic chamber is arranged.
  • the pivot joint may be formed by a solid-state joint.
  • the sealing element is fastened with a fastening portion on the striker or the guide tube and a lip of the sealing element is inclined relative to the axis, wherein if the volume of the pneumatic chamber is increasing with a movement of the striker in the direction of impact, the lip along the axis of the pneumatic chamber is inclined away from the mounting portion, and if the volume of the pneumatic chamber is decreasing in the impact direction when the striker is moving, the lip is inclined away from the mounting portion along the axis away from the pneumatic chamber.
  • the sealing element has a V- or U-shaped cross-sectional profile along the axis, wherein the cross-sectional profile is open towards the pneumatic chamber, if the volume of the pneumatic chamber is increasing in a movement of the striker in the direction of impact, and the cross-sectional profile is opened away from the pneumatic chamber, if the volume of the pneumatic chamber during a movement of the striker is decreasing in the direction of impact.
  • An embodiment provides that the sealing element is asymmetrical with respect to any plane perpendicular to the axis.
  • One embodiment has a stop on which the pivotable sealing element rests in the unfolded position and is spaced in the retracted position.
  • the stop supports the sealing element in the unfolded position against the forces acting on the sealing element.
  • One embodiment has a throttle that connects the pneumatic chamber to an air reservoir.
  • An effective cross-sectional area of the pneumatic chamber defined by the differential of the volume of the pneumatic chamber in the direction of impact is greater than one hundred times a cross-sectional area of the throttle.
  • the striker is moved parallel to the axis, resulting in a volume change of the pneumatic chamber proportional to the displacement along the axis and the effective cross-sectional area.
  • the effective cross-sectional area can be determined by the mathematical operation of differentiating according to the direction of movement or impact.
  • the effective cross-sectional area corresponds to the largest cross-sectional area perpendicular to the axis.
  • the ratio of the effective cross-sectional area of the pneumatic chamber to the Cross-sectional area of the throttle determines a relative flow velocity of the air in the throttle relative to the speed of the striker. From this relative flow rate, the air can escape quickly enough from the pneumatic chamber, without a pressure gradient builds up to the environment. It was recognized that an absolute speed of air in the throttle can not be exceeded. However, the throttle seems to lock a limit of absolute speed.
  • the ratio of one hundred times, preferably three hundred times, is chosen so that in a driven by the percussion striker, the absolute velocity of the air is achieved in the throttle, with a manually moving striker, the absolute speed is clearly below.
  • the throttle locks in the beaten doubler and opens when manually moving anvil.
  • a flow passage through the valve means may have a cross-sectional area which is less than one-hundredth of the effective cross-sectional area of the pneumatic chamber.
  • the cross-sectional area may, for example, be greater than 1/1500 or greater than 1/2000 of the effective cross-sectional area.
  • the cross-sectional area of the closed / throttling valve may be formed by bores, notches and / or grooves extending along the axis in the sealing element.
  • Fig. 1 shows a hammer drill 1 as an embodiment of a chiseling machine tool.
  • the hammer drill 1 has a machine housing 2, in which a motor 3 and a driven by the motor 3 pneumatic percussion 4 are arranged and a tool holder 5 is preferably releasably attached.
  • the motor 3 is, for example, an electric motor which is supplied with power via a wired mains connection 6 or a rechargeable battery system.
  • the pneumatic impact mechanism 4 drives a tool 7 inserted into the tool holder 5 , for example a drill bit or a chisel, away from the hammer drill 1 , along an axis 8 in the direction of impact 9 into a workpiece.
  • the hammer drill 1 optionally has a rotary drive 10 , which can rotate the tool 7 in addition to the striking movement about the axis 8 .
  • a rotary drive 10 which can rotate the tool 7 in addition to the striking movement about the axis 8 .
  • On the machine housing 2 one or two handles 11 are attached, which allow a user to guide the hammer drill 1 .
  • the pneumatic impact mechanism 4 shown by way of example has a percussion piston 12, which is excited by an excited air spring 13 to move forward, ie in the direction of impact 9, along the axis 8 .
  • the percussion piston 12 strikes an anvil 20 and thereby releases a portion of its kinetic energy to the striker 20 . Due to the recoil and excited by the air spring 13 , the percussion piston 12 moves after behind, ie against the direction of impact 9 until the compressed air spring 13, the percussion piston 12 drives back to the front.
  • the air spring 13 is formed by a pneumatic chamber which is closed axially, forward by a rear end face 21 of the percussion piston 12 and axially, to the rear by an excitation piston 22 .
  • the pneumatic chamber can be circumferentially closed by a hammer tube 23 , in which the percussion piston 12 and the exciter piston 22 are guided along the axis 8 .
  • the percussion piston 12 can slide in a cup-shaped excitation piston, wherein the excitation piston closes the cavity of the pneumatic chamber in the radial direction, ie circumferentially.
  • the air spring 13 is energized by a forced, oscillating movement along the axis 8 of the exciter piston 22 .
  • An eccentric 24, a wobble drive, etc. can convert the rotational movement of the motor 3 in the linear oscillating motion.
  • a period of forced movement of the exciter piston 22 is tuned to the interaction of the system of percussion piston 12, air spring 13 and striker 20 and their relative axial distances, in particular a predetermined impact point 25 of the percussion piston 12 with the striker 20 to the system resonant and thus optimal for an energy transfer from the motor 3 to the percussion piston 12 to stimulate.
  • the striker 20 is a body, preferably a body of revolution, with a front impact surface 26 exposed in the direction of impact 9 and a rear impact surface 27 exposed against the direction of impact 9. Impact on its rear impact surface 27 is transmitted to the striker 20 on its front striking surface 26 adjacent tool 7.
  • the striker 20 may be referred to its function as an intermediate beater.
  • a guide 28 guides the striker 20 along the axis 8.
  • the striker 20 partially dives with a rear end into a rear guide section 29 .
  • the rear end rests with its radial outer surface on the guide portion 29 in the radial direction.
  • a front guide portion 30 may equally surround a front end of the striker 20 and restrict its radial movement.
  • the rear and the front guide portion 29, 30 form with their axially aligned surfaces at the same time two stops which limit an axial movement of the striker 20 on a distance between the rear stop 29 and the front, lying in the direction of impact 9 stop (striker) 30 .
  • the striker 20 has a thickened central portion 33, which abuts with its end faces on the axial surfaces of the guide portions 29, 30 .
  • the example shown guide 28 has a, for example, cylindrical, circumferentially closed guide tube 31, in which the Anvil 20.
  • the thicker portion 33 of the striker 20 is radially spaced with its lateral surface 34, ie radial outer surface, at least in sections or along its entire circumference by an inner wall 32 of the guide tube 31 .
  • Over the entire axial length of the central thickened portion 33 extends a groove-shaped or cylindrical gap 35 between the striker 20 and the guide tube 31.
  • the gap 35 may for example have a radial dimension of between 0.5 mm and 4 mm.
  • the tool 7 When chiselling, the tool 7 is supported on the front striking surface 26 of the striker 20 , whereby the striker 20 is held in engagement with the rear stop 29 ( Fig. 2 ).
  • the impact mechanism 4 is designed for the engaged position of the striker 20 .
  • the predetermined impact point 25 ( Fig. 2 ) of the percussion piston 12 and reversal point in the movement of the percussion piston 12 is determined by the rear impact surface 27 of the engaged striker 20 .
  • the beating function of the pneumatic percussion mechanism 4 should be interrupted, otherwise the hammer drill 1 hits empty.
  • An impact of the percussion piston 12 on the striker 20 causes the striker 20 to slide to the front stop 30 and preferably stops in its vicinity.
  • the percussion piston 12 can move beyond the predetermined impact point 25 to the front, in the direction of impact 9 up to the preferably damping stop 30 .
  • the effect of the air spring 13 is reduced or canceled, which is why the percussion piston 12 stops due to the weakened or lacking coupling to the excitation piston 22 .
  • the impact mechanism 4 is activated again when the striker 20 is engaged to the rear stop 29 and the percussion piston 12, the vent opening 36 closes.
  • the striker 20 remains lying 30 for an empty blow preferably in the vicinity of the front stopper, the anvil 20 can move substantially unrestrained in the impact direction 9 to the front stop 30, but the movement is in the opposite direction toward the rear stop 29 against a spring force at least one air spring 40.
  • the spring force of the air spring 40 is controlled in dependence on the direction of movement of the striker 20, based on the guide 28 .
  • An at least partially radially extending surface of the striker 20 and an at least partially radially extending surface of the guide 28 form inner surfaces of the pneumatic chamber 40 for the air spring, which are oriented perpendicular or inclined to the axis 8 .
  • An axial distance of the two radially extending surfaces changes with the movement of the striker 20 and thus the volume of the pneumatic chamber 40. The volume change causes a change in the pressure within the pneumatic chamber 40.
  • a rear bounce surface 41 of the thicker section 33 facing the direction of impact 9 can form the first radially extending inner surface of the pneumatic chamber 40 .
  • a rear bounce surface 42 of the guide 28, which points in the direction of impact 9 and defines the rear stop 29 with the rear bounce surface 41 of the thicker section 33, may be the second radially extending inner surface of the pneumatic chamber 40 .
  • the pneumatic chamber 40 is closed on one side by the guide 28 and on the other side by the striker 22 .
  • a hermetic, airtight seal between the striker 20 and the guide 28 is effected by a first sealing element 43 and a second sealing element 44.
  • the sealing elements 43, 44 are arranged offset from one another along the axis 8 .
  • the first sealing element 43 is arranged, for example, between the two stops 29, 30, the second sealing element 44 axially outside the two stops 29, 30, that is, the respective bouncing surfaces 42 .
  • Between the two sealing elements 43, 44 are the radially extending inner surfaces of the pneumatic chamber 40.
  • the sealing elements 43, 44 are arranged on portions of the striker 20 of different cross section, whereby the distance of the sealing elements 43, 44 to the axis of the eighth is different in size. In other embodiments, at least portions of the sealing elements 43, 44 are at different distances from the axis 8. In a projection on a plane perpendicular to the axis 8 , the two seals do not overlap, or at least in sections, not.
  • the dependence of the air spring 40 on the direction of movement of the striker 20 is achieved in that at least one of the sealing elements 43, 44 is designed as a valve 100.
  • An air duct 45 binds the pneumatic chamber 40 to an air reservoir in the environment, eg the machine housing 2 .
  • the valve 100 is arranged, which controls an air flow through the channel 45 .
  • the control takes place in dependence on the movement of the striker 20.
  • the valve 100 opens and air can flow from the reservoir through the channel 45 into the increasing volume of the pneumatic chamber 40 ; the air spring is thereby deactivated.
  • the valve 100 locks the channel 45 when the striker 20 against the Direction of impact 9 moves.
  • the pressure in the pneumatic chamber 40 increases with the decreasing volume of the pneumatic chamber 40 , whereby the air spring 40 counteracts the movement of the striker 20 .
  • the valve 100 is an automatic or self-medium actuated valve 100, eg a check valve or a throttle check valve.
  • the valve 100 is actuated by an air flow which flows into the valve 100 .
  • the air flow is a result of a pressure difference between the pneumatic chamber 40 and via the valve 100 associated with their space 51.
  • the bonded area 51 can be a very large air reservoir, for example, the environment, the interior of the machine housing 51, or other finished, pneumatic chamber with limited volume.
  • FIG. 3 and FIG. 5 show in longitudinal section through the percussion an exemplary embodiment of the valve 100 in the closed w. open position.
  • Cross sections through the closed valve 100 in the plane IV-IV and the open valve 100 in the plane VI-VI are in 4 and FIG. 6 shown.
  • Fig. 7 shows an enlarged partial section of the valve 100th
  • a lip seal 101 spans the central portion 33 of the striker 20.
  • the lip seal 101 has a tubular, cylindrical attachment portion 103, with which the lip seal 101 is attached to the striker 20 .
  • the attachment portion 103 may be inserted, for example, on the groove bottom 88 in an annular groove 106 in the middle portion 33 .
  • the attachment portion can clamp 103 on the striker 20, glued or otherwise secured such as to suppress slipping of the lip seal 101 along the axis. 8
  • a lip 102 of the lip seal 101 is inclined relative to the axis 8 and a radial distance to the mounting portion 103 increases toward the pneumatic chamber 40.
  • the contour of the lip 102 may, for example, partially hollow cone-shaped with a direction towards the pneumatic chamber 40 opening cone his.
  • the lip 102 and the mounting portion 103 surrounding a bag-like cavity 104 which is closed open in the direction to the pneumatic chamber 40 and in the direction away from the pneumatic chamber 40th
  • the bag-like cavity 104 opens against the direction of impact 9.
  • In a section long to the axis 8 of the lip seal 101 has a V-shaped or U-shaped profile.
  • the lip 102 is pivotable relative to the attachment portion 103 so that a radial dimension 110 of the lip seal 101 is variable.
  • the radial dimension 110 may, for example, be the difference between the outside diameter and the inside diameter of the lip sealing ring 101 .
  • the lip seal 101 can be in an unfolded position (FIG. Fig. 4 ) occupy, in which the lip 102 is pivoted in the greatest possible distance from the attachment portion 103 .
  • An end face of the lip sealing ring 101 which is oriented perpendicular to the axis 8, for example, corresponds to the cross-sectional area of the gap 35.
  • the lip 102 contacts with a contact portion 113, the guide tube 31.
  • the lip seal ring 101 may be from the extended position to a collapsed Position ( Fig. 6 ) are pivoted. The end face of the lip seal 101 is thereby reduced from the end face of the unfolded lip seal 101 , which reduces the radial dimension 101b . The contact portion 113 comes off the guide tube 31.
  • the lip seal 101 forms the sealing element of the valve 100. With a lip seal 101 unfolded, the valve 100 is in a closed / throttled and with a collapsed lip seal 101 , the valve 100 is in an open position. The change of the lip seal 101 between the folded and unfolded position is effected by the pressure ratio in the pneumatic chamber 40 and the flow direction in the gap 35 . A flow of air towards the rear pneumatic chamber 40 flows to a surface 114 of the lip 102 that is partially radial to the guide 28 . The inflowing air causes the lip 102 to pivot towards the attachment portion 103, and consequently, the lip seal 101 to collapse . The continuing air keeps the lip seal 101 in the folded position, leaving the valve 100 open.
  • an air flow from the rear, pneumatic chamber 40 flows into a surface 114 of the lip 102, which points away from the guide 28 partially radially.
  • the inflowing air thereby causes the lip 102 to pivot away from the attachment portion 103 toward the guide tube 31 .
  • the lip seal 101 goes into the unfolded position. In the unfolded position, the pivotable lip 102 abuts against a stop 119 with at least a portion of the surface 114 facing away from the pneumatic chamber 40 .
  • the stopper 119 is formed, for example, by the guide tube 31 against which the contact portion 113 abuts.
  • the valve 100 is closed and kept closed.
  • the lip 102 may be made of an elastic material, eg rubber.
  • a thickness of the lip 102 may be significantly less than its dimension along the axis 8 .
  • the relatively low thickness of the lip 102 allows the airflow into and / or out of the pneumatic chamber 40, the lip 102 is pivoted by bending.
  • the lip 102 is resiliently biased to the deployed position. In a basic position, the valve 100 is closed. In this embodiment, it is sufficient that the air flow into the pneumatic chamber 40 causes the bending.
  • the lip 102 and attachment portion 103 may be a one-piece, monolithic, or one-piece molded component of the same material, eg, rubber.
  • An area in which the pivotable lip 102 merges into the fixing portion 103 immovable with respect to the striker 20 may be farther from the pneumatic chamber 40 than the contact portion 113.
  • a solid state hinge 107 may connect the lip 102 to the attachment portion 103 .
  • the solid-state joint 107 has a smaller thickness than the lip 102, whereby a pivoting movement takes place mainly around the solid-state joint 107 .
  • the second sealing element 44 can be offset axially relative to the rear stop 29 , counter to the direction of impact 9 , and can be, for example, a sealing ring mounted in a stationary manner in the guide 28 .
  • the sealing ring 44 is inserted, for example, in the sleeve 29 and terminates flush with a rear end 75 of the striker 20 from.
  • the rear end 75 of the striker 20 has a smaller diameter than the middle portion 33.
  • Fig. 8 shows an embodiment in which the lip 102 is mounted rotatably mounted in a separate mounting portion 103 .
  • the attachment portion 103 has a bearing shell 116 into which a bearing head 117 of the lip 102 is inserted.
  • Fig. 9 shows a further embodiment of the valve 100.
  • a stop 118 On the side remote from the pneumatic chamber 40 side rises from the mounting portion 103 in the radial direction, a stop 118.
  • the lip 102 is located with a portion of its facing away from the pneumatic chamber 40 surface 114 on the stop 118th when the lip seal 101 is opened. In the folded position, the lip 102 is pivoted away from the stop or reference (dashed line).
  • the stop 118 on the striker 20 limits the pivotal movement of the lip 102.
  • the embodiment with the stop 118 is exemplified with a rotatably mounted lip 102 , may equally be used for a lip 102 that is flexible by a solid-state hinge 107 or over its length.
  • the sealing element 101 is anchored in the inner wall and the lip 102 touches the striker 20th
  • Fig. 10 shows in longitudinal section a further embodiment with a rear air spring 40, a front air spring 120 and at least the valve 100 for controlling the behavior of the striker 20.
  • a forward movement ie in the direction of impact 9 of the striker 20
  • the volume of the rear pneumatic chamber 40 is increased and reduces the volume of the front pneumatic chamber 120 .
  • the volume of air displaced in the front pneumatic chamber 120 may flow through the valve 100 into the rear pneumatic chamber 40 .
  • the volume of the front pneumatic chamber 120 increases and reduces the volume of the rear pneumatic chamber 40.
  • the spring force of the rear air spring 40 and the front air spring 120 is dependent on the direction of movement of the striker 20 controlled.
  • the valve 100 prevents air flow which would equalize the increased pressure in the rear pneumatic chamber 40 and the reduced pressure in the front pneumatic chamber 120 .
  • the backward movement therefore takes place against the spring force of the two air springs 40 and 120 and is braked.
  • the spring force of the air springs 40, 120 may be different, the pressure-loaded rear air spring 40 may exhibit a greater braking effect than the front air spring 120 .
  • the front pneumatic spring 120 of the front air spring has an at least partially radially extending front inner wall 131 formed by the guide 28 and an at least partially radially extending rear inner wall 132 formed by the striker 20 .
  • the rear pneumatic chamber 40 of the rear air spring has an at least partially radially extending front inner wall 41, which is formed by the striker 20 , and an at least partially radially extending, rear inner wall 42, which is formed by the guide 28 .
  • the pneumatic chambers 40, 120 are closed by the inner wall 32 of the cylindrical or prismatic guide tube 31 .
  • the pneumatic chambers 40, 120 are closed by the striker 20 .
  • a first sealing element 43 and a second sealing element 44 arranged to seal the rear pneumatic chamber 40 airtight.
  • the front and rear inner walls 41, 42 of the rear pneumatic chamber 40 are disposed along the axis 8 between the first seal member 43 and the second seal member 44 .
  • a third sealing element 133 is in the direction of impact 9 in front of the front inner wall 131 of the front arranged pneumatic chamber 120 .
  • the front and rear inner walls 131, 132 of the front pneumatic chamber 120 are located along the axis 8 within the first seal member 43 and the third seal member 133.
  • the coupled via the air duct 134 front and rear pneumatic chamber 40, 120 have a constant relative to the environment closed air volume, wherein a distribution of the air volume to the two chambers 40, 120 varies depending on the current position of the striker 20 .
  • Fig. 11 shows an embodiment with a stationary valve 180 in a pneumatic chamber 40 whose volume increases in movement of the striker 20 in the direction of impact 9 .
  • the construction of the valve 180 may correspond to the valve 100 .
  • a lip sealing ring 181 of the valve 180 is fastened in the guide 28 and inserted, for example, in an annular groove of a sleeve 29 inserted into the guide tube 31 .
  • An annular pivotable lip 182 is inclined relative to the axis 8 and extends toward the pneumatic chamber 40 from the guide 28.
  • the pivotable lip 182 may contact the striker 20 in a deployed position.
  • the pivotable lip 182 contacts the striker 20 at its smaller diameter end portion 76 .
  • the first sealing element 43 on the circumference of the central portion 33 may be a permanently sealing sealing element or a valve which is inserted, for example, in an annular groove 160 in the central portion.
  • the speed of the striker 20 in the direction of impact 9 is approximately in the range of 1 m / s to 10 m / s at a blank. Accordingly, the volume of the pneumatic chamber 40 increases rapidly . As a result of the opened valve 100 , air flows into the pneumatic chamber 40 at a high rate, so that a pressure equalization rapidly sets in.
  • the valve 50 releases in its open position a flow-through surface (hydraulic surface) which is at least 1/30, preferably at least 1/20, or at least 10% of the annular, effective cross-sectional area of the volume of the pneumatic chamber 40 .
  • the hydraulic surface is defined perpendicular to the flow direction in the valve 50 .
  • the effective cross-sectional area is the differential of the volume after the direction of movement, ie the change in volume is determined by the product of the effective cross-sectional area and the longitudinal displacement of the striker 20.
  • the valve 100 closes and the compression of the closed pneumatic chamber 40 brakes the striker 20.
  • the throttle opening 54 leaves only a small air flow, whereby the overpressure in the pneumatic chamber 40 is maintained.
  • the throttle opening 54 may be, for example, a bore through the wall of the guide tube 31 .
  • the area of a flow cross-section (hydraulic cross-section) of the throttle opening 54 is at least two orders of magnitude smaller than the annular cross-sectional area of the pneumatic chamber 40, eg less than 0.5 percent.
  • the throttle opening 54 is greater than 1/2000 or 1/1500 of the annular cross-sectional area to allow manual insertion of the striker 20 .
  • the flow cross-section or the cross-sectional area of the throttle opening 54 is determined at its narrowest point perpendicular to the flow direction.
  • the volume of the pneumatic chamber 40 changes in proportion to the velocity of the striker 20 and to the annular cross-sectional area of the volume enclosed by the pneumatic chamber 40 . If the throttle 54 to compensate for the change in volume without pressure change, the displaced air must pass through the throttle 20 at least one hundred times the speed of the striker.
  • the flow properties of air set the flow velocity an upper limit, which is why a pressure equalization is possible with a slow but not a fast moving striker 20 .
  • the valve 100 may be designed as a throttle valve which leaves a corresponding throttle opening open in a closed / throttling position.
  • the lip seal 101 may have axially extending bores 200 from a side facing the pneumatic chamber 40 to a side facing away from the pneumatic chamber 40 .
  • the diameter of the axial bores may, for example, have a cross section whose area is at least two orders of magnitude smaller than in the area of the flow cross section (hydraulic cross section) of the opened valve 100 , for example less than 0.5% and, for example, greater than 0.05%.
  • a throttle can also be made possible by a lip 102 which is not completely flush with the guide 31 .
  • the lip may have notches 201 at its contacting portion 113 .
  • a flow cross section of the throttle between the notch 201 and the guide 31 is within the above specified limits of at most 1/100, eg smaller 1/300 of the effective cross-sectional area, ie, in the illustrated example, the annular cross-sectional area of the volume of the pneumatic chamber 40.
  • channels for the restrictor may be introduced along the attachment portion 103 by grooves in the attachment portion 103 or groove bottom 106 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Actuator (AREA)
EP11164399.5A 2010-06-10 2011-05-02 Handwerkzeugmaschine mit pneumatischem Schlagwerk Active EP2394794B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE201010029917 DE102010029917A1 (de) 2010-06-10 2010-06-10 Werkzeugmaschine

Publications (2)

Publication Number Publication Date
EP2394794A1 EP2394794A1 (de) 2011-12-14
EP2394794B1 true EP2394794B1 (de) 2019-04-03

Family

ID=44509849

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11164399.5A Active EP2394794B1 (de) 2010-06-10 2011-05-02 Handwerkzeugmaschine mit pneumatischem Schlagwerk

Country Status (4)

Country Link
US (1) US9050713B2 (zh)
EP (1) EP2394794B1 (zh)
CN (1) CN102310391B (zh)
DE (1) DE102010029917A1 (zh)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012206451B4 (de) * 2012-04-19 2020-12-10 Hilti Aktiengesellschaft Handwerkzeugmaschine
DE102012210088A1 (de) * 2012-06-15 2013-12-19 Hilti Aktiengesellschaft Werkzeugmaschine
US9308635B2 (en) * 2013-01-28 2016-04-12 Caterpillar Inc. Variable volume accumulator
EP2857150A1 (de) * 2013-10-03 2015-04-08 HILTI Aktiengesellschaft Handwerkzeugmaschine
WO2015061370A1 (en) 2013-10-21 2015-04-30 Milwaukee Electric Tool Corporation Adapter for power tool devices
EP3117962A1 (de) * 2015-07-17 2017-01-18 HILTI Aktiengesellschaft Handwerkzeugmaschine
EP3181300A1 (de) * 2015-12-15 2017-06-21 HILTI Aktiengesellschaft Schlagende handwerkzeugmaschine
EP3231560A1 (de) * 2016-04-13 2017-10-18 HILTI Aktiengesellschaft Handwerkzeugmaschine
US10814468B2 (en) 2017-10-20 2020-10-27 Milwaukee Electric Tool Corporation Percussion tool
CN108120628B (zh) * 2018-01-25 2024-07-23 中国商用飞机有限责任公司北京民用飞机技术研究中心 一种冲击损伤预制装置
US11059155B2 (en) 2018-01-26 2021-07-13 Milwaukee Electric Tool Corporation Percussion tool
CA3133954A1 (en) * 2019-01-17 2020-07-23 Donald W. Carlson Multi-stroke powered safety hammer system
EP3822036A1 (de) * 2019-11-12 2021-05-19 Hilti Aktiengesellschaft Schlagwerksanordnung

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009036526A1 (en) * 2007-09-21 2009-03-26 Sparky Eltos Ad Impact mechanism for electrical hammer drills

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3067584A (en) 1962-02-15 1962-12-11 Black & Decker Mfg Co Sealing ring means for reciprocating piston used in power-operated percussive tool
DE7408480U (de) 1973-03-19 1974-06-06 The Black And Decker Manufacturing Co Leerlaufvorrichtung für Aufreißhämmer
SE398066B (sv) 1975-03-18 1977-12-05 Atlas Copco Ab Sett och anordning vid slaende bearbetning for dempning av rekylen fran ett arbetsverktyg
SE416901C (sv) * 1979-03-30 1985-09-23 Atlas Copco Ab Pneumatisk slagmekanism
GB2084917A (en) 1980-10-08 1982-04-21 Kango Electric Hammers Ltd Improvements in or relating to percussive tools
US4442906A (en) * 1980-11-18 1984-04-17 Black & Decker Inc. Percussive drills
CH664730A5 (de) 1983-07-21 1988-03-31 Sig Schweiz Industrieges Verfahren und vorrichtung zur daempfung des rueckpralles bei schlagwerkzeugen.
DE3826213A1 (de) * 1988-08-02 1990-02-15 Bosch Gmbh Robert Bohr- oder schlaghammer
DE9213373U1 (de) * 1992-10-05 1994-02-10 Martin Merkel GmbH & Co KG, 21107 Hamburg Wellendichtring mit einer Dichtlippe
DE4400779A1 (de) * 1994-01-13 1995-07-20 Duss Maschf Elektropneumatischer Schlag- oder Drehschlaghammer
JP3292969B2 (ja) * 1995-08-18 2002-06-17 株式会社マキタ ハンマードリル
GB9902793D0 (en) * 1999-02-09 1999-03-31 Black & Decker Inc Rotary hammer
GB9902789D0 (en) * 1999-02-09 1999-03-31 Black & Decker Inc Rotary hammer
FR2853038B1 (fr) * 2003-03-24 2005-07-01 Freudenberg Garniture d'etancheite et de realimentation
DE102007000135A1 (de) * 2007-03-08 2008-09-11 Hilti Ag Handwerkzeugmaschine mit pneumatischem Schlagwerk
DE102008000727A1 (de) * 2008-03-18 2009-09-24 Robert Bosch Gmbh Tragbare Werkzeugmaschine, insbesondere Bohr- oder Schlaghammer, mit einer Schlägerfangeinrichtung und/oder Schlägerdämpfungseinrichtung

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009036526A1 (en) * 2007-09-21 2009-03-26 Sparky Eltos Ad Impact mechanism for electrical hammer drills

Also Published As

Publication number Publication date
DE102010029917A1 (de) 2011-12-15
US9050713B2 (en) 2015-06-09
CN102310391A (zh) 2012-01-11
CN102310391B (zh) 2015-09-09
EP2394794A1 (de) 2011-12-14
US20110303431A1 (en) 2011-12-15

Similar Documents

Publication Publication Date Title
EP2394794B1 (de) Handwerkzeugmaschine mit pneumatischem Schlagwerk
EP2394793B1 (de) Handwerkzeugmaschine mit pneumatischem Schlagwerk und Steuerungsverfahren dafür
EP2394795B1 (de) Werkzeugmaschine
EP1893388B1 (de) Bohr- und/ oder schlaghammer mit leerlaufsteuerung
EP3389933B1 (de) Schlagende handwerkzeugmaschine
DE102009026542A1 (de) Werkzeugmaschine
EP1648663B1 (de) Hohlkolbenschlagwerk mit luftausgleichs- und leerlauföffnung
DE69910572T2 (de) Im-loch schlagbohrhammer und darin verwendeter kolben
EP3068585B1 (de) Handwerkzeugmaschine
EP3389932B1 (de) Schlagende handwerkzeugmaschine
EP0663270B1 (de) Schlag- oder Drehschlaghammer
EP1697090B1 (de) Schlagwerk für eine repetierend schlagende handwerkzeugmaschine
EP1261459A2 (de) Luftfederschlagwerk mit hohlem schlagkolben
WO2017102418A1 (de) Schlagende werkzeugmaschine
EP3389934B1 (de) Schlagende handwerkzeugmaschine
EP1355764A1 (de) Luftfederschlagwerk mit kurz bauendem antriebskolben
DE19847687C2 (de) Hohlkolben-Schlagwerk mit Hülsensteuerung
CH696633A5 (de) Luftpolsterschlagwerk.
EP2564985B1 (de) Luftpolster-Schlagwerk für einen motorisch angetriebenen Bohr- oder Schlaghammer
DE3316013A1 (de) Bohrhammer mit einem pneumatischen betaetigten schlagkoerper
DE3634282A1 (de) Motorisch betriebener bohrhammer
DE2714921B2 (de) Ramme zum Ermitteln von Bodeneigenschaften und zur Bodenprobenentnahme

Legal Events

Date Code Title Description
AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20120614

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

17Q First examination report despatched

Effective date: 20181004

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20181221

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

Ref country code: AT

Ref legal event code: REF

Ref document number: 1115147

Country of ref document: AT

Kind code of ref document: T

Effective date: 20190415

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502011015549

Country of ref document: DE

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20190403

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190403

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190403

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190403

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190403

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190803

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190703

Ref country code: AL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190403

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190403

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190403

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190403

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190703

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190403

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190403

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190704

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190403

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190803

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502011015549

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190403

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190403

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190403

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190403

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190403

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20190531

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190403

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190502

26N No opposition filed

Effective date: 20200106

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190403

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190502

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190403

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190531

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 1115147

Country of ref document: AT

Kind code of ref document: T

Effective date: 20190502

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190502

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190403

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO

Effective date: 20110502

Ref country code: MT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190403

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190403

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20230526

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20240521

Year of fee payment: 14

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20240521

Year of fee payment: 14

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20240602

Year of fee payment: 14

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20240529

Year of fee payment: 14