EP3212362A1 - Schlagvorrichtung - Google Patents

Schlagvorrichtung

Info

Publication number
EP3212362A1
EP3212362A1 EP15804871.0A EP15804871A EP3212362A1 EP 3212362 A1 EP3212362 A1 EP 3212362A1 EP 15804871 A EP15804871 A EP 15804871A EP 3212362 A1 EP3212362 A1 EP 3212362A1
Authority
EP
European Patent Office
Prior art keywords
control
chamber
cylinder
piston
slide
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
EP15804871.0A
Other languages
English (en)
French (fr)
Other versions
EP3212362B1 (de
Inventor
Jean-Sylvain Comarmond
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.)
Montabert SAS
Original Assignee
Montabert SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Montabert SAS filed Critical Montabert SAS
Publication of EP3212362A1 publication Critical patent/EP3212362A1/de
Application granted granted Critical
Publication of EP3212362B1 publication Critical patent/EP3212362B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D9/00—Portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
    • B25D9/14—Control devices for the reciprocating piston
    • B25D9/145—Control devices for the reciprocating piston for hydraulically actuated hammers having an accumulator
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D9/00—Portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
    • B25D9/14—Control devices for the reciprocating piston
    • B25D9/16—Valve arrangements therefor
    • B25D9/18—Valve arrangements therefor involving a piston-type slide valve
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D9/00—Portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
    • B25D9/14—Control devices for the reciprocating piston
    • B25D9/16—Valve arrangements therefor
    • B25D9/20—Valve arrangements therefor involving a tubular-type slide valve
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D9/00—Portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
    • B25D9/14—Control devices for the reciprocating piston
    • B25D9/26—Control devices for adjusting the stroke of the piston or the force or frequency of impact thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2209/00—Details of portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
    • B25D2209/007—Details of portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously having a tubular-slide valve, which is not coaxial with the piston

Definitions

  • the present invention relates to a percussion apparatus, and more particularly to a hydraulic percussion apparatus.
  • the document FR2595972 discloses a percussion apparatus, comprising:
  • a striking piston mounted alternately movable inside the piston cylinder, and arranged to strike a tool during each cycle of operation of the percussion apparatus
  • control distributor arranged to control an alternating movement of the striking piston inside the piston cylinder alternately according to a striking stroke and a return stroke
  • control device arranged to vary the strike stroke of the striking piston as a function of the hardness of the terrain encountered by the tool, the control device comprising:
  • each control channel also opening into the piston cylinder and being able to be placed in communication with a high pressure fluid supply circuit for at least a portion of the reciprocating movement of the striking piston
  • control channel connected to the control valve and opening into the control cylinder
  • control spool movably mounted in the control cylinder between a plurality of pilot positions in each of which the control spool is configured to fluidically connect the control channel with at least one of the control channels
  • the control device further comprises a flow control member, formed by a positive displacement pump, actuated in synchronism with the striking piston.
  • the flow control member is shaped to ensure the admission, at each operating cycle of the percussion apparatus, a predetermined amount of fluid in the first control chamber.
  • the control device also comprises a discharge channel opening respectively into the piston cylinder and into the first control chamber, the evacuation channel being configured to be placed in communication with the low-pressure return circuit, via a peripheral groove. provided on the striking piston and a connecting channel permanently connected to the low pressure return circuit and opening into the piston cylinder, when the striking piston is in and / or near a theoretical striking position.
  • the evacuation channel is configured to evacuate, at each operating cycle of the percussion apparatus, a quantity of fluid from the first control chamber which depends on the residence time of the striking piston in and / or near its theoretical strike position and therefore the hardness of the terrain encountered by the tool.
  • a disadvantage of such a percussion apparatus lies in the complexity of the realization of the volumetric pump. Indeed, such a volumetric pump requires the realization of rectified bores and drawers, implanted in one or more heavy and expensive parts.
  • the present invention aims to remedy these disadvantages.
  • the technical problem underlying the invention therefore consists in providing a percussion apparatus comprising a simple and economical structure control device, while at the same time making it possible to automatically adapt the length of the strike stroke of the striking piston as a function of the hardness of the ground in which the percussions are generated.
  • the present invention relates to a percussion apparatus, comprising:
  • a striking piston mounted alternately movable inside the piston cylinder, and arranged to strike a tool during each cycle of operation of the percussion apparatus, a control distributor arranged to control an alternating movement of the striking piston inside the piston cylinder alternately according to a striking stroke and a return stroke,
  • control device arranged to vary the strike stroke of the striking piston as a function of the hardness of the terrain encountered by the tool, the control device comprising:
  • each control channel also opening into the piston cylinder and being able to be placed in communication with a high pressure fluid supply circuit for at least a portion of the reciprocating movement of the striking piston
  • control channel connected to the control valve and opening into the control cylinder
  • control spool movably mounted in the control cylinder between a plurality of pilot positions in each of which the control spool is configured to fluidically connect the control channel with at least one of the control channels
  • a second pilot chamber delimited by the control spool and the control cylinder, a second face of the control spool, opposite the first face, being located in the second pilot chamber,
  • control spool defines a receiving housing
  • control device further comprises an adjusting spool mounted in the receiving housing, the control spool and the adjusting spool delimiting a first control chamber permanently fluidically connected to the control channel and a second control chamber permanently fluidly connected to the high-pressure fluid supply circuit
  • the adjustment slide is movably mounted in the receiving housing between a first position in which the adjustment slide is configured to fluidly connect the first control chamber and the second control chamber and a second position in which the control slide is configured to fluidly isolate the first control chamber and the second control chamber
  • the control device being configured from so that the adjustment drawer is moved to its first po when the control channel is fluidly connected to the high pressure fluid supply circuit via at least one of the control channels.
  • the adjustment slide is configured to feed, at each cycle of operation of the percussion apparatus, the first control chamber with a predetermined quantity of high pressure fluid, and without the need for the presence of a regulating device. complex flow, such as a positive displacement pump.
  • the control device is configured such that the control slide is operated synchronously with the control valve.
  • the adjustment spool is configured to operate at the same frequency as the striking piston.
  • the percussion apparatus may further have one or more of the following features, taken alone or in combination.
  • control spool and the control spool define a second control chamber permanently fluidly connected to the high-pressure fluid supply circuit, the adjustment spool being configured to fluidically isolate the first pilot chamber and the second adjustment chamber when the adjusting spool is in its second position, and for fluidically connecting the first control chamber and the second adjustment chamber when the adjustment spool is in its first position.
  • the adjustment slide is slidably mounted in the receiving housing.
  • the adjustment slide comprises an end face located in the first adjustment chamber.
  • control cylinder and the control spool define an annular outer chamber permanently connected to the high pressure fluid supply circuit, the control spool comprising a connecting passage configured to connect fluidically. the annular outer chamber and the second adjustment chamber.
  • each of the control channels has a first end opening into the piston cylinder and a second end opening into the pilot cylinder, the first ends of the control channels being offset in the direction of the piston. extension of the striking piston, and the second ends of the control channels being offset in the direction of extension of the control spool.
  • the control device is configured such that the adjustment slide is moved to its second position when the control channel is fluidly isolated from the high-pressure fluid supply circuit.
  • the adjustment slide comprises a supply passage fluidly connected to the first control chamber, the control slide being configured so that the feed passage is fluidly isolated from the second adjusting chamber when the adjusting spool is in its second position, and so that the supply passage is fluidly connected to the second adjusting chamber when the adjusting spool is in its first position.
  • control channel also opens into the piston cylinder, and is configured to be placed in communication with a low pressure return circuit during at least a portion of the reciprocating movement of the striking piston.
  • control device is configured such that the adjustment slide is moved to its second position when the control channel is fluidly connected to the low pressure return circuit.
  • control channel is configured to be placed in communication with the low-pressure return circuit during at least part of the strike stroke of the striking piston or when the striking piston is in position. and / or near a theoretical strike position.
  • the percussion apparatus comprises a connecting channel permanently connected to the low-pressure return circuit and opening into the piston cylinder, the striking piston comprising a peripheral groove configured to fluidly connect said connecting channel and the control channel during at least part of the strike stroke of the striking piston, for example at the end of the striking stroke, or when the striking piston is in and / or near a position theoretical strike.
  • control spool comprises a peripheral control groove, the peripheral control groove and the control cylinder defining an annular connection chamber in which the control channel opens, the annular connection chamber. being configured to fluidically connect the control channel with at least one of the control channels according to the driving position occupied by the control spool.
  • control spool comprises a connection orifice configured to fluidly connect the annular connection chamber and the first adjustment chamber.
  • the connecting orifice opens respectively into the first adjustment chamber and into the bottom of the peripheral control groove.
  • each control channel is adapted to be placed in communication with the high-pressure fluid supply circuit during at least part of the return stroke of the striking piston.
  • control device comprises a discharge channel opening respectively into the piston cylinder and into the first control chamber, the evacuation channel being configured to be put in communication with the circuit low pressure return when the striking piston is in and / or near a theoretical striking position.
  • the evacuation channel is configured to evacuate, at each operating cycle of the percussion apparatus, a quantity of fluid outside the first control chamber.
  • the percussion apparatus comprises a connecting channel permanently connected to the low-pressure return circuit and opening into the piston cylinder, the striking piston comprising a peripheral groove configured to fluidically connect the connecting channel and the evacuation channel when the striking piston is in and / or near a theoretical striking position.
  • the evacuation channel is provided with a calibrated orifice.
  • the striking piston and the piston cylinder defines a first control chamber permanently connected to the high-pressure fluid supply circuit and a second control chamber, the control distributor being configured. for placing the second control chamber alternately with the high pressure fluid supply circuit and the low pressure return circuit.
  • each control channel is configured to be placed in communication with the first control chamber during at least part of the reciprocating movement of the striking piston, and for example during at least a portion of the return stroke of the striking piston.
  • the second pilot chamber is permanently connected to the low pressure return circuit.
  • control device comprises a connecting channel permanently connected to the low pressure return circuit and opening into the second control chamber.
  • control spool comprises a retaining member configured to retain the adjustment spool in the receiving housing.
  • the retaining member delimits at least part of the first control chamber and is configured to limit the displacement stroke of the adjustment slide towards the first control chamber.
  • the adjustment slide comprises a tubular portion delimiting at least in part the feed passage, the retaining member extending around the tubular portion.
  • the retaining member comprises an abutment surface against which is able to bear the adjustment spool in its first position.
  • control channel is connected to a control chamber of the control valve.
  • Figure 1 is a schematic longitudinal sectional view of a percussion apparatus according to the invention.
  • Figures 2 and 3 are longitudinal sectional views of a driving device of the percussion apparatus of Figure 1 in two different operating positions.
  • the percussion apparatus 2 shown in FIGS. 1 to 3 comprises a body 3 delimiting a piston cylinder 4, and a stepped striking piston 5 mounted alternately sliding inside the piston cylinder 4.
  • the striking piston 5 is intended to strike against the upper end of a tool 6 slidably mounted in a bore 7 formed in the body 3 coaxially with the piston cylinder 4.
  • the striking piston 5 and the piston cylinder 4 define a first annular control chamber 8, called a lower chamber, and a second chamber 9, said upper chamber, of larger section disposed above the striking piston 5.
  • the percussion apparatus 2 further comprises a control valve 11 arranged to control reciprocating movement of the striking piston 5 within the piston cylinder 4 alternately in a striking stroke and a return stroke.
  • the control distributor 11 is configured to put the second control chamber 9, alternatively in connection with a high pressure fluid supply circuit 12 during the strike stroke of the striking piston 5, and with a low pressure return circuit 13 during the return stroke of the striking piston 5.
  • the control distributor 11 is more particularly mounted mobile in a bore formed in the body 3 between a first position (see FIG. 1) in which the control distributor 11 is configured to put the second control chamber 9 in relation with the circuit. low pressure return valve 13 and a second position in which the control valve 11 is configured to put the second control chamber 9 in relation with the high pressure fluid supply circuit 12.
  • the first control chamber 8 is permanently supplied with high pressure fluid by a connecting channel 14, so that each position of the control valve 11 causes the striking stroke of the striking piston 5, then the return stroke of the 5.
  • the connecting channel 14 may advantageously be connected to an accumulator.
  • the percussion apparatus 2 also comprises a control device 15 arranged to vary the striking stroke of the striking piston 5 between a short striking stroke and a long striking stroke and vice versa, depending on the hardness of the ground encountered by the tool 6.
  • the control device 15 comprises a control slide 16 mounted in a control cylinder 17 formed in the body 3.
  • the control cylinder 17 is stepped, and comprises a first portion 17a, and a second portion 17b having a section greater than that of the first part 17a.
  • the control device 15 furthermore comprises a plurality of control channels 18a, 18b, 18c arranged to drive different stroke lengths.
  • Each pilot channel 18a, 18b, 18c opens respectively into the control cylinder 17 and into the piston cylinder 4.
  • the ends of the control channels 18a, 18b, 18c opening into the piston cylinder 4 are offset in the direction of extension of the striking piston 5, while the ends of the channels of 18a, 18b, 18c opening into the control cylinder 17 are shifted in the direction of extension of the control spool 16.
  • the control device 15 may for example comprise four control channels and therefore allow the setting of four different stroke lengths.
  • the control device 15 could comprise less than four or more control channels.
  • the control device 15 could for example include three control channels.
  • Each control channel 18a, 18b, 18c is able to be put in communication with the first control chamber 8, and therefore with the high-pressure fluid supply circuit 12, during at least a portion of the return stroke of the piston. 5.
  • the control device 15 also comprises a control channel 19 fluidly connected to a control chamber 21 of the control distributor 11.
  • the control channel 19 opens on the one hand into the control cylinder 17 and on the other hand into the cylinder piston 4.
  • the control spool 16 is slidably mounted in the control cylinder 17 between a plurality of pilot positions in each of which the control spool 16 is configured to fluidically connect the control channel 19 with at least one of the control channels 18a. , 18b, 18c.
  • the control slide 16 comprises a peripheral control groove 22.
  • the peripheral control groove 22 and the control cylinder 17 define an annular connecting chamber 23 into which the control channel 19 opens.
  • the connection chamber 23 is more particularly configured to fluidically connect the control channel 19 with at least one of the control channels 18a, 18b, 18c as a function of the driving position occupied by the control slide 16.
  • the control channel 19 is configured to be placed in communication with the high-pressure fluid supply circuit 12, via at least one of the control channels 18a, 18b, 18c, during at least part of the return stroke of the striking piston.
  • the control channel 19 is also configured to be placed in communication with the low pressure return circuit 13 when the striking piston 5 is in and / or near a theoretical strike position.
  • the percussion apparatus 2 comprises a connecting channel 24 permanently connected to the low-pressure return circuit 13 and opening into the piston cylinder 4, and the striking piston 5 comprises a throat device 25 configured to fluidly connect the connecting channel 24 and the control channel 19 when the striking piston 5 is in and / or near a theoretical striking position.
  • the percussion apparatus 2 is configured such that the control distributor 11 is moved to its first position when the control chamber 21 and the control channel 19 are connected to the low pressure return circuit 13 and to its second position when the control chamber 21 and the control channel 19 are connected to the high pressure fluid supply circuit 12.
  • the control spool 16 and the control cylinder 17 define a first control chamber 26 in which is located a first face 16a of the control spool 16, and a second control chamber 27 in which is located a second face 16b of the spool of the spool. steering 16 opposite to the first face 16a.
  • the second pilot chamber 27 is permanently connected to the low pressure return circuit 13 via a connecting channel 28.
  • the control device 15 further comprises an evacuation channel 29 provided with a calibrated orifice 31.
  • the evacuation channel 29 opens respectively into the piston cylinder 4 and into the first control chamber 26, and is configured to be placed in communication with the low pressure return circuit 13 when the striking piston 5 is in and / or near its theoretical striking position.
  • the percussion apparatus 2 comprises a connecting channel 32 permanently connected to the low-pressure return circuit 13 and opening into the piston cylinder 4, and the striking piston 5 comprising a peripheral groove 33 configured to connect fluidically.
  • the end of the evacuation channel 29 opening into the piston cylinder 4 is configured to be closed by an external wall of the striking piston 5 when the latter is at a distance from its theoretical strike position.
  • the control device 15 also comprises an adjustment slide valve 34 slidably mounted in a longitudinal, and advantageously axial, reception housing 35 delimited by the control slide 16.
  • the control slide 16 and the adjustment slide 34 define a first chamber setting 36 permanently connected fluidically to the control channel 19 and in which is located an end face 34a of the adjusting spool 34.
  • the control spool 16 and the adjusting spool 34 further delimit a second control chamber 37 fluidly connected in permanence to the high-pressure fluid supply circuit 12.
  • the second adjustment chamber 37 is annular.
  • control spool 16 comprises a connecting orifice 38 configured to fluidly connect the connection chamber 23 and the first adjustment chamber 36.
  • the connection orifice 38 opens advantageously respectively in the first adjusting chamber 36 and in the bottom of the peripheral control groove 22.
  • the second portion 17b of the control cylinder 17 and the control spool 16 defines an annular outer chamber 39 permanently connected to the high pressure fluid supply circuit 12 by a connecting channel 41 and the control spool 16 comprises a connecting passage 42 configured to fluidically connect the annular outer chamber 39 and the second control chamber 37.
  • the connecting passage 42 comprises, for example, a first end opening into the second control chamber 37 and a second end opening into the annular outer chamber 39.
  • the outer chamber 39 being delimited by the second portion 17b of large section of the control cylinder 17, the force exerted by the high pressure fluid on the control slide 16 tends to move it in a direction of volume decrease of the first adjusting chamber 26.
  • the adjusting slide 34 further comprises a feed passage 43 fluidly connected to the first control chamber 26.
  • the feed passage 43 has a first end opening axially in the face of the end 34b of the adjusting spool 34 facing the first control chamber 26, and a second end opening radially in a side wall of the adjusting spool 34.
  • the adjustment slide 34 comprises a tubular portion 44 partially delimiting the feed passage 43
  • the control spool 16 comprises a retaining ring 45 extending around the tubular portion 44 and configured to retain the adjusting spool 34 in the receiving housing 35.
  • the retaining ring 45 is configured to limit the travel of the adjusting spool 34 to the first control chamber 26, and includes, for example, a stop 45a against which is able to bear the adjustment slide 34 in its first position.
  • the adjustment slide 34 is slidably mounted in the receiving housing 35 between a first position in which the feed passage 43 is fluidly connected to the second control chamber 37 (see Fig. 3), and a second position in which the supply passage 43 is fluidly isolated from the second control chamber 37 (see Fig. 2). In the second adjustment slide position 34, the second end of the feed passage 43 is closed by an inner wall of the control slide 16 partially delimiting the receiving housing 35.
  • the adjustment slide 34 is more particularly configured to be moved to its first position when the control channel 19 is fluidly connected to the high pressure fluid supply circuit 12 via at least one of the control channels 18a, 18b, 18c , and to be moved to its second position when the control channel 19 is fluidly connected to the low-pressure return circuit 13 via the peripheral groove 25 and the connecting channel 24.
  • the control spool 16 has a substantially stable position when the amount of fluid extracted per cycle from the first control chamber 26 through the exhaust channel 29 is equal to the amount of fluid injected per cycle into the first adjustment chamber 26 through the feed passage 43.
  • the residence time of the striking piston 5 in and / or near its theoretical strike position increases, as well as the duration of communication of the first chamber of adjustment 26 with the low-pressure return circuit 13 via the evacuation channel 29 and the peripheral groove 33.
  • the quantity of fluid extracted from the first adjustment chamber 26 becomes larger than the quantity of fluid injected by the first adjustment chamber 26 through the feed passage 43. This results in a displacement of the control spool 16 in a direction of reducing the volume of the first adjustment chamber 26 under the action of the supply pressure in the outer chamber 39, which results in an action on the control valve 11 which decreases the strike stroke of the striking piston 5.
  • the invention is not limited to the sole embodiment of this percussion apparatus, described above as an example, it encompasses all the variants.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Automation & Control Theory (AREA)
  • Percussive Tools And Related Accessories (AREA)
EP15804871.0A 2014-10-28 2015-10-16 Schlagvorrichtung Active EP3212362B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1460342A FR3027543B1 (fr) 2014-10-28 2014-10-28 Appareil a percussions
PCT/FR2015/052785 WO2016066922A1 (fr) 2014-10-28 2015-10-16 Appareil à percussions

Publications (2)

Publication Number Publication Date
EP3212362A1 true EP3212362A1 (de) 2017-09-06
EP3212362B1 EP3212362B1 (de) 2018-07-04

Family

ID=52273291

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15804871.0A Active EP3212362B1 (de) 2014-10-28 2015-10-16 Schlagvorrichtung

Country Status (7)

Country Link
US (1) US10569404B2 (de)
EP (1) EP3212362B1 (de)
KR (1) KR102375665B1 (de)
CN (1) CN107073694B (de)
ES (1) ES2689761T3 (de)
FR (1) FR3027543B1 (de)
WO (1) WO2016066922A1 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10562165B2 (en) * 2016-04-10 2020-02-18 Caterpillar Inc. Hydraulic hammer
WO2018043175A1 (ja) * 2016-08-31 2018-03-08 古河ロックドリル株式会社 液圧式打撃装置
FR3077752B1 (fr) * 2018-02-14 2020-01-31 Montabert Perforateur hydraulique roto-percutant pourvu d’une chambre de commande reliee en permanence a un accumulateur basse pression
FR3077753B1 (fr) * 2018-02-14 2020-01-31 Montabert Procede de reglage de la course de frappe d’un piston de frappe d’un appareil a percussions, et un appareil a percussions pour la mise en œuvre de ce procede
FR3134738A1 (fr) * 2022-04-20 2023-10-27 Montabert Appareil à percussions équipé d’un dispositif de régulation de pression

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE420057B (sv) * 1980-02-20 1981-09-14 Atlas Copco Ab Hydrauliskt slagverk med mojlighet att reglera slagenergin
FR2595972B2 (fr) * 1985-07-16 1989-10-20 Montabert Ets Appareil a percussions
FR2602448B1 (fr) * 1986-08-07 1988-10-21 Montabert Ets Procede de regulation des parametres de percussion du piston de frappe d'un appareil mu par un fluide incompressible sous pression, et appareil pour la mise en oeuvre de ce procede
FR2676953B1 (fr) * 1991-05-30 1993-08-20 Montabert Ets Appareil hydraulique a percussions.
FR2727891B1 (fr) * 1994-12-08 1997-01-24 Montabert Ets Procede et appareil pour la regulation de la course de frappe d'un appareil a percussion mu par un fluide incompressible sous pression
SE513325C2 (sv) * 1998-04-21 2000-08-28 Atlas Copco Rock Drills Ab Slagverk
FI114290B (fi) * 2003-02-21 2004-09-30 Sandvik Tamrock Oy Ohjausventtiili ja järjestely iskulaitteessa
SE528743C2 (sv) * 2005-06-22 2007-02-06 Atlas Copco Rock Drills Ab Slagverk för bergborrmaskin, förfarande för åstadkommande av en fram- och återgående slagkolvrörelse och bergborrmaskin
SE530524C2 (sv) * 2006-09-13 2008-07-01 Atlas Copco Rock Drills Ab Slagverk, bergborrmaskin inkluderande ett dylikt slagverk och förfarande för styrning av ett slagverk
US8739986B2 (en) * 2011-12-08 2014-06-03 Effizient, LLC Retail cart
FR2983760B1 (fr) * 2011-12-09 2014-08-15 Montabert Roger Procede de commutation de la course de frappe d'un piston de frappe d’un appareil a percussions

Also Published As

Publication number Publication date
US20170312901A1 (en) 2017-11-02
CN107073694A (zh) 2017-08-18
WO2016066922A1 (fr) 2016-05-06
KR20170075722A (ko) 2017-07-03
KR102375665B1 (ko) 2022-03-16
FR3027543A1 (fr) 2016-04-29
US10569404B2 (en) 2020-02-25
CN107073694B (zh) 2020-07-10
EP3212362B1 (de) 2018-07-04
ES2689761T3 (es) 2018-11-15
FR3027543B1 (fr) 2016-12-23

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