EP1117508B1 - Luftfederschlagwerk mit rückholluftfeder - Google Patents
Luftfederschlagwerk mit rückholluftfeder Download PDFInfo
- Publication number
- EP1117508B1 EP1117508B1 EP99944386A EP99944386A EP1117508B1 EP 1117508 B1 EP1117508 B1 EP 1117508B1 EP 99944386 A EP99944386 A EP 99944386A EP 99944386 A EP99944386 A EP 99944386A EP 1117508 B1 EP1117508 B1 EP 1117508B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- piston
- striking
- chamber
- drive
- striking mechanism
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
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Classifications
-
- 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
Definitions
- the invention relates to an air spring hammer mechanism, in which a drive piston and a percussion piston are axially movable in a percussion mechanism housing.
- Such striking mechanisms are usually used in rotary or impact hammers used, whereby two types of striking have proven themselves in practice to have.
- One type relates to a striking mechanism with a hollow, in the drive mechanism guided drive piston, in its cavity the percussion piston is guided while the other type has a percussion mechanism hollow percussion piston guided in the striking mechanism housing concerns, in the cavity of the drive piston is guided.
- Both types of drums common is that the drive piston z. B. via a crank mechanism is oscillating and is located between the drive piston and the percussion piston forms an air spring that drives the drive transmits the drive piston to the percussion piston and this into a Drive direction where it finally hits a tool, e.g. on one Chisel strikes and transfers its impact energy. Then the bounces Percussion piston back and it starts, supported by the drive piston, a new stroke movement.
- the invention has for its object to provide an air spring hammer mechanism, in which the recoil behavior of the percussion piston is improved.
- an air spring hammer mechanism with a striking mechanism housing; one axially in the striking mechanism housing and drivable drive piston; one, seen in one direction, arranged in front of a drive surface of the drive piston, coaxial to the Drive piston axially movable percussion piston; one in front of the drive surface of the drive piston and arranged behind a rear surface of the percussion piston first chamber; one behind the drive surface of the drive piston trained second chamber; and with one in front of the back surface of the Percussion piston trained third chamber; the second chamber and the third chamber via a connecting channel in communicating connection are feasible.
- Air spring applies its energy to the percussion piston and thus indirectly the tool can pass on.
- Air spring applies its energy to the percussion piston and thus indirectly the tool can pass on.
- the drive piston moves back builds up in the second chamber behind the drive piston an air pressure on the connecting channel to that in front of the percussion piston located third chamber is performed.
- This will, when moving back of the drive piston, the return movement of the percussion piston independently of its rebound after the blow and that of the first chamber transferred suction effect of the drive piston supported.
- a reliable one Return movement of the percussion piston even under difficult operating conditions is the result, so that when the Drive piston another powerful blow can be performed.
- the communicating connection between the second chamber and the third chamber allows one by the movement of the drive piston caused pressure change in the second chamber over the Connection channel affects a pressure change in the third chamber.
- the drive piston guided in the striking mechanism housing while the percussion piston guided in a cavity formed on an end face of the drive piston is (claim 2).
- the percussion piston is guided in the percussion mechanism housing, while the drive piston is guided in a cavity formed in an end face (claim 3).
- the solution according to the invention is suitable for both of the air spring hammer types mentioned.
- the drive piston is advantageously designed such that it has a the drive surface and the rear surface forming piston head, a holder for attachment to a drive and a the piston head with the bracket connecting connecting link.
- This design enables that between arranged the piston head and the bracket of the rear tube sheet can be, which forms the second chamber in a simple manner.
- an idle channel provided the at least one in a wall of the drive piston has existing idle opening and a wall of the Percussion mechanism housing penetrates.
- the idle channel is either with the Connection channel or the environment associated. On the Idle channel, it is possible to short-circuit the first and the second chamber. so that no pressure ratios build up in the air spring hammer mechanism can act on the percussion piston when the air spring hammer mechanism is in idle mode.
- one is movable Control spool provided between a striking position and a Idle position is switchable and the connection in a striking position between the second and the third chamber via the connecting channel establishes while blocking the idle channel.
- In an idle position it interrupts the connection channel and opens the idle channel, thereby adjust the transition between idle and striking position precisely to be able to.
- the axial displacement of the control slide takes place advantageously in that the control slide with the tool or coupled between striking piston and die arranged die, with the tool or the striking die when changing to idle lifting off the rock slides out of the housing a little, causing the spool can also follow the movement.
- FIG. 1 and 2 show an air spring hammer mechanism according to the invention in Beat or idle position.
- a drive piston 2 is turned into a Connecting rod 3 in, not shown, belonging to a known crank mechanism oscillating axial movement offset.
- the connecting rod 3 is articulated on a holder 4 of the drive piston 2.
- the Bracket 4 is integrally connected to a piston head 6 via a central link 5.
- the thus from the bracket 4, the middle member 5 and the piston head 6 existing drive piston 2 can - differently than shown in the figure - can also be assembled from several parts if this is from manufacturing or installation reasons is appropriate.
- a cavity 8 is formed on a front end face 7 of the drive piston 2, in which a percussion piston 9 is inserted axially movable. Between the drive piston 2 and the percussion piston 9 is one of the drive piston 2 surrounded first chamber 10 is provided, in which in the initial state Air with ambient atmosphere.
- the drive piston 2 moves forward. i.e. - based on Figures 1 and 2 - to the left. Because of its inertia delayed subsequent percussion piston 9 increases in the first chamber 10 of the air pressure, so that an air spring forms, the transfers its energy to the percussion piston 9 with a delay. This will finally also accelerated forward and only met schematically shown striker 11, where the kinetic energy of the percussion piston 9 is transmitted as impact energy.
- the striker 11 gives the impact energy to a tool, not shown, e.g. a chisel, on. Instead of of the striker 11, a shank of the tool can also be used directly his.
- the problem is solved according to the invention in that a connecting channel 13 is provided, the second chamber 14 with a third chamber 15 brings in communicating connection.
- the second chamber 14 is - seen in the direction of impact - behind a drive surface 16 of the drive piston 2 arranged. As from Figures 1 and 2 can be seen, the second chamber 14 is one of the piston head 6th provided rear surface 17, one belonging to the striking mechanism housing 1 rear tube sheet 18, the middle member 5 and the actual hammer mechanism housing 1 formed.
- the third chamber 15 is arranged in front of a rear surface 19 of the percussion piston 9 and is from a front surface serving as a face 20 of the Percussion piston 9, a front belonging to the percussion mechanism housing 1 Tube plate 21, the actual percussion mechanism housing 1 and the drive piston 2 formed.
- a wall 22 of the drive piston 2 there are several idle openings 23 formed in front of one formed in the striking mechanism housing 1 Move the idle groove 24 back and forth when the drive piston 2 moves axially.
- the idle groove 24 is connected to the connecting duct via an air duct 25 13 in connection.
- the idle openings 23, the idle groove 24 and the air duct 25 together form an idle duct.
- the striking mechanism goes idle when the operator of a drilling or Hammer, in which the striking mechanism is used, the tool from the rock to be processed. This causes the tool to slide and the striker 11 a certain distance from the striking mechanism housing 1 out.
- the percussion piston 9 follows this path and reaches the one in FIG. 2 position shown.
- the percussion piston 9 passes over an area of one Fixed edge 26, which creates a connection between the first Chamber 10 via the idle openings 23, the idle groove 24 and the air duct 25 to the connecting channel 13 is formed.
- FIG. 3 and 4 schematically show a sectional view of a second Embodiment of the invention.
- the same parts as in the first embodiment are identified with the same reference numerals, whereby a new description is dispensed with.
- Control slide 28 is provided by a against the striking mechanism housing 1 supported spring 29 is acted upon on one side.
- the control slide 28 can be depending on the position of the striker 11 between one in Fig. 3 shown impact position and an idle position shown in Fig. 4 move.
- control slide 28 In the control slide 28 is a connection opening 30 and an idle opening 31 provided.
- the control slide 28 is in the striking position in a position in which the connection opening 30 a connection between the connecting channel 13 and the third chamber 15 allows while the control slide 28 connects the first chamber 10 to the environment prevents that the idle opening 31 is not above the Air duct 25 is.
- connection opening 30 connects the connection channel 13 interrupts while the idle opening 31 via the air duct 25 is moved. This allows the first chamber 10 to communicate with the environment be associated, resulting in reliable idle behavior established.
- control slide 28 requires a larger structural Effort, but has the advantage that the idle travel, i.e. the Path by which the tool must slide out of the striking mechanism housing 1 is shortened can become what is reflected in a shorter design.
- FIGS. 5 and 6 A variant of this is shown as a third embodiment in FIGS. 5 and 6 again in the striking and idling position.
- This third embodiment differs from the second embodiment according to FIGS. 3 and 4 in that the control slide 28 has a greater axial length and still extends over the region of the second chamber 14.
- a connection opening 32 and a ventilation opening 33 are provided in the control slide 28.
- control slide 28 is in the Location, all openings to the first chamber 10, the second chamber 14 and the third chamber 15 to control.
- the spool 28 in 5 is in the striking position, he puts over the connecting channel 13 a communicating with the connection openings 30 and 32 Connection between the second chamber 14 and the third chamber 15 ago.
- the control slide 28 In the idle position, the control slide 28 is guided forward, whereby the idle opening 31 is moved via the air duct 25 and a connection between the first chamber 10 and the environment To avoid pressure build-up in the first chamber 10. Will continue A connection between the second chamber via the ventilation opening 33 14 and the environment, so that the second chamber 14 vent can, without air must be discharged through the connecting channel 13 or that an increased air pressure arises in the connecting duct 13.
- FIGS. 7 and 8 As an alternative to this, another fourth shown in FIGS. 7 and 8 will be used Embodiment proposed, which is different from that shown in FIGS. 3 to 6 Embodiments differs in that the connecting channel 13 via a connecting piece 34 to the idle opening 31 in the control slide 28 is performed.
- the third chamber 15 is through the spool 28 from the connecting channel 13 separated and thus does not experience any increase in pressure either.
- the Percussion piston 9 remains in the position shown in Fig. 8 without the Drive piston 2 can be lifted off.
- FIG. 9 shows, as a fifth embodiment, another type of the invention Air spring hammer mechanism, in which a percussion piston 40 in a hammer mechanism housing 1 is guided axially movable.
- the striking mechanism In the top half of Fig. 9 is the striking mechanism is shown in striking position, while the lower half of Fig. 9 shows the striking mechanism in the idle position.
- a cavity 42 is located on a rear end face 41 of the percussion piston 40 formed in which a drive piston 43 is guided.
- the drive piston 43 is similar to the previous embodiments constructed and consists essentially of a bracket 44, a central link 45 and a piston head 46.
- a first chamber 49 is formed between a drive surface 47 of the drive piston 43 and a rear surface 48 of the percussion piston 40.
- a second embodiment is analogous to the embodiments already described Chamber 50 behind a rear surface 51 of the drive piston 43 and one third chamber 52 formed in front of a front surface 53 of the percussion piston 40.
- the second chamber 50 and the third chamber 52 are through a communication channel 54 connected.
- the percussion piston 40 has an extension 55, one of which is not shown Döpper or a tool, also not shown, applied.
- connection between the first chamber 49 and the second chamber 50 there is an idle channel 56 which is in the idle position of the striking mechanism a connection between the first chamber 49 and the second chamber 50.
- a junction 57 of the connecting channel 54 is covered in this case by the percussion piston 40, so that communication between the second chamber 50 and the third Chamber 52 is interrupted.
- the further structure of the striking mechanism corresponds to that already described Embodiments, so that a new description is dispensed with can be.
- the different design options with regard to the connecting channel and the spool can also be transferred to this type of impact.
- the second chamber can be used in other embodiments of the invention also a small-sized one, in connection with the connecting channel space that can be brought in and sealed off from the environment, the one behind the drive piston is arranged and in which at least part of the drive device is provided for the drive piston.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Percussive Tools And Related Accessories (AREA)
Description
- Fig. 1
- eine schematische Schnittdarstellung eines erfindungsgemäßen Luftfederschlagwerks in Schlagstellung;
- Fig. 2
- das Schlagwerk aus Fig. 1 in Leerlaufstellung;
- Fig. 3
- eine schematische Schnittdarstellung einer zweiten Ausführungsform des erfindungsgemäßen Luftfederschlagwerks in Schlagstellung;
- Fig. 4
- das Schlagwerk gemäß Fig. 3 in Leerlaufstellung;
- Fig. 5
- eine dritte Ausführungsform eines erfindungsgemäßen Luftfederschlagwerks in Schlagstellung;
- Fig. 6
- das Schlagwerk gemäß Fig. 5 in Leerlaufstellung;
- Fig. 7
- eine vierte Ausführungsform eines erfindungsgemäßen Luftfederschlagwerks in Schlagstellung;
- Fig. 8
- das Schlagwerk gemäß Fig. 7 in Leerlaufstellung;
- Fig. 9
- einen anderen Schlagwerkstyp als fünfte Ausführungsform für ein erfindungsgemäßes Luftfederschlagwerk in Schlag- und Leerlaufstellung.
In dem Steuerschieber 28 ist außer der Verbindungsöffnung 30 und der Leerlauföffnung 31 eine Verbindungsöffnung 32 und eine Lüftungsöffnung 33 vorgesehen.
Claims (13)
- Luftfederschlagwerk, miteinem Schlagwerkgehäuse (1);einem in dem Schlagwerkgehäuse (1) axial hin und her treibbaren Antriebskolben (2; 43);einem, in Schlagrichtung vor einer Antriebsfläche (16; 47) des Antriebskolbens (2; 43) angeordneten, koaxial zu dem Antriebskolben axial beweglichen Schlagkolben (9; 40);einer vor der Antriebsfläche (16; 47) des Antriebskolbens (2; 43) und hinter einer Rückfläche (19; 48) des Schlagkolbens (9; 40) angeordneten ersten Kammer (10; 49);einer hinter der Antriebsfläche (16; 47) des Antriebskolbens (2; 43) ausgebildeten zweiten Kammer (14; 50); und miteiner vor der Rückfläche (19; 48) des Schlagkolbens (9; 40) ausgebildeten dritten Kammer (15; 52);
- Luftfederschlagwerk nach Anspruch 1, dadurch gekennzeichnet, daßder Antriebskolben (2) in dem Schlagwerkgehäuse (1) geführt ist;die Antriebsfläche (16) des Antriebskolbens (2) in einer Höhlung (8) einer vorderen Stirnfläche (7) des Antriebskolbens ausgebildet ist;der Schlagkolben (9) in der Höhlung (8) des Antriebskolbens (2) geführt ist; und daßdie erste Kammer (10) in der Höhlung (8) des Antriebskolbens (2) vorgesehen ist.
- Luftfederschlagwerk nach Anspruch 1, dadurch gekennzeichnet, daßder Schlagkolben (40) in dem Schlagwerkgehäuse (1) geführt ist;die Rückfläche (48) des Schlagkolbens (40) in einer Höhlung (42) einer hinteren Stirnfläche (41) des Schlagkolbens ausgebildet ist;der Antriebskolben (43) in der Höhlung (42) des Schlagkolbens (40) geführt ist; und daßdie erste Kammer (49) in der Höhlung (42) des Schlagkolbens (40) vorgesehen ist.
- Luftfederschlagwerk nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß die zweite Kammer (14) zwischen einer Rückfläche (17) des Antriebskolbens (2) und einem am Schlagwerkgehäuse (1) befestigten hinteren Rohrboden (18) angeordnet ist.
- Luftfederschlagwerk nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß die dritte Kammer (15) zwischen einer Vorderfläche (20) des Schlagkolbens (9) und einem am Schlagwerkgehäuse (1) befestigten vorderen Rohrboden (21) angeordnet ist.
- Luftfederschlagwerk nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß der Antriebskolben (2) einen die Antriebsfläche (16) und die Rückfläche (17) bildenden Kolbenkopf (6), eine Halterung (4) zur Befestigung an einem Antrieb und ein den Kolbenkopf (6) mit der Halterung (4) verbindendes Mittelglied (5) aufweist.
- Luftfederschlagwerk nach Anspruch 6, dadurch gekennzeichnet, daß der hintere Rohrboden (18) zwischen dem Kolbenkopf (6) und der Halterung (4) des Antriebskolbens (2) angeordnet ist und von dem Mittelglied (5) des Antriebskolbens (2) durchdrungen wird.
- Luftfederschlagwerk nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß ein Leerlaufkanal (23, 24, 25) vorgesehen ist, der wenigstens eine in einer Wandung (22) des Antriebskolbens (2) vorhandene Leerlauföffnung (23) aufweist und eine Wandung des Schlagwerkgehäuses (1) durchdringt.
- Luftfederschlagwerk nach Anspruch 8, dadurch gekennzeichnet, daß in einem Leerlaufbetrieb die erste Kammer (10) über den Leerlaufkanal (23, 24, 25) mit dem Verbindungskanal (13) in Verbindung bringbar ist.
- Luftfederschlagwerk nach Anspruch 9, dadurch gekennzeichnet, daß ein axial verschieblicher Steuerschieber (28) vorgesehen ist, der in einer Schlagstellung den Verbindungskanal (13) öffnet und den Leerlaufkanal (23, 24, 25) unterbricht, sowie in einer Leerlaufstellung den Verbindungskanal (13) unterbricht und den Leerlaufkanal öffnet, wobei die erste (10) und die zweite (14) Kammer in kommunizierende Verbindung bringbar sind.
- Luftfederschlagwerk nach Anspruch 8, dadurch gekennzeichnet, daß in einem Leerlaufbetrieb die erste Kammer (10) über den Leerlaufkanal (23, 24, 25) mit der Umgebung in Verbindung bringbar ist.
- Luftfederschlagwerk nach Anspruch 11, dadurch gekennzeichnet, daß ein axial verschlleblicher Steuerschieber (28) vorgesehen ist, der in einer Schlagstellung den Verbindungskanal (13) öffnet und den Leerlaufkanal (23, 24, 25) unterbricht, sowie in einer Leerlaufstellung den Verbindungskanal (13) unterbricht und den Leerlaufkanal (23, 24, 25) öffnet.
- Luftfederschlagwerk nach Anspruch 1, dadurch gekennzeichnet, daß die zweite Kammer hinter dem Antriebskolben (2, 43) angeordnet ist.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19843642 | 1998-09-23 | ||
DE19843642A DE19843642B4 (de) | 1998-09-23 | 1998-09-23 | Luftfederschlagwerk mit Rückholluftfeder |
PCT/EP1999/005937 WO2000016948A1 (de) | 1998-09-23 | 1999-08-13 | Luftfederschlagwerk mit rückholluftfeder |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1117508A1 EP1117508A1 (de) | 2001-07-25 |
EP1117508B1 true EP1117508B1 (de) | 2002-10-16 |
Family
ID=7881980
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99944386A Expired - Lifetime EP1117508B1 (de) | 1998-09-23 | 1999-08-13 | Luftfederschlagwerk mit rückholluftfeder |
Country Status (6)
Country | Link |
---|---|
US (1) | US6523622B1 (de) |
EP (1) | EP1117508B1 (de) |
JP (1) | JP4518452B2 (de) |
DE (2) | DE19843642B4 (de) |
ES (1) | ES2186403T3 (de) |
WO (1) | WO2000016948A1 (de) |
Families Citing this family (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10103996C1 (de) | 2001-01-30 | 2002-10-02 | Wacker Werke Kg | Luftfederschlagwerk für einen Schlag- und/oder Bohrhammer mit kurz bauendem Antriebskolben |
DE10121088A1 (de) * | 2001-04-28 | 2002-11-07 | Bosch Gmbh Robert | Bohr- und/oder Meißelhammer |
DE10145464C2 (de) * | 2001-09-14 | 2003-08-28 | Wacker Construction Equipment | Bohr- und/oder Schlaghammer mit anpressdruckabhängiger Leerlaufsteuerung |
DE10216051A1 (de) * | 2002-04-11 | 2003-10-23 | Hilti Ag | Pneumatisches Schlagwerk |
DE602004026134D1 (de) * | 2003-04-01 | 2010-05-06 | Makita Corp | Kraftwerkzeug |
DE10333799B3 (de) * | 2003-07-24 | 2005-02-17 | Wacker Construction Equipment Ag | Hohlkolbenschlagwerk mit Luftausgleichs- und Leerlauföffnung |
DE102004022623A1 (de) * | 2004-05-07 | 2005-12-08 | Robert Bosch Gmbh | Handwerkzeugmaschine mit einem Schlagwerk |
US7140450B2 (en) * | 2004-10-18 | 2006-11-28 | Battelle Energy Alliance, Llc | Percussion tool |
EP1674213B1 (de) * | 2004-12-23 | 2008-10-01 | BLACK & DECKER INC. | Kraftwerkzeug mit Kühlvorrichtung |
EP1674211A1 (de) * | 2004-12-23 | 2006-06-28 | BLACK & DECKER INC. | Gehäuse für ein kraftgetriebenes Werkzeug |
ATE396841T1 (de) * | 2004-12-23 | 2008-06-15 | Black & Decker Inc | Kraftwerkzeuggehäuse |
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 |
US8636081B2 (en) | 2011-12-15 | 2014-01-28 | Milwaukee Electric Tool Corporation | Rotary hammer |
US8695726B2 (en) | 2010-12-29 | 2014-04-15 | Medical Enterprises LLC | Electric motor driven tool for orthopedic impacting |
KR102127310B1 (ko) | 2010-12-29 | 2020-06-29 | 메디컬 엔터프라이시스 디스트리부션 엘엘씨 | 정형외과적 충돌을 위한 전기 모터 구동식 도구 |
DE102011078628A1 (de) * | 2011-07-05 | 2013-01-10 | Robert Bosch Gmbh | chlagwerkvorrichtung |
US8657028B2 (en) * | 2011-08-31 | 2014-02-25 | Raymond Stoner | Impact hammer |
EP2821183B1 (de) | 2013-07-05 | 2017-06-21 | Black & Decker Inc. | Bohrhammer |
CA3146951A1 (en) | 2014-03-27 | 2015-10-01 | Techtronic Power Tools Technology Limited | Powered fastener driver and operating method thereof |
US11613869B2 (en) * | 2015-10-05 | 2023-03-28 | Terminator Ip Limited | Reciprocating impact hammer |
WO2017061880A1 (en) * | 2015-10-05 | 2017-04-13 | Angus Robson | Reciprocating impact hammer |
EP3281747A1 (de) * | 2016-08-09 | 2018-02-14 | HILTI Aktiengesellschaft | Handwerkzeugmaschine |
EP3697574A1 (de) | 2017-10-20 | 2020-08-26 | Milwaukee Electric Tool Corporation | Schlagwerkzeug |
WO2019147919A1 (en) | 2018-01-26 | 2019-08-01 | Milwaukee Electric Tool Corporation | Percussion tool |
US10710229B2 (en) | 2018-04-18 | 2020-07-14 | Raymond Stoner | Impact hammer |
US11583987B2 (en) | 2018-04-18 | 2023-02-21 | Raymond Stoner | Impact hammer system |
JP6703055B2 (ja) * | 2018-08-17 | 2020-06-03 | メディカル エンタープライゼス ディストリビューション、 エルエルシー | 整形外科用衝撃付与電気モータ駆動器具 |
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DE2016964B2 (de) * | 1970-04-09 | 1977-09-15 | Robert Bosch Gmbh, 7000 Stuttgart | Von hand gefuehrter hammer mit eingebautem elektrischen antriebsmotor |
DE2641070A1 (de) * | 1976-09-11 | 1978-03-16 | Bosch Gmbh Robert | Motorisch angetriebener schlaghammer mit luftfederung |
US4759260A (en) * | 1978-05-17 | 1988-07-26 | Lew Yon S | Super reliable air-spring return air cylinder |
US4290492A (en) * | 1979-01-31 | 1981-09-22 | Black & Decker Inc. | Idling and air replenishing system for a reciprocating hammer mechanism |
DE3010479A1 (de) * | 1980-03-19 | 1981-10-08 | Robert Bosch Gmbh, 7000 Stuttgart | Werkzeugmaschine, insbesondere handwerkzeugmaschine mit einem luftfederschlagwerk |
CH664730A5 (de) * | 1983-07-21 | 1988-03-31 | Sig Schweiz Industrieges | Verfahren und vorrichtung zur daempfung des rueckpralles bei schlagwerkzeugen. |
GB2165279B (en) * | 1984-10-03 | 1987-12-23 | Inst Gornogo Dela Sibirskogo O | Air-operated reversible percussive action machine |
US5108400A (en) * | 1988-01-21 | 1992-04-28 | Aesculap Ag | Striking tool for surgical instruments |
US4828046A (en) * | 1988-04-28 | 1989-05-09 | Vladimir Pyatov | Vacuum-compression type percussion power tool with an auxiliary chamber |
US4932479A (en) * | 1988-05-05 | 1990-06-12 | Vladimir Pyatov | Vacuum-compression type percussion power tool with a pumping chamber |
ZA908924B (en) * | 1990-01-15 | 1991-08-28 | Sulzer Ag | A percussion device |
JP3459493B2 (ja) * | 1995-05-25 | 2003-10-20 | 株式会社マキタ | 打撃工具 |
JP3574240B2 (ja) * | 1995-11-13 | 2004-10-06 | 株式会社マキタ | ハンマードリル |
JPH09300243A (ja) * | 1996-05-21 | 1997-11-25 | Ryobi Ltd | 空打ち防止機構を有する打撃工具 |
-
1998
- 1998-09-23 DE DE19843642A patent/DE19843642B4/de not_active Expired - Fee Related
-
1999
- 1999-08-13 EP EP99944386A patent/EP1117508B1/de not_active Expired - Lifetime
- 1999-08-13 JP JP2000573888A patent/JP4518452B2/ja not_active Expired - Fee Related
- 1999-08-13 US US09/674,968 patent/US6523622B1/en not_active Expired - Fee Related
- 1999-08-13 DE DE59903113T patent/DE59903113D1/de not_active Expired - Lifetime
- 1999-08-13 WO PCT/EP1999/005937 patent/WO2000016948A1/de active IP Right Grant
- 1999-08-13 ES ES99944386T patent/ES2186403T3/es not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
ES2186403T3 (es) | 2003-05-01 |
WO2000016948A1 (de) | 2000-03-30 |
JP2002526275A (ja) | 2002-08-20 |
DE59903113D1 (de) | 2002-11-21 |
US6523622B1 (en) | 2003-02-25 |
DE19843642A1 (de) | 2000-04-06 |
EP1117508A1 (de) | 2001-07-25 |
JP4518452B2 (ja) | 2010-08-04 |
DE19843642B4 (de) | 2004-03-25 |
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