EP2203276A1 - Arbeitsgerät mit drehzahlabsenkung und arbeitsverfahren dafür - Google Patents
Arbeitsgerät mit drehzahlabsenkung und arbeitsverfahren dafürInfo
- Publication number
- EP2203276A1 EP2203276A1 EP08801718A EP08801718A EP2203276A1 EP 2203276 A1 EP2203276 A1 EP 2203276A1 EP 08801718 A EP08801718 A EP 08801718A EP 08801718 A EP08801718 A EP 08801718A EP 2203276 A1 EP2203276 A1 EP 2203276A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gas
- operator
- holding device
- carrier
- actuating element
- 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
Links
- 230000009467 reduction Effects 0.000 title description 3
- 238000011017 operating method Methods 0.000 title 1
- 238000002485 combustion reaction Methods 0.000 claims abstract description 31
- 230000005540 biological transmission Effects 0.000 claims description 17
- 230000008859 change Effects 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 5
- 230000007935 neutral effect Effects 0.000 claims description 3
- 230000004044 response Effects 0.000 claims description 3
- 230000000994 depressogenic effect Effects 0.000 abstract description 2
- 238000009527 percussion Methods 0.000 description 6
- 239000003054 catalyst Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000881 depressing effect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
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
- B25D9/26—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
- B25D17/00—Details of, or accessories for, portable power-driven percussive tools
- B25D17/04—Handles; Handle mountings
-
- 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
- B25D9/06—Means for driving the impulse member
- B25D9/10—Means for driving the impulse member comprising a built-in internal-combustion engine
-
- 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
- B25D9/265—Control devices for adjusting the stroke of the piston or the force or frequency of impact thereof with arrangements for automatic stopping when the tool is lifted from the working face or suffers excessive bore resistance
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D11/00—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
- G05G1/00—Controlling members, e.g. knobs or handles; Assemblies or arrangements thereof; Indicating position of controlling members
- G05G1/04—Controlling members for hand actuation by pivoting movement, e.g. levers
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
- G05G5/00—Means for preventing, limiting or returning the movements of parts of a control mechanism, e.g. locking controlling member
- G05G5/04—Stops for limiting movement of members, e.g. adjustable stop
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
- B25D2250/005—Adjustable tool components; Adjustable parameters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
- B25D2250/245—Spatial arrangement of components of the tool relative to each other
Definitions
- the invention relates to an internal combustion engine driven implement such as e.g. a striker, in particular a drill or breaker, a track tamping device or other device in which the operator must apply a force in a defined direction.
- a striker in particular a drill or breaker
- a track tamping device or other device in which the operator must apply a force in a defined direction.
- the invention further relates to a working method for such a working device.
- Impact devices often have a gasoline-powered internal combustion engine that drives a striking mechanism. The impact is transferred to a corresponding tool to achieve the desired working effect.
- the impact devices are mainly used in two speed ranges. There is a difference between idle and full load operation. Full load operation corresponds to the operating mode in which the device operates in the intended manner.
- the operating mode of the internal combustion engine - and thus the distinction between idling and full load - can be selected by the operator with the aid of a throttle lever housed in a handle. If the impact device relieved and in particular the percussion is no longer charged, z. B. when moving or lifting the striker from the ground, the throttle often remains in full load position because the operator still holds it. The throttle valve then remains fully open. In this operating condition, only a slight power loss is taken from the engine. Unless control measures are taken, the engine would rotate to its maximum speed, which would eventually be limited only by the internal engine gas dynamics. Achieving the maximum speed, however, leads to a reduction in the service life of the engine, the clutch and the drive gear. parts, high vibration levels and excessive noise.
- the ignition timing is adjusted in the direction of a delayed ignition. If this adjustment is not sufficient, the ignition is at least intermittently suspended. This function is stored in a characteristic curve in the ignition and serves to limit the speed.
- the invention has for its object to provide an implement in which the speed of an internal combustion engine is kept below a limit speed, even if the operator still operates a throttle without the disadvantages described above in connection with the prior art occur.
- An implement includes an internal combustion engine having a speed control device, a carrier accommodating the engine, a holding device provided on the carrier for holding the working device, and a gas actuating element movable relative to the holding device for operating by an operator and adjusting accordingly the speed control device on.
- the speed control device may include, among other things, a throttle in the carburetor of the internal combustion engine.
- the carrier receiving the internal combustion engine or connected to the internal combustion engine may be a tubular frame or a housing, which is attached to the internal combustion engine or at least partially surrounds the internal combustion engine.
- the carrier may have a motor at least partially surrounding hood.
- the provided on the support holding device may, for. B. have two handles where the operator can hold and run the implement.
- the movable relative to the holding means gas actuating element may be a throttle lever which is provided in or on one of the handles.
- the holding device is movable relative to the carrier in at least two defined positions depending on a loading by the operator, wherein a first position corresponding to a position in which the operator lifts the implement against a main working direction, and a second position of a position corresponds to where the operator presses the implement in the main working direction.
- first position corresponding to a position in which the operator lifts the implement against a main working direction
- second position in which the operator holds and guides the working device on the holding device and thus usually presses down
- first position the rest position
- the holding device must assume one of the two defined positions depending on the resulting load conditions.
- the gas actuation element is movable to at least two positions in response to operator action, wherein a first position corresponds to a position where the operator does not actuate the gas actuation element and a second position corresponds to a position where the operator manipulates and actuates the gas actuation element if necessary against one Stop presses.
- a first position corresponds to a position where the operator does not actuate the gas actuation element
- a second position corresponds to a position where the operator manipulates and actuates the gas actuation element if necessary against one Stop presses.
- a transmission device may be provided at least on the holding device, wherein the position of the transmission device likewise changes relative to the carrier as a function of the position of the holding device.
- the transmission device may e.g. be formed by a stop or by another, correspondingly suitable geometry or suitable active surfaces. It is important that - as will be explained later - the position of the holding device has an influence on the position of the gas actuation element, so that the engine speed is also influenced by pressing or pulling the holding device.
- the transmission device can - as stated - have a stop against which the gas actuating element is pressed in its second position and which is provided on the holding device. Its position accordingly changes depending on the position of the holding device also relative to the carrier. Thus, when the holding device is in its first position, the stop is in a different position than when the holding device is in its second position.
- stop Since the stop is to act between the holding device and the gas actuating element, of course, an effective surface must be present in each case on the holding device and the gas actuating element.
- the two active surfaces then act against each other and are jointly defined as a "stop".
- the gas actuator changes its position in dependence from the position of the holding device and, accordingly, from the position of the stop, even without a change in the operation of the gas actuating element by the operator.
- a change in the position of the Gasbetuschists- elements is automatically achieved, which leads to a corresponding setting of the speed control device, in particular the throttle in the engine.
- the throttle valve can be adjustable in relation to the carrier in accordance with a relative position of the gas actuating element. Since the relative position of the gas actuating element in relation to the carrier also changes when - despite permanently pressed or actuated gas actuating element - the position of the holding device is changed, the throttle position must inevitably change, resulting in the desired setting or limiting the speed leads.
- the implement may be a percussion device, such as a drill or breaker, a track tamping tool, a power cutter, or a chain saw.
- the main working direction is the direction in which the operator presses the implement.
- Gas actuating element, the holding device and the carrier are at least three defined states by appropriate loads or operations of the operator adjustable:
- the gas actuation element In a first state, the gas actuation element is pushed forwards, in the main working direction into its "second position” and also the holding device in the main working direction into its "second position".
- the gas actuating element takes a - seen in the main working direction - foremost extreme position.
- the speed control device coupled to the gas actuator decreases, e.g. the throttle valve a full-load position, so that the internal combustion engine is operable under full load.
- the gas actuating element In a second state, the gas actuating element is also pushed forward, in the main working direction, while the holding device is pressed or pulled counter to the main working direction into its "first position".
- This condition can be z. B. set when the operator lifts while still pressing the gas actuator, the implement from the ground to reposition it elsewhere again. Due to the effect of provided between the holding device and the gas actuating element transmission device, ie, for example, a stop, the gas actuating element can not now take the foremost extreme position, but a reduced position on the other hand.
- the speed control device then assumes a partial load position, so that the engine is driven in partial load operation.
- the gas actuator In a third state, the gas actuator is unloaded, thereby requiring the operator to idle the engine. The gas actuator thereby assumes its "first position".
- the holding device can be pressed against, but also in the direction of the main working direction.
- the gas actuating element then assumes a rearmost extreme position, so that the
- the speed control device may - as already explained above - have a throttle valve. Likewise, however, it may also relate to other known elements for controlling the engine speed and thereby achieve the desired control effect.
- the holding device can be pivotable relative to the carrier. This ensures reliable and safe operation.
- the gas actuating element can be pivoted relative to the holding device in order to enable the desired relative movements.
- the holding device can have at least one, but meaningfully two handles on which the operator holds the tool, leads or raises.
- the gas actuating element is at least partially disposed in the interior of the handle. In this way, the gas actuator can be integrated into the handle.
- the gas actuating element can be arranged above the handle or accessible from above be. It is then easy for the operator to depress the gas actuation element while gripping the handle with the palm of his hand in order to actuate it. As long as he holds the handle tightly, he simultaneously actuates the gas actuation element, without the need for further considerations or measures for the operator.
- the carrier may have a boom on which the handle and the gas actuation element are mounted pivotably relative to each other.
- the cantilever from the carrier wegkragen or protrude may be pivotable about a pivot axis which is disposed at an end remote from the carrier of the boom.
- the handle and the gas actuation element are thus outside of the carrier, so z. B. on the housing, a tubular steel frame or a hood pivotally mounted.
- the stop provided between the handle and the gas actuating element serves to define a minimum distance between the handle and the gas actuating element.
- the gas actuation element and the handle must be able to touch each other via the stop. Accordingly, an active surface is provided in each case, wherein the two cooperating active surfaces form the stop.
- the stop can be adjustable, such that different minimum distances in advance -. For example, they can be adjusted at the factory of the manufacturer. By the minimum distance is given, which part load position occupies the throttle valve in the second state described above.
- the change of a loading direction on the holding device can be carried out slidably. This is how it is, for example. possible for the operator continuously reduces the contact pressure and finally lifts the implement. In order to avoid an undefined state, it may be expedient to provide a fixed switching point for a change in the direction of loading, in which the change takes place between full load and partial load. Alternatively, it is also possible to realize a sliding change with a sliding speed adjustment.
- a working method for a working device wherein the working device has an internal combustion engine with a speed control device, a carrier connected to the internal combustion engine, holding means provided on the carrier for holding the working device and a gas actuating element for actuation by an operator and speaking setting the speed control device.
- the speed control device assumes a full load position when the operator actuates the gas actuation element and presses the holding device in a main working direction. If, on the other hand, the operator operates the gas actuating element and presses the holding device counter to the main working direction, the speed control device assumes a partial load position. When the operator does not operate the gas actuating element, the speed control device assumes an idling position.
- Figure 1 shows a schematic sectional view of a detail of serving as an implement impact device in a first state.
- FIG. 2 shows the impact device in a second state. and Fig. 3, the striker in a third state.
- FIG. 1 to 3 each show a schematic representation of a gasoline-driven breaker hammer or a track tamping device as impact device in a lateral sectional view in various operating states. Parts of the device are shown only schematically.
- the impact device is driven by an internal combustion engine 1 shown only symbolically, which is not shown
- the internal combustion engine 1 has a
- Throttle valve 2 is also shown only schematically. Your
- the position of the throttle valve 2 can be adjusted between a fully open position corresponding to a full load or full throttle mode (FIG. 1) via a partial load position (partially open, FIG. 2) to an idle position (largely closed, FIG. 3).
- the adjustment of the throttle valve 2 is effected by means of a linkage or Bowden cable 3, which transmits the actuating movement of a throttle lever 4 to the throttle valve 2.
- a linkage or Bowden cable 3 which transmits the actuating movement of a throttle lever 4 to the throttle valve 2.
- an operator can select by suitable actuation, which position the throttle valve 2 and thus which speed of the internal combustion engine is to occupy.
- As the percussion, are of a serving as a carrier
- the housing 5 can therefore also be formed by a pipe or sheet metal carrier.
- the housing 5 may completely or partially surround the internal combustion engine and / or the striking mechanism. So there is an embodiment in which the housing 5, the engine only partially, such as a hood surrounds.
- a boom 6 extends laterally away.
- two arms 6 will be provided which extend away from the housing 5 on opposite sides.
- a handle 7 is attached, on which the operator can hold and guide the striker.
- the handle 7 is movable about a pivot axis 8 relative to the expander 6 in at least two positions, as Figs. 1 and 2 show.
- the throttle lever 4 about the pivot axis 8 relative to the boom 6 and thus to the housing 5, the internal combustion engine 1 and the throttle valve 2 is movable.
- the movement of the throttle lever 4 is transmitted via the Bowden cable 3 to the throttle valve 2 Ü.
- a transmission stop screw 9 Between the throttle lever 4 and the handle 7 a belonging to a transmission stop screw 9 is provided.
- the stop screw 9 can be screwed into the throttle 4 with different depths. Your screw head interacts with a stop surface 10 on the handle 7.
- the stop screw 9 and the abutment surface 10 form an effective abutment between the gas lever 4 and the handle 7 for defining a minimum distance.
- the depth of engagement of the stop screw 9 is adjustable in order to realize a different minimum distance or minimum distance between the throttle lever 4 and the handle 7. In this way, it is possible to specify already from the factory a defined relative position, which then corresponds to the later setting in operation partial load position. Below, three different operating states of the percussion device will be explained with reference to FIGS. 1 to 3.
- FIG. 1 shows a first operating state in which the operator holds the impact device in the working position, that is to say largely vertically downwards, thereby pressing the gas lever 4 downwards. Consequently, not only the throttle lever 4 is pivoted to its extreme position down, but also the handle 7 is in its lowermost position. Accordingly, the throttle valve 2 is fully open, so that the internal combustion engine 1 is driven in full load operation.
- Fig. 2 an operating state is shown in which the operator lifts the striker from the ground to change the working position. Since the operator holds the handle 7 fully encompassed, the handle 7 pivots relative to the boom 6 upwards. At the same time, however, the throttle lever 4 is still pressed down in its respective possible extreme position. Due to the interaction between the stopper screw 9 on the throttle lever 4 and the stop surface 10 on the handle 7, however, the throttle lever 4 is raised slightly from the position shown in Fig. 1, so that the Bowden cable 3 changes its position by the distance b. Consequently, the throttle valve 2 closes in the intended manner, so that the engine is driven only in partial load operation.
- FIG. 3 shows a state in which the operator has raised the striker with the aid of the handle 7. In addition, the operator has relieved the throttle 4, so that the throttle lever can reach its maximum extreme position. This position is transmitted via the Bowden cable 3 to the throttle valve 2, whereby an idling operation of the internal combustion engine 1 is established.
- the idle speed can be z. B. in a range of 1800 to 2000 min-1, while the rated speed is usually in a range of 4200 to 4500 min-1.
- any suitable mode of operation of the motor may be adjusted in the partial load mode shown in FIG.
- the partial load speed may be in the range of the rated speed (with the impact device is largely relieved in part-load operation).
- any speed can be set in between. This is at the discretion of the manufacturer.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Automation & Control Theory (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007046603A DE102007046603A1 (de) | 2007-09-28 | 2007-09-28 | Arbeitsgerät mit Drehzahlabsenkung und Arbeitsverfahren dafür |
PCT/EP2008/006989 WO2009043414A1 (de) | 2007-09-28 | 2008-08-26 | Arbeitsgerät mit drehzahlabsenkung und arbeitsverfahren dafür |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2203276A1 true EP2203276A1 (de) | 2010-07-07 |
EP2203276B1 EP2203276B1 (de) | 2015-10-14 |
Family
ID=40095910
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08801718.1A Active EP2203276B1 (de) | 2007-09-28 | 2008-08-26 | Arbeitsgerät mit Drehzahlabsenkung und Arbeitsverfahren dafür |
Country Status (5)
Country | Link |
---|---|
US (1) | US8272364B2 (de) |
EP (1) | EP2203276B1 (de) |
CN (1) | CN101743100B (de) |
DE (1) | DE102007046603A1 (de) |
WO (1) | WO2009043414A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI690312B (zh) * | 2018-01-05 | 2020-04-11 | 緯創資通股份有限公司 | 旋轉定位機構與載具 |
EP3822035A1 (de) * | 2019-11-14 | 2021-05-19 | Hilti Aktiengesellschaft | Handgriffvorrichtung für eine werkzeugmaschine |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE703206C (de) * | 1935-07-16 | 1941-03-04 | Meco Brennkraft Maschinen G M | Einlassorgan fuer Brennkraft-Ruettel- und Vibrationsgeraete |
FR1013668A (fr) * | 1940-10-12 | 1952-08-01 | Perfectionnements aux outils à percussion | |
DE884928C (de) * | 1943-09-12 | 1953-07-30 | Klaus Junkers | Brennkraftwerkzeug |
US2677360A (en) * | 1950-07-25 | 1954-05-04 | Chicago Pneumatic Tool Co | Handle starter arrangement for gas hammers |
US3241622A (en) * | 1964-07-13 | 1966-03-22 | Atlas Copco Ab | Means for preventing idle operation of percussion tools |
DE6931913U (de) * | 1969-08-13 | 1972-08-31 | Wacker Werke Kg | Drehzahlreguliervorrichtung an arbeitsgeraeten mit hin- und hergehender arbeitsbewegung des werkzeuges, vorzugsweise handhaemmer. |
DE3929441C2 (de) * | 1989-09-05 | 1998-09-10 | Stihl Maschf Andreas | Handgeführtes Arbeitsgerät |
JPH0914004A (ja) * | 1995-06-23 | 1997-01-14 | Kioritz Corp | ハンドレバー装置 |
JP3563182B2 (ja) * | 1995-11-13 | 2004-09-08 | 丸善工業株式会社 | エンジン式ブレーカ |
US6039024A (en) * | 1998-12-02 | 2000-03-21 | Capro, Inc. | Throttle control system |
SE523126C2 (sv) * | 2001-01-11 | 2004-03-30 | Electrolux Ab | Gasreglage för motordrivna handverktyg |
DE102004058579A1 (de) * | 2004-12-03 | 2006-06-08 | Robert Bosch Gmbh | Handwerkzeugmaschine |
US7152580B2 (en) * | 2004-12-16 | 2006-12-26 | Tecumseh Products Company | Engine speed control with high speed override mechanism |
JP4732378B2 (ja) * | 2007-02-12 | 2011-07-27 | 本田技研工業株式会社 | エンジン制御装置 |
US7926690B1 (en) * | 2007-06-13 | 2011-04-19 | Tippmann Sr Dennis J | Combustion powered driver |
-
2007
- 2007-09-28 DE DE102007046603A patent/DE102007046603A1/de not_active Ceased
-
2008
- 2008-08-26 US US12/672,162 patent/US8272364B2/en not_active Expired - Fee Related
- 2008-08-26 CN CN2008800243167A patent/CN101743100B/zh active Active
- 2008-08-26 WO PCT/EP2008/006989 patent/WO2009043414A1/de active Application Filing
- 2008-08-26 EP EP08801718.1A patent/EP2203276B1/de active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2009043414A1 * |
Also Published As
Publication number | Publication date |
---|---|
CN101743100A (zh) | 2010-06-16 |
CN101743100B (zh) | 2012-10-31 |
EP2203276B1 (de) | 2015-10-14 |
US20110220060A1 (en) | 2011-09-15 |
DE102007046603A1 (de) | 2009-04-02 |
WO2009043414A1 (de) | 2009-04-09 |
US8272364B2 (en) | 2012-09-25 |
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Free format text: ORIGINAL CODE: 0009012 |
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Effective date: 20100225 |
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