CN102310233A - The hand held power machine brake operating device - Google Patents
The hand held power machine brake operating device Download PDFInfo
- Publication number
- CN102310233A CN102310233A CN2011101938063A CN201110193806A CN102310233A CN 102310233 A CN102310233 A CN 102310233A CN 2011101938063 A CN2011101938063 A CN 2011101938063A CN 201110193806 A CN201110193806 A CN 201110193806A CN 102310233 A CN102310233 A CN 102310233A
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- Prior art keywords
- hand held
- power machine
- held power
- unit
- operating device
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
- B27B17/00—Chain saws; Equipment therefor
- B27B17/08—Drives or gearings; Devices for swivelling or tilting the chain saw
- B27B17/083—Devices for arresting movement of the saw chain
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- Life Sciences & Earth Sciences (AREA)
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- Mechanical Engineering (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
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Abstract
The present invention relates to a kind of hand held power machine brake operating device,, comprise that at least one is used to activate the executive component of a brake apparatus (14a-14d) (12a-12d) in particular for chain saw.The present invention's suggestion, this hand held power machine brake operating device has a reset unit (16a-16d), and said reset unit is set for said executive component (12a-12d) is automatically resetted.
Description
Technical field
The present invention relates to a kind of hand held power machine brake operating device.
Background technology
The hand held power machine brake operating device that is used for chain saw is known, and it has and is used to activate the operation of braking means element.This executive component remains in the application position after activating brake apparatus and up to the operator executive component is reset in the initial position.
Summary of the invention
The present invention relates to a kind of hand held power machine brake operating device, in particular for chain saw, have at least one and be used to activate the operation of braking means element.
The present invention's suggestion, the hand held power machine brake operating device comprises a reset unit, this reset unit is set for executive component is automatically resetted.On this meaning, " setting " should especially be interpreted as and set specially and/or specialized designs and/or dedicated programmed.Executive component is preferably when hand held power machine recoils, especially activate brake apparatus when the hand held power machine recoil (Kick-Back) that constitutes chain saw.But brake apparatus can be activated through the operating operation element by the operator equally.Preferably, the executive component unit that is reset automatically resets to the initial position from application position, in this initial position, preferably allows the chain saw that reruns.
" executive component " should especially be interpreted as parts at this, and these parts are set for by machinery, electricity and/or the coupling of electronics and directly or indirectly trigger brake apparatus and be particularly useful for directly being coupled with the operator." activation brake apparatus " should especially be interpreted as operate brake at this, especially opens and/or closed brake apparatus.Preferably, executive component constitutes operating lever, and it is opened and/or closed brake apparatus, especially link stop device." closed brake apparatus " should especially be interpreted as: the driving moment that is used for the cutter drives device is interrupted and/or the braking effectively of cutter drives device quilt, for example converts heat energy to through the kinergety with input, especially passes through CONTACT WITH FRICTION." opening brake apparatus " should especially be interpreted as: set up that the driving be used for the cutter drives device connects and/or cancellation braking moment and/or brake force and/or make the cutter drives device and braking device uncoupling and being released thus.
About the structure of the brake apparatus of hand held power machine and working method especially list of references EP 1 749 626 A1, the content of the structure of the content of the document, especially brake apparatus and working method aspect should be counted as the part of this specification disclosure.
Notion " automatically " should especially be defined as through reset unit reset operation element automatically at this, especially with the resetting of the power effect uncoupling of operator on executive component.Especially can realize in the following manner resetting automatically: trigger this through a connection device that constitutes dividually with executive component operating engaging means and reset; For example be used to set up the powered switch of motor through operation; Wherein, The reset force of this executive component of being used to reset can be applied by motor, and/or the starter of the starter through operating internal-combustion engines, for example assembly pulley etc. applies." engaging means " should especially be interpreted as a device at this, after operation, can realize through energy source the energy of motor unit being supplied with, especially can being realized being used for the energy supply of drive motor unit by this device.Engaging means can be made up of device machinery, electricity and/or electronics at this.Can advantageously realize high operation comfort by hand held power machine brake operating device configuration according to the present invention.
Suggestion in addition, reset unit has at least one back-moving spring." back-moving spring " should be interpreted as especially that one is used for stored energy, the parts of the energy of potential energy form especially, for example especially compression through medium, especially gas and/or the strain through material.Preferably, back-moving spring constitutes tension spring or compression spring.Resetting of executive component can advantageously and simple in structurely realize by this reset unit.Preferably, reset unit has at least one back-moving spring, and this back-moving spring can be saved the integrated said back-moving spring in ground, space thus around the rotation setting of executive component.
If back-moving spring constitutes helix torsion spring, then can advantageously realize saving the structure in space in addition." helix torsion spring " should especially be interpreted as an elastomeric element at this, and it preferably has the arm that at least two relative at least one windings extend tangently, and these arms especially constitute bent beam, and preferably interconnects through said at least one winding.
Also suggestion, reset unit has at least one motor unit that resets." motor unit resets " should especially be interpreted as a unit, and it has internal combustion engine, motor and/or technical staff and thinks that significant other motor that resets, the said motor that resets on purpose are set for driving moment and/or driving force are provided for resetting.At this, can advantageously realize simple in structure and comfortable the resetting of executive component.
Motor unit comprises at least one motor if reset, and then can realize the motor unit that resets compact especially and can be simply integrated on energy.
Preferably, reset unit has a delay unit, and this delay unit is set for executive component time-delay ground is resetted.The time delay that this statement " time-delay ground resets " is transmitted to executive component at this energy that should especially be defined as time delay, the especially reset unit of the reset unit triggering that after the operating operation element, is used for the reset operation element.Preferably, this time delay is greater than 2 seconds and be preferably greater than 5 seconds especially.Executive component through reset unit before application position is reset the initial position, can be advantageously to the triggering of operator's display operation element.
In a kind of particularly advantageous design of the present invention, reset unit has a damping unit, and this damping unit is set for executive component dampened ground is resetted." damping unit " should especially be interpreted as a unit at this; The kinergety that it on purpose is set for a kind of form of energy, especially executive component converts another kind of form of energy, especially heat energy to and especially is set for generation brake force, this brake force significantly, promptly especially with more than 50% and particularly preferably to surpass brake force through causing for the required frictional force of pure supporting more than 100% mode.Damping unit can be provided on the whole motion path of executive component or only on the part of the motion path of executive component, work, and wherein, the acting motion path of damping unit is preferably greater than 5mm and is preferably greater than 10mm especially.The parts of reset unit can be advantageously protected, the long life of reset unit can be advantageously realized thus.Especially can realize the favourable time-delay between application position and the initial position in addition, this time-delay is preferably greater than 2 seconds and is preferably greater than 5 seconds especially.
Suggestion in addition, the hand held power machine brake triggering device comprises a safe unit, is used to avoid make executive component reset operation element by reset unit after, by mistake activate hand held power machine." safe unit " should especially be interpreted as unit machinery, electricity and/or electronics at this, and it is set for according at least one parameter inhibition and/or allows the energy supply to the driver element of hand held power machine.Preferably, safe unit on purpose is set for the faulty operation of prevention to the hand held power machine that constitutes chain saw.Statement " unintentionally activate " should especially be defined as by engaging means by the operator undesirably and/or unconsciously to the driver element energize of hand held power machine at this.Can realize favourable security function thus.
The invention still further relates to a kind of hand held power machine, especially chain saw, have according to hand held power machine brake operating device of the present invention.Can advantageously realize a kind of hand held power machine friendly to the operator.
Description of drawings
Other advantage is provided by following description of drawings.Embodiments of the invention shown in the drawings.Accompanying drawing, specification and claim contain the big measure feature of combination.The technical staff also can individually consider these characteristics and be combined into significant other combination with suitable way.Wherein:
Fig. 1 with illustrate provide with good grounds hand held power machine brake operating device of the present invention according to hand held power machine of the present invention,
Fig. 2 illustrates the detail view according to hand held power machine brake operating device of the present invention with sketch map,
Fig. 3 illustrates at engaging means with sketch map and makes the detail view according to of the present invention hand held power machine brake operating device of executive component after resetting when being operated by reset unit,
Fig. 4 illustrates the detail view according to the hand held power machine brake operating device of the reset unit with conversion of the present invention with sketch map,
Fig. 5 illustrates the detail view according to the hand held power machine brake operating device of the reset unit with conversion of the present invention with sketch map, and this reset unit has reset driver, and
Fig. 6 illustrates the detail view according to the hand held power machine brake operating device of the reset unit with conversion of the present invention with sketch map, and this reset unit has damping element.
The specific embodiment
Fig. 1 illustrates a hand held power machine 34a who constitutes chain saw 36a, and it has a hand held power machine brake operating device 10a who is arranged among the housing unit 38a.In housing unit 38a, also be supported with a driver element 42a who constitutes motor 40a, in order to drive saw chain 44a.But what also can expect is that saw chain 44a thinks that by the technical staff significant other driver element 42a drives, for example by internal combustion engine.Saw chain 44a is bearing on the guide rail 46a, and this guide rail extends out from this housing unit 38a at the side 52a back to the Top carry handle 50a of chain saw 36a of housing unit 38a along principal spread direction 48a.In addition, chain saw 36a also has one and is arranged on being used among the Top carry handle 50a and starts engaging means 54a and an arc handgrip 56a who is used to guide chain saw 36a of motor 40a.
Hand held power machine brake operating device 10a comprises an executive component 12a who constitutes operating lever 58a for the activation of brake apparatus 14a.This operating lever 58a observes from Top carry handle 50a along principal spread direction 48a and is arranged on arc handgrip 56a front.This operating lever 58a is connected with the conversion ratchet 66a of brake apparatus 14a by the connection strap 64a (Fig. 2) of hand held power machine brake operating device 10a in order to activate brake apparatus 14a.Connection strap 64a has a deflectable spring element 70a at the side 68a back to operating lever 58a; This spring element is pressed against on the micro switch 72a of engaging means 54a when the executive component 80a of operation engaging means 54a, and this micro switch is set for to be opened and/or the closed current loop (Fig. 3) that is used for to motor 40a energising.With chain saw 36a processing work (not shown) the time; In the tip region of guide rail 46a by the so-called recoil (Kick-Back) that chain saw 36a possibly take place during the saw chain 44a sawing, especially during the hard subregion of hard object in touching workpiece or workpiece.Chain saw 36a is around an axis swing when recoil.Saw chain 44a and guide rail 46a swing towards the operator in second part, thereby there is high risk of injury in the operator.When recoil; Operating lever 58a is placed on the hand on the arc handgrip 56a through the operator and because the oscillating motion of chain saw 36a is operated, the feasible brake apparatus 14a that constitutes the link stop device is activated with being connected of conversion ratchet 66a through operating lever 58a and therefore suppresses the driving to saw chain 44a.In addition, being connected between the spring element 70a of connection strap 64a and micro switch 72a is separated, and makes motor 40a no power and get into inactive state.When chain saw 36a recoiled, operating lever 58a moved to the application position from initial position.
Hand held power machine brake operating device 10a has a reset unit 16a, and it is set for and makes the executive component 12a that constitutes operating lever 58a automatically reset to (Fig. 2) the initial position from application position.This reset unit 16a has a back-moving spring 18a, and this back-moving spring is provided with around the rotation 20a of executive component 12a.Back-moving spring 18a constitutes helix torsion spring 22a here.Helix torsion spring 22a has a first arm 60a and one second arm 62a, and they interconnect through winding.The first arm 60a and the second arm 62a are relative here, and this winding extends tangently.The first arm 60a is supported on the operating lever 58a.The second arm 62a is supported on the interior zone (not shown at this) of housing unit 38a.Helix torsion spring 22a has the spring force of about 20N to 60N.Because after the recoil of chain saw 36a operated, operating lever 58a swings towards Top carry handle 50a owing to the spring force of helix torsion spring 22a centers on rotation 20a at operating lever 58a.
If the executive component 80a of engaging means 54a is still by operator operation, then connection strap 64a since the spring force of helix torsion spring 22a with end face 74a press against executive component 80a on the side 76a of connection strap 64a.At this, conversion ratchet 66a remains on by in the mode of operation equally, makes brake apparatus 14a be closed.Therefore, energising again and the opening of brake apparatus 14a of motor 40a are prevented from.The operator must at first remove the power effect on engaging means 52a after operating lever 58a is triggered and after operating lever 58a resets, make operating lever 58a to reset in the initial position again through helix torsion spring 22a.At this, conversion ratchet 62a makes brake apparatus 14a be opened around an axis swing, and the spring element 70a of connection strap 64a moves among the dead slot 78a of executive component 80a of engaging means 54a (Fig. 3).
What can expect is, reset unit 16a has a delay unit 28a (shown in broken lines in the drawings), and this delay unit is set for and makes executive component 12a reset to time-delay (Fig. 3).This delay unit can or be realized by mechanical clock mechanism by electronic circuit.Electronic circuit can be triggered through the motion of operating lever 58a, and this mechanical clock mechanism can be for example be tightened only resetting of clockwork spring and operating lever 58a through motion and just is being released after at interval through preset time.Can expect that also reset unit 16a has a damping unit 30a (shown in broken lines in the drawings), it is set for and makes the executive component 12a dampened ground that constitutes operating lever 58a reset (Fig. 3).Can expect having in one direction the gas pressure damper (not shown at this) of idle running here, this gas pressure damper keeps the reset speed of operating lever 58a very little at operating lever 58a when application position resets to the initial position.Can expect constituting the damping element (not shown) of end-stop damper equally, be used for damping owing to pass through the caused backstop of spring force reset operation lever 58a of helix torsion spring 22a at this.
Hand held power machine brake operating device 10a also comprises a safe unit 32a, is used to avoid after by reset unit 16a reset operation element 12a, by mistake activate the hand held power machine 34a that constitutes chain saw 36a.The safe unit 32a that constitutes electric safety circuit 96a after operating lever 58a is triggered for the predetermined time interval, for example about power effect uncoupling that made engaging means 54a and operator in 5 seconds.This safety circuit 96a makes and passes through operation micro switch 72a keeps suppressing the switch loop in the predetermined time interval energising on this electricity ground and/or electronically with micro switch 72a disconnection from the switch loop of engaging means 54a.Can expect that also safe unit 28a additionally comprises a so-called conveyor trip switch 82a (shown in broken lines in Fig. 1), this conveyor trip switch must be by operator's operation to start chain saw 36a at trigger action lever 58a and after following reset operation lever 58a.The operation of conveyor trip switch 82a causes the response of starting chain saw 36a through the operator consciously, makes safety circuit 96a discharge again and connects switch 54a and can make chain saw 36a get into operation again.
Embodiment in conversion shown in Fig. 4 to 6.Basically indicate with identical Reference numeral on the parts that remain unchanged, characteristic and the functional principle.In order to distinguish these embodiment, add alphabetical a to d for the Reference numeral of these embodiment.Below explanation be limited to the difference with first embodiment in Fig. 1 to 3 basically, wherein, can be about the parts, characteristic and the function that remain unchanged referring to figs. 1 to the explanation of first embodiment in 3.
Fig. 4 illustrates the detail view of the hand held power machine brake operating device 10b of the reset unit 16b with conversion.This reset unit 16a has a back-moving spring 18b who constitutes tension spring 84b.But can expect that also back-moving spring 18b constitutes compression spring.Tension spring 84b releasably is connected with the executive component 12b that constitutes operating lever 58b through a first end 86b in the face of the executive component 12b of hand held power machine brake operating device 10b.In addition, tension spring 84b is through releasably being connected with spring acceptance division (not shown at this) in the interior zone of housing unit 38b with opposed another end of first end 86b 88b.Tension through tension spring 84b after the uncoupling that resets at the power on the operating lever 58b of this operating lever 58b realizes that this power is owing to the recoil of chain saw 36b acts on the operating lever 58b.Brake apparatus 14b and engaging means 54b by the triggering of operating lever 58b and the reset uncoupling that causes and/or the description of coupling and Fig. 1 to 3 realize similarly.
In addition, reset unit 16b has a damping unit 30b who has the damping element 94b that constitutes end-stop damper 98b.By this end-stop damper 98b can damping by make the reset backstop of caused operating lever 54b of operating lever 62b through tension spring 54.Therefore, damping unit 30b is set for the executive component 12b dampened ground that constitutes operating lever 58b is reset to the initial position from application position.
End-stop damper 98b constitutes the air pressure damper.But can expect that also the end-stop damper 98b personnel of possessing skills think significant other structure, for example elastomer backstop.About 15 ° angular range of this end-stop damper rotation from operating lever 58b around rotation 20b begins to be coupled with operating lever 58b.Operating lever 58b when application position moves to initial position from about 15 ° angular range begin by end-stop damper 98b catch with dampened move to the initial position.But what also can expect is that end-stop damper 98b has only direct backstop at operating lever 58b just to be coupled with operating lever 58b before.
Fig. 5 illustrates the detail view of the hand held power machine brake operating device 10c with reset unit 16c.This reset unit has the motor unit 24c that resets.This motor unit 24c that resets comprises a motor 26c.This motor unit 24c that resets also comprises a speed changer (not shown).This motor 26c is coupled by speed changer and operating lever 58c for the executive component 12c that constitutes operating lever 58c that drives hand held power machine brake operating device 10c.Speed changer can only have a gear (not shown at this) here, and this gear is rabbeted one in the tooth portion (not shown at this) that the rotation 20c of operating lever 58c is provided with.But also can expect, be provided with the decelerator and/or the speed increaser that are used for torque is delivered to from motor 26c operating lever 58c.In addition, reset unit 16c comprises control and/or regulon 90c, this control and/or regulon control and/or adjusting motor 26c.
At operating lever 58c because recoil after (Kick-Back) be triggered, with the explanation of Fig. 1 to 3 similarly, brake apparatus 14c be activated and micro switch 72c by uncoupling.Motor 26c and/or speed changer have idle running on the gyratory directions on the direction that triggers towards the operating lever 58c that is used to activate brake apparatus 14c; Make the friction in motor 26c and/or the speed changer keep very for a short time, this friction can be resisted the triggering of operating lever 58c.Operating lever 58c remains in the application position through motor 26c, and reset unit 16c comprises a delay unit 28c, and in a predetermined time interval of this delay unit, operating lever 58c remains in the application position in this time interval.What can expect is, this time interval presets or be provided with an interface when ex works, and this excuse allows the operator to mate according to own hope should the time interval.Delay unit 28c and control and/or regulon 90c electricity ground and/or coupling electronically.
Motor 26c controls through the signal of control and/or regulon 90c after this time interval of process and operating lever 58c is reset to the initial position from application position.Therefore, reset unit 16c resets to time-delay executive component 12c.If the executive component 80c of engaging means 54c is still by operator operation, so operating lever 58c only move until connection strap 64c backstop executive component 80c on the side 76c of connection strap 64c.For this reason, control and/or regulon 90c have a sensor (not shown at this), the backstop of this sensor sensing connection strap 64c.After executive component 80c and operator's power effect uncoupling, this uncoupling is through sensor sensing and control and/or regulon 90c control motor 26c reset operation lever 58c again, up to operating lever 58c in initial position.What can expect is, reset unit 16c additionally has a damping unit 30c (in Fig. 5, being represented by dotted lines), and this damping unit has a backstop buffering, in order to avoid the hard backstop of operating lever 58c when resetting to the initial position from application position.
In addition, hand held power machine brake operating device 10c has a safe unit 32c, is used to avoid after executive component 12c resets through reset unit 16c, activate unintentionally.Safe unit 32c electricity ground and/or be connected with control and/or regulon 90c electronically.Safe unit 32c blocks the operation again of the executive component 80c of engaging means 54c for predetermined time interval after operating lever 58c resets.
Fig. 6 illustrates the detail view of hand held power machine brake operating device 10d.Hand held power machine brake operating device 10d has a reset unit 16d.This reset unit 16d has a damping unit 30d, and this damping unit is set for the executive component 12d dampened ground that constitutes operating lever 58c of hand held power machine brake operating device 10d is reset to the initial position from application position.Damping unit 30d comprises a damping element 94d who constitutes gas pressure spring 92d.This gas pressure spring 92d has idle running on the direction of trigger action lever 58d with activation brake apparatus 14d.In addition, gas pressure spring 92d is connected with operating lever 58d in by the angular range of operating lever 58d process when moving to the initial position from application position whole.During operating lever 58d moves to initial position from application position, the motion of gas pressure spring 92d damping operating lever 58d.Therefore this operating lever 58d moves to the initial position from application position with little reset speed.Constitute operating lever 58d executive component 12d reset with brake apparatus 14d and engaging means 54d owing to the triggering of operating lever 58d and the reset uncoupling that causes and/or the description of coupling and Fig. 1 to 3 realize similarly.
Claims (10)
1. hand held power machine brake operating device; In particular for chain saw; Comprise that at least one is used to activate the executive component of a brake apparatus (14a-14d) (12a-12d); It is characterized in that, be provided with a reset unit (16a-16d), said reset unit is set for said executive component (12a-12d) is automatically resetted.
2. hand held power machine brake operating device according to claim 1 is characterized in that, said reset unit (16a; 16b) has at least one back-moving spring (18a; 18b; 18d).
3. hand held power machine brake operating device according to claim 2 is characterized in that, said back-moving spring (18a) is provided with around the rotation (20a) of said executive component (12a).
4. hand held power machine brake operating device according to claim 2 is characterized in that, said back-moving spring (18a) constitutes helix torsion spring (22a).
5. hand held power machine brake operating device according to claim 1 at least is characterized in that, said reset unit (16c) has at least one motor unit that resets (24c).
6. hand held power machine brake operating device according to claim 5 is characterized in that, the said motor unit that resets (24c) comprises at least one motor (26c).
7. according to each described hand held power machine brake operating device in the above claim; It is characterized in that; Said reset unit (16a-16d) has a delay unit (28a-28d), and said delay unit is set for said executive component (12a-12d) time-delay ground is resetted.
8. according to each described hand held power machine brake operating device in the above claim; It is characterized in that; Said reset unit (16a-16d) has a damping unit (30a-30d), and said damping unit is set for said executive component (12a-12d) dampened ground is resetted.
9. according to each described hand held power machine brake operating device in the above claim; It is characterized in that; Be provided with a safe unit (32a-32d), be used to avoid make said executive component (12a-12d) by mistake activate hand held power machine (34a) after resetting by said reset unit (16a-16d).
10. hand held power machine, especially chain saw have according to each described hand held power machine brake operating device in the above claim.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102010030918.4 | 2010-07-05 | ||
| DE201010030918 DE102010030918A1 (en) | 2010-07-05 | 2010-07-05 | Hand power tools brake actuator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102310233A true CN102310233A (en) | 2012-01-11 |
Family
ID=44675422
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101938063A Pending CN102310233A (en) | 2010-07-05 | 2011-07-05 | The hand held power machine brake operating device |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2404722A1 (en) |
| CN (1) | CN102310233A (en) |
| DE (1) | DE102010030918A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105127511B (en) * | 2015-09-08 | 2017-08-18 | 嘉兴百佳机械有限公司 | The supporting mechanism of brake connecting rod in a kind of brake device of electric chain saw |
| DE102019211894A1 (en) * | 2019-08-08 | 2021-02-11 | Robert Bosch Gmbh | Braking device of a chainsaw and method for protecting an operator |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4594780A (en) * | 1983-07-08 | 1986-06-17 | Andreas Stihl | Brake arrangement for a chain saw |
| JPH08336809A (en) * | 1995-04-11 | 1996-12-24 | Makita Corp | Brake device for chain saw |
| GB2426805A (en) * | 2005-06-01 | 2006-12-06 | Bosch Gmbh Robert | Handheld tool which cannot be switched on if the safety brakes are not functional or are worn |
| EP1749626A1 (en) * | 2005-08-02 | 2007-02-07 | Robert Bosch GmbH | Improvements in or relating to chainsaws |
| JP2010133532A (en) * | 2008-12-08 | 2010-06-17 | Husqvarna Zenoah Co Ltd | Braking device for chain saw, and chain saw |
-
2010
- 2010-07-05 DE DE201010030918 patent/DE102010030918A1/en not_active Withdrawn
-
2011
- 2011-05-09 EP EP11165218A patent/EP2404722A1/en not_active Withdrawn
- 2011-07-05 CN CN2011101938063A patent/CN102310233A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4594780A (en) * | 1983-07-08 | 1986-06-17 | Andreas Stihl | Brake arrangement for a chain saw |
| JPH08336809A (en) * | 1995-04-11 | 1996-12-24 | Makita Corp | Brake device for chain saw |
| GB2426805A (en) * | 2005-06-01 | 2006-12-06 | Bosch Gmbh Robert | Handheld tool which cannot be switched on if the safety brakes are not functional or are worn |
| EP1749626A1 (en) * | 2005-08-02 | 2007-02-07 | Robert Bosch GmbH | Improvements in or relating to chainsaws |
| JP2010133532A (en) * | 2008-12-08 | 2010-06-17 | Husqvarna Zenoah Co Ltd | Braking device for chain saw, and chain saw |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2404722A1 (en) | 2012-01-11 |
| DE102010030918A1 (en) | 2012-01-05 |
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Application publication date: 20120111 |