CN1192954A - Hand-held electric tool, especially grinder - Google Patents
Hand-held electric tool, especially grinder Download PDFInfo
- Publication number
- CN1192954A CN1192954A CN98105951A CN98105951A CN1192954A CN 1192954 A CN1192954 A CN 1192954A CN 98105951 A CN98105951 A CN 98105951A CN 98105951 A CN98105951 A CN 98105951A CN 1192954 A CN1192954 A CN 1192954A
- Authority
- CN
- China
- Prior art keywords
- clamping body
- clamping
- abrasive sheet
- working plate
- held electric
- 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
- 239000000463 material Substances 0.000 claims abstract description 3
- 238000005187 foaming Methods 0.000 claims description 8
- 230000007246 mechanism Effects 0.000 claims description 8
- 239000013536 elastomeric material Substances 0.000 claims description 4
- 238000005096 rolling process Methods 0.000 claims description 3
- 230000000750 progressive effect Effects 0.000 abstract 1
- 230000002349 favourable effect Effects 0.000 description 9
- 230000000694 effects Effects 0.000 description 5
- 230000033001 locomotion Effects 0.000 description 5
- 238000005452 bending Methods 0.000 description 3
- 244000137852 Petrea volubilis Species 0.000 description 2
- 208000037656 Respiratory Sounds Diseases 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000002788 crimping Methods 0.000 description 2
- 229910001651 emery Inorganic materials 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 238000007373 indentation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000003534 oscillatory effect Effects 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
- B24B23/04—Portable grinding machines, e.g. hand-guided; Accessories therefor with oscillating grinding tools; Accessories therefor
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Portable Power Tools In General (AREA)
Abstract
In an electric hand tool, in particular a sander, e.g. an orbital sander, having a motor-driven work plate (11) and clamping means (17) for firmly clamping on the work plate (11) an abrasive sheet (16) which overlaps the underside of the work plate (11), in order to achieve a permanently taut state of the abrasive sheet (16) at least one of the clamping bodies (18) which may be applied onto the sheet ends (161,162) is formed from elastically deformable material and in the manner of a roller and is disposed so as to be capable of swivelling about an eccentrically disposed swivelling axis (19). The eccentricity of the swivelling axis (19) and the contour of the clamping body (18) are so selected that, with progressive swivelling of the clamping body (18) in the direction of the clamping position, the pressure upon the abrasive sheet (16) increases.
Description
The present invention relates to a kind of the sort of hand held electric tool, particularly grinding tool such as oscillatory type super grinding grinding tool that is limited as claim 1 preorder.
In this hand-held grinding tool (DE-1938350A1), be suspended at movingly in the hand-held grinding tool housing working plate by transmission mechanism by motor-driven in certain plane with roughly linearly or curved slightly oscillating movement mode move.The abrasive sheet of abrasive sheet as being made of sand paper or emery cloth is housed on the working plate bottom side.Described abrasive sheet is after walking around the working plate edge of relative direction of vibration horizontal expansion, it so is tightened on the working plate upper surface by clamp mechanism, but promptly clamping body is pressed on the abrasive sheet outside that fills the grinding medium and abrasive sheet is compressed in the mode of power transmission in two sheet petiolareas of abrasive sheet and is resisted against on the working plate upper surface.
In such hand held electric tool, in order to obtain optimum working efficiency, abrasive sheet in the working plate zone, be tauted and abrasive sheet and working plate between the motion of the relative workpiece of not overslaugh of motion abrasive sheet be absolute important, this is because otherwise will obviously reduce the grinding efficiency of hand held electric tool.In most of the cases, to the user importantly as his abrasive sheet of can packing into neatly.But when carrying out work with this hand held electric tool, after clamping abrasive sheet in accordance with regulations, the abrasive sheet grip conditions is lax to some extent, thus must be often by unclamping clamp mechanism and straining abrasive sheet and clamp abrasive sheet once more.
Advantage with hand held electric tool of the present invention of claim 1 feature is: can realize the special geometry by the clamping body of elastomeric material (as elastomer) formation, on the one hand, abrasive sheet is fixed and transports by adjacent clamping body surface under the situation of tensioning slightly, on the other hand, abrasive sheet is fixed by the clamping body distortion that comes across the crimping between clamping body and the working plate and occur thus and friction in final clamping process and clamps.Strain and clamp abrasive sheet and produce the effect that compresses that strengthens gradually simultaneously around the rotation of the rotating shaft of its arranged off-centre by clamping body.So the abrasive particle of abrasive sheet further embeds in the elasticity clamping body securely along with compressing gradually.
When according to a preferred embodiment of the invention and to clamping body be furnished with two parallel clamping heads or the tension the time, the tension effect again of clamping body is strengthened.By being introduced, a cannelure formed described clamping head or tension head in the rolling body type clamping body.Described clamping head or tension head at first clamp the upper surface of the abrasive sheet of band grinding medium by means of temporarily pushing down abrasive sheet slightly, produce soft and indentation uniformly but should be careful this abrasive sheet.
Can make favourable improvement and development to the described hand held electric tool of claim 1 by the measure that other claim is mentioned.
According to a favourable embodiment of the present invention, be furnished with a recess that is opened on the working plate to clamping body with rounding shape, clamping body stretches in the described recess when changing its clamped position that clamps abrasive sheet over to.Strengthened compressing effect by this design, particularly be designed to spirality and clamping body profile when when clamping body rotates, overlapping gradually when the clamping body profile with the recess profile, all the more so.In addition, recess surface is level and smooth, thereby can guide abrasive sheet when straining abrasive sheet more well.
According to a favourable embodiment of the present invention, so clamping body and recess are arranged on the working plate upper surface, promptly when clamping abrasive sheet, the abrasive sheet end of walking around outer rim on the close working plate of recess is between recess and clamping body.Outer rim resembles under the opposed working plate and handles through rounding the outer rim on the working plate.Guaranteed that by such design abrasive sheet crackle can not occur when bending the working plate outer rim.Crackle may cause abrasive sheet to break earlier (theoretical breakaway poing) in grinding and be an impediment in the working plate district tightening abrasive sheet.Owing to the upper and lower outer rim of working plate is formed circle, so can tighten abrasive sheet well and the while is strained abrasive sheet once more by favourable mode.
According to a favourable embodiment of the present invention, clamping body is placed on the clamping bar, clamping bar one with bearing that rotating shaft is alignd in be rotatably supported on the working plate upper surface.The reed-type clamping bar is fastened to provide on the housing department of hand held electric tool of supporting working plate and to clamping body under pretightning force abrasive sheet is pressed against thrust required on the working plate.
According to a favourable embodiment of the present invention, clamping bar is a bar that curves an angle of 90 degrees, and clamping body takes shape on one of them lever arm by splash or foaming mode and a handle that is made of elastomeric material takes shape on another lever arm by splash or foaming mode.One of them lever arm is preferably in the clamping body splash zone or interior waveform or the meander-shaped of being curved in foaming district.
According to a favourable embodiment of the present invention, on working plate, so be provided for blocking the stopper rib of end rib of the horizontal expansion of abrasive sheet, promptly when the end rib of abrasive sheet is resisted against on one of them stopper rib, another sheet end enough clamps in abrasive sheet length under the situation of usefulness between clamping body and recess.
According to a favourable embodiment of the present invention, working plate is assembled by a vibration plate and the grinding plate that is fixed on the vibration plate that can do oscillating movement.Clamping body and recess are arranged on the vibration plate.Clamped abrasive sheet has covered the grinding plate bottom side.
Illustrated embodiment further describes the present invention in conjunction with the accompanying drawings in following specification.Wherein:
Fig. 1 shows a fragmentary, perspective view that is designed to the hand held electric tool of super grinding grinding tool.
Fig. 2 shows partly along the sectional drawing of II-II line among Fig. 1.
Fig. 3 shows the view resemble Fig. 2 under the situation of tensioning abrasive sheet.
Fig. 4 shows the front view of the clamping body that has the clamping bar that is used for the tensioning abrasive sheet.
The clamping body on the arrow V direction that Fig. 5 shows at Fig. 4 and the view of grab.
Fig. 6 shows the perspective view of the vibration plate of the super grinding grinding tool among Fig. 1-3.
Show a hand held electric tool in Fig. 1 partly, it is designed to the hand-held grinding tool by favourable mode, particularly the super grinding grinding tool.This hand held electric tool (below be called " super grinding grinding tool ") has a housing 10.But be placed on the housing working plate 11 elastic movements.One be placed in the housing 10 and in the described working plate vibration of this motor-driven that can't see.As Fig. 2,3 clear illustrating, working plate 11 is can be assembled into by vibration plate 12 and grinding plate 13 that releasably is fixed on the vibration plate by unshowned screw of motor-driven vibration by one.Grinding plate 13 has a upside bending resisting plate 14 and a lower side panel 15 of being made by soft material such as foamed plastics.Lower side panel 15 is connected securely with epipleural 14.Lower side panel 15 bottom sides have been covered as sand paper or emery cloth by an abrasive sheet 16, and abrasive sheet two ends 161,162 are walked around vibration plate 12 outer rims 121 of relative working plate 11 longitudinal axis horizontal expansions and grinding plate 13 outer rims 131 and clamped mechanism 17 and are clamped in securely on vibration plate 12 upper surfaces.
Clamp mechanism 17 (wherein only showing the clamp mechanism 17 that is used for a sheet end 161 in Fig. 1-3) has one and is designed to the rolling element shape and clamping body 18 that made by the elastic deformation material.Lift in order to press on sheet end 161,162 or from sheet end 161,162, clamping body 18 can rotate around the rotating shaft 19 of an arranged off-centre.Shown in Fig. 4,5, clamping body 18 is placed on the clamping bar 20 for this reason.Clamping bar is placed in the bearing 21,22 that aligns with rotating shaft 19 on vibration plate 12 upper surfaces rotationally.
In Fig. 4,5, show clamping bar 20 with two different views.Clamping bar 20 is bars of a crooked an angle of 90 degrees.On galianconism 231, formed clamping body 18, and on long-armed 232, formed the handle 24 that constitutes by elastomeric material by foaming or splash mode by foaming or splash mode.In the splash zone or foaming district of clamping body, galianconism 231 is bent to waveform or meander-shaped, and this is the torque that appears at when clamping abrasive sheet 16 securely especially on the soft clip body 18 in order to bear.Introduce clamping bar 20 groove of bearing journal 211,212 or 221,222 end by and galianconism 231 that be in alignment with each other that stretch out from clamping body 18 both sides.Can when operating, make us cosily holding clamping bar 20 by handle 24.On the clamped position of clamping body 18, reed-type clamping bar 20 is tightened under pretightning force on the vibration plate 12, therefore as shown in Figure 1, is provided with grab 25 on vibration plate 12, and the clamping bar 20 that is in tensioned state on vibration plate 12 can be stuck in this grab.Second grab 25 that is used for fixing another clamping bar 20 of 16 of abrasive sheets end 162 is arranged on the opposition side of vibration plate 12 (can't see).
In Fig. 6, show the vibration plate 12 that has two bearings 21,22 that are used for two clamping bars 20 from the angle of having an X-rayed.Each bearing 21 or 22 is made of two bearing journals 211,212 or 221,222, and bearing journal has groove that be in alignment with each other, its cross section semicircular in shape and that be used to strain each clamping bar 20 respectively.
Shown in Fig. 2,3 sectional drawing, soft elasticity clamping body 18 has the spirality outline and has two parallel and elasticity tension head or clamping heads 27,28 that be separated from each other by cannelure 26, and the tight head of described folder (drawing) turns to towards abrasive sheet 16 on the position of clamping body 18.Clamping body 18 is equipped with a recess 29 that is opened on vibration plate 12 upper surfaces, and described recess has the rounding shape and preferably has the spill of roughly coincideing with clamping body 18 outlines.So clamping body 18 and recess 29 are arranged on vibration plate 12 upper surfaces, promptly when using abrasive sheet 16, the sheet end 161,162 of bending outer rim 121 on the vibration plate 12 is between clamping body 18 and recess 29.Figure 2 illustrates the clamping body 18 on the turned position, the abrasive sheet 16 of on this position, can packing into.In this case, grinding plate 13 bottom sides are positioned on the abrasive sheet 16, and two sheet ends 161,162 were bent the rounded outer edge 131,121 of grinding plate 13 and vibration plate 12 and stretched in the free space between clamping body 18 and vibration plate 12 upper surfaces.This stopper rib 30,31 stretching into part and stopper rib so is set as sheet end 161,162 for abrasive sheet 16 end rib settings, promptly when the end rib of 16 of abrasive sheets end 161/162 abuts on the described stopper rib 30,31, another sheet end 162/161 is enough to cover in abrasive sheet length under the situation of grinding plate 13 bottom sides between clamping body 18 and recess 29.Clamping body 18 rotates around the rotating shaft 19 of its arranged off-centre by clamping bar 18 once more, exactly, in Fig. 2, clockwise rotate and in Fig. 1, rotate counterclockwise, thereby clamping head 27,28 is clamped abrasive sheet 16, produce soft and uniform indentation but should be careful this abrasive sheet 16.Clamping body 18 further stretches in the recess 29 along with rotating, and the effect that compresses of abrasive sheet 16 is improved because of the spiral outline of clamping body 18 and the rounding shape of recess 29 in further tension process.Level and smooth recess 29 surfaces and the rounded outer edge 121,131 of vibration plate 12 and grinding plate 13 can allow Relative Oscillation plate 12 to guide abrasive sheet 16 well and prevent that abrasive sheet 16 from cracking.Because the abrasive particle of abrasive sheet 16 always embeds in the elasticity clamping body 18 securely along with the increase of pressure, so abrasive sheet 16 is tightened and can be by the fixing abrasive sheet reliably of the crimping between clamping body 18 and the recess 29 always.Because soft elasticity clamping body 18 deformables, so if tightening of abrasive sheet 16 with irrelevant, then thick, the thin abrasive sheet of thickness of abrasive sheet 16 all clamped securely and be fixed on the clamped position equally.
If clamping body 18 arrives its clamped position, then long-armed 232 of clamping bar 20 stretch in the grab 25.Crooked long-armed 232 by reed-type ground, thus long-armed 232 be fastened on vibration plate 12 and the grab 25, and clamping bar 20 abuts on the grab 25 thus under tightening state and can not unconsciously make clamping body 18 counter-rotatings.The clamped position of clamping body 18 figure 3 illustrates.Can be clear that 6 of abrasive sheets end 161 is fastened between the rounding shape of the outline of helical grip body 18 and recess 29.
20 of above-mentioned clamping bars have been furnished with a clamping body 18 and recess 29 just, and doing like this is a sheet end in the clamp clip end 161/162 in the above described manner.Another sheet end 162/161 can be fixed by another kind of mode such as common mode.In this case, also can obtain above-mentioned simple but guarantee the advantage of fixing with clamping effect.
Claims (10)
1, a kind of hand held electric tool, particularly grinding tool such as super grinding grinding tool, it has an abrasive sheet (16) that is used for covering working plate (11) bottom side by motor-driven working plate (11) and and is fastened on clamp mechanism (17) on the working plate (11), described clamp mechanism is at the sheet end (161 of abrasive sheet (16), 162) be provided with compressible clamping body (1 8), it is characterized in that, at least one clamping body (18) is made the rolling element shape by deformable material, go up and from then on lift on the sheet end in order to be placed on sheet end (161), described clamping body can rotate around the rotating shaft (19) of an arranged off-centre.
2, hand held electric tool as claimed in claim 1 is characterized in that, the degree of eccentricity of rotating shaft (19) is so to determine, promptly when clamping body (18) was placed on the sheet end (161), clamping body can flexibly be clamped.
3, hand held electric tool as claimed in claim 1 or 2 is characterized in that, clamping body (18) has the spirality outline.
4, as the described hand held electric tool of one of claim 1-3, it is characterized in that clamping body (18) has two parallel and elasticity tension head or clamping heads (27 that be separated from each other by a cannelure (26), 28), described clamping head turns on clamped position towards abrasive sheet (16).
5,, it is characterized in that attach troops to a unit one for clamping body (18) to be opened in the recess (29) on the working plate (11), when clamping body (18) turned to its clamped position, this clamping body stretched in the described recess as the described hand held electric tool of one of claim 1-4.
6, hand held electric tool as claimed in claim 5 is characterized in that, recess (29) has the rounding shape, and described shape spill best and clamping body (18) is roughly coincide.
7, as claim 5 or 6 described hand held electric tools, it is characterized in that, clamping body (18) and recess (29) are so to be arranged on working plate (11) upper surface, promptly when clamping abrasive sheet (16), the abrasive sheet sheet end (161) of walking around the last outer rim (121) of working plate (11) of close recess (29) is positioned between recess (29) and the clamping body (18), and the last outer rim (121) of working plate (12) is handled through rounding.
8, hand held electric tool as claimed in claim 7 is characterized in that, the following outer rim (131) of working plate (11) that is positioned at outer rim (121) opposite is preferably under the situation that clamps abrasive sheet (16) to be handled through rounding.
9, as the described hand held electric tool of one of claim 1-8, it is characterized in that, clamping body (18) is placed on the clamping bar (20), described clamping bar one with bearing (21) that rotating shaft (19) is alignd in be rotatably supported on working plate (11) upper surface, this clamping bar is preferably on the grab (25) that is stuck in working plate (11) under the pretightning force.
10, hand held electric tool as claimed in claim 9, it is characterized in that, clamping bar (20) is the bar of a crooked an angle of 90 degrees, upward formed clamping body (18) at an one lever arm (231), and upward formed a handle that constitutes by elastomeric material (24) by splash or foaming mode at its another lever arm (232) by splash or foaming mode.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19707737.4 | 1997-02-27 | ||
| DE19707737 | 1997-02-27 | ||
| DE19800044A DE19800044A1 (en) | 1997-02-27 | 1998-01-02 | Electric hand tools, in particular grinder |
| DE19800044.8 | 1998-01-02 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1192954A true CN1192954A (en) | 1998-09-16 |
| CN1081511C CN1081511C (en) | 2002-03-27 |
Family
ID=26034312
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98105951 Expired - Lifetime CN1081511C (en) | 1997-02-27 | 1998-02-27 | Hand-held electric tool, especially grinder |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN1081511C (en) |
| GB (1) | GB2322582B (en) |
| IT (1) | IT1298433B1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100371132C (en) * | 2002-07-16 | 2008-02-27 | 罗伯特·博世有限公司 | Manual sanding machine tool |
| CN1833823B (en) * | 2005-03-14 | 2010-05-12 | 奥尔威工具公司 | Sanding apparatus with molded elastomeric pad |
| CN1608799B (en) * | 2003-10-20 | 2010-09-01 | 罗伯特·博施有限公司 | Portable grinding machine |
| CN1572421B (en) * | 2003-05-26 | 2011-08-31 | 罗伯特·博施有限公司 | Portable grinding tool |
| CN101247924B (en) * | 2005-08-11 | 2012-07-11 | 3M创新有限公司 | Sanding tool with sheet loading feature |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10139548A1 (en) * | 2001-08-10 | 2003-02-20 | Bosch Gmbh Robert | Grinding tool machine has motor in housing, grinding disc held in holder by lever-clamps with clamping jaws at one end, swivel axle and two sets of clamps |
| DE10139547A1 (en) | 2001-08-10 | 2003-02-20 | Bosch Gmbh Robert | Grinding tool machine has clamps on opposite ends of grinding disc, holder, pincers with clamping jaws and swivel axle |
| DE10139546A1 (en) * | 2001-08-10 | 2003-02-20 | Bosch Gmbh Robert | Grinding tool machine has plate-type holder, clamps as lever with clamping jaw, swivel axle |
| DE10353682A1 (en) * | 2003-11-17 | 2005-06-16 | Robert Bosch Gmbh | Hand sanding tool |
| DE10361097A1 (en) * | 2003-12-22 | 2005-07-21 | Robert Bosch Gmbh | Hand tool |
| CN201493733U (en) * | 2009-08-03 | 2010-06-02 | 南京德朔实业有限公司 | Sanding machine |
| US20210308822A1 (en) * | 2018-08-06 | 2021-10-07 | Temple Allen Holdings, Llc | Method and apparatus for abrading irregular surfaces |
| WO2023050451A1 (en) * | 2021-10-01 | 2023-04-06 | Techtronic Cordless Gp | Sander including sheet guide and clamp |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB600664A (en) * | 1944-12-20 | 1948-04-15 | Sterling Tool Products Company | Improvements in or relating to rubbing pads for holding a strip of polishing or abrasive material |
| NL14509C (en) * | 1922-07-21 | |||
| DE4037266A1 (en) * | 1990-11-23 | 1992-05-27 | Bosch Gmbh Robert | DEVICE FOR TENSIONING ABRASIVE PAPER ON AN ORBITAL SANDER |
-
1998
- 1998-02-20 IT ITMI980339 patent/IT1298433B1/en active IP Right Grant
- 1998-02-25 GB GB9804029A patent/GB2322582B/en not_active Expired - Lifetime
- 1998-02-27 CN CN 98105951 patent/CN1081511C/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100371132C (en) * | 2002-07-16 | 2008-02-27 | 罗伯特·博世有限公司 | Manual sanding machine tool |
| CN1572421B (en) * | 2003-05-26 | 2011-08-31 | 罗伯特·博施有限公司 | Portable grinding tool |
| CN1608799B (en) * | 2003-10-20 | 2010-09-01 | 罗伯特·博施有限公司 | Portable grinding machine |
| CN1833823B (en) * | 2005-03-14 | 2010-05-12 | 奥尔威工具公司 | Sanding apparatus with molded elastomeric pad |
| CN101247924B (en) * | 2005-08-11 | 2012-07-11 | 3M创新有限公司 | Sanding tool with sheet loading feature |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2322582A (en) | 1998-09-02 |
| ITMI980339A1 (en) | 1999-08-20 |
| GB2322582B (en) | 1999-08-04 |
| CN1081511C (en) | 2002-03-27 |
| IT1298433B1 (en) | 2000-01-10 |
| GB9804029D0 (en) | 1998-04-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20020327 |
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| CX01 | Expiry of patent term |