CN201062192Y - Electric winch - Google Patents
Electric winch Download PDFInfo
- Publication number
- CN201062192Y CN201062192Y CNU2007201082822U CN200720108282U CN201062192Y CN 201062192 Y CN201062192 Y CN 201062192Y CN U2007201082822 U CNU2007201082822 U CN U2007201082822U CN 200720108282 U CN200720108282 U CN 200720108282U CN 201062192 Y CN201062192 Y CN 201062192Y
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- Prior art keywords
- axle
- sections
- brake
- rotating shaft
- cable pulley
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- 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
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- 230000005540 biological transmission Effects 0.000 claims abstract description 13
- 238000012546 transfer Methods 0.000 claims description 7
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 239000010949 copper Substances 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 230000008093 supporting effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 6
- 238000007906 compression Methods 0.000 description 5
- 230000006835 compression Effects 0.000 description 4
- 238000000354 decomposition reaction Methods 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000011295 pitch Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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Abstract
The utility model relates to a motor winch. The utility model comprises a left fixing base and a right fixing base, a cable pulley arranged between the fixing bases, a rotating connecting axle arranged inside the cable pulley and driven by a motor, a braking device is arranged on the connecting axle, the connecting axle is transmissively connected with the rotating axle, a plurality of axial teeth are arranged on the rotating axle, each of the axial tooth is geared with the corresponding epicyclic gear to drive the cable pulley to rotate in the positive direction and negative direction, and simultaneously a clutch device is arranged on the rotating axle. The utility model adopts the braking device and the clutch device with modified structures, the braking device adopts a flexible brake disk and a retaining piece, the braking process is realized through the rotating and the pushing between a group of wedge shape blocks A and the corresponding wedge shape blocks B inter-arranged through a cam surface, the stability of braking is enhanced, the working pieces wearing of the original braking device caused by the friction between hard pieces is reduced, simultaneously the clutching process can be realized by rotating the handle manually, pushing the rotating base and the rotating axle to move in the axial direction, to disengage the gearing between the axial teeth and the planetary gears and to suspend the power transmission, therefore, the process of the parts is simpler, the production cost is efficiently reduced, and the market demand is completely met.
Description
Technical field
The utility model relates to a kind of electric winch with brake and arrangement of clutch.
Background technology
Electric winch is to utilize the receipts that are wrapped in the cable wire on the cable pulley, put and spur article, for convenience cable wire is hooked on the article, mostly be provided with arrangement of clutch on the electric winch, pull out cable wire to make things convenient for the direct hand rotation cable pulley of user, also in coiling process,, the motor outage causes the danger of cable wire stall in addition because taking place suddenly for fear of cable wire, so on adapter shaft, also be provided with the brake gear of safety guard-safeguard, the structure of this class electric winch generally includes left and right sides permanent seat, cable pulley, rotating shaft, adapter shaft, brake gear on the adapter shaft, arrangement of clutch in the rotating shaft etc., power inputs to adapter shaft and rotating shaft by motor, and carry out positive and negative rotation by intermeshing axle tooth in the rotating shaft and planetary wheel drive cable pulley, wherein arrangement of clutch may command motor shaft imput power passes to cable pulley; The stall of brake gear control linkage axle is with the safety of raising operation and the comfort feature of use.This electric winch can realize that quick clutch can realize quick brake again, very easy to use, but still have many defectives on its structure, for example the brake gear structural behaviour is relatively poor, and sharp usually employing metal and metallo-hard friction carry out drag, cause component wear easily, so service life is low, poor work stability influences its safety in utilization, and the parts machining process more complicated of arrangement of clutch, increase productive costs.
Summary of the invention
Technical problem to be solved in the utility model be to overcome the defective of prior art and provide structural good, the reliable operation of a kind of brake and arrangement of clutch, safe to use, processing technology is simple, productive costs is low, the electric winch of high life.
Technical matters of the present utility model is achieved through the following technical solutions:
A kind of electric winch, comprise left and right sides permanent seat, be provided with the cable pulley of two ends between the permanent seat with the lining supporting, be provided with in the cable pulley by the motor-driven rotary connecting shaft, this adapter shaft is in transmission connection with rotating shaft again, rotating shaft is provided with a plurality of teeth, each tooth and the engagement of cooresponding planetary wheel, and the engagement of passing through in the planetary wheel large internal gear is rotated to drive the positive and negative rotation of cable pulley; Described adapter shaft is provided with brake gear; Described rotating shaft is provided with arrangement of clutch, it is characterized in that:
A, described brake gear comprise the brake mount that is in transmission connection with motor shaft, be provided with wedge type block A and wedge type block B equipped with camming surface and that rotated by the brake mount drive in this brake mount, wedge type block A is with its internal gearing adapter shaft external tooth, adjacent wedge type block B one side is provided with and is subjected to the volute spring pushing tow to carry out the brake facing and the brake plate of drag, and volute spring is contained between the wedge type block B and brake facing on the adapter shaft;
B, described arrangement of clutch comprise the clutch base that is fixed on the permanent seat, the bottom surface of clutch base is the convex configuration that height rises and falls, convex surface is provided with the retaining point, be rotatablely equipped with the power-transfer clutch handle on the clutch base, the handle end face extends disjunctor fork pin, be provided with the rotary seat that is subjected to hand fork pin rotation drive in the clutch base, the outer circumference surface of this rotary seat is provided with two and promoted by the convex surface of clutch base, and by the symmetrical projection of retaining point rotary spacing; Rotating shaft between the described adjacent shaft tooth is provided with clasp II and the copper washer with the rotating shaft snapping.
Described a plurality of teeth are the one section axle tooth that is sleeved on three sections axle teeth in the rotating shaft, two sections axle teeth and the rotating shaft that is in transmission connection, one section planetary wheel of corresponding one section axle tooth engagement, two sections planetary wheels of two sections axle teeth engagements, three sections planetary wheels of three sections axle teeth engagements; Between one section planetary wheel and two sections axle teeth, be provided with between one-level driver blade, two sections planetary wheels and three sections axle teeth simultaneously and be provided with the secondary driver blade; Described three sections planetary wheels are located on the cable pulley.
Be provided with axle bush between described three sections planetary wheels and the cable pulley, this axle bush is located on the disjunctor gear wheel shaft of cable pulley.
Be provided with friction shoe between described rotary seat bottom and the roller end.
Compared with prior art, the utility model has adopted improved brake gear of structure and arrangement of clutch, brake gear adopts flexible brake facing and brake plate, by one group of rotary lifting with the mutual relative wedge type block B of wedge type block A that is equipped with of camming surface, promote brake facing and brake plate and be adjacent to the realization brake, reduce in original brake gear component wear hard and that hard friction causes, increase the service life, simultaneously on the basis that does not influence arrangement of clutch stability in use and safety, only need rotating handles promotion rotary seat and rotating shaft to move axially, the engagement that breaks away between axle tooth and the planetary wheel can be carried out the clutch process, simplified parts machining process, effectively reduce production costs, fully meet the need of market.
Description of drawings
Fig. 1 is the utility model sectional structure scheme drawing.
Fig. 2 is adapter shaft and goes up set part decomposition texture scheme drawing.
Fig. 3 is for rotating shaft and go up set part decomposition texture scheme drawing.
Fig. 4 is the brake structure scheme drawing of brake gear.
Fig. 5 is in the position view of braking state at brake gear for wedge type block A and wedge type block B.
Fig. 6 is the structural representation of brake gear when the adapter shaft conter clockwise turns round.
Fig. 7 is wedge type block A and the site plan of wedge type block B when the brake gear conter clockwise turns round.
Fig. 8 is the structural representation of brake gear when the adapter shaft cw turns round.
Fig. 9 is wedge type block A and the site plan of wedge type block B when the brake gear cw turns round.
Figure 10 is the structural representation of brake gear from brake to running.
Figure 11 is that wedge type block A and wedge type block B are in from brake to the site plan that turns round at brake gear.
The structural representation that Figure 12 is a power-transfer clutch under clutch state not.
Figure 13 is the structural representation of power-transfer clutch under clutch state.
The specific embodiment
To elaborate again to the utility model embodiment by above-mentioned accompanying drawing below.
As Fig. 1～shown in Figure 13, the 1-permanent seat, the 2-lining, the 3-cable pulley, 4-wedge type block A, 5-wedge type block B, the 6-brake facing, the 7-brake plate, the little bearing of 8-, the 9-axle bush, three sections planetary wheels of 10-, 11-one-level driver blade, two sections planetary wheels of 12-, one section planetary wheel of 13-, the big socket head cap screw of 14-, the 15-clutch base, the 16-handle, the 17-friction shoe, 18-clasp I, the 19-rotary seat, one section axle tooth of 20-, the 21-fixed plate, the little socket head cap screw of 22-, two sections axle teeth of 23-, 24-clasp II, the 25-copper washer, three sections axle teeth of 26-, the 27-compression spring, the 28-rotating shaft, 29 connect axle, the 30-volute spring, the 31-brake mount, 32-clasp III, the 33-motor shaft, the 34-inner gear, 35-secondary driver blade, the 36-raised line, the 37-convex shoulder, the 38-internal tooth, the 39-external tooth, the 40-gear wheel shaft, 41-pitches pin, the 42-projection, the 43-convex surface, 44-keeps off point.
Electric winch, comprise two left and right sides permanent seats 1, be provided with the rotation cable pulley 3 of two ends between two permanent seats with lining 2 supportings, be provided with in the cable pulley by motor-driven rotary connecting shaft 29, adapter shaft is bearing on the little bearing 8, adapter shaft is provided with the brake gear that the stressed joint axle of stopping rotates, this brake gear such as Fig. 2, Fig. 4～shown in Figure 11, comprise with key, groove cooperates the cartridge type brake mount 31 of the motor shaft 33 that is in transmission connection, the brake mount inwall is provided with two symmetrical raised lines 36, be provided with in the brake mount with camming surface equipped mutually wedge type block A4 and wedge type block B5, the outer circumference surface of wedge type block A is provided with two symmetrical convex shoulders 37; Also be provided with two symmetrical convex shoulders on the outer circumference surface of wedge type block B5, with wedge type block A4 with camming surface after equipped the putting in place, the convex shoulder 37 of two wedge type blocks just is on the same straight line, be subjected to raised line 36 driven rotary of brake mount in the time of in the brake mount 31 of packing into, two wedge type blocks all have inner hole structure simultaneously, and also are provided with internal tooth 38 on the inner hole wall of wedge type block A.Adjacent wedge type block B5 one side is provided with and is subjected to volute spring 30 pushing tows to carry out the brake facing 6 and the brake plate 7 of drag, and brake facing and brake plate adopt flexible material to make, and to reduce component wear, improve brake stability when drag.Volute spring 30 is set between the wedge type block B5 and brake facing 6 on the adapter shaft 29, adapter shaft 29 1 ends are provided with external tooth 39, the other end is provided with interior hexagonal structure, end with external tooth 39 structures passes behind brake facing 6, brake plate 7 and equipped mutually wedge type block A4 and the wedge type block B5 by a pair of clasp III32 snapping, adapter shaft 29 meshes the internal tooth 38 of wedge type block A by external tooth 39 simultaneously, and is subjected to wedge type block A4 driven rotary.
Also be provided with the arrangement of clutch of gear mesh between clutch rotating shaft and the cable pulley 3 in the rotating shaft 28, this arrangement of clutch such as Figure 12～shown in Figure 13, comprise with big socket head cap screw 14 and be fixed on clutch base 15 on the permanent seat 1, the clutch base bottom surface is convex surface 43 structures that height rises and falls, be provided with retaining point 44 respectively at the highs and lows place of convex surface, clutch base is provided with the power-transfer clutch handle 16 that can manually rotate, the handle end face extends three disjunctor fork pin 41, the fork pin is provided with the clasp I18 of its snapping and breaks away from from clutch base 15 to prevent handle, be provided with the rotary seat 19 that is close on the convex surface in the clutch base, this rotary seat is plugged on the disjunctor fork pin 41 of handle and is subjected to its driven rotary, the outer circumference surface of rotary seat 19 is provided with two and promoted also by the symmetrical projection 42 of retaining point 44 rotary spacings by the convex surface 43 of clutch base 15, this limit method is when rotary seat is subjected to 150 ° of handle 16 driven rotary, projection just rises to whole convex surface 43 vertexs or whole convex surface nadir and is kept off point and block, and limits its further rotation.Also be provided with the wearing and tearing of friction shoe 17 when reducing mutual rotate between rotary seat 19 bottoms and rotating shaft 28 ends, simultaneously between two sections axle teeth 23 and three sections axle teeth 26, also be provided with clasp II24 and the copper washer 25 that snaps onto in the rotating shaft 28, rotary seat 19 promotes rotating shaft, and can promote by compression through the clasp II of snapping that three sections axle teeth 26 of spring 27 pushing tows move, and disengaging secondary driver blade 35, axle tooth and planetary wheel that clutch is meshed, middle breakage rotating shaft imput power passes to cable pulley 3.
When the utility model uses, starter motor, positive and negative motor shaft 33 by motor drives brake mount 31 rotations, and the wedge type block A4 and the wedge type block B5 that are located in the brake mount by the brake mount drive rotate, wedge type block A drives adapter shaft 29 by internal tooth 38 and rotates, adapter shaft rotates by one section axle tooth 20 that interior hexagonal structure drives in rotating shaft 28 and the rotating shaft, this moment power import intermeshing one section axle tooth with one section planetary wheel 13 after the one-level driver blade 11 intermeshing two sections axle teeth 23 of arrival and two sections planetary wheels 12, arrive intermeshing three sections axle teeth 26 and three sections planetary wheels 10 by secondary driver blade 35 again, when three sections planetary wheels under the dynamic action during around inner gear 34 rotation, can drive cable pulley 3 and carry out positive and negative rotation, thereby carry out the receipts of steel cable on cable pulley, put the pulling article.
Brake gear working process such as Fig. 4～shown in Figure 11, behind the disable motor, because effect of inertia causes the rotating speed of the wedge type block A4 of rotation and wedge type block B5 inconsistent, make the camming surface cooperation position of the camming surface disengaging wedge type block B5 of wedge type block A4, thereby promote wedge type block B5 extruding brake facing 6 and brake plate 7, be attached to when the tightest at brake facing and brake plate, adapter shaft 29 by inside and outside tooth engagement transferring power is promptly locked, reach the purpose of drag, Fig. 4, Figure 5 shows that brake gear is in the tightest view of brake; Fig. 6, Figure 7 shows that the site plan of brake gear wedge type block A and wedge type block B when motor shaft rotates counterclockwise; Fig. 8, Figure 9 shows that the site plan of brake gear wedge type block A and wedge type block B when motor shaft clockwise rotates.Can be when restarting motor disengaging brake as Figure 10, shown in Figure 11, this moment, the camming surface of wedge type block A4 and wedge type block B5 came back to equipped position, under volute spring 30 elastic force effects, the plane that promotes wedge type block B5 breaks away from brake facing 6 and brake plate 7, and cable pulley 3 can not have the brake rotating.
The working process of arrangement of clutch such as Figure 12～shown in Figure 13, clickwise power-transfer clutch handle 16, driven rotary seat 19 rotations under the effect of handle disjunctor fork pin 41, and the promotion rotary seat moves axially under height convex surface 43 effects of clutch base bottom surface, when rotating to 150 ° by retaining point 44 when spacing, two projections of rotary seat are in the convex surface vertex, this moment the shift length maximum, after axially movable rotary seat promotion rotating shaft is moved, the clasp II24 of snapping and copper washer 25 in rotating shaft, promoting three sections axle teeth 26 again overcomes compression spring 27 elastic force and moves, make three sections axle teeth break away from secondary driver blade 35, transmission of power interrupts, and cable pulley 3 can carry out M/C and rotate; When removing clutch state, 16 to 150 ° of left-hand revolution power-transfer clutch handles are spacing by the retaining point, under compression spring 27 elastic force effects, three sections axle teeth 26 mesh the secondary driver blade again, three sections planetary wheels 10, two sections planetary wheels 12, one section planetary wheel 13 reenter engage position, and rotating shaft 28 imput powers can drive cable pulley 3 again and realize rotatings.
Claims (4)
1. electric winch, comprise left and right sides permanent seat (1), be provided with the cable pulley (3) of two ends between the permanent seat with lining (2) supporting, be provided with in the cable pulley by motor-driven rotary connecting shaft (29), this adapter shaft is in transmission connection with rotating shaft (28) again, rotating shaft is provided with a plurality of teeth, each tooth and the engagement of cooresponding planetary wheel, and the engagement of passing through in the planetary wheel large internal gear is rotated to drive the positive and negative rotation of cable pulley (3); Described adapter shaft (29) is provided with brake gear; Described rotating shaft (28) is provided with arrangement of clutch, it is characterized in that:
A, described brake gear comprise the brake mount (31) that is in transmission connection with motor shaft (33), be provided with wedge type block A (4) and wedge type block B (5) equipped with camming surface and that rotated by the brake mount drive in this brake mount, wedge type block A with its internal tooth (38) be connected with a joggle the axle (29) external tooth (39), adjacent wedge type block B (5) one sides are provided with and are subjected to volute spring (30) pushing tow to carry out the brake facing (6) and the brake plate (7) of drag, and volute spring (30) is contained between the wedge type block B (5) and brake facing (6) on the adapter shaft (29);
B, described arrangement of clutch comprise the clutch base (15) that is fixed on the permanent seat (1), the bottom surface of clutch base is convex surface (43) structure that height rises and falls, convex surface is provided with retaining point (44), be rotatablely equipped with power-transfer clutch handle (16) on the clutch base (15), the handle end face extends disjunctor fork pin (41), be provided with the rotary seat (19) that is subjected to hand fork pin rotation drive in the clutch base, the outer circumference surface of this rotary seat is provided with two and promoted by the convex surface (43) of clutch base, and by the symmetrical projection (42) of retaining point (44) rotary spacing; Rotating shaft (28) between the described adjacent shaft tooth is provided with clasp II (24) and the copper washer (25) with the rotating shaft snapping.
2. electric winch according to claim 1, it is characterized in that described a plurality of teeth are for being sleeved on one section axle tooth (20) of three sections axle teeth (26), two sections axle teeth (23) and the rotating shaft that is in transmission connection in the rotating shaft (28), corresponding one section axle tooth engagement, one section planetary wheel (13), two sections axle tooth engagement two sections planetary wheels (12), three sections axle tooth engagement three sections planetary wheels (10); Simultaneously be provided with secondary driver blade (35) being provided with between one section planetary wheel and the two sections axle teeth (23) between one-level driver blade (11), two sections planetary wheels and the three sections axle teeth (26); Described three sections planetary wheels (10) are located on the cable pulley (3).
3. electric winch according to claim 2 is characterized in that being provided with axle bush (9) between described three sections planetary wheels (10) and the cable pulley (3), and this axle bush is located on the disjunctor gear wheel shaft (40) of cable pulley (3).
4. electric winch according to claim 1 is characterized in that being provided with friction shoe (17) between described rotary seat (19) bottom and rotating shaft (28) end.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201082822U CN201062192Y (en) | 2007-04-18 | 2007-04-18 | Electric winch |
| US12/377,696 US7823864B2 (en) | 2006-08-17 | 2007-08-13 | Plane braking device for electric winches and electric winch |
| EP07785324.0A EP2058268B1 (en) | 2006-08-17 | 2007-08-13 | Braking device with planar frictional surfaces for electric winch and electric winch |
| PCT/CN2007/002422 WO2008022544A1 (en) | 2006-08-17 | 2007-08-13 | Braking device with planar frictional surfaces for electric winch and electric winch |
| EP10192013A EP2292549B1 (en) | 2006-08-17 | 2007-08-13 | Electric winch with braking device and clutch device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201082822U CN201062192Y (en) | 2007-04-18 | 2007-04-18 | Electric winch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201062192Y true CN201062192Y (en) | 2008-05-21 |
Family
ID=39450561
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201082822U Expired - Lifetime CN201062192Y (en) | 2006-08-17 | 2007-04-18 | Electric winch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201062192Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102358585A (en) * | 2011-08-25 | 2012-02-22 | 沈佐华 | Built-in compact-typed winch transmission device |
| CN112279130A (en) * | 2019-11-07 | 2021-01-29 | 浙江润华机电有限公司 | Electric capstan device |
-
2007
- 2007-04-18 CN CNU2007201082822U patent/CN201062192Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102358585A (en) * | 2011-08-25 | 2012-02-22 | 沈佐华 | Built-in compact-typed winch transmission device |
| CN112279130A (en) * | 2019-11-07 | 2021-01-29 | 浙江润华机电有限公司 | Electric capstan device |
| CN112279130B (en) * | 2019-11-07 | 2021-11-12 | 浙江润华机电有限公司 | Electric capstan device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| C56 | Change in the name or address of the patentee |
Owner name: XIE YUZHI Free format text: FORMER NAME: CAO GUOXIANG |
|
| CB03 | Change of inventor or designer information |
Inventor after: Xie Yuzhi Inventor after: Cao Guoxiang Inventor before: Cao Guoxiang Inventor before: Xie Yuzhi |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: CAO GUOXIANG; XIE YUZHI TO: XIE YUZHI; CAO GUOXIANG |
|
| CP03 | Change of name, title or address |
Address after: An Shan Cun, Ningbo City, Zhejiang Province, Jiangbei District Hongtang Street postcode: 315033 Co-patentee after: Cao Guoxiang Patentee after: Xie Yu branch Address before: 3 floor, 127 Kangle street, Nei Hu, Taipei, Taiwan. Zip code: Co-patentee before: Xie Yuzhi Patentee before: Cao Guo Xiang |
|
| ASS | Succession or assignment of patent right |
Free format text: FORMER OWNER: CAO GUOXIANG Owner name: NINGBO KINGONE INDUSTRIAL CO., LTD. Free format text: FORMER OWNER: XIE YUZHI Effective date: 20110323 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20110323 Address after: An Shan village 315033 Zhejiang province Ningbo Jiangbei District Hongtang Street Patentee after: Ningbo Jiewang Electrical and Mechanical Co., Ltd. Address before: An Shan village 315033 Zhejiang province Ningbo Jiangbei District Hongtang Street Co-patentee before: Cao Guoxiang Patentee before: Xie Yuzhi |
|
| CX01 | Expiry of patent term |
Granted publication date: 20080521 |
|
| CX01 | Expiry of patent term |