CN202228757U - Water-saving omnidirectional rotary adjusting valve and tap - Google Patents
Water-saving omnidirectional rotary adjusting valve and tap Download PDFInfo
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- CN202228757U CN202228757U CN2011203664896U CN201120366489U CN202228757U CN 202228757 U CN202228757 U CN 202228757U CN 2011203664896 U CN2011203664896 U CN 2011203664896U CN 201120366489 U CN201120366489 U CN 201120366489U CN 202228757 U CN202228757 U CN 202228757U
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Abstract
The utility model discloses a water-saving omnidirectional rotary adjusting valve and a tap. The water-saving omnidirectional rotary adjusting valve comprises a body (2) and a water outlet head (1) which are mutually connected, wherein the body (2) comprises an upper vertical part (21) and a lower horizontal part (24); a flange (22) for accommodating the tap or a water outlet of a water pipe is arranged at the top end of the vertical part (21); the flange (22) is provided with a water inlet (23); a ball intercepting part (25) is arranged at the free end part of the horizontal part (24) and an outlet (26) is arranged on the ball intercepting part (25); a main channel (27) for communicating the water inlet (23) with the outlet (26) is arranged in the body (2); and the water outlet head (1) can rotationally round the ball intercepting part (25). The utility model has the advantages of simple structure, convenience for use, the capability of providing omnidirectional rotary water, the realization of water conservation, wide applicability and reduced cost.
Description
Technical field
The present invention relates to the technical field of flowing water Valve and water tap, relate in particular to water saving omnirange rotation modulating valve and water tap that a kind of ability omnirange is rotated.
Background technique
Though freshwater resources crisis earth surface 2/3 is awash, 97% is the seawater that can't drink, is fresh water less than 3% only, wherein has 2% to seal up for safekeeping among polar glacier again.In only 1% fresh water, 25% is industrial water, and 70% is agricultural water, has only a part seldom can supply to drink and other life purposes.Yet in the world of such lack of water, water is but by a large amount of abuses, waste and pollution.In addition, area distribution is inhomogeneous, causes in the world the lack of water phenomenon very general, and global fresh water crisis is on the rise.More than 100 countries and regions lack of water in the world at present, wherein 28 countries are classified as the countries and regions of serious water shortage.Prediction was after 20～30 years, and the countries and regions of serious water shortage will reach 46～52, and lack of water population will reach 28～3,300,000,000 people.The north that China is vast and coastal area water resources wretched insufficiency, the northern China water deficient regions gross area reaches 580,000 square kilometres according to statistics.In more than 500 city, the whole nation, more than 300 urban water shortage arranged, annual water deficit reaches 58 billion cubic meters, and these lack of water cities mainly concentrate on North China, coastal and provincial capital, industrial city.
Because progress of modern technology and development, very big variation has also taken place in human living environment, people from before living environment to the living environment that is full of science and technology so far, be at a tremendous pace.Especially tap water is introduced huge numbers of families, and it is historical with well water to make that people drink river before having broken away from, but for the waste situation of tap water but relatively seriously, and some is that self custom causes; Some then is because the design of some hardware does not comply with one's wishes to be caused, and such as the design of running water pipe, opens the valve place from water outlet place hypertelorism; When the people washes one's hands, cause the waste of water resources easily, when washing one's face; The most frequently used water tap as shown in Figure 1 can be known, this water discharge of water faucet mouth down commonly used, and water is to dirty; When washing one's face, people need water receiving washes one's face from the water tap below with hand or towel, and the water-white of water tap runs off in vain when washing one's face; The serious waste that causes water, and when scouring of wool towel, towel etc., also can have similar problem.
In order to economize on water; People have found out various methods, are that 200820018679.7 Chinese utility model patent discloses a kind of self-pressure type water-saving tap such as application number, and application number is that 201020285909.3 Chinese utility model patent discloses a kind of folk art term position self closing water-saving tap etc.; These devices have all adopted complicated structure; Installation and maintenance is very loaded down with trivial details, and cost is higher, is difficult to be used more widely.
For this reason, artificer of the present invention is because above-mentioned defective through concentrating on studies and designing, comprehensively is engaged in for a long time the experience and the achievement of related industry for many years, and research and design goes out a kind of water saving omnirange and rotates modulating valve, to overcome above-mentioned defective.
Summary of the invention
The object of the present invention is to provide a kind of water saving omnirange to rotate modulating valve and water tap, it is simple in structure, and is easy to use; Can directly be installed on existing water tap or the water pipe, the water outlet that provides omnirange to rotate can effectively be economized on water; And applicability is wide, reduces cost.
For realizing above-mentioned purpose, the invention discloses a kind of water saving omnirange and rotate modulating valve, this modulating valve comprises body 2 and Water outlet 1, and body 2 interconnects with Water outlet 1, it is characterized in that:
Above-mentioned Water outlet 1 comprises the truncated cone portion 11 of top and the ball portion 13 of below, and the end of this truncated cone portion 11 has water outlet 12; Has annulus portion 14 on the side of this ball portion 13; This annulus portion 14 has inlet 16; Be provided with the subaisle 15 that is communicated with inlet 16 and water outlet 12 in the Water outlet 1; This subaisle 15 16 narrows down to water outlet 12 from entering the mouth gradually, have in the annulus portion 14 with body 2 on the sphere that matches of interception portion 25.
Wherein: on water outlet 12, be provided with one have a plurality of through holes outflow cover for water to form shower nozzle.
Wherein: also be provided with seal ring or gasket seal between interception portion 25 and the annulus portion 14 to strengthen its sealing effect.
Wherein: the upper end in the vertical portion of body is provided with the link that is connected with water tap; Annular recess is set on water tap; The lower end of link is fastened in flange 22, utilizes firm this water-saving valve is fixed on the water tap of link ability thereby the upper end is provided with the annular protrusion that extends internally.
Wherein: also be set to the structure of the belt portion of intercept sphere and built-in and the sphere that intercept sphere cooperatively interacts realizing 360 degree rotations of substantially horizontal, be set to the structure of the belt portion of intercept sphere and built-in and the sphere that intercept sphere cooperatively interacts at the vertical middle part of portion equally and spend with 360 of realization body self and rotate in the vertical joint of portion and horizontal part.
Wherein: at water inlet 23 places of body 2, its inner rim slopes inwardly gradually, and inwardly is provided with at least two installation steps from water inlet.
Wherein: on this inner edge, be provided with first installation step and second installation step, the diameter of first installation step is greater than second installation step, and the diameter of this first installation step is 24mm, and the diameter of this second installation step is 22mm.
Also disclose a kind of water saving omnirange and rotated water tap, body and Water outlet that this water tap comprises switch, water inlet and is positioned at the switch below is characterized in that:
Body is into 120 jiaos of J type bodies of arranging; Comprise the vertical portion on top and the horizontal part of bottom respectively, vertically the top of portion is positioned at the switch below, and the free end of horizontal part is provided with interception portion; Interception portion is provided with outlet; In body, have the main passage that is communicated with water inlet and outlet, this main passage narrows down to exporting from water inlet gradually, and Water outlet is rotating around above-mentioned interception portion;
Above-mentioned Water outlet comprises the truncated cone portion of top and the ball portion of below, and the end of this truncated cone portion has water outlet; Have annulus portion on the side of this ball portion, this annulus portion has inlet, is provided with the subaisle that is communicated with inlet and water outlet in the Water outlet, and this subaisle narrows down from entering the mouth to water outlet gradually, have in the annulus portion with body on the sphere that matches of interception portion.
Wherein: also be set to the structure of the belt portion of intercept sphere and built-in and the sphere that intercept sphere cooperatively interacts realizing 360 degree rotations of substantially horizontal, be set to the structure of the belt portion of intercept sphere and built-in and the sphere that intercept sphere cooperatively interacts at the vertical middle part of portion equally and spend with 360 of realization body self and rotate in the vertical joint of portion and horizontal part.
Also disclose a kind of water saving omnirange and rotated water tap; Directly set out head in the outlet port of horizontal water tap, each crooked place and the outlet port of Ц type water tap; Both this water tap Water outlets of comprising switch, water inlet and being positioned at outlet; Have the main passage that connects into the mouth of a river and outlet in the water tap, this main passage narrows down from water inlet to outlet gradually, it is characterized in that:
Above-mentioned Water outlet comprises the truncated cone portion of top and the ball portion of below, and the end of this truncated cone portion has water outlet; Have annulus portion on the side of this ball portion, this annulus portion has inlet, is provided with the subaisle that is communicated with inlet and water outlet in the Water outlet, and this subaisle narrows down from entering the mouth to water outlet gradually, have in the annulus portion with body on the sphere that matches of interception portion.
Through said structure, water saving omnirange of the present invention is rotated modulating valve and water tap has following technique effect:
1, rotatable rotation Water outlet makes upwards spray of water, people's operation such as just can directly wash one's face, and need not below water receiving, avoided the loss in vain of water, can realize the effect of economizing on water;
2, can adjust head in front and back,, guarantee to remain on basically about 90 degree, use more extensive to the angle of upper water-out to be suitable for the water tap of mounted different radians.
3, be provided with seal ring or gasket seal, to strengthen its sealing effect.
4, can realize comprehensive rotation on three different direction, people can arrange towards any direction, greatly facilitate people's use.
5, can cooperate the water tap of different size to use, thereby make things convenient for Applicable scope of the present invention, be beneficial to extensive use of the present invention.
6, in the device of the present invention, top and existing water tap then to locate caliber bigger, and water outlet place caliber is narrower, to realize forcing the purpose of water saving.
7, water outlet of the present invention place has designed the outer spacious hydrophthalmia that goes out, the water that makes ejection to around send forth, increased the effective utilization of unit bodies ponding, it is economized on water more.
The present invention will further describe in detail through following specific embodiment, and further combine will obtain knowing more and significantly understanding to the explanation of accompanying drawing.
Description of drawings
Fig. 1 has shown water tap schematic representation of the prior art.
Fig. 2 has shown that the present invention's omnirange of economizing on water rotates the schematic perspective view of modulating valve.
Fig. 3 has shown that the present invention's omnirange of economizing on water rotates the detailed schematic of modulating valve.
Fig. 4 has shown that the present invention's omnirange of economizing on water rotates the sectional view of modulating valve.
Embodiment
Referring to Fig. 2, shown that the present invention's omnirange of economizing on water rotates the schematic perspective view of modulating valve, this modulating valve comprises body 2 and Water outlet 1, body 2 interconnects with Water outlet 1, Water outlet 1 can 360 degree rotations around about 2, also can before and after about 60 degree of horizontal sliding.
Referring to Fig. 3 and Fig. 4, clearerly shown concrete structure of the present invention, body 2 for prevent the right angle to the load-bearing of power on a point; Designed the J type body that roughly becomes 120 jiaos to arrange; To disperse the torsion of rotation, comprise the vertical portion 21 on top and the horizontal part 24 of bottom respectively, vertically the top of portion 21 is provided with the flange 22 that holds water tap or water pipe water outlet; Flange 22 is provided with water inlet 23; The free end of horizontal part 24 is provided with interception portion 25, and interception portion 25 is provided with outlet 26, in body 2, has the main passage 27 that is communicated with water inlet 23 and outlet 26; This main passage 27 26 narrows down from water inlet 23 to outlet gradually, and above-mentioned Water outlet 2 is rotating to be provided with around interception portion 25.
Wherein, above-mentioned Water outlet 1 comprises the truncated cone portion 11 of top and the ball portion 13 of below, and the end of this truncated cone portion 11 has water outlet 12; Current can flow out from the lid water outlet; Preferably, can on water outlet 12, be provided with one have a plurality of through holes outflow cover for water, can form shower nozzle thus; Have annulus portion 14 on the side of this ball portion 13, this annulus portion 14 has inlet 16, is provided with the subaisle 15 that is communicated with inlet 16 and water outlet 12 in the Water outlet 1, and this subaisle 15 16 narrows down to water outlet 12 from entering the mouth gradually; From wherein, in annulus portion 14, have with body 2 on the sphere that matches of interception portion 25, the position that the sphere of annulus portion 14 and interception portion 25 cooperate also is provided with seal washer or seal ring, guarantees that interception portion is in fixing and sealing; Thus, interception portion 25 can stretch in the annulus portion 14 of Water outlet 1, and because the cooperatively interacting of annulus portion and interception portion, Water outlet can rotate around interception portion; And in rotation process, the outlet of interception portion is positioned at the subaisle of Water outlet all the time, and current keep from the main passage to attaching passage with smooth outflow; Therefore, no matter be that Water outlet is turned to any position, current all can keep continuing pressure; Can be smoothly from the water outlet ejection, thus, when needs wash one's face or during scouring of wool towel; Can this Water outlet 1 be rotated to be illustrated orientation, make upwards spray of water, people's operation such as just can directly wash one's face; And need not below water receiving, avoided the loss in vain of water, can realize the effect of economizing on water.
Preferably, between the annulus portion 14 of the interception portion 25 of body 2 and Water outlet 1, also be provided with seal ring or gasket seal, to strengthen its sealing effect.
Preferably; Can the link that be connected with water tap be set in the upper end of the vertical portion 21 of body 2; For example through annular recess is set on the water tap; And the lower end of link is fastened in flange 22, and the upper end is provided with the annular protrusion that extends internally, thereby utilizes firm this water-saving valve is fixed on the water tap of link ability.
Preferably, can the link that be connected with water pipe be set in the upper end of the vertical portion 21 of body 2.
Preferably; Also can be set to the structure of the belt portion of intercept sphere and built-in and the sphere that intercept sphere cooperatively interacts in the joint of vertical portion and horizontal part, can realize 360 degree rotations of substantially horizontal thus, preferably; Also can be set to the structure of the belt portion of intercept sphere and built-in and the sphere that intercept sphere cooperatively interacts at the middle part of vertical portion equally; 360 degree rotations of body self can be realized thus,, the comprehensive rotation of modulating valve on three different direction can be realized through such setting; People can arrange water-saving valve towards any direction, greatly facilitate people's use.
Preferably, at water inlet 23 places of body 2, its inner rim slopes inwardly gradually; And inwardly be provided with at least two installation steps from water inlet, preferably, on this inner edge, be provided with first installation step and second installation step; The diameter of first installation step is greater than second installation step, and it is obvious that, also can below second installation step, be provided with the 3rd installation step and the 4th installation step or the like; Preferably; The diameter of this first installation step is 24mm, and the diameter of this second installation step is 22mm, and the outer diameter of this water inlet is 25mm.Through setting this at least two installation steps, can cooperate the water tap of different size, thereby make things convenient for the Applicable scope of modulating valve of the present invention, a modulating valve can cooperate the water tap of different size to be suitable for, and greatly facilitates extensive use of the present invention.
Wherein, the invention still further relates to a kind of water saving omnirange and rotate water tap, the flange that only needs traditional water tap to be substituted the water-saving valve of above-mentioned introduction gets final product; Both this water tap body and Water outlets of comprising switch, water inlet and being positioned at switch below; Body for prevent the right angle to the load-bearing of power on a point, designed the J type body that roughly becomes 120 jiaos to arrange, to disperse the torsion of rotation; Comprise the vertical portion on top and the horizontal part of bottom respectively; Vertically the top of portion is positioned at the switch below, and the structure of horizontal part is identical with above-mentioned explanation, and Water outlet is also identical with above-mentioned explanation.
Preferably, between the annulus portion of the interception portion of body and Water outlet, also be provided with seal ring or gasket seal, to strengthen its sealing effect.
Preferably; Also can be set to the structure of the belt portion of intercept sphere and built-in and the sphere that intercept sphere cooperatively interacts in the joint of vertical portion and horizontal part, can realize 360 degree rotations of substantially horizontal thus, preferably; Also can be set to the structure of the belt portion of intercept sphere and built-in and the sphere that intercept sphere cooperatively interacts at the middle part of vertical portion equally; 360 degree rotations of body self can be realized thus,, the comprehensive rotation of water tap on three different direction can be realized through such setting; People can arrange water tap towards any direction, greatly facilitate people's use.
Wherein, The invention still further relates to a kind of water saving omnirange and rotate water tap; Directly set out head at outlet port, the Ц type tap outlet place of horizontal water tap, both this water tap Water outlet of comprising switch, water inlet and being positioned at outlet had the main passage that connects into the mouth of a river and outlet in the water tap; This main passage narrows down from water inlet to outlet gradually; This water outlet place is provided with interception portion, and Water outlet is identical with above-mentioned explanation, and the cooperation that interception portion and annulus portion also can be set in each bending place of Ц type water tap is to form one or more movable position in each bending place.
This shows, the invention has the advantages that:
1, rotatable rotation Water outlet makes upwards spray of water, people's operation such as just can directly wash one's face, and need not below water receiving, avoided the loss in vain of water, can realize the effect of economizing on water;
2, can adjust head in front and back,, guarantee to remain on basically about 90 degree, use more extensive to the angle of upper water-out to be suitable for the water tap of mounted different radians.
3, be provided with seal ring or gasket seal, to strengthen its sealing effect.
4, can realize comprehensive rotation on three different direction, people can arrange towards any direction, greatly facilitate people's use.
5, can cooperate the water tap of different size to use, thereby make things convenient for Applicable scope of the present invention, be beneficial to extensive use of the present invention.
6, in the device of the present invention, top and existing water tap then to locate caliber bigger, and water outlet place caliber is narrower, to realize forcing the purpose of water saving.
7, water outlet of the present invention place has designed the outer spacious hydrophthalmia that goes out, the water that makes ejection to around send forth, increased the effective utilization of unit bodies ponding, it is economized on water more.
It is obvious that, and above description and record only are for example rather than in order to limit disclosure of the present invention, application or use.Though described and be described in the drawings embodiment in an embodiment; But the optimal mode that the present invention does not limit by the accompanying drawing example and the conduct of describing is in an embodiment thought at present is with the specific examples of the instruction of embodiment of the present invention, and scope of the present invention will comprise any embodiment of the specification that falls into the front and appended claim.
Claims (10)
1. a water saving omnirange is rotated modulating valve, and this modulating valve comprises body (2) and Water outlet (1), and body (2) and Water outlet (1) interconnect, and it is characterized in that:
Body (2) is into 120 jiaos of J type bodies of arranging; Comprise the vertical portion (21) on top and the horizontal part (24) of bottom; Vertically the top of portion (21) is provided with the flange (22) that holds water tap or water pipe water outlet, and flange (22) is provided with water inlet (23), and the free end of horizontal part (24) is provided with interception portion (25); Interception portion (25) is provided with outlet (26); In body (2), have the main passage (27) of connection water inlet (23) and outlet (26), this main passage (27) narrow down to outlet (26) from water inlet (23) gradually, and Water outlet (1) is rotating around above-mentioned interception portion (25);
Above-mentioned Water outlet (1) comprises the truncated cone portion (11) of top and the ball portion (13) of below, and the end of this truncated cone portion (11) has water outlet (12); Has annulus portion (14) on the side of this ball portion (13); This annulus portion (14) has inlet (16); Be provided with the subaisle (15) that is communicated with inlet (16) and water outlet (12) in the Water outlet (1); This subaisle (15) narrows down from inlet (16) to water outlet (12) gradually, have in the annulus portion (14) with body (2) on the sphere that matches of interception portion (25).
2. water saving omnirange as claimed in claim 1 is rotated modulating valve, it is characterized in that: on water outlet (12), be provided with one have a plurality of through holes outflow cover for water to form shower nozzle.
3. water saving omnirange as claimed in claim 1 is rotated modulating valve, it is characterized in that: also be provided with seal ring or gasket seal between interception portion (25) and the annulus portion (14) to strengthen its sealing effect.
4. water saving omnirange as claimed in claim 1 is rotated modulating valve; It is characterized in that: the upper end in the vertical portion of body is provided with the link that is connected with water tap; Annular recess is set on water tap; The lower end of link is fastened in flange (22), utilizes firm this water-saving valve is fixed on the water tap of link ability thereby the upper end is provided with the annular protrusion that extends internally.
5. rotate modulating valve like arbitrary described water saving omnirange in the claim 1 to 4; It is characterized in that: also be set to the structure of the belt portion of intercept sphere and built-in and the sphere that intercept sphere cooperatively interacts realizing 360 degree rotations of substantially horizontal, be set to the structure of the belt portion of intercept sphere and built-in and the sphere that intercept sphere cooperatively interacts at the vertical middle part of portion equally and spend with 360 of realization body self and rotate in the vertical joint of portion and horizontal part.
6. rotate modulating valve like arbitrary described water saving omnirange in the claim 1 to 4, it is characterized in that: the water inlet (23) in body (2) is located, and its inner rim slopes inwardly gradually, and inwardly is provided with at least two installation steps from water inlet.
7. water saving omnirange as claimed in claim 6 is rotated modulating valve; It is characterized in that: on this inner edge, be provided with first installation step and second installation step; The diameter of first installation step is greater than second installation step; The diameter of this first installation step is 24mm, and the diameter of this second installation step is 22mm.
8. a water saving omnirange is rotated water tap, and body and Water outlet that this water tap comprises switch, water inlet and is positioned at the switch below is characterized in that:
Body is into 120 jiaos of J type bodies of arranging; Comprise the vertical portion on top and the horizontal part of bottom respectively, vertically the top of portion is positioned at the switch below, and the free end of horizontal part is provided with interception portion; Interception portion is provided with outlet; In body, have the main passage that is communicated with water inlet and outlet, this main passage narrows down to exporting from water inlet gradually, and Water outlet is rotating around above-mentioned interception portion;
Above-mentioned Water outlet comprises the truncated cone portion of top and the ball portion of below, and the end of this truncated cone portion has water outlet; Have annulus portion on the side of this ball portion, this annulus portion has inlet, is provided with the subaisle that is communicated with inlet and water outlet in the Water outlet, and this subaisle narrows down from entering the mouth to water outlet gradually, have in the annulus portion with body on the sphere that matches of interception portion.
9. water saving omnirange as claimed in claim 8 is rotated water tap; It is characterized in that: also be set to the structure of the belt portion of intercept sphere and built-in and the sphere that intercept sphere cooperatively interacts realizing 360 degree rotations of substantially horizontal, be set to the structure of the belt portion of intercept sphere and built-in and the sphere that intercept sphere cooperatively interacts at the vertical middle part of portion equally and spend with 360 of realization body self and rotate in the vertical joint of portion and horizontal part.
10. a water saving omnirange is rotated water tap; Directly set out head in the outlet port of horizontal water tap, each crooked place and the outlet port of Ц type water tap; Both this water tap Water outlets of comprising switch, water inlet and being positioned at outlet; Have the main passage that connects into the mouth of a river and outlet in the water tap, this main passage narrows down from water inlet to outlet gradually, it is characterized in that:
Above-mentioned Water outlet comprises the truncated cone portion of top and the ball portion of below, and the end of this truncated cone portion has water outlet; Have annulus portion on the side of this ball portion, this annulus portion has inlet, is provided with the subaisle that is communicated with inlet and water outlet in the Water outlet, and this subaisle narrows down from entering the mouth to water outlet gradually, have in the annulus portion with body on the sphere that matches of interception portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203664896U CN202228757U (en) | 2011-09-29 | 2011-09-29 | Water-saving omnidirectional rotary adjusting valve and tap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203664896U CN202228757U (en) | 2011-09-29 | 2011-09-29 | Water-saving omnidirectional rotary adjusting valve and tap |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202228757U true CN202228757U (en) | 2012-05-23 |
Family
ID=46079343
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203664896U Expired - Fee Related CN202228757U (en) | 2011-09-29 | 2011-09-29 | Water-saving omnidirectional rotary adjusting valve and tap |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202228757U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104653838A (en) * | 2015-02-16 | 2015-05-27 | 张超 | Water tap and water outlet pipe thereof |
-
2011
- 2011-09-29 CN CN2011203664896U patent/CN202228757U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104653838A (en) * | 2015-02-16 | 2015-05-27 | 张超 | Water tap and water outlet pipe thereof |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120523 Termination date: 20140929 |
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| EXPY | Termination of patent right or utility model |