CN201722753U - Water-saving flusher for toilet bowl - Google Patents
Water-saving flusher for toilet bowl Download PDFInfo
- Publication number
- CN201722753U CN201722753U CN2010201814057U CN201020181405U CN201722753U CN 201722753 U CN201722753 U CN 201722753U CN 2010201814057 U CN2010201814057 U CN 2010201814057U CN 201020181405 U CN201020181405 U CN 201020181405U CN 201722753 U CN201722753 U CN 201722753U
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- water
- saving device
- washing
- toilet
- bath
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- Expired - Fee Related
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/40—Protecting water resources
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- Sanitary Device For Flush Toilet (AREA)
Abstract
The utility model discloses a water-saving flusher for a toilet bowl, which comprises a water saving device and a controller. The water saving device mounted inside a water tank of the toilet bowl is used for being combined with pressurized valve or a connecting rod controlling opening and closing of a water outlet gate inside the water tank of the toilet bowl, the controller electrically connected with the water saving device determines execution strokes of non-action, flushing with a small amount of water or flushing with a large amount of water according to a preset time period, and the controller is provided with an infrared sensor used for sensing whether an object exists or not. The water-saving flusher is directly mounted inside the water tank of the toilet bowl without changing the structure in the water tank of the toilet bowl, and can effectively saves water.
Description
Technical field
The utility model relates to a kind of water saving fixtures, relates to a kind of toilet especially and uses the water-saving device, relate to particularly a kind ofly directly being installed in the water-closet tank, and do not change the water-closet tank inner structure, and effectively the toilet of the amount of conserving water with the water-saving device of washing by water.
Background technology
The tradition toilet structure mainly is to be provided with a water tank at the toilet rear, and be formed with the water district in toilet inside, and be connected with blow-off line, design by this, when the user behind the discharging dirt, press flush button control cistern water-discharging, to carry out flush action, make interior sewage of toilet and dirt reach the effect of flush toilet via discharging in the blow-off line.Yet, though traditional toilet of said structure can reach the effect of flush toilet, just press flush button when carrying out flush action as the user, the displacement that its water tank once uses, be after lasting till that all sewage in toilet internal memory pool and dirt discharge fully, just can stop the operation of washing by water, and not different because of situations such as trumpet or large sizes, causes water supply volume to heighten so water discharge time is long, water resource can't be utilized effectively and cause waste.
For solving a last problem, the existing dealer of industry provides the water-saving device of toilet special use, but, above-mentioned water-saving device mostly must vary to the internal construction of water tank when installing, cause suitable complexity of its erection procedure and layman to install or to keep in repair, and can't be applicable to the toilet of different kenels, practicality is lower, in addition, this class water-saving device mostly is manual control, so the water-saving effect is still limited.
The utility model content
The purpose of this utility model provides a kind of toilet water-saving water economizer, to solve the above-mentioned problems in the prior art.This kind toilet directly is installed in the water-closet tank with the water-saving water economizer, and does not change the water-closet tank inner structure, and the amount of conserving water effectively.
The utility model adopts following technical scheme:
Toilet is characterized in that comprising with the water-saving device of washing by water:
One in order to the control water-closet tank in the connecting rod of water outlet gate opening/closing or the water-saving device that the pressurized valve combines, it is installed in the water-closet tank;
One electrically connect with this water-saving device and according to the decision of Preset Time length carry out be failure to actuate, the controller of bath or the stroke of washing by water in a large number on a small quantity, it has an infrared inductor that whether has object to exist in order to induction.
In the embodiment that recommends, described water-saving device comprises one in order to stride a support bar and a pull bar of being located at formation suspention in the water-closet tank; This pull bar is provided with one in order to the horizontal shutting portion in conjunction with the able to turn on or off formula of support bar, and is installed with the vertical starting portion in order to combine with the connecting rod of water outlet gate opening/closing in the control water-closet tank in horizontal shutting subordinate side.
In the embodiment that recommends, described support bar has the kenel of freely stretching, and, path big by mutual fit and cross section be that the body of rod of hexagonal shape constitutes, and its two ends are arranged with a butting section, and are provided with a fixing button in large and small body of rod phase suit place.
In the embodiment that recommends, one end of described pull bar is provided with the horizontal shutting portion of described able to turn on or off formula, its medial surface is and is used for the firmly hexagonal shape of firm clamping of ramus anastomoticus strut one-tenth, and this horizontal shutting portion has an opening, and the dual-side correspondence of this opening is provided with protruding colluding and a latch closure.Can reach the sealing combination by solid protruding the colluding of latch closure cover when horizontal shutting portion opening is closed.
In the embodiment that recommends, be provided with a motor in the vertical starting portion of pull bar, and output power shaft connects a rotating shaft, this rotating shaft connection one exposes to the movable part of this vertical Actuator Division one side, this movable part one end is provided with in order to the motor location magnetic reed switch of reference point to be provided, and the other end is provided with the hang part that combines in order to the connecting rod of water outlet gate opening/closing in the control water-closet tank.
In the embodiment that recommends, described controller has a closure casing, be provided with the machine plate as main logic unit in this closure casing, and be connected with and comprise: an inductor, two is respectively applied for timer, the function setting button of at least one and the status indicator lamp of at least one of setting dissimilar timing numbers second.
In the embodiment that recommends, the function setting button of described controller includes little bath, big bath and urgent bath, and this little bath is the type that automatically performs by the control of machine plate with big bath, and this urgent bath then is a manual type.
In the embodiment that recommends, the status indicator lamp of described controller includes the startup indicator lamp, sets indicator lamp and low power supply indicator, and described controller connects the DC power supply, and in the utility model, this DC power supply can use the battery of replacement or chargeable pattern.
In the embodiment that recommends, described water-saving device comprises a pull bar, the one end is ㄇ shape structure with the cross section that combines by press button of pressing water-closet tank, be provided with a motor location magnetic reed switch and a motor in it, the output power shaft of motor connects a rotating shaft admittedly, this rotating shaft side face has box thread, and the inner face that coincide establishes the movable part that reverse male thread and cross section are the shape of falling ㄇ, and the free end of this movable part is provided with a sucker in order to the pressurized valve end face that adsorbs the pressing water-closet tank.
Unless specialize, the implication of employed here all technology and scientific terminology is identical with the affiliated common implication of understanding of technical field those skilled in the art of the utility model.Equally, all publication, patent application, patent and other references all can be introduced the utility model as a reference referred in this.
By above-mentioned description to the utility model structure as can be known, compare, the utlity model has following advantage with prior art:
1) can respond to by infrared inductor whether the object existence is arranged, and utilize inductor at the length of object life period as displacement according to (as be failure to actuate, the bath or the stroke of washing by water in a large number) on a small quantity, the displacement of water-closet tank can be classified effectively according to different purposes, also control draining automatically, effectively and significantly conserve water, to meet the target of energy conservation;
2) the direct utilization in this water-saving device bracing frame that can adjust length is installed in and forms the suspention kenel in the water-closet tank, as long as its movable part with automatic control displacement is combined with the connecting rod of controlling water outlet gate opening/closing in the water-closet tank is provided, just can directly control the closet flushing amount, install simple and easy effect and have, need not rely on the professional person just can install and use, can be suitable for water-closet tank dissimilar, size again.
Description of drawings
Fig. 1 is the overall structure figure of the closet flushing device of the utility model one preferred embodiment;
Fig. 2 is the fragmentary, perspective view of the closet flushing device of the utility model one preferred embodiment;
Fig. 3 is the controller outside drawing of the closet flushing device of the utility model one preferred embodiment;
Fig. 4 is the use flow chart of the closet flushing device of the utility model one preferred embodiment;
Fig. 5 is an A1 flow chart in the use flow process of closet flushing device of the utility model one preferred embodiment;
Fig. 6 is an A2 flow chart in the use flow process of closet flushing device of the utility model one preferred embodiment;
Fig. 7 is the action schematic diagram () of the closet flushing device of the utility model one preferred embodiment;
Fig. 8 is the action schematic diagram (two) of the closet flushing device of the utility model one preferred embodiment;
Fig. 9 is the partial structurtes and the action schematic diagram of the closet flushing device of another preferred embodiment of the utility model;
Wherein, the water-saving device 1, support bar 10, butting section 101, fixing button 102, pull bar 11, horizontal shutting portion 12, protrudingly collude 121, latch closure 122, vertical Actuator Division 13, motor 131, rotating shaft 132, movable part 133, motor location magnetic reed switch S1, hang part 134, controller 2, machine plate 20, inductor S 3, two timer T1, T2, function setting button SET, little bath SET1, big bath SET2, urgent bath SET3, status indicator lamp LED, start indicator lamp LED1, set indicator lamp LED2, low power supply indicator LED3, water-closet tank 3, connecting rod 31, press press button 40, pressurized valve 41, water-saving device 5, pull bar 51, motor 52, rotating shaft 521, movable part 53 and sucker 54
The specific embodiment
For further specifying the utility model, the specific embodiment of existing accompanying drawings preferred embodiment:
See also shown in Fig. 1 and Fig. 3, toilet of the present utility model comprises by a water-saving device 1 and a controller 2 and is formed with the water-saving device of washing by water.
Please continue and consult shown in Fig. 1 and Fig. 7, this water-saving device 1 directly is arranged in the water-closet tank 3, uses classification control water yield and reaches water-saving purpose and benefit; Its composition includes: one has the support bar 10 of the kenel of freely stretching, it is made of the body of rod that the large and small footpath and the cross section of mutual fit are the hexagonal shape, its two ends are arranged with a butting section 101, and be provided with a fixing button 102 in large and small body of rod phase suit place, in case can reach locating effect by this fixing button 102 of mat after being adjusted to appropriate length, therefore, it can be installed in the water-closet tank 3 of various sizes easily; One pull bar 11, the one end is provided with the horizontal shutting portion 12 of an able to turn on or off formula, but its inner face also is hexagonal shape ramus anastomoticus strut 10 forms firm firm clamping, this horizontal shutting portion 12 has an opening, the dual-side correspondence of this opening is provided with protruding 121 and one latch closure 122 that colludes, can mat latch closure 122 covers when making horizontal shutting portion 12 openings closed admittedly, protrudingly collude 121 and reach the sealing combination, be installed with vertical starting portion 13 again in horizontal shutting portion 12 belows, be provided with a motor 131 in it, and output power shaft connects a rotating shaft 132, these rotating shaft 132 connections one expose to the movable part 133 of these vertical Actuator Division 13 1 sides, these movable part 133 1 ends are provided with motor location magnetic reed switch S1, the other end is provided with the hang part 134 in order to the connecting rod 31 of water outlet gate opening/closing in the control water-closet tank 3, by above-mentioned structure, can drive rotating shaft 132 when starter 131 runnings rotates, and the related movable part 133 that makes produces displacement, and impel hang part 134 drive link 31 of synchronous shift to do swing, in order to control out the open and close of sluice gate.
See also shown in Figure 3, this controller 2 is done electric connection with water-saving device 1, it has a closure casing, in establish organic plates 20 (drawing does not show) as main logic unit, and be connected with and comprise: an inductor S3, two timer T1, T2, a plurality of function setting button SET and a plurality of status indicator lamp LED.This inductor S3 can be infrared inductor, has or not object to exist in order to induction to be provided; This two timer T1, T2 provide dissimilar default timing numbers second respectively, start distinct program with correspondence; These a plurality of function setting button SET include little bath SET1, wash by water SET2 and urgent bath SET3 greatly, and this little bath SET1 and big bath SET2 are the type that automatically performs by 20 controls of machine plate, and this SET3 that promptly washes by water then is a manual type; These a plurality of status indicator lamp LED then include startup indicator lamp LED1, set indicator lamp LED2 and low power supply indicator LED3, this startup indicator lamp LED1 is shinny to show normal holding state behind power turn-on, this sets indicator lamp LED2 is with flicker display setting mode state, provide two timer T1, T2 carries out the setting of different time length, then supply the electric weight deficiency with shinny demonstration equally as for this low power supply indicator LED3, the power supply supply should be in time changed in prompting, the power supply that this case controller 2 is used is DC, be the power supply source as the battery that can adopt replaceable or chargeable pattern, cause the situation that to use in the time of can avoiding because of power failure.
By above-mentioned structure, when setting up, form suspended state as long as water-saving device 1 is placed on the opening part of water-closet tank 3, the connecting rod 31 that then will control water outlet gate opening/closing in the water-closet tank 3 is placed on the movable part 133 1 end hang parts 134 of pull bar 11 1 sides, controller 2 being utilized bonding method to be fixedly arranged on the wall of toilet rear a little more than water-closet tank 3 sides gets final product again, do not need water-closet tank 3 interior structures are made any change, make installing process convenient simply again; Thus, just can as shown in Fig. 7 and Fig. 8, reach classification bath effect by the effect of controller 2 in use, and then reach the final purpose and the benefit of water-saving.
Setting means about this controller 2: pin little bath SET1 at first simultaneously, the SET2 button of washing by water continues to decontrol after 1～2 second greatly, set the indicator lamp LED2 expression of can glimmering and enter the setting mode state; Then pressing little bath SET1 button does not put, in order to set the timer T1 time, starter 131 is just changeing, decontrol little bath SET1 button up to adjusting to the proper operation time, motor 131 reverses immediately, magnetic reed switch S1 senses the location signal up to the motor location, the time that stops motor 131 action and store timer T1 simultaneously is a stroke A1, A1 stroke as shown in Figure 5: timer T1 actuating motor 131 is just changeing until timer T1 timing is finished, reverse motor 131 is up to the signal of receiving motor location magnetic reed switch S1 immediately, motor 131 stops action, is one stroke.
In like manner, pressing big bath SET2 button at the setting mode state does not put, to set the timer T2 time, starter 131 is just changeing, decontrol big bath SET2 button up to adjusting to the proper operation time, motor 131 reverses immediately, magnetic reed switch S1 senses the location signal up to the motor location, the time that stops motor 131 action and store timer T2 simultaneously is a stroke A2, A2 stroke as shown in Figure 6: timer T2 actuating motor 131 is just changeing until timer T2 timing is finished, reverse motor 131 is up to the signal of receiving motor location magnetic reed switch S1 immediately, motor 131 stops action, is one stroke.
The time of above-mentioned setting timer T1 can not surpass 20 seconds, if surpass 20 seconds by the little bath SET1 button time, can be classified as 20 seconds automatically; Equally, also can not surpass 20 seconds by the big bath SET2 button time, above also being classified as 20 seconds automatically.In addition, enter set mode state after whenever by once setting button, the setting pattern was left in setting-up time continuity 1 minute in one minute after no any button press.
About pattern of the present utility model, see also shown in Figure 4: when starting power supply, motor 131 can be positioned at magnetic reed switch S1 place, motor location, then utilize the inductor S3 of infrared rays to pick up counting in sensing the object existence, relatively the sensitive time starts action when object leaves, if the time of timing is less than 3 seconds, for being failure to actuate; Greater than 3 seconds to less than the A1 stroke that starts aforementioned functional in 3 minutes, timing time is greater than the A2 stroke that then started aforementioned functional in 3 minutes.
In addition, see also shown in Figure 9, another kind of water-saving device of the present utility model, it is for having the press type water closet of the large and small amount bath of manual control at another kind, because this water closet is a known structure, and can't make any change to the structure of this water closet after installing water-saving device of the present utility model, so please allow and omit and seldom do and give unnecessary details.And it on the implementation, be to be provided with the water-saving device 5 of another kenel between the pressurized valve 41 on the script water tank by press button 40 connections, the discharging quantity of water that pressurized valve 41 starts difference is controlled with automatic control mode in this water-saving device 5, replaces the mode of operation of pressing press button 40 with manually.The composition structure of this water-saving device 5 and aforementioned similar, except that part slightly variant and economize slightly the small part spare part in shape, its type of drive still as hereinbefore, include: a pull bar 51, be an end can with combine by press button 40 but do not have effect, this pull bar 51 is the structure kenel of ㄇ shape for the cross section, be provided with a motor location magnetic reed switch S1 and a motor 52 in it, the output power shaft of this motor 52 connects a rotating shaft 521 admittedly, these rotating shaft 521 side faces have box thread, and the inner face that coincide is established the movable part 53 that reverse male thread and cross section are the shape of falling ㄇ, this movable part 53 is also overlapped by pull bar 51 and covers, by this when motor 52 drives rotating shaft 521 rotations, 53 pairs of these rotating shafts 521 of this movable part are done relative helical rotation and are formed vertical displacement and stretch out, in like manner, when motor 52 counter-rotatings, this movable part 53 just can be withdrawn in vertical displacement, the free end of this movable part 53 is provided with a sucker 54 again, the end face of adsorbable pressurized valve 41, so, driving rotating shaft 521 when starter 52 runnings rotates, and relatedly movable part 53 is produced stretch out or the displacement of withdrawal, and pressurized valve 41 is done pressurization and displacement in various degree, control out the effect of sluice gate to reach segmentation, and then reach the final goal of water-saving.
The foregoing description is the utility model preferred implementation; but embodiment of the present utility model is not restricted to the described embodiments; other any do not deviate from change, the modification done under spiritual essence of the present utility model and the principle, substitutes, combination, simplify; all should be the substitute mode of equivalence, be included within the protection domain of the present utility model.
Claims (10)
1. toilet is characterized in that comprising with the water-saving device of washing by water:
One in order to the control water-closet tank in the connecting rod of water outlet gate opening/closing or the water-saving device that the pressurized valve combines, it is installed in the water-closet tank;
One electrically connect with this water-saving device and according to the decision of Preset Time length carry out be failure to actuate, the controller of bath or the stroke of washing by water in a large number on a small quantity, it has an infrared inductor that whether has object to exist in order to induction.
According to the toilet described in the claim 1 with the water-saving device of washing by water, it is characterized in that: described water-saving device comprises that one is located at a support bar and a pull bar that forms suspention in the water-closet tank in order to stride; This pull bar is provided with one in order to the horizontal shutting portion in conjunction with the able to turn on or off formula of support bar, and is installed with the vertical starting portion in order to combine with the connecting rod of water outlet gate opening/closing in the control water-closet tank in horizontal shutting subordinate side.
According to the toilet described in the claim 2 with the water-saving device of washing by water, it is characterized in that: described support bar has the kenel of freely stretching, and, path big by mutual fit and cross section are that the body of rod of hexagonal shape constitutes, its two ends are arranged with a butting section, and are provided with a fixing button in large and small body of rod phase suit place.
According to the toilet described in the claim 3 with the water-saving device of washing by water, it is characterized in that: an end of described pull bar is provided with the horizontal shutting portion of described able to turn on or off formula, its medial surface is and is used for the firmly hexagonal shape of firm clamping of ramus anastomoticus strut one-tenth, this horizontal shutting portion has an opening, and the dual-side correspondence of this opening is provided with protruding colluding and a latch closure.
According to the toilet described in the claim 2 with the water-saving device of washing by water, it is characterized in that: be provided with a motor in the vertical starting portion of pull bar, and output power shaft connects a rotating shaft, this rotating shaft connection one exposes to the movable part of this vertical Actuator Division one side, this movable part one end is provided with in order to the motor location magnetic reed switch of reference point to be provided, and the other end is provided with the hang part that combines in order to the connecting rod of water outlet gate opening/closing in the control water-closet tank.
According to the toilet described in the claim 1 with the water-saving device of washing by water, it is characterized in that: described controller has a closure casing, be provided with the machine plate as main logic unit in this closure casing, and be connected with and comprise: an inductor, two is respectively applied for timer, the function setting button of at least one and the status indicator lamp of at least one of setting dissimilar timing numbers second.
According to the toilet described in the claim 6 with the water-saving device of washing by water, it is characterized in that: the function setting button of described controller includes little bath, big bath and urgent bath, this little bath is the type that automatically performs by the control of machine plate with big bath, and this urgent bath then is a manual type.
According to the toilet described in the claim 6 with the water-saving device of washing by water, it is characterized in that: the status indicator lamp of described controller includes and starts indicator lamp, sets indicator lamp and low power supply indicator.
According to the toilet described in the claim 6 with the water-saving device of washing by water, it is characterized in that: described controller connects the DC power supply.
According to the toilet described in the claim 1 with the water-saving device of washing by water, it is characterized in that: described water-saving device comprises a pull bar, the one end is ㄇ shape structure with the cross section that combines by press button of pressing water-closet tank, be provided with a motor location magnetic reed switch and a motor in it, the output power shaft of motor connects a rotating shaft admittedly, this rotating shaft side face has box thread, and the inner face that coincide establishes the movable part that reverse male thread and cross section are the shape of falling ㄇ, and the free end of this movable part is provided with a sucker in order to the pressurized valve end face that adsorbs the pressing water-closet tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201814057U CN201722753U (en) | 2010-05-06 | 2010-05-06 | Water-saving flusher for toilet bowl |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201814057U CN201722753U (en) | 2010-05-06 | 2010-05-06 | Water-saving flusher for toilet bowl |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201722753U true CN201722753U (en) | 2011-01-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201814057U Expired - Fee Related CN201722753U (en) | 2010-05-06 | 2010-05-06 | Water-saving flusher for toilet bowl |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201722753U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102677757A (en) * | 2012-05-29 | 2012-09-19 | 钟杰荣 | Leakproof water-saving toilet |
| CN105089125A (en) * | 2015-08-19 | 2015-11-25 | 成霖企业股份有限公司 | Automatic flushing device used in closestool |
| CN105714894A (en) * | 2016-03-10 | 2016-06-29 | 苏州凯丰电子电器有限公司 | Automatic induction water flushing closestool |
| WO2024012077A1 (en) * | 2022-07-11 | 2024-01-18 | 中山东菱威力洁净科技有限公司 | Automatic flushing device of pull-cord-type toilet and pull-cord-type toilet |
-
2010
- 2010-05-06 CN CN2010201814057U patent/CN201722753U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102677757A (en) * | 2012-05-29 | 2012-09-19 | 钟杰荣 | Leakproof water-saving toilet |
| CN105089125A (en) * | 2015-08-19 | 2015-11-25 | 成霖企业股份有限公司 | Automatic flushing device used in closestool |
| CN105714894A (en) * | 2016-03-10 | 2016-06-29 | 苏州凯丰电子电器有限公司 | Automatic induction water flushing closestool |
| WO2024012077A1 (en) * | 2022-07-11 | 2024-01-18 | 中山东菱威力洁净科技有限公司 | Automatic flushing device of pull-cord-type toilet and pull-cord-type toilet |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: XIAMEN RSTO INTERACTION TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: LIU HUANZHONG Effective date: 20130906 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20130906 Address after: 361000, Fujian province Xiamen torch hi tech Zone (Xiangan) Industrial Zone Jianye Building, block A, room 901 and 903 Patentee after: Xiamen RSTO Co., Ltd. Address before: 361000 Fujian city of Xiamen province Rhine Jinshang Road No. 67 Jin Garden Patentee before: Liu Huanzhong |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110126 Termination date: 20160506 |
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| CF01 | Termination of patent right due to non-payment of annual fee |