CN100548498C - The distributor of atomization active material, system and using method thereof - Google Patents
The distributor of atomization active material, system and using method thereof Download PDFInfo
- Publication number
- CN100548498C CN100548498C CNB2006101212582A CN200610121258A CN100548498C CN 100548498 C CN100548498 C CN 100548498C CN B2006101212582 A CNB2006101212582 A CN B2006101212582A CN 200610121258 A CN200610121258 A CN 200610121258A CN 100548498 C CN100548498 C CN 100548498C
- Authority
- CN
- China
- Prior art keywords
- active fluid
- anaerobism active
- anaerobism
- fluid
- distributor
- 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.)
- Expired - Fee Related
Links
- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000011149 active material Substances 0.000 title claims abstract description 6
- 238000000889 atomisation Methods 0.000 title abstract description 3
- 239000012530 fluid Substances 0.000 claims abstract description 131
- 238000005259 measurement Methods 0.000 claims abstract description 32
- 238000009826 distribution Methods 0.000 claims abstract description 14
- 230000001105 regulatory effect Effects 0.000 claims abstract description 3
- 239000000463 material Substances 0.000 claims description 38
- 239000000758 substrate Substances 0.000 claims description 17
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 14
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 14
- 229920006324 polyoxymethylene Polymers 0.000 claims description 12
- 229920001651 Cyanoacrylate Polymers 0.000 claims description 7
- MWCLLHOVUTZFKS-UHFFFAOYSA-N Methyl cyanoacrylate Chemical compound COC(=O)C(=C)C#N MWCLLHOVUTZFKS-UHFFFAOYSA-N 0.000 claims description 7
- -1 polytetrafluoroethylene Polymers 0.000 claims description 7
- DHKHKXVYLBGOIT-UHFFFAOYSA-N 1,1-Diethoxyethane Chemical compound CCOC(C)OCC DHKHKXVYLBGOIT-UHFFFAOYSA-N 0.000 claims description 6
- 239000011354 acetal resin Substances 0.000 claims description 6
- 229920002313 fluoropolymer Polymers 0.000 claims description 5
- 239000004811 fluoropolymer Substances 0.000 claims description 5
- 239000004697 Polyetherimide Substances 0.000 claims description 4
- 229920002873 Polyethylenimine Polymers 0.000 claims description 4
- 229920001601 polyetherimide Polymers 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 208000034189 Sclerosis Diseases 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000012636 effector Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
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Abstract
The present invention relates in general to a kind of distributor, system of atomization active material and uses its method.The invention discloses a kind of distributor, comprising: the measurement controller of regulating the flow of anaerobism active fluid; And atomizer.The invention also discloses a kind of method of distributing the anaerobism active fluid of atomizing, comprising: the device that is provided for distributing the anaerobism active fluid of atomizing; Be provided for the container of anaerobism active fluid; And with the atomizing the anaerobism active fluid be assigned on the workpiece.The invention also discloses a kind of distribution system, comprising: the container that is used for the anaerobism active fluid; Be used to distribute the distributor of the anaerobism active fluid of atomizing; And the multiple degrees of freedom automatics that is operably connected to distributor.
Description
Technical field
The present invention relates to a kind of be used to distribute atomizing, anaerobism active fluid, the particularly device of cyanoacrylate fluid, method and system.
Prior art
Distribute the field at material, people are constantly towards the device of the material that can distribute anaerobism active material, particularly atomised form effectively and system and effort.But the material composition of this device can not make the anaerobism active fluid, and cyanoacrylate fluid does not for example harden from wherein flowing through (cure) or solidifies (set).Therefore, these often need dismounting after installing each the use, so that clean and/or maintenance.
In addition, device is very high with the maintenance and the cleaning charge of system.For the distributor and the system of most materials, must be at assignment period, use, in shifts or change in the materials process, man-hour that cost is quite long and produce the downtime device is cleaned, this will be converted into expense.In addition, also need to provide a kind of atomizing, anaerobic system for the high activity fluid.
Like this, need a kind of device, system and method that can overcome aforementioned and other shortcoming of the anaerobism active fluid material that distributes atomizing in the prior art.
Summary of the invention
According to a first aspect of the invention, provide a kind of device that distributes the anaerobism active fluid, comprising: measurement controller, wherein said measurement controller are used to regulate the flow of the anaerobism active fluid that flows to atomizer assembly; And atomizer assembly, its material by anti-anaerobism active fluid is made, wherein said atomizer assembly atomizing anaerobism active fluid, so that the anaerobism active fluid of atomizing to be provided, in addition, wherein said atomizer assembly comprises the nozzle of being made by the material of anti-anaerobism active fluid, and wherein said nozzle is assigned to the anaerobism active fluid of described atomizing on the workpiece; And adjustable valve plate is used on substrate transformable distance and locatees described measurement controller.
According to a second aspect of the invention, provide a kind of method of distributing the anaerobism active fluid, comprising: be provided for distributing the distributor of anaerobism active fluid, wherein said anaerobism active fluid is to distribute with the form of atomizing; Be provided for holding the container (reservoir) of anaerobism active fluid, described container is communicated with described distributor fluid; Adjustable valve plate is provided, is used for the measurement controller that on substrate transformable distance location is used to regulate the flow of described anaerobism active fluid; And the anaerobism active fluid of described atomizing is assigned on the workpiece.
According to a third aspect of the invention we, provide a kind of distribution system, comprising: the container that is used to hold the anaerobism active fluid; Distributor with inner surface is used to distribute the anaerobism active fluid of atomizing, and described distributor is communicated with described fluid container; Multiple degrees of freedom (multi-degree of freedom) automatics is operably connected with described distributor; And drive system, be used to provide driving force, so that automatics moves with multiple degrees of freedom, described drive system is operably connected with described automatics; And adjustable valve plate, be used for the measurement controller that on substrate transformable distance location is used to regulate the flow of described anaerobism active fluid.
Description of drawings
Some embodiments of the present invention are elaborated with reference to the accompanying drawing of back, and identical mark is represented identical part, wherein:
Fig. 1 has described the top perspective view according to distributor of the present invention;
Fig. 2 has described the front view according to distributor of the present invention;
Fig. 3 has described the side view according to distributor of the present invention;
Fig. 4 has described the vertical view according to distributor of the present invention;
Fig. 5 has described the Cartesian coordinate that is used to illustrate according to the action of the method and system of dispensing materials of the present invention;
Fig. 6 has described the vertical view according to distribution system of the present invention;
Fig. 7 has described the side view according to distribution system of the present invention;
Fig. 8 has described the front view according to distribution system of the present invention; And
Fig. 9 has described the block diagram according to the automatics controller of distributor of the present invention.
The specific embodiment
Although will carry out detailed demonstration and description to the specific specific embodiment of the present invention, should be understood that under the situation of the scope that does not break away from claims, can it is carried out variations and modifications.Scope of the present invention never is limited to number, material, shape, relative position of building block etc., and just discloses as an embodiment.The features and advantages of the present invention are shown at length that in the accompanying drawings in institute's drawings attached, identical Reference numeral is represented identical parts.
The invention provides a kind of device that is used to distribute anaerobism active fluid, the especially cyanoacrylate of atomizing.Although its purpose just is used for explanation, discloses one here and can be used for distributing the particularly embodiment of the anaerobism active fluid of atomizing.In the occasion that needs distribute atomizing fluids, these apparatus and method also can be used for distributing other material.
With reference to Fig. 1,2,3 and 4, the various views that are used to distribute the distributor 20 of anaerobism active fluid according to of the present invention have been described.The distributor 20 of one embodiment of the invention comprises: measurement controller 50, atomizer assembly 70 and substrate 90.Anaerobism active fluid distributing pipe 15 is operably connected on the ingress port 51 of measurement controller 50.Dispense tube 15 is connected to the fluid supply unit or the container 14 (schematically showing) of anaerobism active fluid 13 on the measurement controller 50, so that fluid 13 can flow to measurement controller 50 from container 14.Described measurement controller 50 comprises: stroke adjuster (stroke ajust) 52, internal adjuster (internal anul) 53, dispense tube screw rod 54 and measurement controller housing 55.Stroke adjuster 52 controls flow to the volume of the fluid 13 of measurement controller 50 by distributing pipe 15, through ingress port 51.
Described measurement controller 50 also comprises: threaded fittings 56, two ends male connection 57,
Lock (lock) 58 and pin (needle) 59.First end of described threaded fittings 56 is operably connected on the metering housing 55, its second end, and promptly far-end has female adapter.The female adapter of described accessory 56 can be held first end of male connection, allow male connection 57 second far-end with
Lock 58 connects.Pin 59 with
The bottom of lock 58 connects, and the tip of pin 59 extends into the entrance cavity 71 of atomizer assembly 70.
Utilize aforesaid threaded fittings 56, external screw thread or female adapter 57,
Lock 58 and pin 59 flow anaerobism active fluid 13, and up to flowing out pin 59, this is not the scope that is used for limiting the operable parts of the embodiment of the invention from ingress port 51.Other parts, particularly for example Snaptite,
The parts of integral body or non-integral etc., all can be separately and use in conjunction in device of the present invention.
As diagram schematically, anaerobism active fluid 13 under pressure from anaerobism active fluid container 14 by dispense tube 15, flow to measurement controller 50 through ingress port 51.Distributing pipe 15 and ingress port 51 are made by the material of anti-anaerobism active fluid 13, can prevent that therefore wherein fluid 13 sclerosis takes place or solidifies.Such material includes but not limited to the fluoropolymer of linear polyformaldehyde acetal resin, PEI, for example polytetrafluoroethylene (PTFE) etc.When fluid 13 entered ingress port 51, stroke adjuster 52 controls flowed into the volume of the fluid 13 of measurement controller 50.Rotation stroke adjuster 52 can be regulated the flow of fluid 13.
For example, can rotate stroke adjuster 52 in a clockwise direction, counterclockwise rotate and the flow of increase fluid 13 to reduce the flow of fluid 13.Stroke adjuster 52 clockwise directions rotate the flow that can stop any fluid 13 fully, and stroke adjuster 52 counterclockwise rotation can be so that the flow maximum of fluid 13 fully.Selectively, can select for use the computer control system (not shown) to come programming operation stroke adjuster 52, to regulate the volume that flows to the fluid 13 of measurement controller 50 from distributing pipe 15.
Behind the flow of setting anaerobism active fluid 13, described fluid 13 continues from ingress port 51, by threaded fittings 56, two ends male connection 57,
Lock 58 also flows out from pin 59, flows into the entrance cavity 71 of atomizer assembly 70.The female adapter of accessory 56 can be held two ends male connection 57, and wherein, first end of joint 57 is configured as, and is screwed into accessory 56 and is connected with accessory 56 by the first end spiral with joint 57.Second far-end that is not connected of male connection 57 with accessory 56, operationally be designed to
Lock 58 connects.First far-end and second far-end of two ends male connection 57 need not to be same size.The function of male connection 57 is with various sizes
Lock 58 is connected to each other with threaded fittings 56.
The parts that distributor 20 contacts with anaerobism active fluid 13, ingress port 51, threaded fittings 56, two ends male connection 57 and pin 59 are all made by the material of fluid-resistant 13, can prevent that therefore fluid 13 from sclerosis or curing taking place.Such material includes but not limited to the fluoropolymer of linear polyformaldehyde acetal resin, PEI, for example polytetrafluoroethylene (PTFE) etc.Above-mentioned parts also can disassemble from distributor 20 at an easy rate, so that clean, change, perhaps replace (for example size, material structure) and use disposable with different parts.
Anaerobism active fluid 13 enters atomizer 72 from entrance cavity 71.Compressed air supplies to atomizer 72 by air intake 73, and compressed air contacts on atomizer 72 with fluid 13, makes fluid 13 atomizings, and the atomizing anaerobism active fluid 75 of atomized drop form is provided.After the atomizing, atomizing fluids 75 is compressed air and is transported to nozzle 74, and nozzle 74 is assigned to workpiece 76 with atomizing fluids 75 and is used for applying, and described workpiece for example is a substrate.
Fig. 5 has described Cartesian coordinate system 100, has described four shifting axles related to the present invention.Described Cartesian coordinate system 100 comprises: X-axis 101, Y-axis 102, Z axle 103 and 2 (θ) axle 104.The circular motion that θ axle 104 constitutes around Z axle 103.
Fig. 6 has described the vertical view according to distribution system 115 of the present invention, and it comprises: container 14, distributor 20 and multiple degrees of freedom automatics 116.Described container 14 is the physical bodies that are used to hold anaerobism active fluid 13.As long as described container can hold fluid 13, can be any type of.For example, the box body that can reuse, the bag that can reuse, the jar that can reuse, disposable box body, disposable bags, disposable jar etc.Container 14 is designed for holding anaerobism active fluid 13, for example cyanoacrylate etc.
Previously described distributor 20 has the surface, inside of the anaerobism active fluid 75 that is used to distribute atomizing.The anaerobism active fluid 13 that described device 20 receives from container 14 is then with the form distributing fluids 13 of the atomizing anaerobism active fluid 75 of atomizing.Described device 20 is operably connected to a device, and for example the multiple degrees of freedom automatic positioning equipment 116.Substrate 91 links together distributor 20 and automatics 116.
Multiple degrees of freedom automatic positioning equipment 116 comprises: framework 118, Y-axis ball-screw 119, X-axis ball-screw sliding part (slide) 120, terminal manipulation device (effector) 121, first frame element 122 and second frame element 123.Along Y-axis 102 move left and right, described manipulation device 121 can be around 104 rotations of θ axle by sliding along Y-axis ball-screw sliding part 119.Similar, by sliding along X-axis ball-screw sliding part 120 with frame element 122 and frame element 123, described manipulation device 121 moves forward and backward along X-axis 101.
Fig. 7 has described the side view of the distribution system 115 of Fig. 6.By sliding on Z axle ball-screw 124, terminal manipulation device 121 moves up and down on Z axle 123.Distributor 20 is to be used for the anaerobism active fluid of atomizing is assigned to workpiece 76 as shown in the figure.In this example, workpiece 76 is the electronic components 77 on the circuit board 78.As shown in the figure, distributor 20 is operably connected on the Z axle ball-screw 124 by substrate 90.
Fig. 8 has described the front view of the distribution system 115 of Fig. 6.As shown in Figure 8, distributor 20 is connected on the terminal manipulation device 121.Distributor 20 makes anaerobism active fluid 13 mix with compressed air, thereby the anaerobism active fluid 75 of atomizing is assigned on the workpiece 76.As shown in the figure, belt conveyer 125 is connected on the framework 118.Conveyer 125 is used for travelling workpiece 76 or target, makes it pass through distribution system 115 and arrives other workbench in the production technology.
Fig. 9 has described the block diagram of the controller 135 that uses with distribution system according to the present invention.Described controller 135 comprises: nonvolatile storage, I/O (I/O) device 137 and CPU (CPU) 138.Although controller 135 can be a various forms, described controller 135 comprises the independent microcomputer based on microprocessor.Controller 135 programmable operations are with accurate, accurate, as can repeatedly to realize multiaxis simultaneously coordination.
In the scope that does not depart from the scope of the present invention with spirit, apparent to those skilled in the art to the various modifications and variations of described apparatus and method.As mentioned above, although the present invention is described with reference to the particular illustrative embodiment, should be understood that the present invention should not be defined in these specific embodiments.Can under the situation of the spirit and scope of the present invention that do not break away from following claim and limited, can carry out various variations.
Claims (27)
1, a kind of device that distributes the anaerobism active fluid comprises:
Measurement controller, described measurement controller are used to regulate the flow of the anaerobism active fluid that flows to atomizer assembly;
Atomizer assembly, its material by anti-anaerobism active fluid is made, wherein said atomizer assembly atomizing anaerobism active fluid, so that the anaerobism active fluid of atomizing to be provided, and, wherein said further atomizer assembly comprises nozzle, and described nozzle is made by the material of anti-anaerobism active fluid, and described nozzle is assigned to the anaerobism active fluid of described atomizing on the workpiece; And
Adjustable valve plate is used on substrate transformable distance and locatees described measurement controller.
According to the device of claim 1, it is characterized in that 2, also comprise the pin of being made by the material of anti-anaerobism active fluid, described pin is transported to atomizer assembly with the anaerobism active fluid.
3, according to the device of claim 1, it is characterized in that, at least one anaerobism active fluid distributing pipe of being made by the material of anti-anaerobism active fluid is operably connected to the measurement controller of being made by the material of anti-anaerobism active fluid, and is connected with the container of anaerobism active material.
According to the device of claim 1, it is characterized in that 4, described anaerobism active fluid is a cyanoacrylate.
According to the device of claim 1, it is characterized in that 5, the material of described anti-anaerobism active fluid is selected from the group that comprises following material: linear polyformaldehyde acetal resin, PEI and polytetrafluoroethylene (PTFE).
According to the device of claim 2, it is characterized in that 6, described pin is made by fluoropolymer.
According to the device of claim 6, it is characterized in that 7, described fluoropolymer is a polytetrafluoroethylene (PTFE).
8, according to the device of claim 1, it is characterized in that, also comprise valve chest.
9, according to the device of claim 1, it is characterized in that, also comprise the dispense tube screw rod, dispense tube is fixed in the valve chest.
10, according to the device of claim 1, it is characterized in that, also comprise internal adjuster (internal anul).
11, according to the device of claim 1, it is characterized in that, also comprise the stroke adjuster screw rod of accommodometer amount controller.
12, according to the device of claim 1, it is characterized in that, also comprise threaded fittings, be used for dispense tube is connected to the luer lock.
13, according to the device of claim 12, it is characterized in that, also comprise the pin of making by the material of anti-anaerobism active fluid, wherein said pin is transported to atomizer assembly with the anaerobism active fluid from described measurement controller, with, the luer lock is used for threaded fittings is connected to pin.
14, according to the device of claim 1, it is characterized in that, also comprise installing plate, be used for described measurement controller is connected to the multiple degrees of freedom automatics.
15, a kind of method of distributing the anaerobism active fluid comprises:
Be provided for distributing the distributor of anaerobism active fluid, wherein said anaerobism active fluid is to distribute with the form of atomizing;
Be provided for holding the container of anaerobism active fluid, wherein said container is communicated with described distributor fluid;
Adjustable valve plate is provided, is used for the measurement controller that on substrate transformable distance location is used to regulate the flow of described anaerobism active fluid; And
The anaerobism active fluid of atomizing is assigned on the workpiece.
According to the method for claim 15, it is characterized in that 16, described method also comprises described distributor is connected on the multiple degrees of freedom automatics.
17, according to the method for claim 15, it is characterized in that, described distributor also comprises the anaerobism active fluid distributing pipe that at least one is made by the material of anti-anaerobism active fluid, this dispense tube is operably connected on the measurement controller of being made by the material of anti-anaerobism active fluid, and is connected with the container of described anaerobism active material.
According to the method for claim 15, it is characterized in that 18, described measurement controller is regulated the flow of the described anaerobism active fluid that flows to pin.
According to the method for claim 15, it is characterized in that 19, described distributor also comprises a pin of being made by the material of anti-anaerobism active fluid, wherein said pin is transported to atomizer with described anaerobism active fluid stream.
20, according to the method for claim 15, it is characterized in that, described distributor also comprises an atomizer that is used for described anaerobism active fluid, described atomizer is made by anti-anaerobism active fluid material, wherein said atomizer atomizes to described anaerobism active fluid, and the anaerobism active fluid of atomizing is provided.
According to the method for claim 15, it is characterized in that 21, described distributor also comprises a nozzle of being made by anti-anaerobism active fluid material, wherein said nozzle is assigned to the anaerobism active fluid of atomizing on the workpiece.
According to the method for claim 15, it is characterized in that 22, described anaerobism active fluid is a cyanoacrylate.
According to the method for claim 15, it is characterized in that 23, the material of described anti-anaerobism active fluid is selected from the group that comprises following material: linear polyformaldehyde acetal resin, PEI and polytetrafluoroethylene (PTFE).
24, a kind of distribution system comprises:
Be used to hold the container of anaerobism active fluid;
Distributor with inner surface is used to distribute the anaerobism active fluid of atomizing, and described distributor is communicated with described fluid container;
The multiple degrees of freedom automatics is operably connected with described distributor;
Drive system is used to provide driving force, so that automatics moves with multiple degrees of freedom, described drive system is operably connected with described automatics; And
Adjustable valve plate is used for the measurement controller that on substrate transformable distance location is used to regulate the flow of described anaerobism active fluid.
According to the distribution system of claim 24, it is characterized in that 25, described fluid container is a cyanoacrylate.
According to the distribution system of claim 24, it is characterized in that 26, described distributor comprises the parts that at least one is made by anti-anaerobism active fluid material.
According to the distribution system of claim 24, it is characterized in that 27, the material of described anti-anaerobism active fluid is selected from the group that comprises following material: linear polyformaldehyde acetal resin, PEI and polytetrafluoroethylene (PTFE).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101212582A CN100548498C (en) | 2006-04-30 | 2006-04-30 | The distributor of atomization active material, system and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101212582A CN100548498C (en) | 2006-04-30 | 2006-04-30 | The distributor of atomization active material, system and using method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101062495A CN101062495A (en) | 2007-10-31 |
| CN100548498C true CN100548498C (en) | 2009-10-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006101212582A Expired - Fee Related CN100548498C (en) | 2006-04-30 | 2006-04-30 | The distributor of atomization active material, system and using method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100548498C (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87107016A (en) * | 1986-11-16 | 1988-06-15 | 日和产业株式会社 | Quantitative dispensing valve |
| US6132809A (en) * | 1997-01-16 | 2000-10-17 | Precision Valve & Automation, Inc. | Conformal coating using multiple applications |
| US6196521B1 (en) * | 1998-08-18 | 2001-03-06 | Precision Valve & Automation, Inc. | Fluid dispensing valve and method |
| US6378737B1 (en) * | 1997-06-30 | 2002-04-30 | Speedline Technologies, Inc. | Controllable liquid dispensing device |
-
2006
- 2006-04-30 CN CNB2006101212582A patent/CN100548498C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87107016A (en) * | 1986-11-16 | 1988-06-15 | 日和产业株式会社 | Quantitative dispensing valve |
| US6132809A (en) * | 1997-01-16 | 2000-10-17 | Precision Valve & Automation, Inc. | Conformal coating using multiple applications |
| US6378737B1 (en) * | 1997-06-30 | 2002-04-30 | Speedline Technologies, Inc. | Controllable liquid dispensing device |
| US6196521B1 (en) * | 1998-08-18 | 2001-03-06 | Precision Valve & Automation, Inc. | Fluid dispensing valve and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101062495A (en) | 2007-10-31 |
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Granted publication date: 20091014 Termination date: 20110430 |