CN2706605Y - Micro-diaphragm pump with pressure interlock - Google Patents
Micro-diaphragm pump with pressure interlock Download PDFInfo
- Publication number
- CN2706605Y CN2706605Y CN 03256480 CN03256480U CN2706605Y CN 2706605 Y CN2706605 Y CN 2706605Y CN 03256480 CN03256480 CN 03256480 CN 03256480 U CN03256480 U CN 03256480U CN 2706605 Y CN2706605 Y CN 2706605Y
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- pump
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- pressure
- interlocking
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Abstract
A micro-diaphragm pump with pressure interlock is used as a power source actuator which is mounted on the top of a pump diaphragm and drives the pump diaphragm to move up and down. The pump diaphragm is sealed on the periphery of the opening of an upper pump body whose inner at least is provided with a working cavity chamber and an annular cavity communicating with a fluid outlet. The inner of a lower pump body is provided with a pressure interlock cavity chamber and an entering liquid cavity chamber which communicates with a liquid inlet. A valve diaphragm between the upper pump body and the lower pump body is at proper position provided with a hole which communicates with the working cavity chamber. With the micro-diaphragm pump with pressure interlock having pressure interlock function, the liquid of the input terminal of the micro-diaphragm pump with pressure interlock produces to direct discharge under the control of the pump body when the pressure of the liquid of the input terminal outweights the pressure of the liquid of the output terminal so that the micro-diaphragm pump with pressure interlock has high safety and reliability when the micro-diaphragm pump with pressure interlock is used as an insulin pump or a micro-pump for other medical purpose.
Description
Technical field
The utility model relates to membrane pump, refer to a kind ofly to be applied in bioengineering, the blood circulation system especially, non-straight-through type, when inlet pressure is big, the micro-membrane pump of the band pressure interlocking that fluid can not directly be discharged by pump.
Background technique
The Micropump of various ways is disclosed at present.For example: a kind of " membrane pump ", its patent No. are 96211924.5, and its structure is shown in Fig. 5,6.The working principle of this pump is: a motor 2 is fixed on the support 1, diaphragm 9 is installed in the air chamber 3, be fixed on the fork 10 by compressing tablet 8, and connect with electric machine main shaft by fork 10 and eccentric wheel 6, valve block 5 is placed in and offers inlet hole 11 and air outlet hole 12 between the valve body 4,7, on the valve body respectively, and be provided with same valve block holder 13 in a side of air outlet hole and inlet hole, and two valve block holders that direction is set is opposite, its effect is the Oscillation Amplitude that reduces diaphragm, increase the seal of air chamber, to improve the pressure reduction of bleeding of pump.
And for example: the patent No. is 00210285 " driving mechanism of intelligent insulin ", utilize screw-nut body the output movement of motor to be converted to the straight line motion of cylinder piston, realization is to the function of human body supplementation with insulin, to satisfy the usage requirement of artificial-intelligent type infusion of insulin.
All the kinds of drive that adopt machinery in the above-mentioned known techniques, its P
Go into＞P
Go out+ P
The valve film, liquid is directly to discharge through entering the mouth, and is the straight-through type discharging, again owing to be the moving up and down of mechanical motion drive film, and makes its structure relative complex, less stable, working life low, narrow application range.
Summary of the invention
Main purpose of the present utility model, be to provide a kind of on-mechanical transmission, the discharging of non-straight-through type, but with an actuator as power source, can drive the pumping diaphragm that is arranged at its below pumps, make the Volume Changes in the pump chamber, and then reach from inlet and suck liquid, from the micro-membrane pump of the band pressure interlocking of outlet drain.
The purpose of this utility model is, a kind of band pressure interlocking trace membrane pump is provided, the back side of its outlet valve is provided with a cavity that is communicated with inlet, this cavity can be realized the pressure interlocking function, promptly when reaching the fluid pressure fluctuation of inlet, the liquid that can not of input end is directly discharged from outlet because of overpressure.
Another purpose of the present utility model is, provides that a kind of volume is little, flow is little, and is easy to use, the life-span is long, portable and be applied to the micro-membrane pump of the band pressure interlocking on insulin pump or the medical micro pump.
The technical solution of the utility model: a kind of micro-membrane pump with the pressure interlocking, mainly comprise: on, lower pump body, it is characterized in that: an actuator as power source places the top of a pumping diaphragm and drives pumping diaphragm and pumps, this pumping diaphragm sealing is in the opening periphery of upper pump casing, and be provided with a work chamber and a ring chamber that communicates with fluid output in the upper pump casing at least, be provided with a feed liquor chamber and a pressure interlocking chamber in one lower pump body, this feed liquor chamber communicates with a liquid inlet, one valve film places between the lower pump body, and is provided with the hole that communicates with work chamber in the appropriate position of valve film.Wherein:
The micro-membrane pump of described band pressure interlocking can be the bivalve micro-membrane pump of the band pressure interlocking of configuration side by side.
The upper surface of described upper pump casing is provided with the shallow grooves that is complementary with pumping diaphragm and is located at two left and right C of work chamber arranged side by side of shallow grooves bottom surface, C1, and, reach a liquid outlet that is connected with ring chamber D in the ring chamber D that is provided with under shed on every side of right cavity C 1.
The upper surface of described lower pump body is provided with two feed liquor chamber A and pressure interlocking chamber A1 arranged side by side, this two cavity bottom respectively be located at lower pump body in the runner that has the liquid inlet communicate, and around feed liquor chamber A, be provided with the ring chamber B of upper shed.
Described valve film is one to have the film of enough elasticity, toughness, can make by corrosion-resistant, wear-resisting rubber, plastic cement or metallic thin film, sealing is between the upper and lower pump housing, and can be covered in the left and right C of work chamber respectively with the variation of pump pressure, C1, other is provided with the hole that communicates with the left C of work chamber in the appropriate position of the ring chamber B of relative lower pump body.
The utility model also can be realized by following scheme: the micro-membrane pump of described band pressure interlocking can be the micro-membrane pump of the band pressure interlocking of bivalve concentric arrangement.Wherein:
Be provided with the upper and lower C of work chamber of the perforation that is complementary with pumping diaphragm in the middle of the described upper pump casing, C1 is provided with the ring chamber D of under shed around the C1 of its work chamber, and a liquid outlet that is connected with ring chamber D.
The centre of described lower pump body is provided with a chamber E, is provided with the feed liquor chamber A and the pressure interlocking chamber A1 of upward opening around it, and this feed liquor chamber A communicates with the runner that has the liquid inlet.
Described valve film is one to have the film of enough elasticity, toughness, can make by corrosion-resistant, wear-resisting rubber, plastic cement or metallic thin film, the appropriate position of lower pump body chamber E is provided with a hole that communicates with the C of work chamber relatively, sealing and is covered in the C1 of work chamber with the variation of pump pressure between the upper and lower pump housing.
Above actuator can be piezoelectric constant or magnetostriction materials or electromagnet even press a spring sheet to constitute with the cam on the motor shaft.
Advantage of the present utility model is:
Therefore 1, because this pump has the pressure interlocking function, the specific output end pressure appears when high when the liquid input end, i.e. P
Go into＞P
Go outThe time, it can prevent that liquid that can not is subjected to the control of the pump housing and produces straight-through discharging, so have more Security, reliability as insulin pump or analgesia pump the time.Known membrane pump is directly discharged by the control of the pump housing then, causes the unnecessary harm of human body, and can not use.
2, because actuator itself promptly is a power source, be the transmission of on-mechanical formula, so it is simple in structure, volume is little, cost is low, long service life, even inlet pressure is high again, fluid also can't directly flow out by pump.
Description of drawings
Fig. 1 is the utility model first embodiment's structure sectional view.
Fig. 2 is the utility model second embodiment's structure sectional view.
Fig. 3-4, be the pressure interlocking principle and general reciprocating pump schematic diagram.
Fig. 5, be the structure sectional view of known techniques.
Fig. 6, be the structural representation of known techniques valve block holder.
Embodiment
The working principle of the micro-membrane pump of the utility model band pressure interlocking is, adopt the power source of an actuator as pump, can drive underlaid pumping diaphragm pumps, make the Volume Changes in the pump chamber, reach from inlet suction liquid, from the outlet drain, have one to be communicated with and the cavity that enters the mouth in addition at the back side of outlet valve, this cavity provides the pressure interlocking function, makes also can not make more liquid from exporting direct discharge, that is: P when fluctuation takes place the fluid pressure that reaches inlet
Go intoCan not directly discharge greatly again.Because of pump itself has the pressure interlocking function, has only the P of working as
Go into＞P
Valve 1+ P
Pump chamber 1And P
Pump chamber 2＞P
Valve 2+ P
Go intoPump could continue conducting (P when satisfying simultaneously
Pump chamber 1And P
Pump chamber 2When initiatively enlarging for pump chamber and the pressure when dwindling).As can be seen from the above equation, when pump chamber pressure did not take place initiatively to change, big again incoming pressure also can't be delivered directly to delivery side of pump, and therefore, this pump is compared with known techniques becomes a non-straight-through type emptying pump.
Embodiment 1
Referring to Fig. 1, the micro-membrane pump for the band pressure interlocking of disposing arranged side by side of a kind of bivalve mainly comprises: actuator 1, pumping diaphragm 2, upper pump casing 3, valve film 4 and lower pump body 5; Wherein:
The below of actuator 1 is provided with a pumping diaphragm 2, pumping diaphragm 2 is one to have the film of enough elasticity, toughness, can make by corrosion-resistant, wear-resisting rubber, plastic cement or metal foil, sealing is in the periphery of upper pump casing 3 openings, this actuator 1 can be piezoelectric constant, can be in vertical reciprocating motion by the flexible automatically or crooked pumping diaphragm 2 that drives after its two poles of the earth energising.
Valve film 4, be one to have the film of enough elasticity, toughness, can make by corrosion-resistant, wear-resisting rubber, plastic cement or metal foil, sealing is between upper pump casing 3 and lower pump body 5, and can be covered in the left and right C of work chamber respectively with the variation of pump pressure, C1, other is provided with the hole 8 that communicates with the left C of work chamber in the appropriate position of the ring chamber B of relative lower pump body 5.
Above-mentioned actuator 1, pumping diaphragm 2, upper pump casing 3, valve film 4 and lower pump body 5 all can be cuboid, square body or other structure that cooperatively interacts.
During work, when actuator 1 moves upward, drive pumping diaphragm 2 upwards, make the volume of active chamber C strengthen б 1, the A-C place of valve film 4 is upwards inhaled, liquid then enters ring chamber B from admission chamber A, and the through hole on valve film 48 enters the C of work chamber, the liquid that therefore б 1 amount arranged from the liquid inlet 6 through admission chamber A, ring chamber B to active chamber C.
When actuator 1 moved downward, the A-C place of valve film 4 was closed, and the liquid among the C of work chamber is pressed between the C1 of work chamber and pressure interlock cavities A1 of valve film 4, made valve film 4 open flow direction ring chamber D and discharged from liquid outlet 7.
When the pressure at admission chamber A place strengthened, this pressure was opened the A-C place of valve film 4, and A-B-C is up to the C1 place for this pressure process.When not having pressure interlock cavities A1, the valve film 4 that this pressure will be opened the C1 place makes flow direction ring chamber D, thereby makes liquid directly from entering the mouth 6 to outlet 7 straight-through discharges.But the setting of pressure interlock cavities A1 has been arranged, and be communicated with admission chamber A, so the pressure at active chamber C1 place will be less than the pressure at pressure interlock cavities A1 place, the valve film 4 at C1-A1 place can not be out of shape, can not open the path of C1-D, therefore the pump liquid measure of this pump housing will not be discharged from liquid outlet 7 by the influence of incoming pressure will, so have more Security.
Referring to Fig. 2, the micro-membrane pump for a kind of band pressure interlocking of bivalve concentric arrangement mainly comprises: actuator 1, pumping diaphragm 2, upper pump casing 3, valve film 4 and lower pump body 5, wherein;
The below of actuator 1 is provided with a pumping diaphragm 2, pumping diaphragm 2 is one to have the film of enough elasticity, toughness, can make by corrosion-resistant, wear-resisting rubber, plastic cement or metal foil, sealing is in the periphery of upper pump casing 3 openings, this actuator 1 can be magnetostriction materials and makes, and adds the magnetic field boundary and can produce and flexible be in vertical reciprocating motion to drive pumping diaphragm 2.Above-mentioned actuator 1 can be the disc that discoid or bottom surface has arc.
Be provided with the upper and lower C of work chamber of the perforation that is complementary with pumping diaphragm 2 in the middle of the upper pump casing 3, C1 is provided with the ring chamber D of under shed around the C1 of its work chamber, and a liquid outlet 7 that is connected with ring chamber D.Should go up the C of work chamber can be greater than the following C1 of work chamber.
The centre of lower pump body 5 is provided with a chamber E, is provided with the feed liquor chamber A and the pressure interlocking chamber A1 of upward opening around it, and this feed liquor chamber A communicates with the runner that has liquid inlet 6.
Valve film 4 is one to have the film of enough elasticity, toughness, the appropriate position of lower pump body chamber E is provided with a hole 8 that communicates with the C of work chamber relatively, can make by corrosion-resistant, wear-resisting rubber, plastic cement or metallic thin film, sealing and can be covered in the C1 of work chamber with the variation of pump pressure between upper pump casing 3 and lower pump body 5 peripheries.
During work, when actuator 1 moves upward, driving pumping diaphragm 2 upwards makes the volume intensified pressure of active chamber C reduce, make the upwards distortion of work chamber C1 place of valve film 4, cause admission chamber A to produce the gap to chamber E place, liquid then enters chamber E from the A-C1 gap location, and the through hole on valve film 48 enters the C of work chamber.
When actuator 1 moved downward, pumping diaphragm 2 was closed the A-E gap, but because active chamber C volume reduces the pressure increasing, made pumping diaphragm 2 move downward the gap that produces the C1-D place, made liquid enter ring chamber D by this gap and discharged from liquid outlet 7.
When liquid inlet place 6 produces high pressure suddenly, this pressure can back down the valve film 4 between A-E, enters the E chamber to the C chamber, but when it attempted to back down valve film 4 between C1-D, the pressure that has run into the place, liquid inlet was big, and liquid enters the condition of ring chamber D and is at this moment:
P＞P
AE+ P
A+ P
CD(P wherein
AEBe to make valve film 4 that the pressure of fluid path is provided in the distortion of A-E place; P
CDBe to make the valve film be out of shape the pressure that fluid path is provided at the C1-D place, and the pressure source of this moment is P, promptly inlet pressure equals interlocking pressure P=P
A1, (unless pumping diaphragm does not have tension force in gap, two places, liquid can pass through), and our pumping diaphragm of design has certain pressure interlocking, therefore liquid can not make liquid directly discharge from outlet when actuator is not worked owing to the pressurization of liquid inlet yet, has more Security, reliability for this reason.
This pump structure is simple, reasonable in design, can make not only that its volume is little, cost is low, long service life, even the hydrodynamic pressure at 6 places that enter the mouth is high again, all can not flow out from exporting 7 by pump automatically.
Above-mentioned upper pump casing 3 and lower pump body 5 all can adopt bigger material of rigidity and structural type.
Actuator 1 can be piezoelectric constant or magnetostriction materials or electromagnet even press a spring sheet all can reach the purpose that it moves up and down with the cam on the motor shaft.
Referring to Fig. 3-4, be the pressure interlocking principle and general reciprocating pump schematic diagram.Now be described as follows in conjunction with figure:
General reciprocating pump working principle is seen Fig. 3: when the pump chamber volume becomes big, and the one-way valve opens on the left side, the closed check valve on the right.Liquid this moment (or gas) enters pump chamber from liquid entering hole.When the pump chamber smaller volume, liquid is washed left closed check valve right one-way valve liquid open and is exported from liquid outlet.This pump can only unidirectional protection, promptly when big pressure appears in liquid outlet because the cause of one-way valve is arranged, liquid that can not turns back to liquid entering hole from liquid outlet.But when liquid entering hole pressure during greater than two one-way valve strength of actions and liquid outlet pressure sum liquid will directly arrive liquid outlet and form straight-through from liquid entering hole.
The liquid that still can not make when inlet pressure adds two one-way valve action forces greater than outlet pressure exactly that this patent will solve is not subjected to the control generation of pump straight-through.Method is that on the right the one-way valve back side adds the upward pressure interlock cavities, makes the action force of this valve be subjected to the influence of liquid entering hole pressure.Also promptly the operating pressure of this valve must just can be opened (see figure 4) greater than inlet hydraulic.
As seen from the figure, opening of delivery valve must be based upon on the basis of pump internal pressure greater than incoming pressure.Otherwise no matter incoming pressure becomes much, wants to make liquid output, must overcome himself pressure.And the strength that overcomes himself pressure can only be provided by the power source of pump.
Claims (10)
1, a kind of micro-membrane pump with the pressure interlocking, mainly comprise: on, lower pump body, it is characterized in that: an actuator as power source places the top of a pumping diaphragm and drives pumping diaphragm and pumps, this pumping diaphragm sealing is in the opening periphery of upper pump casing, and be provided with a work chamber and a ring chamber that communicates with fluid output in the upper pump casing at least, be provided with a feed liquor chamber and a pressure interlocking chamber in one lower pump body, this feed liquor chamber communicates with a liquid inlet, one valve film places between the lower pump body, and is provided with the hole that communicates with work chamber in the appropriate position of valve film.
2, according to the micro-membrane pump of the described band pressure of claim 1 interlocking, it is characterized in that: the micro-membrane pump of described band pressure interlocking can be the bivalve micro-membrane pump of the band pressure interlocking of configuration side by side.
3, according to the micro-membrane pump of the described band pressure of claim 2 interlocking, it is characterized in that: the upper surface of described upper pump casing is provided with the shallow grooves that is complementary with pumping diaphragm and is located at two left and right C of work chamber arranged side by side of shallow grooves bottom surface, C1, and, reach a liquid outlet that is connected with ring chamber D in the ring chamber D that is provided with under shed on every side of right cavity C 1.
4, according to the micro-membrane pump of the described band pressure of claim 2 interlocking, it is characterized in that: the upper surface of described lower pump body is provided with two feed liquor chamber A and pressure interlocking chamber A1 arranged side by side, this two cavity bottom respectively be located at lower pump body in the runner that has the liquid inlet communicate, and around feed liquor chamber A, be provided with the ring chamber B of upper shed.
5, according to the micro-membrane pump of the described band pressure of claim 2 interlocking, it is characterized in that: described valve film is one to have the film of enough elasticity, toughness, can make by corrosion-resistant, wear-resisting rubber, plastic cement or metallic thin film, sealing is between the upper and lower pump housing, and can be covered in the left and right C of work chamber respectively with the variation of pump pressure, C1, other is provided with the hole that communicates with the left C of work chamber in the appropriate position of the ring chamber B of relative lower pump body.
6, according to the micro-membrane pump of the described band pressure of claim 1 interlocking, it is characterized in that: the micro-membrane pump of described band pressure interlocking can be the micro-membrane pump of the band pressure interlocking of bivalve concentric arrangement.
7, according to the micro-membrane pump of the described band pressure of claim 6 interlocking, it is characterized in that: the upper and lower C of work chamber that is provided with the perforation that is complementary with pumping diaphragm in the middle of the described upper pump casing, C1, be provided with the ring chamber D of under shed around the C1 of its work chamber, and a liquid outlet that is connected with ring chamber D.
8, according to the micro-membrane pump of the described band pressure of claim 6 interlocking, it is characterized in that: the centre of described lower pump body is provided with a chamber E, be provided with the feed liquor chamber A and the pressure interlocking chamber A1 of upward opening around it, this feed liquor chamber A communicates with the runner that has the liquid inlet.
9, according to the micro-membrane pump of the described band pressure of claim 6 interlocking, it is characterized in that: described valve film is one to have the film of enough elasticity, toughness, can make by corrosion-resistant, wear-resisting rubber, plastic cement or metallic thin film, the appropriate position of lower pump body chamber E is provided with a hole that communicates with the C of work chamber relatively, sealing and is covered in the C1 of work chamber with the variation of pump pressure between the upper and lower pump housing.
10, according to the micro-membrane pump of the described band pressure of claim 1 interlocking, it is characterized in that: described actuator can be piezoelectric constant or magnetostriction materials or electromagnet even press a spring sheet to constitute with the cam on the motor shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03256480 CN2706605Y (en) | 2003-05-06 | 2003-05-06 | Micro-diaphragm pump with pressure interlock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03256480 CN2706605Y (en) | 2003-05-06 | 2003-05-06 | Micro-diaphragm pump with pressure interlock |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2706605Y true CN2706605Y (en) | 2005-06-29 |
Family
ID=34842808
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03256480 Expired - Lifetime CN2706605Y (en) | 2003-05-06 | 2003-05-06 | Micro-diaphragm pump with pressure interlock |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2706605Y (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1320275C (en) * | 2003-05-06 | 2007-06-06 | 王勤 | Micro-thin film pump with double-directional overpressure protection function and application thereof |
| WO2009152775A1 (en) * | 2008-06-20 | 2009-12-23 | 微创医疗器械(上海)有限公司 | A micro pump |
| CN101463808B (en) * | 2007-12-21 | 2010-12-08 | 研能科技股份有限公司 | Fluid delivery device |
| CN101377192B (en) * | 2007-08-30 | 2012-06-13 | 研能科技股份有限公司 | Fluid delivery device |
| CN105587628A (en) * | 2015-05-08 | 2016-05-18 | 长春工业大学 | Patch sandwich longitudinal-torsional complex excitation active water spraying propulsion device and driving method thereof |
| CN105587614A (en) * | 2015-05-08 | 2016-05-18 | 长春工业大学 | High-output active type water jet propulsion unit and drive method thereof |
| CN105587616A (en) * | 2015-05-08 | 2016-05-18 | 长春工业大学 | Bending vibration surface mount type active water spraying propulsion device and driving method thereof |
| CN105587609A (en) * | 2015-05-08 | 2016-05-18 | 长春工业大学 | Sandwich type longitudinal and bending complex-excitation passive water jet propulsion unit and drive method thereof |
| CN105587601A (en) * | 2015-05-08 | 2016-05-18 | 长春工业大学 | Powerful output passive jet propulsion device and driving method thereof |
| CN105587624A (en) * | 2015-05-08 | 2016-05-18 | 长春工业大学 | Surface mount sandwich type longitudinal bending complex excitation active water spraying propulsion device and driving method thereof |
| CN107654358A (en) * | 2012-04-19 | 2018-02-02 | 株式会社村田制作所 | Fluid control device |
| CN111016434A (en) * | 2019-12-25 | 2020-04-17 | 西安交通大学 | Thin film type ink-jet printing head based on extrusion mode |
-
2003
- 2003-05-06 CN CN 03256480 patent/CN2706605Y/en not_active Expired - Lifetime
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1320275C (en) * | 2003-05-06 | 2007-06-06 | 王勤 | Micro-thin film pump with double-directional overpressure protection function and application thereof |
| CN101377192B (en) * | 2007-08-30 | 2012-06-13 | 研能科技股份有限公司 | Fluid delivery device |
| CN101463808B (en) * | 2007-12-21 | 2010-12-08 | 研能科技股份有限公司 | Fluid delivery device |
| WO2009152775A1 (en) * | 2008-06-20 | 2009-12-23 | 微创医疗器械(上海)有限公司 | A micro pump |
| CN107654358B (en) * | 2012-04-19 | 2020-02-21 | 株式会社村田制作所 | Fluid control device |
| CN107654358A (en) * | 2012-04-19 | 2018-02-02 | 株式会社村田制作所 | Fluid control device |
| CN105587616A (en) * | 2015-05-08 | 2016-05-18 | 长春工业大学 | Bending vibration surface mount type active water spraying propulsion device and driving method thereof |
| CN105587609A (en) * | 2015-05-08 | 2016-05-18 | 长春工业大学 | Sandwich type longitudinal and bending complex-excitation passive water jet propulsion unit and drive method thereof |
| CN105587601A (en) * | 2015-05-08 | 2016-05-18 | 长春工业大学 | Powerful output passive jet propulsion device and driving method thereof |
| CN105587624A (en) * | 2015-05-08 | 2016-05-18 | 长春工业大学 | Surface mount sandwich type longitudinal bending complex excitation active water spraying propulsion device and driving method thereof |
| CN105587614A (en) * | 2015-05-08 | 2016-05-18 | 长春工业大学 | High-output active type water jet propulsion unit and drive method thereof |
| CN105587628A (en) * | 2015-05-08 | 2016-05-18 | 长春工业大学 | Patch sandwich longitudinal-torsional complex excitation active water spraying propulsion device and driving method thereof |
| CN111016434A (en) * | 2019-12-25 | 2020-04-17 | 西安交通大学 | Thin film type ink-jet printing head based on extrusion mode |
| CN111016434B (en) * | 2019-12-25 | 2021-07-27 | 西安交通大学 | Thin film type ink-jet printing head based on extrusion mode |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20030506 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |