CN109771739A - A kind of drug injector of piezoelectric patches driving - Google Patents
A kind of drug injector of piezoelectric patches driving Download PDFInfo
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- CN109771739A CN109771739A CN201910191939.3A CN201910191939A CN109771739A CN 109771739 A CN109771739 A CN 109771739A CN 201910191939 A CN201910191939 A CN 201910191939A CN 109771739 A CN109771739 A CN 109771739A
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Abstract
The present invention relates to a kind of drug injectors of piezoelectric patches driving, belong to medical instruments field.Body top is equipped with the syringe with auxiliary piston, is equipped with cylinder chamber, and cylinder chamber is separated into left right cylinder cavity by main piston；Main piston push rod is through stretching out and acting against on auxiliary piston push rod in cylinder chamber left wall；Bottom part body is equipped with enterprising stomata, boss and multiple rotary table groups；Top of the box is equipped with lower air inlet, vestibule, distinguishes equal body cavity group and body cavity with the air storage chamber of lower outlet plenum connection and with rotary table group and its contained rotary table quantity；For main body on the cabinet, it is intracavitary and make outlet plenum up and down and air storage chamber connection that boss is placed in hole；Driver is crimped in body cavity and is constituted compression chamber up and down by the sealed circle of rotary table, and the compression chamber up and down in same body cavity group respectively and is unified into compression chamber group up and down, each upper compression chamber group and each lower compression chamber group be connected into respectively above and below compression unit；Left cylinder cavity is connect through appendix with reversal valve, and right cylinder cavity is connected through appendix and reversal valve with air storage chamber.
Description
Technical field
The invention belongs to medical instruments fields, and in particular to a kind of drug injector of piezoelectric patches driving.
Background technique
Drug administration by injection mainly has intravenous injection, intramuscular injection and subcutaneous injection etc..Intravenous injection is also referred to as infusion administration, existing
Infusion device is mostly made of infusion bottle, perfusion tube and infusion support, and infusion bottle is hung on infusion support, is self-possessed by medical fluid and flows
And it is injected into the blood vessel of people through perfusion tube.This infusion mode can bring many problems in actual use: pass through side manually
Method adjusts flow, and flow control accuracy is inadequate；Patient walks about, go to the toilet when need other people to hold infusion bottle high, activity is inconvenient
And it can also make blood backflow when infusion bottle insufficient height；It needs patient or nursing staff to guard for a long time, such as finds not in time defeated
Liquid completion may also result in accident；Medical fluid is contacted with air, and there are also contaminated possibilities when surrounding air is unclean.In addition to above-mentioned
Outside immediate problem, also it can shorten transfusion time by reducing the methods of amount of solution, quickening transfusion speed sometimes, this is not only aggravated
Heart burden, also affects therapeutic effect: intramuscular injection is with subcutaneous injection by drug injection to flesh within the relatively short time
Meat is subcutaneous, and maximum drawback is that blood concentration differs greatly in an injection cycle, is unfavorable for the effective absorption and benefit of drug
With, because are as follows: most drugs have preferred concentration range in human body, when drug concentration is excessively high have toxic side effect, it is too low when
To not have therapeutic effect.Therefore, the microminiature Portable medicine controlled release that the drug injection time can be extended, keep reasonable drug concentration
Device or system is urgently needed for current medical field.
Summary of the invention
To improve gas output pressure, the present invention proposes a kind of drug injector of piezoelectric patches driving, implementation of the invention
Scheme is: body top is equipped with cylinder chamber and the baffle with sliding slot, and the centerline of cylinder chamber is in horizontal plane；The side wall ends of cylinder chamber
Equipped with cylinder cap, main piston covers intracavitary in cylinder and is divided into left right cylinder cavity；Syringe is made of cylindrantherae and auxiliary piston, auxiliary piston
It is placed in cylindrantherae and constitutes medicine cavity, the otic placode of cylindrantherae one end is placed in the sliding slot of baffle, the other end is equipped with the perfusion tube with syringe needle；
The push rod of main piston is stretched out and is acted against on the push rod of auxiliary piston through the through-hole in cylinder chamber left wall；Bottom part body is equipped with upper air
Hole, the boss for taking outlet plenum and at least two rotary table groups, from left to right the quantity of rotary table contained by each rotary table group is successively reduced；Respectively
A rotary table in rotary table group is equipped with enterprising oral cavity and upper venthole, is provided only with upper vent hole on other rotary tables；Leftmost side circle
Enterprising oral cavity in platform group is connected to enterprising stomata, and the upper venthole in the rotary table group of the rightmost side is connected to upper outlet chamber；Same circle
Upper venthole in platform group is connected to upper vent hole through upper intercommunicating pore, enterprising oral cavity and upper outlet in two or so adjacent rotary table groups
Hole connection；Enterprising outlet plenum and the valve block installed in it respectively constitute terminal valve, and valve block is cantilever valve or disc valve；
The top of cabinet be equipped with lower air inlet, the vestibule of leukorrhagia outlet plenum, the air storage chamber that is connected to lower outlet plenum and with rotary table group and its
Contained rotary table quantity distinguishes equal body cavity group and body cavity；A body cavity in each body cavity group is equipped with lower inlet chamber and lower outlet
Hole is provided only with lower venthole on other body cavitys；Lower inlet chamber in the body cavity group of the leftmost side is connected to lower air inlet, rightmost side body cavity
Lower production well in group is connected to lower outlet plenum；Lower production well in same body cavity group is connected to lower venthole through lower intercommunicating pore,
Lower inlet chamber in other two or so adjacent body cavity groups is connected to lower production well；Lower disengaging oral cavity and the valve block installed in it
Respectively constitute lower terminal valve；Main body is mounted on cabinet through screw, and it is intracavitary and make outlet plenum and gas storage up and down that boss is placed in hole
Room is connected；Rotary table is placed in body cavity and driver is crimped in body cavity by sealed circle, and sealing ring is located at driver or more two
Side, driver are made of the washer of two piezoelectric vibrators and its intermediate crimping, and piezoelectric vibrator is formed by substrate and piezoelectric piece bonding,
Piezoelectric patches is installed close to washer, and the surface of piezoelectric vibrator is coated with insulated paint or is bonded with insulation film；Two piezoelectricity in driver
Bending deformation direction when oscillator is acted on by voltage is identical, and the deformation direction of driver is the deformation side of two piezoelectric vibrators
To；Driver and sealing ring and main body and cabinet respectively constitute compression chamber up and down, the difference of compression chamber up and down in same body cavity group
And it is unified into compression chamber group up and down, each upper compression chamber group and each lower compression chamber group are connected into compression unit up and down respectively, compress up and down
Unit is in parallel；In work, the deformation direction of same body cavity group inner driver is identical, the deformation side of driver in two adjacent body cavity groups
To on the contrary, compression unit carries out gas to be alternately discharged into air storage chamber after accumulation is compressed step by step respectively up and down；Left cylinder cavity is through gas transmission
Pipe is connect with reversal valve, and right cylinder cavity is connected through appendix and reversal valve with air storage chamber；Reversal valve is three-position four-way valve.
For having the drug injector there are three upper and lower compression chamber group, from right to left, rotary table group is successively defined as rotary table
Group one, two and three, body cavity group is successively defined as body cavity group one, two and three, and upper inlet valve is successively defined as upper inlet valve one, two and
Three, lower inlet valve is successively defined as lower inlet valve one, two and three, and upper compression chamber group is successively defined as compression chamber group one, two and
Three, lower compression chamber group is successively defined as lower compression chamber group one, two and three, then specific work process are as follows: in upper half, body cavity group one
Be bent downwardly with the driver in three, the driver in body cavity group two is bent upwards, upper inlet valve one and three, lower inlet valve two and
Lower outlet valve is opened, and upper inlet valve two, upper outlet valve and lower inlet valve one and three are closed, upper compression chamber group one and three, lower compression
Chamber two sucks gas, and gas is discharged in upper compression chamber group two, lower compression chamber one and three, this is is drained through journey under upper suction, the gas being discharged
Body experienced the compression of accumulation step by step of compression chamber group three, two and one；In lower half, the driver in body cavity group one and three is upward
Driver in bending, body cavity group two is bent downwardly, and upper inlet valve one and three, lower inlet valve two and lower outlet valve are closed, enterprising
Mouth valve two, upper outlet valve and lower inlet valve one and three are opened, and gas, upper pressure is discharged in upper compression chamber group one and three, lower compression chamber two
Contracting chamber group two, lower compression chamber one and three suck gas, and, to be drawn through journey under upper row, the gas being discharged experienced lower compression chamber group for this
Three, two and one compression of accumulation step by step.Upper and lower compression unit is alternately discharged into storage after carrying out accumulation compression step by step to gas respectively
Gas chamber；When the spool of reversal valve is in middle position, the medical fluid in the indoor gas of gas storage and medicine cavity is without output；The spool of reversal valve
When in left position, the indoor gas of gas storage enters right cylinder cavity through appendix and main piston and auxiliary piston is pushed to move downward, medicine cavity
Chinese medicine liquid is exported through perfusion tube and syringe needle；When the spool of reversal valve is placed in right position, the indoor gas of gas storage enters a left side through appendix
Cylinder chamber simultaneously pushes main piston to move right, and the gas in right cylinder cavity is discharged through appendix and reversal valve, main piston return；Replacement note
Emitter.
In the present invention, the height and radius of upper and lower compression chamber distinguish equal, the compression chamber number up and down in the same body cavity group
It measures equal；The maximum gas storage pressure of air storage chamber is Pmax=P0ηp{(1+α)/(1-α)[β+(1+α)/(1-α)]n-1- 1 }, in which: P0
For standard atmospheric pressure, ηpFor efficiency factor, α > 0 is the volume variation of the caused upper compression chamber of compression ratio, i.e. piezoelectric vibrator deformation
Amount and the ratio between the volume of upper compression chamber, β > 1 are the minimum value of upper compression chamber ratio of number contained by each adjacent upper compression chamber group, n >=
2 be the quantity of upper compression chamber group；In work, when two adjacent upper compression chamber groups are interconnected, i.e. valve block is opened therebetween, contain upper compression
The volume variable quantity of a fairly large number of upper compression chamber group of chamber is not less than the volume of the upper compression chamber group containing upper compression chamber negligible amounts
Variable quantity；To obtain maximum compression ratio, the height of upper compression chamber is equal to the deflection of piezoelectric vibrator central point, piezoelectric vibrator by etc.
The height of upper compression chamber is when thickness PZT4 chip is formed with brass substrate bondingηh、U0Respectively
Dynamic corrections coefficient and driving voltage, d31For piezoelectric constant, hpFor piezoelectric patches thickness, r is upper compression chamber radius.
Advantage and characteristic: it is exported using piezoelectric actuator and gas coupling control medical fluid, is easy to pass through driving voltage
Height accurately controls transfusion speed；It is not necessarily to erecting by overhang when intravenous injection, is moved easily and carries；Medical fluid does not connect with air
It touches, phenomena such as medical fluid is contaminated, gas enters blood vessel and backflow of blood will not occur, without guard in real time, securely and reliably；Muscle
And when subcutaneous injection, injection time can be extended as needed, avoid blood concentration in human body caused by manual bolus uneven
The problem of, help to improve pharmaceutical effectiveness.
Detailed description of the invention
Fig. 1 is the composition and cross-sectional view of the structure of drug injector in a preferred embodiment of the present invention；
Fig. 2 is the A-A cross-sectional view of Fig. 1；
Fig. 3 is the structural schematic diagram in a preferred embodiment of the present invention under drug injector working condition；
Fig. 4 is the structural schematic diagram of driver in a preferred embodiment of the present invention；
Fig. 5 is the structural schematic diagram of syringe in a preferred embodiment of the present invention；
Fig. 6 is the structural schematic diagram of main body in a preferred embodiment of the present invention
Fig. 7 is the B-B cross-sectional view of Fig. 6；
Fig. 8 is the bottom view of Fig. 6；
Fig. 9 is the structural schematic diagram of cabinet in a preferred embodiment of the present invention；
Figure 10 is the top view of Fig. 9.
Specific embodiment
The top of main body a is equipped with the cylinder chamber a11 and baffle a9 with sliding slot a10, and the centerline of cylinder chamber a11 is in horizontal plane
It is interior；The inside of cylinder chamber a11 is cased with main piston h, and the side wall ends of cylinder chamber a11 are equipped with cylinder cap g；Cylinder chamber a11 is separated by main piston h
Left cylinder cavity a13 and right cylinder cavity a14；Syringe z is made of cylindrantherae z1 and auxiliary piston z2, and auxiliary piston z2 is placed in cylindrantherae z1 and and medicine
Cylinder z1 constitutes medicine cavity z3, and the otic placode z4 of the one end cylindrantherae z1 is placed in the sliding slot a10 of baffle a9, the other end is provided with the defeated of syringe needle
Liquid pipe；The push rod of main piston h is stretched out through the through-hole on cylinder chamber left wall a12 and is acted against on the push rod of auxiliary piston z2；The bottom of main body a
Portion is equipped with enterprising stomata a1, takes the boss a3 and at least two rotary table group Ai of outlet plenum a6, from left to right each rotary table group Ai institute
The quantity of the a2 containing rotary table is successively reduced；A rotary table a2 in each rotary table group Ai is equipped with enterprising oral cavity a4 and upper venthole a5,
Upper vent hole a8 is provided only on other rotary table a2；Enterprising oral cavity a4 in the rotary table group Ai of the leftmost side is connected to enterprising stomata a1, most
Upper venthole a5 in the rotary table group Ai of right side is connected to upper outlet chamber a6；Upper venthole a5 and upper ventilation in same rotary table group Ai
Hole a8 is connected to through upper intercommunicating pore a7, and the enterprising oral cavity a4 in two or so adjacent rotary table group Ai is connected to upper venthole a5；Upper inlet
It is cantilever that the chamber a4 and upper outlet chamber a6 and valve block n installed in it, which respectively constitutes upper inlet valve vi and upper outlet valve v, valve block n,
Beam valve or disc valve；The top of cabinet b is equipped with lower air inlet b1, the vestibule b3 of leukorrhagia outlet plenum b6, is connected to lower outlet plenum b6
Air storage chamber b9 and distinguish equal body cavity group Bi and body cavity b2 with rotary table group Ai and its contained rotary table a2 quantity；Each body cavity group Bi
In a body cavity b2 be equipped on lower inlet chamber b4 and lower production well b5, other body cavity b2 and be provided only with lower venthole b8；It is most left
Lower inlet chamber b4 in lateral body chamber group Bi is connected to lower air inlet b1, the lower production well b5 in the body cavity group Bi of the rightmost side and lower outlet
Chamber b6 connection；Lower production well b5 in same body cavity group Bi is connected to lower venthole b8 through lower intercommunicating pore b7, and other two or so
Lower inlet chamber b4 in adjacent body cavity group Bi is connected to lower production well b5；Lower inlet chamber b4 and lower outlet plenum b6 and its in installed
Valve block n respectively constitute lower inlet valve Vi and lower outlet valve V；Main body a is mounted on cabinet b through screw, and boss a3 is placed in vestibule
In b3 and it is connected to upper outlet chamber a6 with lower outlet plenum b6 and air storage chamber b9；Rotary table a2 is placed in body cavity b2 and sealed circle will drive
Dynamic device D is crimped in body cavity b2, and sealing ring is located at the two sides driver D or more, and driver D is by two piezoelectric vibrator d and among it
The washer d0 of crimping is constituted, and piezoelectric vibrator d is bonded by substrate d1 and piezoelectric patches d2, and piezoelectric patches d2 is installed close to washer d0,
The surface of piezoelectric vibrator d is coated with insulated paint or is bonded with insulation film；When two piezoelectric vibrator d are acted on by voltage in driver D
Bending deformation direction it is identical, the deformation direction of driver D is the deformation direction of two piezoelectric vibrator d；Driver D and sealing
Circle respectively constitutes compression chamber c and lower compression chamber C with main body a and cabinet b, and the upper compression chamber c in same body cavity group Bi is simultaneously unified into
Upper compression chamber group ci, lower compression chamber C simultaneously be unified into push contracting chamber group Ci, each upper compression chamber group ci be connected into compression unit, it is each under
Compression chamber group Ci is connected into lower compression unit, and upper and lower compression unit is in parallel；In work, the change of same body cavity group Bi inner driver D
Shape direction is identical, in two adjacent body cavity group Bi driver D deformation direction on the contrary, up and down compression unit respectively to gas carry out by
Air storage chamber b9 is alternately discharged into after grade accumulation compression；Left cylinder cavity a13 is connect through appendix with reversal valve e, and right cylinder cavity a14 is through gas transmission
Pipe and reversal valve e are connected with air storage chamber b9；Reversal valve e is three-position four-way valve.
In the present invention, rotary table group Ai, body cavity group Bi, upper inlet valve vi, lower inlet valve Vi, upper compression chamber group ci, lower compression
The serial number of i representative from right to left in chamber group Ci, i=1,2,3 ...；With tool, there are three compress under upper compression chamber group ci and three
For the drug injector of chamber group Ci, from right to left, rotary table group Ai is successively defined as one A1 of rotary table group, two A2 and three A3, body cavity
Group Bi is successively defined as one B1 of body cavity group, two B2 and three B3, and upper inlet valve vi is successively defined as one v1 of upper inlet valve, two v2 and three
V3, lower inlet valve Vi are successively defined as one V1 of lower inlet valve, two V2 and three V3, and upper compression chamber group ci is successively defined as compression chamber
One c1 of group, two c2 and three c3, lower compression chamber group Ci are successively defined as lower one C1 of compression chamber group, two C2 and three C3, then specific works
Process are as follows: in upper half, the driver D in body cavity group one B1 and three B3 is bent downwardly, the driver D in two B2 of body cavity group is upward
Bending, upper inlet valve one v1 and three v3, two V2 of lower inlet valve and lower outlet valve V are opened, two v2 of upper inlet valve, upper outlet valve v and
Lower inlet valve one V1 and three V3 are closed, and upper one c1 of compression chamber group and three c3, two C2 of lower compression chamber suck gas, upper compression chamber group two
Gas is discharged in c2, lower compression chamber one C1 and three C3, and, to be drained through journey under upper suction, the gas being discharged experienced compression chamber group three for this
The accumulation step by step of c3, two c2 and a c1 are compressed；In lower half, the driver D in body cavity group one B1 and three B3 is bent upwards, body cavity
Driver D in two B2 of group is bent downwardly, and upper inlet valve one v1 and three v3, two V2 of lower inlet valve and lower outlet valve V are closed, enterprising
Two v2 of mouth valve, upper outlet valve v and lower inlet valve one V1 and three V3 are opened, upper one c1 of compression chamber group and three c3, two C2 of lower compression chamber
Gas is discharged, upper two c2 of compression chamber group, lower compression chamber one C1 and three C3 suck gas, this is discharged to be drawn through journey under upper row
Gas experienced the compression of accumulation step by step of lower three C3 of compression chamber group, two C2 and a C1.Upper and lower compression unit respectively carries out gas
Air storage chamber b9 is alternately discharged into after accumulation compression step by step；Gas and medicine when the spool of reversal valve e is in middle position, in air storage chamber b9
Medical fluid in chamber z3 is without output；When the spool of reversal valve e is in left position, the gas in air storage chamber b9 enters right cylinder through appendix
Chamber a14 simultaneously pushes main piston h and auxiliary piston z2 to move downward, and medicine cavity z3 Chinese medicine liquid is exported through perfusion tube and syringe needle；Reversal valve e's
When spool is placed in right position, the gas in air storage chamber b9 enters left cylinder cavity a13 through appendix and main piston h is pushed to move right, right
Gas in cylinder chamber a14 is discharged through appendix and reversal valve e, and main piston h resets；Replace syringe z.
In the present invention, height and the radius difference of upper compression chamber c and lower compression chamber C are equal, in the same body cavity group Bi
Upper compression chamber c is equal with the quantity of lower compression chamber C；The maximum gas storage pressure of air storage chamber b9 is Pmax=P0ηp{(1+α)/(1-α)[β
+(1+α)/(1-α)]n-1- 1 }, in which: P0For standard atmospheric pressure, ηpFor efficiency factor, α > 0 is compression ratio, i.e. piezoelectric vibrator d change
The ratio between the volume of the volume variable quantity of upper compression chamber c and upper compression chamber c caused by shape, β > 1 is each adjacent upper compression chamber group ci institute
Minimum value containing upper compression chamber c ratio of number, n >=2 are the quantity of upper compression chamber group ci；In work, two adjacent upper compression chamber groups
When ci is interconnected, i.e. therebetween valve block n is opened, the volume variable quantity of a fairly large number of upper compression chamber group ci containing upper compression chamber c is not
Less than the volume variable quantity of the upper compression chamber group ci containing upper compression chamber c negligible amounts；To obtain maximum compression ratio, upper compression chamber c
Height be equal to the deflection of piezoelectric vibrator d central point, piezoelectric vibrator d forms by equal thickness PZT4 chip and brass substrate bonding
When on the height of compression chamber c beηh、U0Respectively dynamic corrections coefficient and driving voltage, d31For pressure
Electric constant, hpFor the thickness of piezoelectric patches d2, r is the radius of upper compression chamber c.
Claims (1)
1. a kind of drug injector of piezoelectric patches driving, it is characterised in that: body top is equipped with cylinder chamber, and the side wall ends of cylinder chamber fill
There is cylinder cap, main piston covers intracavitary in cylinder and is divided into left right cylinder cavity；The cylindrantherae of syringe is fixed on the top of main body, cylindrantherae
Inside it is cased with auxiliary piston；The push rod of main piston is stretched out and is acted against on the push rod of auxiliary piston through the through-hole in cylinder chamber left wall: main body bottom
Portion is equipped with enterprising stomata, takes the boss and at least two rotary table groups of outlet plenum, from left to right the number of rotary table contained by each rotary table group
Amount is successively reduced；A rotary table in each rotary table group is equipped with enterprising oral cavity and upper venthole, is provided only on other rotary tables logical
Stomata；Enterprising outlet plenum and the valve block installed in it respectively constitute terminal valve；The top of cabinet is equipped with lower air inlet, band
The vestibule of lower outlet plenum distinguishes equal body cavity with the air storage chamber of lower outlet plenum connection and with rotary table group and its contained rotary table quantity
Group and body cavity；A body cavity in each body cavity group is equipped with lower inlet chamber and lower production well, is provided only with lower ventilation on other body cavitys
Hole；For main body on the cabinet, it is intracavitary and make up and down that outlet plenum and air storage chamber are connected that boss is placed in hole；Rotary table is placed in body cavity simultaneously
Driver is crimped in body cavity by sealed circle, and driver is made of the washer of two piezoelectric vibrators and its intermediate crimping；Driving
Device and sealing ring and main body and cabinet respectively constitute compression chamber up and down, and the compression chamber up and down in same body cavity group respectively and is unified into
Lower compression chamber group, each upper compression chamber group and each lower compression chamber group are connected into compression unit up and down respectively, and upper and lower compression unit is in parallel；
In work, the deformation direction of same body cavity group inner driver is identical, and the deformation direction of driver is opposite in two adjacent body cavity groups；It is left
Cylinder chamber is connect through appendix with reversal valve, and right cylinder cavity is connected through appendix and reversal valve with air storage chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910191939.3A CN109771739B (en) | 2019-03-01 | 2019-03-01 | Piezoelectric piece driven medicine injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910191939.3A CN109771739B (en) | 2019-03-01 | 2019-03-01 | Piezoelectric piece driven medicine injector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109771739A true CN109771739A (en) | 2019-05-21 |
| CN109771739B CN109771739B (en) | 2021-02-26 |
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ID=66489195
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910191939.3A Active CN109771739B (en) | 2019-03-01 | 2019-03-01 | Piezoelectric piece driven medicine injector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109771739B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111134791A (en) * | 2020-01-08 | 2020-05-12 | 浙江省人民医院 | Platelet-rich plasma implantation and fixation device special for bone joint repair |
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|---|---|---|---|---|
| US4561856A (en) * | 1983-08-18 | 1985-12-31 | Cochran Ulrich D | Infusion pump |
| DE3621846A1 (en) * | 1986-06-30 | 1988-01-21 | Winsel August | GAS POWERED DOSING DEVICE |
| DE19809483A1 (en) * | 1998-03-06 | 1999-09-30 | Daum Gmbh | Injecting apparatus for injecting fluid into the human body |
| CN1714759A (en) * | 2004-05-28 | 2006-01-04 | 伊西康内外科公司 | Bi-directional infuser pump with volume braking for hydraulically controlling an adjustable gastric band |
| CN201684249U (en) * | 2010-01-29 | 2010-12-29 | 亓仲亮 | Air pressure boosting liquid medicine injector |
| CN102678528A (en) * | 2012-05-23 | 2012-09-19 | 浙江师范大学 | Series-parallel hybrid-driven piezoelectric pump |
| CN102836478A (en) * | 2006-10-26 | 2012-12-26 | 马林克罗特有限公司 | Medical fluid injector having a thermo-mechanical driver |
| CN106443054A (en) * | 2016-06-15 | 2017-02-22 | 浙江师范大学 | Pipe flow velocity monitor |
-
2019
- 2019-03-01 CN CN201910191939.3A patent/CN109771739B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4561856A (en) * | 1983-08-18 | 1985-12-31 | Cochran Ulrich D | Infusion pump |
| DE3621846A1 (en) * | 1986-06-30 | 1988-01-21 | Winsel August | GAS POWERED DOSING DEVICE |
| DE19809483A1 (en) * | 1998-03-06 | 1999-09-30 | Daum Gmbh | Injecting apparatus for injecting fluid into the human body |
| CN1714759A (en) * | 2004-05-28 | 2006-01-04 | 伊西康内外科公司 | Bi-directional infuser pump with volume braking for hydraulically controlling an adjustable gastric band |
| CN102836478A (en) * | 2006-10-26 | 2012-12-26 | 马林克罗特有限公司 | Medical fluid injector having a thermo-mechanical driver |
| CN201684249U (en) * | 2010-01-29 | 2010-12-29 | 亓仲亮 | Air pressure boosting liquid medicine injector |
| CN102678528A (en) * | 2012-05-23 | 2012-09-19 | 浙江师范大学 | Series-parallel hybrid-driven piezoelectric pump |
| CN106443054A (en) * | 2016-06-15 | 2017-02-22 | 浙江师范大学 | Pipe flow velocity monitor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111134791A (en) * | 2020-01-08 | 2020-05-12 | 浙江省人民医院 | Platelet-rich plasma implantation and fixation device special for bone joint repair |
| CN111134791B (en) * | 2020-01-08 | 2021-04-16 | 浙江省人民医院 | Platelet-rich plasma implantation and fixation device special for bone joint repair |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109771739B (en) | 2021-02-26 |
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