CN112957563A - Micro-injection pump for ICU department - Google Patents
Micro-injection pump for ICU department Download PDFInfo
- Publication number
- CN112957563A CN112957563A CN202110291203.0A CN202110291203A CN112957563A CN 112957563 A CN112957563 A CN 112957563A CN 202110291203 A CN202110291203 A CN 202110291203A CN 112957563 A CN112957563 A CN 112957563A
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- push block
- micro
- disc
- liquid inlet
- liquid outlet
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/142—Pressure infusion, e.g. using pumps
- A61M5/145—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons
- A61M5/1452—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons pressurised by means of pistons
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/44—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests having means for cooling or heating the devices or media
- A61M5/445—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests having means for cooling or heating the devices or media the media being heated in the reservoir, e.g. warming bloodbags
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2205/00—General characteristics of the apparatus
- A61M2205/36—General characteristics of the apparatus related to heating or cooling
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- Health & Medical Sciences (AREA)
- Vascular Medicine (AREA)
- Engineering & Computer Science (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
- Reciprocating Pumps (AREA)
Abstract
The invention provides a micro-injection pump for an ICU department, and belongs to the technical field of medical instruments. The electromagnetic adsorption device comprises an upper shell, a lower shell, a stepping motor, a clutch mechanism, a speed reducing mechanism, a liquid inlet pipe and a liquid outlet pipe, wherein the clutch mechanism comprises a combination disc fixed on an output shaft of the stepping motor and a separation disc rotationally connected to the lower shell, a plurality of electromagnetic blocks are uniformly arranged on the separation disc in the circumferential direction, and a plurality of adsorption blocks are arranged on the combination disc; the speed reducing mechanism comprises a valve post fixed on the separating disc, a push block connected to the lower end of the valve post in a sliding manner and an elastic part connected between the push block and the valve post, the elastic part is a spiral spring post with adjacent spring rings tightly attached, the upper end of the elastic part is fixedly connected with the valve post, the lower end of the elastic part is fixedly connected with the push block, and a pressure cavity is formed between the push block and the lower shell; a first check valve is arranged between the pressure cavity and the liquid inlet pipe, and a second check valve is arranged between the pressure cavity and the liquid outlet pipe. The invention has the advantages of low noise, simple structure and the like.
Description
Technical Field
The invention belongs to the technical field of medical instruments, and relates to a micro-injection pump for an ICU department.
Background
The existing medical injection pump drives a push rod to push an injector by a stepping motor, controls the running speed of the stepping motor and further controls the speed of a medicine injected into a patient; typically at a constant speed. The medical injection pump comprises a stepping motor, a multi-stage speed reducer, a clutch mechanism, a push rod and other components, and due to the fact that the multi-stage speed reducer and the clutch mechanism exist, the fit clearance between mechanical components and mechanical collision can form noise in the operation process of the injection pump, and in addition, the multi-stage speed reducer enables the structure to be complex and the size to be large.
Disclosure of Invention
The invention aims to provide a micro-injection pump for ICU department, aiming at the problems in the prior art, and the technical problem to be solved by the invention is how to reduce noise and simplify the structure.
The purpose of the invention can be realized by the following technical scheme: a micro-injection pump for an ICU department is characterized by comprising an upper shell, a lower shell fixedly connected with the upper shell, a stepping motor, a clutch mechanism, a speed reducing mechanism, a liquid inlet pipe and a liquid outlet pipe, wherein the body of the stepping motor is fixed in the upper shell; the speed reducing mechanism comprises a valve post fixed on the separating disc, a push block connected to the lower end of the valve post in a sliding mode and an elastic part connected between the push block and the valve post, the elastic part is a spiral spring post with adjacent spring rings attached tightly, the upper end of the elastic part is fixedly connected with the valve post, the lower end of the elastic part is fixedly connected with the push block, and a pressure cavity is formed between the push block and the lower shell; the push block is connected with the inner wall of the lower shell through a spline; and a first check valve is arranged between the pressure cavity and the liquid inlet pipe, and a second check valve is arranged between the pressure cavity and the liquid outlet pipe.
Furthermore, a compression spring in a stretching state is connected between the valve column and the push block.
Further, go up the casing outside and be provided with feed liquor buffer memory chamber and play liquid buffer memory chamber, the feed liquor pipe links to each other with feed liquor buffer memory chamber, the drain pipe links to each other with play liquid buffer memory chamber, check valve one sets up between feed liquor buffer memory chamber and pressure chamber, check valve two sets up between play liquid buffer memory chamber and pressure chamber.
Further, feed liquor buffer storage cavity and play liquid buffer storage cavity all are located the elastic component outside.
Furthermore, a sealing head is fixedly arranged at the lower end of the push block.
Furthermore, the elastic part is made of metal materials, and two ends of the elastic part are respectively connected with the positive electrode and the negative electrode of a power supply to form a resistance heating part.
Furthermore, an annular groove is formed between the valve column and the push block, and the elastic piece is located in the annular groove.
Furthermore, lubricating oil or lubricating grease is filled in the annular groove.
The annular groove is formed in the lower shell, so that the elastic part is wrapped by an annular area formed by the inner wall of the lower shell and the annular groove, and the elastic part is ensured to only longitudinally displace in the twisting process, namely, the pushing block is driven to be far away from the valve post due to the increase of the number of turns, and the pushing block is further extruded to the pressure cavity; the reset spring can ensure that the valve post and the push block are in a compression state, eliminate the gap between the adjacent rings of the elastic piece and ensure that the adjacent rings of the elastic piece are mutually abutted.
The combination disc fixedly connected with the output shaft of the stepping motor rotates for one circle, the height of a spring ring is increased by the total height of the elastic piece, namely the height corresponding to the section diameter of the spring ring of the elastic piece, so that the speed reduction of the stepping motor and the longitudinal extension of the push block are realized.
The electromagnetism piece is electricity magnetism subassembly that generates promptly, through the coil circular telegram produce the fast appeal of absorption to iron, realizes the synchronization of combination dish and separating disc, otherwise, when the coil outage of electromagnetism piece, combines dish and separating disc separation.
Controlling the power-on duration and the power-off duration of the electromagnetic block to control the combination time and the separation time of the combination disc and the separation disc, namely controlling the intermittent power-on and power-off of the electromagnetic block and maintaining a certain power-on or power-off duration, wherein the combination disc drives the separation disc to rotate within the power-on time of the electromagnetic block, namely the elastic part is subjected to the torque in the spiral direction, so that the number of turns of the elastic part is increased under the condition that the adjacent turns are mutually abutted, the push block moves downwards to pressurize the pressure cavity, at the moment, the first check valve is closed, the second check valve is opened, and the liquid in the pressure cavity enters the liquid outlet buffer cavity and is discharged from the liquid outlet pipe; when the electricity outage of electromagnetism piece, combination dish and separation disc separation, the motor is still operation, and combination dish is then reverse rotation, under reset spring and elastic component's effect, the ejector pad shifts up, and pressure chamber pressure reduces, and check valve one opens, and check valve two is closed, and the liquid entering pressure intracavity in the stock solution container of feed liquor union coupling.
The liquid inlet buffer cavity and the liquid outlet buffer cavity can buffer liquid, so that intermittent liquid inlet and outlet are weakened in the reciprocating motion process of the push block, and the purposes of continuous liquid inlet and continuous liquid outlet are achieved.
In addition, the elastic part is fixed at one end, and the adjacent rings rub with each other in the process of twisting the other end, so that the noise is extremely low under the condition that lubricating oil or lubricating grease exists, and the clutch mechanism is not in rigid contact, so that the noise of the micro-injection pump only comes from the stepping motor, and is much lower than the noise of the prior art.
The elastic piece is fixed at one end, and the relative slip between the adjacent rings is transmitted to the other end from the twisted end in the twisting process of the other end instead of being synchronously performed, so that the elastic piece is released, the push block is soft in the process of switching the moving direction, on one hand, the vibration of equipment can be reduced, on the other hand, the liquid entering and exiting can be smooth, and the liquid entering and exiting can be more continuous.
In order to preheat the infusion and enable the infusion temperature to be suitable for human body feeling, the elastic element can be a metal element, under the condition that two ends of the elastic element are respectively connected with the positive electrode and the negative electrode of a power supply, the liquid in the liquid inlet buffer cavity and the liquid outlet buffer cavity can be preheated, and meanwhile, a small amount of noise caused by creeping of the elastic element can be further blocked.
The reciprocating stroke of the push block is controlled to be at the height corresponding to the diameters of the three elastic pieces, namely the number of circles of the elastic pieces is increased by three circles when the elastic pieces are at the twisting limit position, and in the stroke, the spline structure between the push block and the lower shell cannot cover the moving area of the sealing head, so that the sealing head can isolate the pressure cavity, and liquid in the cavity is ensured not to be polluted.
The stepping motor runs at a constant speed, the on-off interval time of a coil in the electromagnetic block is controlled to adjust the pump volume, the control of the on-off duration time of the electromagnetic block is realized through a delay circuit, and the control of the delay time is realized through a corresponding program, which is a conventional means.
Drawings
FIG. 1 is a schematic view showing the structure of the micro-syringe pump in a liquid feed state.
FIG. 2 is a schematic view showing the structure of the micro-syringe pump in a liquid discharge state.
Fig. 3 is a schematic view of the structure of the separation discs and the coupling discs.
Fig. 4 is a sectional view taken along a-a in fig. 1.
In the figure, 11, the upper housing; 12. a lower housing; 2. a stepping motor; 31. a liquid inlet pipe; 32. a liquid outlet pipe; 41. a bonding pad; 42. a separation disc; 51. an electromagnetic block; 52. the adsorption is fast; 61. a spool; 62. a push block; 63. an elastic member; 64. a pressure chamber; 65. a sealing head; 71. a first check valve; 72. a second check valve; 8. a compression spring; 91. a liquid inlet buffer cavity; 92. and (4) liquid outlet buffer cavities.
Detailed Description
The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.
As shown in fig. 1, 2, 3 and 4, the electromagnetic adsorption device comprises an upper shell 11, a lower shell 12 fixedly connected with the upper shell 11, a stepping motor 2, a clutch mechanism, a speed reduction mechanism, a liquid inlet pipe 31 and a liquid outlet pipe 32, wherein a body of the stepping motor 2 is fixed in the upper shell 11, the clutch mechanism comprises a combination disc 41 fixed on an output shaft of the stepping motor 2 and a separation disc 42 rotatably connected on the lower shell 12, a gap is formed between the separation disc 42 and the combination disc 41, a plurality of electromagnetic blocks 51 are uniformly arranged on the separation disc 42 in the circumferential direction, and a plurality of iron adsorption blocks 52 corresponding to the electromagnetic blocks 51 one to one are arranged on the combination disc 41; the speed reducing mechanism comprises a valve post 61 fixed on the separating disc 42, a push block 62 connected to the lower end of the valve post 61 in a sliding manner, and an elastic part 63 connected between the push block 62 and the valve post 61, wherein the elastic part 63 is a spiral spring post with adjacent spring rings tightly attached, the upper end of the elastic part 63 is fixedly connected with the valve post 61, the lower end of the elastic part 63 is fixedly connected with the push block 62, and a pressure cavity 64 is formed between the push block 62 and the lower shell 12; the push block 62 is connected with the inner wall of the lower shell 12 through a spline; a first check valve 71 is arranged between the pressure cavity 64 and the liquid inlet pipe 31, and a second check valve 72 is arranged between the pressure cavity 64 and the liquid outlet pipe 32.
A compression spring 8 in a stretched state is connected between the spool 61 and the push block 62.
The outer side of the upper shell 11 is provided with a liquid inlet buffer cavity 91 and a liquid outlet buffer cavity 92, the liquid inlet pipe 31 is connected with the liquid inlet buffer cavity 91, the liquid outlet pipe 32 is connected with the liquid outlet buffer cavity 92, the first check valve 71 is arranged between the liquid inlet buffer cavity 91 and the pressure cavity 64, and the second check valve 72 is arranged between the liquid outlet buffer cavity 92 and the pressure cavity 64.
The liquid inlet buffer cavity 91 and the liquid outlet buffer cavity 92 are both positioned outside the elastic piece 63.
A sealing head 65 is fixedly arranged at the lower end of the pushing block 62.
The elastic member 63 is made of metal material, and two ends of the elastic member 63 are respectively connected with the positive electrode and the negative electrode of a power supply to form a resistance heating member.
An annular groove is formed between the spool 61 and the push block 62, and the elastic member 63 is located in the annular groove.
The ring groove is filled with lubricating oil or lubricating grease.
The annular groove is formed, so that the elastic part 63 is wrapped by an annular area formed by the inner wall of the lower shell 12 and the annular groove, the elastic part 63 is ensured to only longitudinally displace in the twisting process, namely, the pushing block 62 is driven to be far away from the valve post 61 due to the increase of the number of turns, and the pushing block 62 is further extruded to the pressure cavity 64; the return spring can ensure that the valve column 61 and the push block 62 are in a compressed state, eliminate the gap between adjacent rings of the elastic piece 63 and ensure that the adjacent rings of the elastic piece 63 are abutted against each other.
The coupling disc 41 fixedly connected to the output shaft of the stepping motor 2 rotates one revolution, and the overall height of the elastic member 63 is increased by one spring ring height, i.e., the height corresponding to the spring ring section diameter of the elastic member 63, thereby realizing the deceleration of the stepping motor 2 and the longitudinal extension and contraction of the push block 62.
The electromagnet block 51, i.e. the electromagnetic component, is energized by the coil to generate an attractive force to the iron adsorption block 52, so as to realize the synchronization of the combination disk 41 and the separation disk 42, whereas when the coil of the electromagnet block 51 is de-energized, the combination disk 41 is separated from the separation disk 42.
Controlling the power-on duration and the power-off duration of the electromagnetic block 51 to control the combination time and the separation time of the combination disc 41 and the separation disc 42, namely controlling the electromagnetic block 51 to be intermittently powered on and powered off and maintaining a certain power-on or power-off duration, wherein within the power-on duration of the electromagnetic block 51, the combination disc 41 drives the separation disc 42 to rotate, namely the elastic part 63 is subjected to the torque in the spiral direction, so that the number of turns of the elastic part 63 is increased under the condition that adjacent turns are abutted against each other, the push block 62 moves downwards to pressurize the pressure cavity 64, at the moment, the first check valve 71 is closed, the second check valve 72 is opened, and the liquid in the pressure cavity 64 enters the liquid outlet buffer cavity 92 and is discharged from the liquid outlet pipe 32; when the electromagnetic block 51 is powered off, the combining disc 41 is separated from the separating disc 42, the motor still operates, the combining disc 41 rotates reversely, the pushing block 62 moves upwards under the action of the return spring and the elastic element 63, the pressure of the pressure chamber 64 is reduced, the first check valve 71 is opened, the second check valve 72 is closed, and the liquid in the liquid storage container connected with the liquid inlet pipe 31 enters the pressure chamber 64.
The liquid inlet buffer cavity 91 and the liquid outlet buffer cavity 92 can buffer liquid, so that intermittent liquid inlet and outlet are weakened in the reciprocating motion process of the push block 62, and the purposes of continuous liquid inlet and continuous liquid outlet are achieved.
In addition, the elastic part 63 is fixed at one end, and the adjacent rings rub with each other in the process of twisting the other end, so that the noise is extremely low under the condition that lubricating oil or lubricating grease exists, and the clutch mechanism is not in rigid contact, so that the noise of the micro-injection pump only comes from the stepping motor 2, and the noise is much lower compared with the prior art.
The elastic piece 63 is fixed at one end, and in the process of twisting the other end, the relative sliding between the adjacent rings is transmitted from the twisted end to the other end instead of being synchronously performed, and the elastic piece 63 is also in the process of releasing, so that the push block 62 is soft in the process of switching the moving direction, on one hand, the vibration of the equipment can be reduced, on the other hand, the liquid inlet and outlet can be smooth, and the liquid inlet and outlet can be more continuous.
In order to preheat the infusion and make the infusion temperature suitable for human body feeling, the elastic element 63 can be a metal element, and under the condition that the two ends of the elastic element are respectively connected with the positive electrode and the negative electrode of a power supply, the liquid in the liquid inlet buffer cavity 91 and the liquid outlet buffer cavity 92 can be preheated, and meanwhile, a small amount of noise caused by creeping of the elastic element 63 can be further isolated.
The reciprocating stroke of the pushing block 62 is controlled to be at a height corresponding to the diameters of the three elastic members 63, that is, the number of turns of the elastic members 63 is increased by three turns at the twisting limit position, and in the stroke, the spline structure between the pushing block 62 and the lower shell 12 cannot cover the moving area of the sealing head 65, so that the sealing head 65 can isolate the pressure cavity 64, and the liquid in the cavity is ensured not to be polluted.
The stepping motor 2 runs at a constant speed, the on-off interval time of the coil in the electromagnetic block 51 is controlled to adjust the pump amount, the control of the on-off duration time of the electromagnetic block 51 is realized by a delay circuit, and the control of the delay time is realized by a corresponding program, which is a conventional means.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (8)
1. The micro-injection pump for the ICU department is characterized by comprising an upper shell (11), a lower shell (12) fixedly connected with the upper shell (11), a stepping motor (2), a clutch mechanism, a speed reducing mechanism, a liquid inlet pipe (31) and a liquid outlet pipe (32), wherein a machine body of the stepping motor (2) is fixed in the upper shell (11), the clutch mechanism comprises a combination disc (41) fixed on an output shaft of the stepping motor (2) and a separation disc (42) rotatably connected on the lower shell (12), a gap is formed between the separation disc (42) and the combination disc (41), a plurality of electromagnetic blocks (51) are uniformly arranged on the separation disc (42) in the circumferential direction, and a plurality of iron adsorption blocks (52) which correspond to the electromagnetic blocks (51) one to one are arranged on the combination disc (41); the speed reducing mechanism comprises a valve column (61) fixed on the separating disc (42), a push block (62) connected to the lower end of the valve column (61) in a sliding mode and an elastic piece (63) connected between the push block (62) and the valve column (61), the elastic piece (63) is a spiral spring column with adjacent spring rings attached tightly, the upper end of the elastic piece (63) is fixedly connected with the valve column (61), the lower end of the elastic piece (63) is fixedly connected with the push block (62), and a pressure cavity (64) is formed between the push block (62) and the lower shell (12); the push block (62) is connected with the inner wall of the lower shell (12) through a spline; a first check valve (71) is arranged between the pressure cavity (64) and the liquid inlet pipe (31), and a second check valve (72) is arranged between the pressure cavity (64) and the liquid outlet pipe (32).
2. An ICU micro-syringe pump according to claim 1, characterized in that a compression spring (8) is connected between the spool (61) and the push block (62) in tension.
3. The micro-injection pump for the ICU department as claimed in claim 1, wherein the upper shell (11) is provided with a liquid inlet buffer chamber (91) and a liquid outlet buffer chamber (92) at the outer side, the liquid inlet pipe (31) is connected with the liquid inlet buffer chamber (91), the liquid outlet pipe (32) is connected with the liquid outlet buffer chamber (92), the first check valve (71) is arranged between the liquid inlet buffer chamber (91) and the pressure chamber (64), and the second check valve (72) is arranged between the liquid outlet buffer chamber (92) and the pressure chamber (64).
4. An ICU micro-syringe pump according to claim 1 or 2 or 3 characterised in that the inlet buffer chamber (91) and the outlet buffer chamber (92) are located outside the elastic member (63).
5. An ICU micro-syringe pump according to claim 1, 2 or 3 characterised in that the lower end of the push block (62) is fixedly provided with a sealing head (65).
6. A micro-syringe pump for ICU department according to claim 1, 2 or 3 wherein the elastic member (63) is made of metal material, and both ends of the elastic member (63) are connected to the positive and negative electrodes of a power supply respectively to form a resistance heating member.
7. An ICU micro syringe pump according to claim 1 or 2 or 3, characterized in that an annular groove is formed between the spool (61) and the push block (62), and the elastic member (63) is located in the annular groove.
8. A micro syringe pump for ICU department according to claim 7 wherein the ring groove is filled with lubricating oil or grease.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110291203.0A CN112957563B (en) | 2021-03-18 | 2021-03-18 | Micro-injection pump for ICU department |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110291203.0A CN112957563B (en) | 2021-03-18 | 2021-03-18 | Micro-injection pump for ICU department |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112957563A true CN112957563A (en) | 2021-06-15 |
| CN112957563B CN112957563B (en) | 2022-09-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110291203.0A Active CN112957563B (en) | 2021-03-18 | 2021-03-18 | Micro-injection pump for ICU department |
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| Country | Link |
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| CN (1) | CN112957563B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020156464A1 (en) * | 2001-03-01 | 2002-10-24 | Brian Blischak | Non-constant pressure infusion pump |
| US20040127852A1 (en) * | 2002-12-26 | 2004-07-01 | John Gray | Infusion device having piston operated driving mechanism and positive pressure reservoir |
| US20130123703A1 (en) * | 2010-07-22 | 2013-05-16 | Ofer Shay | Pulse infusion device system and method |
| US20140180210A1 (en) * | 2011-09-02 | 2014-06-26 | Roche Diagnostics Operations, Inc. | Dosing Unit for an Ambulatory Infusion Device |
| CN104653426A (en) * | 2015-01-20 | 2015-05-27 | 天津农学院 | High-precision plunger type trace sampling pump |
| CN105662531A (en) * | 2015-12-30 | 2016-06-15 | 中国人民解放军第二军医大学 | Pulse transfusion micropump |
| CN205411827U (en) * | 2015-12-11 | 2016-08-03 | 中国人民解放军第二军医大学 | Piston infusion micropump |
| CN107638611A (en) * | 2017-10-31 | 2018-01-30 | 湖南中医药大学 | A kind of electronic infusion device of novel non-contact |
| CN110732057A (en) * | 2018-07-20 | 2020-01-31 | 贝克顿·迪金森公司 | Reciprocating pump |
-
2021
- 2021-03-18 CN CN202110291203.0A patent/CN112957563B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020156464A1 (en) * | 2001-03-01 | 2002-10-24 | Brian Blischak | Non-constant pressure infusion pump |
| US20040127852A1 (en) * | 2002-12-26 | 2004-07-01 | John Gray | Infusion device having piston operated driving mechanism and positive pressure reservoir |
| US20130123703A1 (en) * | 2010-07-22 | 2013-05-16 | Ofer Shay | Pulse infusion device system and method |
| US20140180210A1 (en) * | 2011-09-02 | 2014-06-26 | Roche Diagnostics Operations, Inc. | Dosing Unit for an Ambulatory Infusion Device |
| CN104653426A (en) * | 2015-01-20 | 2015-05-27 | 天津农学院 | High-precision plunger type trace sampling pump |
| CN205411827U (en) * | 2015-12-11 | 2016-08-03 | 中国人民解放军第二军医大学 | Piston infusion micropump |
| CN105662531A (en) * | 2015-12-30 | 2016-06-15 | 中国人民解放军第二军医大学 | Pulse transfusion micropump |
| CN107638611A (en) * | 2017-10-31 | 2018-01-30 | 湖南中医药大学 | A kind of electronic infusion device of novel non-contact |
| CN110732057A (en) * | 2018-07-20 | 2020-01-31 | 贝克顿·迪金森公司 | Reciprocating pump |
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| Publication number | Publication date |
|---|---|
| CN112957563B (en) | 2022-09-06 |
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