CN106668993A - Filtering injection needle - Google Patents
Filtering injection needle Download PDFInfo
- Publication number
- CN106668993A CN106668993A CN201610897781.8A CN201610897781A CN106668993A CN 106668993 A CN106668993 A CN 106668993A CN 201610897781 A CN201610897781 A CN 201610897781A CN 106668993 A CN106668993 A CN 106668993A
- Authority
- CN
- China
- Prior art keywords
- check valve
- valve
- needle stand
- madial wall
- rear end
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
- A61J1/00—Containers specially adapted for medical or pharmaceutical purposes
- A61J1/14—Details; Accessories therefor
- A61J1/20—Arrangements for transferring or mixing fluids, e.g. from vial to syringe
- A61J1/2003—Accessories used in combination with means for transfer or mixing of fluids, e.g. for activating fluid flow, separating fluids, filtering fluid or venting
- A61J1/2006—Piercing means
- A61J1/201—Piercing means having one piercing end
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
- A61J1/00—Containers specially adapted for medical or pharmaceutical purposes
- A61J1/14—Details; Accessories therefor
- A61J1/20—Arrangements for transferring or mixing fluids, e.g. from vial to syringe
- A61J1/2003—Accessories used in combination with means for transfer or mixing of fluids, e.g. for activating fluid flow, separating fluids, filtering fluid or venting
- A61J1/2079—Filtering means
- A61J1/2086—Filtering means for fluid filtration
-
- 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
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
- A61M5/34—Constructions for connecting the needle, e.g. to syringe nozzle or needle hub
- A61M5/344—Constructions for connecting the needle, e.g. to syringe nozzle or needle hub using additional parts, e.g. clamping rings or collets
-
- 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
- A61M2205/75—General characteristics of the apparatus with filters
- A61M2205/7509—General characteristics of the apparatus with filters for virus
-
- 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
- A61M2205/75—General characteristics of the apparatus with filters
- A61M2205/7518—General characteristics of the apparatus with filters bacterial
-
- 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
- A61M2205/75—General characteristics of the apparatus with filters
- A61M2205/7545—General characteristics of the apparatus with filters for solid matter, e.g. microaggregates
Abstract
The invention provides a filtering injection needle. The needle comprises a steel needle, an upper needle base, a lower needle base, a check valve and a filtering film. The rear end of the upper needle base is provided with a lower needle base cavity and a check valve cavity. The check valve cavity comprises a round-table-shape inner side wall and a column-shape inner side wall. The small end surface of the round-table-shape inner side wall is provided with an annular groove. The center of the annular groove is communicated with a steel needle installation hole. The big end of the round-table-shape inner side wall is connected with the column-shape inner side wall. The round-table-shape inner side wall is provided with a groove connected with the annular groove. The front end of the lower needle base is provided with a connection part. The center of the connection part is provided with a spool. The filtering film is arranged at the rear end of the spool. The check valve comprises a sealing cover, a check valve cylinder body and a check valve conical table. The sealing cover is rotationally arranged at the front end of the check valve cylinder body. The check valve cylinder body is arranged on the spool in a sleeve mode. The connection part coordinates with the lower needle cavity in a shrink-fit mode. According to the filtering injection needle, the filtering and injecting processes are carried out automatically without the necessity of needle replacement, and therefore the possibility of bacterial and virus contamination is ruled out.
Description
Technical field
The invention belongs to medical instruments field, more particularly, to a kind of injection needle is filtered.
Background technology
It is well known that be encapsulated in vial the injection of Clinical practice at present more, with the syringe needle of syringe prick rubber stopper or
When cutting vial extraction liquid with emery wheel, bottle stopper material bits or glass powder can be entered in parenteral solution.Traditional syringe does not have
There is filtering function, these impurity can be extracted into syringe when extracting liquid medicine and direct injection is to patient, it is quiet so as to induce
The diseases such as arteries and veins inflammation.
Chinese invention patent application CN102600535A, discloses a kind of injection needle with accurate filter, including needle tubing
With the needle stand with inner via hole, the needle stand inner via hole is including the larger bottom in the less top in aperture, aperture and with gradually
The pars intermedia of reduced bore structure is collected upwards, and described needle tubing one end is placed in the top of the inner via hole, and the interior of the needle stand leads to
A filter is provided with hole.Because the injection needle feed pathway and liquid outlet channel are same passages, need after filtration again
Change and exist by the risk of the pollution of bacterium or virus in injection needle, but filtering needle and injection needle Renewal process, while
Clinical manipulation is also inconvenient.
The content of the invention
It is an object of the invention to provide a kind of simple structure, easy to operate, safe and reliable filtration injection needle, during injection
Syringe needle need not be changed, it is to avoid the possibility of bacterium and virus pollution.
The technical scheme is that：Filter injection needle, including draw point, upper needle stand, lower needle stand, check valve and filtration
Film, draw point is arranged on the front end of upper needle stand, and the rear end of lower needle stand is connected on the conehead of syringe, and the upper needle stand rear end is provided with
Lower needle stand chamber and unidirectional valve pocket, unidirectional valve pocket includes truncated cone-shaped madial wall and inner cylindrical sidewall, the small end of truncated cone-shaped madial wall
End face is provided with annular groove, and center and the draw point installing hole of annular groove are connected, big end and the cylinder of truncated cone-shaped madial wall
Madial wall is connected, and truncated cone-shaped madial wall is provided with groove, and one end of groove is connected with annular groove, the rear end of the lower needle stand
Conehead chamber is provided with, the front end of lower needle stand is provided with columnar connecting portion, and the center of connecting portion is provided with columnar valve element, valve element
Rear end is connected with the front end in conehead chamber, and the check valve includes closure, check valve cylinder and check valve frustum, and closure can revolve
What is turned is arranged on the front end of check valve cylinder, and the small end of check valve frustum is connected with the front end outer side wall of check valve cylinder, institute
It is annular to state filter membrane, and the interior circular diameter of filter membrane is equal to the external diameter of valve element, and the outside diameter of filter membrane is equal to the interior of connecting portion
Footpath, filter membrane is set in the rear end of valve element, and check valve cylinder is set on valve element, the side surface of check valve frustum and unidirectional valve pocket
Truncated cone-shaped madial wall is engaged, and the connecting portion inserts lower needle stand chamber inside and the interference fit between lower needle stand chamber.
Circumference uniform distribution is provided with multiple grooves on truncated cone-shaped madial wall.
Circumference uniform distribution is provided with 4 grooves on truncated cone-shaped madial wall.
Check valve barrel front end madial wall is provided with annular protrusion, and the closure is rotatably arranged on annular protrusion
On.
The internal diameter of the closure is equal to the internal diameter of annular protrusion, and the sidewall thickness of the closure is equal to annular protrusion
Thickness, closure side wall is connected with annular protrusion forward end, closure side wall and annular protrusion coupling part
Length is equal to the 1/5-1/4 of annular protrusion girth.
The rear end of the valve element is provided with columnar valve core case, and the external diameter of valve core case is more than the external diameter of valve element, valve core case
Internal diameter is equal to the internal diameter of valve element, and the rear end of valve core case is connected with the front end in conehead chamber.
The back end circumference of the valve core case is laid with multiple connecting corners, the end of a right-angle side of connecting corner with
Valve element base rear end is connected, and the end of another right-angle side of connecting corner is connected with conehead chamber leading inside wall.
The madial wall in the lower needle stand chamber is provided with multiple annular projections.
The check valve also includes check valve ring surface, the inner circle phase vertical with check valve cylinder lateral wall of check valve ring surface
Even, the cylindrical of check valve ring surface is connected with check valve frustum lower end.
The check valve frustum rear end is provided with the cylindrical side wall being engaged with inner cylindrical sidewall.
The present invention has the advantages and positive effects that：The filtration and injection process for filtering injection needle is carried out automatically, only
The filtering liquid medicine when medicine is taken out, without filtering during injection, syringe need not change syringe needle, it is to avoid bacterium and virus pollution can
Can property.The present invention filters injection needle and has overall structure simple, easy to operate, safe and reliable, low cost, single use,
The advantages of being prevented effectively from cross-infection and occur.
Description of the drawings
Fig. 1 is the explosive view that the present invention filters injection needle
Fig. 2 is needle stand side view in the present invention
Fig. 3 is needle stand top view in the present invention
Fig. 4 is needle stand dimensional structure diagram in the present invention
Fig. 5 is needle stand side view under the present invention
Fig. 6 is needle stand top view under the present invention
Fig. 7 is one-way valve structures schematic diagram of the present invention
Fig. 8 is feed liquor status architecture schematic diagram of the present invention
Fig. 9 is that the present invention goes out liquid status structural representation
In figure：
1st, draw point 2, upper needle stand 3, check valve 4, filter membrane 5, lower needle stand
21st, draw point installing hole 22, groove 23, unidirectional valve pocket 24, lower needle stand chamber 31, closure
32nd, check valve cylinder 33, check valve frustum 34, check valve ring surface 35, annular protrusion 51, connecting portion
52nd, valve element 53, valve core case 54, connecting corner 55, conehead chamber 56, fluid hole
231st, truncated cone-shaped madial wall 232, inner cylindrical sidewall
Specific embodiment
As shown in Fig. 1, Fig. 8, Fig. 9, injection needle, including draw point 1, upper needle stand 2, lower needle stand 5, check valve 3 and mistake are filtered
Filter membrane 4, draw point 1 is arranged on the front end of upper needle stand 2, and the rear end of lower needle stand 5 is connected on the conehead of syringe.Such as Fig. 2, Fig. 3, figure
Shown in 4, lower needle stand chamber 24 and unidirectional valve pocket 23 are provided with the rear end of upper needle stand 2, unidirectional valve pocket 23 includes the He of truncated cone-shaped madial wall 231
Inner cylindrical sidewall 232, the small end end face of truncated cone-shaped madial wall 231 is provided with annular groove, and center and the draw point of annular groove are pacified
Dress hole 21 is connected, and the big end of truncated cone-shaped madial wall 231 is connected with inner cylindrical sidewall 232, sets on truncated cone-shaped madial wall 232
Fluted 22, one end of groove 22 is connected with annular groove, and as shown in Figure 5, Figure 6, the rear end of lower needle stand 5 is provided with conehead chamber 55,
The front end of lower needle stand 5 is provided with columnar connecting portion 51, and the center of connecting portion 51 is provided with columnar valve element 52, after valve element 52
End is connected with the front end in conehead chamber 55, as shown in fig. 7, check valve 3 includes closure 31, check valve cylinder 32 and check valve frustum
33, closure 31 is rotatably arranged on the front end of check valve cylinder 32, small end and the check valve cylinder 32 of check valve frustum 33
Front end outer side wall be connected.Filter membrane 4 is annular, and the interior circular diameter of filter membrane 4 is equal to the external diameter of valve element 52, filter membrane 4
Outside diameter is equal to the internal diameter of connecting portion 51, and filter membrane 4 is set in the rear end of valve element 52, and check valve cylinder 32 is set in valve element 52
On, the side surface of check valve frustum 33 is engaged with the truncated cone-shaped madial wall 231 of unidirectional valve pocket 23, the lower needle stand chamber of the insertion of connecting portion 51
24 inside and between lower needle stand chamber 24 interference fit.
As shown in Figure 3, Figure 4, on truncated cone-shaped madial wall 231 can circumference uniform distribution be provided with multiple grooves 22.Preferably, in round platform
Circumference uniform distribution is provided with 4 grooves 22 on shape madial wall 231, and the internal diameter of inner cylindrical sidewall 232 is less than the internal diameter in lower needle stand chamber 24.
The rear end side wall of valve element 52 directly can be connected with the madial wall of conehead chamber 55, and be provided with can be by between liquid
Gap.As shown in Figure 5, Figure 6, the rear end of valve element 52 can also be provided with columnar valve core case 53, and the external diameter of valve core case 53 is more than valve
The external diameter of core 52, the internal diameter of valve core case 53 is equal to the internal diameter of valve element 52, and the rear end of valve core case 53 is connected with the front end in conehead chamber 55.
The setting of valve core case 53 makes valve element 52 more firm, it is to avoid injection pressure is crossed senior general's valve element 52 and damaged.The rear end circle of valve core case 52
It is laid with multiple connecting corners 54 week, the end of a right-angle side of connecting corner 54 is connected with the rear end of valve core case 52, even
The end for connecing another right-angle side at turning 54 is connected with the leading inside wall of conehead chamber 55.Liquid can pass through connecting corner 54
Between gap flow through.Connecting corner 52 firmly couples together valve core case 53 and the madial wall of conehead chamber 55, it is to avoid injection pressure
Power is excessive and causes the damage of valve element 52.
Multiple annular projections are provided with the madial wall in lower needle stand chamber 24.Annular protrusion can improve the inner side of lower needle stand chamber 24
The bonding strength connected between wall and the lateral wall of connecting portion 51 and sealing effectiveness.
As shown in fig. 7, the unidirectional leading inside wall of valve cylinder 32 is provided with annular protrusion 35, closure 31 is rotatably arranged on
On annular protrusion 35.Preferably, the internal diameter of closure 31 is equal to the internal diameter of annular protrusion 35, and the sidewall thickness of closure 31 is equal to
The thickness of annular protrusion 35, that is, the lower end of the side wall of closure 31 is engaged with the upper end of annular protrusion 35, the side of closure 31
Wall lower end is connected with the forward end of annular protrusion 35, and the side wall lower ends of closure 31 are equal to the coupling part length of annular protrusion 35
The 1/5-1/4 of the girth of annular protrusion 35.The sealing effectiveness when liquid is sucked of closure 31 can either so be ensured, again can
Make closure 31 around rotating with the tie point between annular protrusion 35, closure 31 is opened under conditions of liquid medicine injection.
Check valve 3 can also include check valve ring surface 34, the inner circle phase vertical with the side wall of check valve cylinder 32 of check valve ring surface 34
Even, the cylindrical of check valve ring surface 34 is connected with the lower end of check valve frustum 33.So can improve the side wall of check valve frustum 33 with
Sealing effectiveness between truncated cone-shaped madial wall 232.Further, the rear end of check valve frustum 33 can be provided with and inner cylindrical sidewall
232 cylindrical side walls being engaged.
The course of work of this example：
When liquid is sucked, as shown in figure 8, closure 31 is closed, liquid enters into the front end of needle stand 2 by draw point 1
In draw point installing hole 21, unidirectional valve pocket 23 is entered into by the groove 22 on truncated cone-shaped madial wall 231, in the presence of suction,
Check valve frustum 33 produces deformation, and the gap between check valve frustum 33 and truncated cone-shaped madial wall 232 is opened, and liquid is through cylinder
The gap of shape madial wall 232 and check valve frustum 33 greatly between end enters into the rear end of unidirectional valve pocket 24, then in the work of suction
Entered into the conehead chamber 55 of lower needle stand 5 from the gap between connecting corner 54 with the lower filter membrane 4 by annular.
In liquid medicine injection, as shown in figure 9, in the presence of thrust, check valve frustum 33 produces deformation, check valve frustum
Clearance seal between 33 side surfaces and truncated cone-shaped madial wall 231, the gap between connecting corner 54 returns to connecting portion
Liquid between 51 and valve element 52 cannot pass through the feed pathway between the side surface of check valve frustum 33 and truncated cone-shaped madial wall 232
Flow out, but the fluid hole 56 from the center of valve element 52 flows out, through closure 31, under the effect of the pressure closure 31 surround with
Tie point rotation between annular protrusion 35, the gap between closure 31 and the front end of check valve cylinder 32 is opened, and liquid is entered
To in unidirectional valve pocket 23, then enter into draw point 1 through unidirectional valve pocket 23.
One embodiment of the present of invention has been described in detail above, but the content is only the preferable enforcement of the present invention
Example, it is impossible to be considered as the practical range for limiting the present invention.All impartial changes made according to the present patent application scope and improvement
Deng, all should still belong to the present invention patent covering scope within.
Claims (10)
1. injection needle, including draw point, upper needle stand, lower needle stand, check valve and filter membrane are filtered, and draw point is arranged on before upper needle stand
End, the rear end of lower needle stand is connected on the conehead of syringe, it is characterised in that：The upper needle stand rear end is provided with lower needle stand chamber and list
To valve pocket, unidirectional valve pocket includes truncated cone-shaped madial wall and inner cylindrical sidewall, and the small end end face of truncated cone-shaped madial wall is provided with annular
Groove, center and the draw point installing hole of annular groove are connected, and the big end of truncated cone-shaped madial wall is connected with inner cylindrical sidewall,
Truncated cone-shaped madial wall is provided with groove, and one end of groove is connected with annular groove, and the rear end of the lower needle stand is provided with conehead chamber, under
The front end of needle stand is provided with columnar connecting portion, and the center of connecting portion is provided with columnar valve element, rear end and the conehead chamber of valve element
Front end be connected, the check valve includes closure, check valve cylinder and check valve frustum, and closure is rotatably arranged on list
To the front end of valve cylinder body, the small end of check valve frustum is connected with the front end outer side wall of check valve cylinder, and the filter membrane is ring
Shape, the interior circular diameter of filter membrane is equal to the external diameter of valve element, and the outside diameter of filter membrane is equal to the internal diameter of connecting portion, and filter membrane is arranged
In the rear end of valve element, check valve cylinder is set on valve element, the side surface of check valve frustum and unidirectional valve pocket truncated cone-shaped madial wall
It is engaged, the connecting portion inserts lower needle stand chamber inside and the interference fit between lower needle stand chamber.
2. filtration injection needle according to claim 1, it is characterised in that：Circumference uniform distribution is provided with many on truncated cone-shaped madial wall
Individual groove.
3. filtration injection needle according to claim 2, it is characterised in that：Circumference uniform distribution is provided with 4 on truncated cone-shaped madial wall
Individual groove.
4. filtration injection needle according to claim 1, it is characterised in that：Set on the check valve barrel front end madial wall
There is annular protrusion, the closure is rotatably arranged on annular protrusion.
5. filtration injection needle according to claim 4, it is characterised in that：The internal diameter of the closure is equal to annular protrusion
Internal diameter, the sidewall thickness of the closure is equal to the thickness of annular protrusion, closure side wall and annular protrusion front end end
Portion is connected, and closure side wall is equal to the 1/5-1/4 of annular protrusion girth with annular protrusion coupling part length.
6. filtration injection needle according to claim 5, it is characterised in that：The rear end of the valve element is provided with columnar valve
Core print seat, the external diameter of valve core case is more than the external diameter of valve element, and the internal diameter of valve core case is equal to the internal diameter of valve element, the rear end of valve core case and conehead
The front end in chamber is connected.
7. filtration injection needle according to claim 6, it is characterised in that：The back end circumference of the valve core case is laid with
Multiple connecting corners, the end of a right-angle side of connecting corner is connected with valve element base rear end, and another of connecting corner is straight
The end of the arm of angle is connected with conehead chamber leading inside wall.
8. filtration injection needle according to claim 7, it is characterised in that：The madial wall in the lower needle stand chamber is provided with many
Individual annular projection.
9. filtration injection needle according to claim 8, it is characterised in that：The check valve also includes check valve annular
Face, inner circle and the check valve cylinder lateral wall of check valve ring surface are vertically connected, the cylindrical and check valve frustum of check valve ring surface
Lower end is connected.
10. filtration injection needle according to claim 9, it is characterised in that：The check valve frustum rear end is provided with and circle
The cylindrical side wall that cylindricality madial wall is engaged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610897781.8A CN106668993A (en) | 2016-10-14 | 2016-10-14 | Filtering injection needle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610897781.8A CN106668993A (en) | 2016-10-14 | 2016-10-14 | Filtering injection needle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106668993A true CN106668993A (en) | 2017-05-17 |
Family
ID=58840066
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610897781.8A Pending CN106668993A (en) | 2016-10-14 | 2016-10-14 | Filtering injection needle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106668993A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109432549A (en) * | 2018-12-17 | 2019-03-08 | 山东威高集团医用高分子制品股份有限公司 | Filtering exudate syringe |
| CN109464726A (en) * | 2018-12-17 | 2019-03-15 | 山东威高集团医用高分子制品股份有限公司 | Unidirectional filtration syringe |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1946959A (en) * | 2004-05-19 | 2007-04-11 | 韦尔奈实验室公司 | Combination umbrella and inverted bi-directional valve |
| CN103721321A (en) * | 2014-01-26 | 2014-04-16 | 山东威高集团医用高分子制品股份有限公司 | Automatic filtration injector |
| CN104964077A (en) * | 2015-05-20 | 2015-10-07 | 天津斯维克阀业有限公司 | Bi-directional flow-limiting valve |
| CN206391311U (en) * | 2016-10-14 | 2017-08-11 | 山东威高集团医用高分子制品股份有限公司 | Filter injection needle |
-
2016
- 2016-10-14 CN CN201610897781.8A patent/CN106668993A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1946959A (en) * | 2004-05-19 | 2007-04-11 | 韦尔奈实验室公司 | Combination umbrella and inverted bi-directional valve |
| CN103721321A (en) * | 2014-01-26 | 2014-04-16 | 山东威高集团医用高分子制品股份有限公司 | Automatic filtration injector |
| CN104964077A (en) * | 2015-05-20 | 2015-10-07 | 天津斯维克阀业有限公司 | Bi-directional flow-limiting valve |
| CN206391311U (en) * | 2016-10-14 | 2017-08-11 | 山东威高集团医用高分子制品股份有限公司 | Filter injection needle |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109432549A (en) * | 2018-12-17 | 2019-03-08 | 山东威高集团医用高分子制品股份有限公司 | Filtering exudate syringe |
| CN109464726A (en) * | 2018-12-17 | 2019-03-15 | 山东威高集团医用高分子制品股份有限公司 | Unidirectional filtration syringe |
| CN109432549B (en) * | 2018-12-17 | 2023-12-29 | 山东威高集团医用高分子制品股份有限公司 | Liquid outlet filtering injector |
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Application publication date: 20170517 |