CN102872487A - Check valve for dialysis and one-way control device for dialysis - Google Patents
Check valve for dialysis and one-way control device for dialysis Download PDFInfo
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- CN102872487A CN102872487A CN201210403478XA CN201210403478A CN102872487A CN 102872487 A CN102872487 A CN 102872487A CN 201210403478X A CN201210403478X A CN 201210403478XA CN 201210403478 A CN201210403478 A CN 201210403478A CN 102872487 A CN102872487 A CN 102872487A
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- dialysis
- valve
- joint
- check valve
- fastener
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- 238000000502 dialysis Methods 0.000 title claims abstract description 65
- 239000007788 liquid Substances 0.000 claims abstract description 52
- 210000000988 bone and bone Anatomy 0.000 claims description 6
- 230000000295 complement effect Effects 0.000 claims description 3
- 230000008602 contraction Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 11
- 239000012530 fluid Substances 0.000 description 9
- 239000000385 dialysis solution Substances 0.000 description 7
- 238000001631 haemodialysis Methods 0.000 description 7
- 230000000322 hemodialysis Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 239000008280 blood Substances 0.000 description 5
- 210000004369 blood Anatomy 0.000 description 5
- 238000007789 sealing Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 230000007812 deficiency Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000003053 toxin Substances 0.000 description 2
- 231100000765 toxin Toxicity 0.000 description 2
- 208000030090 Acute Disease Diseases 0.000 description 1
- 208000001647 Renal Insufficiency Diseases 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 208000022831 chronic renal failure syndrome Diseases 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 201000006370 kidney failure Diseases 0.000 description 1
- 239000006193 liquid solution Substances 0.000 description 1
- 230000007721 medicinal effect Effects 0.000 description 1
- 230000003204 osmotic effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000001338 self-assembly Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000001225 therapeutic effect Effects 0.000 description 1
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Abstract
The invention provides a check valve for dialysis and a one-way control device for dialysis. The check valve for dialysis is provided with a first connector, a second connector and a valve body, wherein a valve cavity is formed by the assembled parts of the first connector and the second connector, and the valve body is arranged in the valve cavity; the valve body comprises a valve sleeve and an elastic valve plug, and a buckle is arranged on the elastic valve plug; the elastic valve plug is arranged in the valve sleeve, and the buckle is arranged at one end of the valve sleeve, so that the elastic valve plug can elastically stretch to separate from or attach to the valve sleeve; the valve sleeve is of an umbrella-shaped structure, and comprises a tubular part, an umbrella rib part and an annular board; and the elastic valve plug is provided with a column part, a conical part and a snap ring. The one-way control device for dialysis comprises the check valve for dialysis, a connecting tube and a back pressure valve, wherein one end of the connecting tube is connected with the second connector, and the other end of the connecting tube is connected with the back pressure valve. According to the check valve for dialysis and the one-way control device for dialysis, one-way flowing of liquid can be accurately controlled, and the liquid is prevented from back flowing.
Description
Technical field
The present invention relates to the armarium technical field, particularly relate to a kind of dialysis with check valve and dialysis unidirectional control device.
Background technology
Hemodialysis is one of effective means of the various acute and chronic renal failure diseases for the treatment of, by carrying out hemodialysis, and life-span that can the proper extension patient.Hemodialysis technology is relatively ripe, and the quality that further improves hemodialysis becomes one of developing direction of patients with renal failure treatment.
Carrying out hemodialysis adopts dialysis machine, dialyser and corresponding connecting line to carry out usually, endovascular liquid and dialysis solution need to be pumped to dialyser, the flow direction of dialysis solution is opposite with direction of flow of blood in dialyser, blood and dialysis solution are under the pressure-acting of osmotic pressure and dialysis solution, toxin and moisture in the blood exchange, the dialysis solution that contains toxin is got rid of from the dialysis solution drain pipe, and the blood of dialysing is delivered to human vas again.
In dialysis procedure, liquid comprises effectively accurately flowing of blood and dialysis solution, just can guarantee patient's medical effect even life.Because the flow direction of liquid is very crucial, therefore, existing dialyser adopts various check valves to control the one-way flow of liquid usually.
The joint of common two connections of check valve of the prior art, the opposite end of two joints consists of valve pocket, and diaphragm is set in valve pocket, diaphragm moves when fluid pressure reaches certain value, so that liquid one-way flowing, and diaphragm sealing when fluid pressure is not enough, thereby realize the unidirectional control of liquid.
Because the ballast pump of dialyser is when work, the exit of ballast pump can produce very large pressure and change, and the diaphragm of check valve produces certain deformation under pressure easily, can't accomplish effective sealing, so the phenomenon that liquid flows backwards unavoidably can occur when ballast pump is worked.Because the requirement of hemodialysis is very strict, therefore, check valve of the prior art can not meet the demands.
Therefore, not enough for prior art, provide a kind of can the liquid with precise control one-way flow dialysis with check valve and dialysis with unidirectional control device to overcome very necessity of prior art deficiency.
Summary of the invention
The object of the invention is to avoid the deficiencies in the prior art part and provide a kind of dialysis to use unidirectional control device with check valve and dialysis, this dialysis can effectively be controlled liquid one-way flowing with check valve and dialysis with unidirectional control device, the generation of the phenomenon of avoiding flowing backwards.
Purpose of the present invention realizes by following technical measures.
A kind of dialysis check valve is provided with the first joint, the second joint and valve body, and the part of described the first joint and the assembling of described the second joint consists of valve pocket, and described valve body is assemblied in described valve pocket;
Described valve body comprises valve pocket and Elastic valve core, described valve pocket is fixed by the internal face of described the second joint and an end of described the first joint, described Elastic valve core is provided with fastener, described Elastic valve core be assemblied in described valve pocket and described fastener be assemblied in described valve pocket an end so that described Elastic valve core can elastic telescopic to separate with described valve pocket or to fit.
Above-mentioned valve pocket is set to beveled structure, and described valve pocket comprises tube, umbrella flank and annular plate surface;
Described umbrella flank is made of plural rib, has the space between adjacent two ribs, and described rib is umbrella to be arranged, and an end of every root bone is fixedly connected with described annular plate surface, and the other end of every root bone is fixedly connected with described tube;
The internal face of described annular plate surface and described the second joint is sealed and matched, and an end of described the first joint is connected to described annular plate surface, and described annular plate surface is fixed by the internal face of described the second joint and an end of described the first joint;
Described Elastic valve core also is provided with cylindrical portion, taper section and snap ring, and described cylindrical portion one end is fixedly connected with the small end of described taper section, and the described cylindrical portion other end is fixedly connected with described fastener, and the large end of described taper section is fixedly connected with described snap ring;
Described cylindrical portion is assemblied in described tube and described fastener snapping is assemblied in described tube one end, and described taper section is assemblied in described umbrella flank, and described snap ring is assemblied in described annular plate surface.
OnState the second joint be provided with for the assembling end of described the first joint assembling, consist of connecting section and the liquid outlet of described valve pocket, the two ends of described connecting section respectively with described assembling end be connected liquid outlet and be connected, described connecting section is gradually contraction structure from described assembling end to described liquid outlet, and the internal diameter of described liquid outlet is less than the external diameter of described annular plate surface.
OnState annular plate surface and be provided with the groove that is complementary with described snap ring, described snap ring is assemblied in described groove.
OnState tube, described umbrella flank and described annular plate surface and be set to integrated formed structure, described fastener, described cylindrical portion, described taper section and described snap ring are set to integrated formed structure, and described assembling end, described connecting section and described liquid outlet are set to integrated formed structure.
OnState fastener and be set to cone structure, the diameter of described fastener is greater than the external diameter of described cylindrical portion.
OnState the diameter of fastener greater than the external diameter 2-10mm of described cylindrical portion.
OnState the diameter of fastener greater than the external diameter 3-6mm of described cylindrical portion.
OnThe dialysis check valve of stating also is provided with locking nut, and the outside wall surface of described the first joint is provided with screw thread, and described locking nut is sheathed on described the second joint and assembles with described the first joint screw thread.
A kind of dialysis unidirectional control device has the described dialysis check valve of above-mentioned any one, also is provided with connection tube and counterbalance valve, and an end of described connection tube is connected with described the second joint, and the other end of described connection tube is connected with described counterbalance valve.
A kind of dialysis check valve of the present invention is provided with the first joint, the second joint and valve body, and the part of described the first joint and the assembling of described the second joint consists of valve pocket, and described valve body is assemblied in described valve pocket; Described valve body comprises valve pocket and Elastic valve core, described valve pocket is fixed by the internal face of described the second joint and an end of described the first joint, described Elastic valve core is provided with fastener, described Elastic valve core be assemblied in described valve pocket and described fastener be assemblied in described valve pocket an end so that described Elastic valve core can elastic telescopic to separate with described valve pocket or to fit.This dialysis, can be guaranteed to separate with valve pocket or fit at the pressure bottom spool because Elastic valve core is provided with fastener with check valve.When occurring fluid pressure in the dialysis procedure and change greatly, the effect of drawing of the button of fastener can prevent the Elastic valve core distortion, prevents that liquid refluence phenomenon from occuring, thus the liquid with precise control one-way flow.
A kind of dialysis unidirectional control device of the present invention, has the described dialysis check valve of above-mentioned any one, also be provided with connection tube and counterbalance valve, an end of described connection tube is connected with described the second joint, and the other end of described connection tube is connected with described counterbalance valve.This dialysis can be controlled liquid one-way flowing with the check valve of unidirectional control device setting, prevents from flowing backwards.By setting up counterbalance valve, so that just can carry out one-way flow when only having the pressure serious offense certain value of liquid, control liquid one-way flowing effect is better.
Description of drawings
The present invention is further illustrated to utilize accompanying drawing, but the content in the accompanying drawing does not consist of any limitation of the invention.
Fig. 1 is that a kind of dialysis of the present invention used the structural representation of check valve;
Fig. 2 is the decomposing schematic representation of Fig. 1;
Fig. 3 is " A-A " cutaway view that removes the nut part of Fig. 1;
Fig. 4 is that a kind of dialysis of the present invention used the structural representation of unidirectional control device.
In Fig. 1 to Fig. 4, comprising:
The first joint 100,
Screw thread 110,
The second joint 200,
Assembling end 210,
Connecting section 220,
Valve body 300,
Valve pocket 310,
Tube 311,
Umbrella flank 312,
Elastic valve core 320,
Fastener 321,
Taper section 323,
Snap ring 324,
Locking nut 400,
Connection tube 500,
Counterbalance valve 600.
The specific embodiment
The invention will be further described with the following Examples.
Embodiment 1.
A kind of dialysis check valve, as shown in Figure 1 to Figure 3, the part that is provided with the first joint 100, the second joint 200 and valve body 300, the first joints 100 and 200 assemblings of the second joint consists of valve pocket, and valve body 300 is assemblied in valve pocket.
Valve body 300 comprises valve pocket 310 and Elastic valve core 320, valve pocket 310 is fixed by the internal face of the second joint 200 and an end of the first joint 100, Elastic valve core 320 is provided with fastener 321, Elastic valve core 320 be assemblied in valve pocket 310 and fastener 321 be assemblied in valve pocket 310 an end so that Elastic valve core 320 can elastic telescopic to separate with valve pocket 310 or to fit.
This dialysis is common and ballast pump assembling use with check valve, the balance delivery side of pump is connected liquid to be pumped into the first joint 100 with the first joint 100, the pressure-acting of liquid is so that Elastic valve core 320 separates with valve pocket 310, and liquid enters the second joint 200 by Elastic valve core 320 gaps and discharges by the second joint 200.When fluid pressure was not enough, Elastic valve core 320 returned under the elastic pulling force effect of fastener 321 and valve pocket 310 fitting tights, and liquid then can not enter the second joint 200.
This dialysis with the Elastic valve core 320 of check valve by fastener 321 is set, fastener 321 and valve pocket 310 assemblings, when fluid pressure reaches certain threshold values, fluid pressure will be washed Elastic valve core 320 open so that Elastic valve core 320 separates with valve pocket 310.Since fastener 321 stretch the effect of drawing, the pressure that produces during the ballast pump action can not reach this dialysis with the opening pressure of check valve, thereby can better control the liquid one-way flowing phenomenon generation that prevents from flowing backwards.
In addition because the end assembling of fastener 321 and valve pocket 310, the pulling force effect of fastener 321 will so that Elastic valve core 320 not can with valve pocket 310 between separate and excessively depart from, can prevent to a certain extent Elastic valve core 320 distortion.
In addition, because the existence of fastener 321, Elastic valve core 320 leaves the distance of valve pocket 310 and can unrestrictedly not leave, and is convenient to the liquid with precise control flow.
Concrete, valve pocket 310 is set to beveled structure, and valve pocket 310 comprises tube 311, umbrella flank 312 and annular plate surface 313.
The internal face of annular plate surface 313 and the second joint 200 is sealed and matched, and an end of the first joint 100 is connected to annular plate surface 313, and annular plate surface 313 is fixed by the internal face of the second joint 200 and an end of the first joint 100.
Elastic valve core 320 also is provided with cylindrical portion 322, taper section 323 and snap ring 324, and cylindrical portion 322 1 ends are fixedly connected with the small end of taper section 323, and cylindrical portion 322 other ends are fixedly connected with fastener 321, and the large end of taper section 323 is fixedly connected with snap ring 324.
Usually, the diameter of fastener 321 can satisfy the demands greater than the external diameter 2-10mm of cylindrical portion 322, and the actual size of fastener 321 and cylindrical portion 322 can determine flexibly according to concrete needs.
The second joint 200 be provided with for the assembling end 210 of the first joint 100 assembling, consist of connecting section 220 and the liquid outlet 230 of valve pocket, are connected with liquid outlet with assembling end 210 respectively and are connected in the two ends of connecting section 220, connecting section 220 self-assembly ends 210 are gradually contraction structure to liquid outlet 230, and the internal diameter of liquid outlet 230 is less than the external diameter of annular plate surface 313.
Preferably, tube 311, umbrella flank 312 and annular plate surface 313 are set to integrated formed structure, have characteristics simple in structure, easy to assembly.
Preferably, fastener 321, cylindrical portion 322, taper section 323 and snap ring 324 are set to integrated formed structure, and assembling end 210, connecting section 220 and liquid outlet 230 are set to integrated formed structure, have characteristics simple in structure, easy to assembly.
In order to realize better locating effect, this dialysis is provided with screw thread 110 with the outside wall surface that check valve also is provided with locking nut 400, the first joints 100, and locking nut 400 is sheathed on the second joint 200 and assembles with the first joint 100 screw threads 110.By locking nut 400, the first joint 100, the second joint 200 firmly are assemblied in one.
Need to prove, in order to realize the good location effect, be not limited only to be undertaken by locking nut 400, also can be by assembling with realizations such as buckle modes between other locking device and the first joint 100.
In sum, this dialysis can be controlled liquid one-way flowing with check valve, prevents from flowing backwards, and has characteristics simple in structure, with low cost, easy to use.
Embodiment 2.
A kind of dialysis check valve, other structure is identical with embodiment 1, and difference is: the diameter of fastener 321 not only can be realized locating effect and simple in structure and low in cost greater than the external diameter 3-6mm of cylindrical portion 322.
Embodiment 3.
A kind of dialysis unidirectional control device, as shown in Figure 4, have the described dialysis check valve of embodiment 1 or 2 any one, also be provided with connection tube 500 and counterbalance valve 600, one end of connection tube 500 is connected with the second joint 200, and the other end of connection tube 500 is connected with counterbalance valve 600.The structure of counterbalance valve 600 is general knowledge known in this field, does not repeat them here.
Unidirectional control device is used in this dialysis, except valve pocket 310 and Elastic valve core 320, also is provided with counterbalance valve 600.The arranging of counterbalance valve 600 improved the opening pressure threshold value of this dialysis with unidirectional control device, namely only has when the pressure of liquid during greater than the opening pressure of counterbalance valve 600, and liquid just can carry out one-way flow.
By increasing counterbalance valve 600, for this dialysis provides a stable pressure-regulating device with unidirectional control device, can control more efficiently and effectively circulation and the cut-off of liquid.Only have when ballast pump offers this dialysis could conducting during greater than the conducting pressure of counterbalance valve 600 with the pressure of unidirectional control device, liquid just can flow out from the exit of counterbalance valve 600, in case the pressure that dialysis machine provides during less than the conducting pressure of counterbalance valve 600 then umbrella valve close at once, liquid stops to flow.
In the dialyser technical field, usually by design check valve is arranged at corresponding liquid one-way flowing pipeline, think in theory and can realize that by check valve liquid is set one-way flow the phenomenon that flows backwards can not occur.But practice is found, select two kinds of check valves that unlike material is made, exporting it namely, the second joint 200 directly is connected with a conduit and vertical placement, the first joint 100 down, water column is housed in the conduit, owing to counterbalance valve 600 one-way flow effects, the water column in the conduit should not flow backwards and flow out from the first joint 100 in theory.But practical situation is: a kind of check valve of material is until water column just can be accomplished good sealing effectiveness during greater than 40 centimetres, can occur the more serious phenomenon of leakage at water column less than 40 centimetres of interval check valves of this section, and the check valve of another kind of material is until water column just can be accomplished good sealing effectiveness during greater than 20 centimetres.
If water-column is considerably beyond 40 centimetres, the check valve made of the two kinds of materials seepage that all do not flow backwards fully then.
So a kind of dialysis unidirectional control device is provided, increase by a counterbalance valve 600 in dialysis with the check valve basis, when counterbalance valve 600 is adjusted to certain pressure, dialysis can be realized good sealing effectiveness with check valve.Not only can get rid of the impact that the check valve of unlike material causes the whole system flow by increasing counterbalance valve, and the one-way flow of liquid with precise control more.
The dialysis that two kinds of materials are prepared from is installed on the compound ballast pump of haemodialysis control unit with unidirectional control device, when flow system flow during at 30 L/h, when the counterbalance valve 600 at ballast pump outlet two ends is adjusted to 80KPa, the total amount of liquid difference that records the ballast pump two ends of flowing through after a hour through experiment repeatedly is no more than 20ml, error rate is no more than 0.067%, as seen the error rate that increases behind the counterbalance valve 600 is in the allowed band of machine, realized flow is controlled accurately, realized good therapeutic effect.
This dialysis can realize good control effect to the flow equilibrium of whole system with unidirectional control device.Counterbalance valve 600 is regulated the size of pressure and the flow of system, and the pressure size of the caliber of conduit and the porch of ballast pump is relevant.Thereby user also can reach reasonable control effect when can make this device be fit to various environment according to the pressure of above condition adjusting counterbalance valve 600.This dialysis has increased counterbalance valve with unidirectional control device, provides stable pressure-regulating device by counterbalance valve, circulation and cut-off that can effective and rapid control liquid.Just conducting when only having the pressure that offers this device when body greater than the conducting pressure of counterbalance valve, liquid flows out from the counterbalance valve exit, in case the pressure that the pump housing provides during less than the conducting pressure of counterbalance valve then dialyse and close with check valve at once, liquid stops to flow.
In sum, this dialysis can be controlled liquid one-way flowing with unidirectional control device, prevents from flowing backwards, and has characteristics simple in structure, with low cost, easy to use.
Should be noted that at last; above embodiment is only in order to illustrate technical scheme of the present invention but not limiting the scope of the invention; although with reference to preferred embodiment the present invention has been done detailed description; those of ordinary skill in the art is to be understood that; can make amendment or be equal to replacement technical scheme of the present invention, and not break away from essence and the scope of technical solution of the present invention.
Claims (10)
1. dialysis check valve is characterized in that: be provided with the first joint, the second joint and valve body, the part of described the first joint and the assembling of described the second joint consists of valve pocket, and described valve body is assemblied in described valve pocket;
Described valve body comprises valve pocket and Elastic valve core, described valve pocket is fixed by the internal face of described the second joint and an end of described the first joint, described Elastic valve core is provided with fastener, described Elastic valve core be assemblied in described valve pocket and described fastener be assemblied in described valve pocket an end so that described Elastic valve core can elastic telescopic to separate with described valve pocket or to fit.
2. dialysis check valve according to claim 1: described valve pocket is set to beveled structure, and described valve pocket comprises tube, umbrella flank and annular plate surface;
Described umbrella flank is made of plural rib, has the space between adjacent two ribs, and described rib is umbrella to be arranged, and an end of every root bone is fixedly connected with described annular plate surface, and the other end of every root bone is fixedly connected with described tube;
The internal face of described annular plate surface and described the second joint is sealed and matched, and an end of described the first joint is connected to described annular plate surface, and described annular plate surface is fixed by the internal face of described the second joint and an end of described the first joint;
Described Elastic valve core also is provided with cylindrical portion, taper section and snap ring, and described cylindrical portion one end is fixedly connected with the small end of described taper section, and the described cylindrical portion other end is fixedly connected with described fastener, and the large end of described taper section is fixedly connected with described snap ring;
Described cylindrical portion is assemblied in described tube and described fastener snapping is assemblied in described tube one end, and described taper section is assemblied in described umbrella flank, and described snap ring is assemblied in described annular plate surface.
3. dialysis check valve according to claim 2, it is characterized in that: described the second joint be provided with for the assembling end of described the first joint assembling, consist of connecting section and the liquid outlet of described valve pocket, the two ends of described connecting section respectively with described assembling end be connected liquid outlet and be connected, described connecting section is gradually contraction structure from described assembling end to described liquid outlet, and the internal diameter of described liquid outlet is less than the external diameter of described annular plate surface.
4. dialysis check valve according to claim 3, it is characterized in that: described annular plate surface is provided with the groove that is complementary with described snap ring, and described snap ring is assemblied in described groove.
5. dialysis check valve according to claim 4, it is characterized in that: described tube, described umbrella flank and described annular plate surface are set to integrated formed structure, described fastener, described cylindrical portion, described taper section and described snap ring are set to integrated formed structure, and described assembling end, described connecting section and described liquid outlet are set to integrated formed structure.
6. dialysis check valve according to claim 5, it is characterized in that: described fastener is set to cone structure, and the diameter of described fastener is greater than the external diameter of described cylindrical portion.
7. dialysis check valve according to claim 6, it is characterized in that: the diameter of described fastener is greater than the external diameter 2-10mm of described cylindrical portion.
8. dialysis check valve according to claim 7, it is characterized in that: the diameter of described fastener is greater than the external diameter 3-6mm of described cylindrical portion.
9. dialysis check valve according to claim 8, it is characterized in that: also be provided with locking nut, the outside wall surface of described the first joint is provided with screw thread, described locking nut be sheathed on described the second joint and with described the first joint screw thread assembling.
10. dialysis unidirectional control device, it is characterized in that: have the described dialysis check valve of claim 1 to 9 any one, also be provided with connection tube and counterbalance valve, an end of described connection tube is connected with described the second joint, and the other end of described connection tube is connected with described counterbalance valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210403478.XA CN102872487B (en) | 2012-10-22 | 2012-10-22 | Check valve for dialysis and one-way control device for dialysis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210403478.XA CN102872487B (en) | 2012-10-22 | 2012-10-22 | Check valve for dialysis and one-way control device for dialysis |
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| CN102872487A true CN102872487A (en) | 2013-01-16 |
| CN102872487B CN102872487B (en) | 2015-01-28 |
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| CN201210403478.XA Active CN102872487B (en) | 2012-10-22 | 2012-10-22 | Check valve for dialysis and one-way control device for dialysis |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105363086A (en) * | 2015-12-04 | 2016-03-02 | 重庆本善医疗设备有限公司 | Peritoneal dialysis device |
| CN105571893A (en) * | 2014-10-17 | 2016-05-11 | 茂名华粤机电设备有限公司 | Closed sampling device with fast connectors |
| CN108025140A (en) * | 2015-11-30 | 2018-05-11 | 崔荣哲 | Syringe filtering assembly and syringe and transfusion device assembly |
| CN111093734A (en) * | 2017-09-11 | 2020-05-01 | 康尔福盛303公司 | Umbrella type check valve |
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| CN202909174U (en) * | 2012-10-22 | 2013-05-01 | 贝恩医疗设备(广州)有限公司 | One-way valve for dialysis and one-way control device for dialysis |
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| US4340080A (en) * | 1977-03-11 | 1982-07-20 | Compagnie Generale Des Etablissements Michelin | Inflation valve |
| US5172720A (en) * | 1992-02-03 | 1992-12-22 | Eaton Corporation | Single seal fluid control valve |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105571893A (en) * | 2014-10-17 | 2016-05-11 | 茂名华粤机电设备有限公司 | Closed sampling device with fast connectors |
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| CN111093734A (en) * | 2017-09-11 | 2020-05-01 | 康尔福盛303公司 | Umbrella type check valve |
| US11662033B2 (en) | 2017-09-11 | 2023-05-30 | Carefusion 303, Inc. | Umbrella check valve |
| US12098774B2 (en) | 2017-09-11 | 2024-09-24 | Carefusion 303, Inc. | Umbrella check valve |
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| CN102872487B (en) | 2015-01-28 |
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