CA1148823A - One-way valve for parenteral apparatus - Google Patents
One-way valve for parenteral apparatusInfo
- Publication number
- CA1148823A CA1148823A CA000348970A CA348970A CA1148823A CA 1148823 A CA1148823 A CA 1148823A CA 000348970 A CA000348970 A CA 000348970A CA 348970 A CA348970 A CA 348970A CA 1148823 A CA1148823 A CA 1148823A
- Authority
- CA
- Canada
- Prior art keywords
- valve
- way valve
- orifice
- outlet orifice
- valve member
- 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.)
- Expired
Links
- 239000012530 fluid Substances 0.000 claims abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 12
- 239000003182 parenteral nutrition solution Substances 0.000 claims abstract description 8
- 239000004033 plastic Substances 0.000 claims abstract description 6
- 229920003023 plastic Polymers 0.000 claims abstract description 6
- 239000011148 porous material Substances 0.000 claims description 12
- 239000000243 solution Substances 0.000 claims description 6
- 239000008280 blood Substances 0.000 claims description 4
- 210000004369 blood Anatomy 0.000 claims description 4
- 239000004703 cross-linked polyethylene Substances 0.000 claims description 4
- 230000005484 gravity Effects 0.000 claims description 3
- 239000006260 foam Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 4
- 238000010276 construction Methods 0.000 abstract 1
- 238000007789 sealing Methods 0.000 description 6
- 229920003020 cross-linked polyethylene Polymers 0.000 description 2
- 239000006261 foam material Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000011344 liquid material Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000136 polysorbate Polymers 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
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
- A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
- A61M39/22—Valves or arrangement of valves
- A61M39/24—Check- or non-return valves
-
- 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
- A61M5/168—Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
- F16K15/021—Check valves with guided rigid valve members the valve member being a movable body around which the medium flows when the valve is open
- F16K15/023—Check valves with guided rigid valve members the valve member being a movable body around which the medium flows when the valve is open the valve member consisting only of a predominantly disc-shaped flat element
-
- 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
- A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
- A61M39/22—Valves or arrangement of valves
- A61M39/24—Check- or non-return valves
- A61M2039/2433—Valve comprising a resilient or deformable element, e.g. flap valve, deformable disc
-
- 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
- A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
- A61M39/22—Valves or arrangement of valves
- A61M39/24—Check- or non-return valves
- A61M2039/2433—Valve comprising a resilient or deformable element, e.g. flap valve, deformable disc
- A61M2039/2446—Flexible disc
- A61M2039/2466—Flexible disc being fixed in its center
Landscapes
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Heart & Thoracic Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- Public Health (AREA)
- Biomedical Technology (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Engineering & Computer Science (AREA)
- General Health & Medical Sciences (AREA)
- Anesthesiology (AREA)
- Veterinary Medicine (AREA)
- Vascular Medicine (AREA)
- Pulmonology (AREA)
- Mechanical Engineering (AREA)
- Check Valves (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
- Prostheses (AREA)
Abstract
NEH:em #3656 ONE-WAY VALVE FOR PARENTERAL APPARATUS
Abstract of the Disclosure A one-way valve which effects positive and sen-sitive action as well as simplified construction in a parenteral solution administration device. Preferably, the valve is formed of a resilient, foamed plastic mater-ial with a flat surface on one side to engage an inlet orifice and has a projection on the opposite side. The disc valve is free to move within the valve body and is laterally spaced therefrom to permit fluid flow around the side wall. The outlet orifice has projections which allow flow between the projections and into the outlet orifice.
Abstract of the Disclosure A one-way valve which effects positive and sen-sitive action as well as simplified construction in a parenteral solution administration device. Preferably, the valve is formed of a resilient, foamed plastic mater-ial with a flat surface on one side to engage an inlet orifice and has a projection on the opposite side. The disc valve is free to move within the valve body and is laterally spaced therefrom to permit fluid flow around the side wall. The outlet orifice has projections which allow flow between the projections and into the outlet orifice.
Description
~1--Bac~ground of the Invention This invention relates to a one-way disc valve which is buoyant in the liquid material in which it is to be used. More particularly, this invention relates S to a disc-type check valve for use in a parenteral solu-tion or blood administration apparatus wherein the disc valve is constructed of a porous material so as to be sensitive to fluid flow and to be operable without ex-tensive back pressure.
Check valves of the type concerned with in this invention are described in U. S. Patents 2,879,784;
Check valves of the type concerned with in this invention are described in U. S. Patents 2,879,784;
2,989,052; 4,005,710 and 4,046,011. The problems with many of these prior art check valves is that they are designed to operate in a valving system wherein some back pressures are required in order to force the check valve against an inlet orifice or while they are de-signed to float, they depend upon the force of gravity to close an outlet orifice. Examples of the floating-ball-type valve are described in U. S. Patents 2,~79,784 and 2,989,052. Check valves of the disc or flat type are described in U. S. 4,005,710 and 4,046,011. In none of these prior art patents is there described a check valve body which is formed of a porous material so that it can respond quickly and precisely to fluid flow with-out requiring extensive back pressure.
It is an advantage of the present invention to provide a novel one-way valve which is extremely sensitive to fluid flow so that it can close off an orifice without appreciable back pressures. Other advantages are a valv-ing structure which can be composed of readily made material; can be mass produced and assembled in a fast and efficient manner; can be easily sterilized and can be made from an inexpensive material so that it is dispos-able.
Summary of the Invention The foregoing advantages are accomplished and the shortcomings of the prior art are overcome by the valving device of this invention which is comprised of a valve body defining opposing end walls and a lateral side wall surface with an intake orifice and an outlet orifice in the end walls. ~ freely movable valve member pre-sents a substantially flat, flexible and smooth surface for contact with the intake orifice when the valve body is filled with fluid. The valve ~ lS porous and has a specific gravity less than that of the fluid which prefer-ably is a parenteral solution or blood. In a preferred man-ner, the intake orifice also includes an annular member extending from the orifice for contact with the movable valve member with the annular member being composed of a pliable material. Also preferably, the porous material forming the valve ~ ~ lS an elastomeric plastic composed of a cross-linked polyethylene foam having a density in the range of 2 - 6 pounds per cubic foot. The valve body is preferably formed from two telescoping tubular members with the outlet surface defined by one of the tubular mem-bers which is of a smaller diameter. Preferably, the tubular member defining the outlet orifice forms a Y-type tubular junction to which is attached a needle assembly at one end and a solution containerj drip chamber and entry site for a fluid. at the opposite end.
Brief Description of the Drawings A better understanding of the one-way disc valve of this invention will be accomplished by reference to the drawing wherein:
FIGURE 1 is a perspective view of a parenteral solution administration device with the one-way disc valve forming a part thereof;
FIGURE 2 is a view in partial vertical section of the valving device showing the disc valve in the open position;
FIGURE 3 is a view similar to FIGURE 2 except showing the valving device in a closed position;
FIGURE 4 is an enlarged view in vertical section showing the valve member of this invention.
Description of the Preferred Embodiment Proceeding to a detailed description of a pre-ferred embodiment of the present invention, the one-way valve device 10 is shown in FIGURE 1 in conjunction with a flexible parenteral solution container 11 such as des-cribed in U. S. Patent 3,915,212. An air vented drip chamber 12 is interconnected thereto and a length of tub-ing 14 interconnects the drip chamber 12 with the tubular intake portion 16 of valve device 10. Similarly, a length of tubing 18 is interconnected to the outlet tubular por-tion 20 and ultimately to a hypodermic needle 21 by means of a Y-type injection site 22 with a length of tubing 23 connecting the needle and the injection site. A flow control clamp 15 is secured to tubing 18.
` 15 As best shown in FIGURES 2 and 3, tubular por-tions 16 and 20 are telescoped and spaced apart to form a valve body 24 with valve member 25 placed in the valve cavity 26. Vnder normal circumstances, tubular portion 16 will be the intake portlon of the valve device 10 and will define an intake orifice 27, with tubular portion 20 providing an outlet orifice 28. An annular sealing ring 30 extends from intake orifice 27 in end wall 29.
A laterial wall surface 32 is provided by tubular por-tion 16 to complete the valve cavity 26. Seated in valve cavity 26, and as will be more particularly des-cribed in FIGURE 4, is a valve member 25 which is of a disc-type configuration having a projection 35 extend-ing in the direction of outlet orifice 28. An end wall 31 is disposed at the end of tubular portion 20 with passageways 38 extending therefrom.
It will be noted in conjunction with FIGURES
2 and 3 that a standard entry site or reseal device 40 is provided on the upper arm portion 42 which is adja-cent tubular portion 20 and with tubular portion 43 forms a standard Y-type junction 44. Tubular portion 16 with large diameter section 17, is, in effect, an adap-tor for fitting over the standard Y-type junction 44. It is aided in its retention therein in a telescoping manner by means of annular flange 37. It will be seen regarding tubular portions 20 and 43 that there are numerous tapered cavities in the body sections such as shown at 46 and 47.
These are not essential and can be eliminated. However, in the instance of cavity 47 in arm portion 43, it can be used to accommodate a length of tubing such as 18.
As indicated earlier, and as best seen in FIG-URE 4, valve member 25 is of a disc-type con~iguration. In order to have the valve member extremely sensitive to flow conditions, it is constructed so as to be buoyant and lightweight. In this instance, valve member 25 is composed of a porous material 49 with the pores completely sealed by a closed surface 50 which surrounds the entire valve body.
Projection 35 extends from valve member 25 and is utilized for the purpose of maintaining the valve body in a level condition when in operation. The projection also serves the function of aiding assembly by preventing sticking to each other to promote automated handling. While it is preferred to have such a projection, it is not essential and could be eliminated.
Operation A better understanding of the advantages of the valve device of this invention will be had by a descrip-tion of its operation. As shown in FIGURE 1, valve device 10 will be interconnected to a solution container 11 by means of a drip chamber 12 and tubing 14. Parenteral solu-tion will be allowed to flow from the container into hypo-dermic needle 21 when clamp 15 is open. The position of valve member 25 will be as shown in FIGURE 2 with the valve 25 resting against projections 36 of tubular member 20.
In this position, fluid will flow around the lateral sur-face 39 of valve member 25 as it is spaced from side wall 32 of tubular portion 16. Fluid will continue to flow be-tween valve body 25 and passageways 38, through outlet orifice 28 into tubular portion 20 and ultimately to hypo-dermic needle 21. Should it be desired to administer a second solution, and not simultaneously with the solution in container 11, this is afforded by means of reseal de-vice 40 where a second solution can be injected there-through. When this takes place, fluid will flow in through tubular portion 42 and attempt to back up into tubular portion 20. This will effect an upward movement of the buoyant valve member 25 which will cause the flat surface 33 to seat against sealing ring 30, and thereby seal off intake orifice 27. The valve member will remain in this position as long as fluid is introduced into tubu-lar portion 42 at a force greater than that of the fluid passing in through tubular portion 16. When fluid is dis-continued being introduced into ~ubular portion 42 and upwardly into portion 20, valve member 25 will move to the open position due to the greater flow of fluid in tubular portion 16, onto projections 36 of tubular portion 20 to thereby attain the position as shown in FIGURE 2. This is the open position with fluid flowing into intake orifice 27 and out through outlet orifice 28 and around valve mem-ber 25.
It will be seen in the foregoing description that valve 25 is free to move in valve cavity 26. How~
ever, no exact positioning of the valve member is neces-sary as any portion of the flat surface 33 coming in con-tact with sealing ring 30 will seal off intake orifice 27.
Projection 35 serves the function of having the valve body maintain a level condition when it floats upwardly to close off intake orifice 27.
An important feature of this invention is the fact that the valve body 25 is formed of a porous mater-ial so as to be buoyant. In this instance it is composed of a plastic material of the crosslinked polyethylene type with pores as shown at 51. A sealing surface 50 composed of a flexible skin completely encloses the pores 49. This effect of the porous material and the flexible sealing skin offers the added advantage of a valve member which is not only buoyant but can readily adapt to a rigid or semirigid orifice surface in order to close it.
Accordingly, while a sealing ring 30 is composed of a 18~3 pliable material as shown in conjunction with an intake orifice 27, this component could be eliminated and sat-isfactory results still obtained by utilizing the porous bodied valve member with the flexible surface thereover.
The preferred material for composing valve mem-ber 25 is a foamed plastic material sold under the trade-Volara by Voltek, Inc. of Lawrence, Massachusetts.
Preferably, the material is a modified cross-linked poly-ethylene foam material and is sold as type E. The density of the particular polyethylene foam materials ranges from 2 - 6 lbs. per cubic foot under normal conditions.
It will thus be seen that through the present invention there is now provided a one-way valve which is highly sensitive to fluid flow yet is easily fabricated.
The valve cavity for the one-way valve can be simply formed from two telescoping tubular members and the disc type valve member 25 placed therein such that any type of orientation with the orifice surfaces is obviated. Ac-cordingly, any jamming or misalignment during fabrication or operation is substantially eliminated. Further, a minimum amount of material is utilized in forming the valve member so that it is very sensitive to minimum fluid flow, and fabricated without a high cost factor.
The foregoing invention can now be practiced by those skilled in the art. Such skilled persons will know that the invention is not necessarily restricted to the particular embodiments presented herein. The scope of the invention is to be defined by the terms of the follow-ing claims as given meaning by the preceding description.
It is an advantage of the present invention to provide a novel one-way valve which is extremely sensitive to fluid flow so that it can close off an orifice without appreciable back pressures. Other advantages are a valv-ing structure which can be composed of readily made material; can be mass produced and assembled in a fast and efficient manner; can be easily sterilized and can be made from an inexpensive material so that it is dispos-able.
Summary of the Invention The foregoing advantages are accomplished and the shortcomings of the prior art are overcome by the valving device of this invention which is comprised of a valve body defining opposing end walls and a lateral side wall surface with an intake orifice and an outlet orifice in the end walls. ~ freely movable valve member pre-sents a substantially flat, flexible and smooth surface for contact with the intake orifice when the valve body is filled with fluid. The valve ~ lS porous and has a specific gravity less than that of the fluid which prefer-ably is a parenteral solution or blood. In a preferred man-ner, the intake orifice also includes an annular member extending from the orifice for contact with the movable valve member with the annular member being composed of a pliable material. Also preferably, the porous material forming the valve ~ ~ lS an elastomeric plastic composed of a cross-linked polyethylene foam having a density in the range of 2 - 6 pounds per cubic foot. The valve body is preferably formed from two telescoping tubular members with the outlet surface defined by one of the tubular mem-bers which is of a smaller diameter. Preferably, the tubular member defining the outlet orifice forms a Y-type tubular junction to which is attached a needle assembly at one end and a solution containerj drip chamber and entry site for a fluid. at the opposite end.
Brief Description of the Drawings A better understanding of the one-way disc valve of this invention will be accomplished by reference to the drawing wherein:
FIGURE 1 is a perspective view of a parenteral solution administration device with the one-way disc valve forming a part thereof;
FIGURE 2 is a view in partial vertical section of the valving device showing the disc valve in the open position;
FIGURE 3 is a view similar to FIGURE 2 except showing the valving device in a closed position;
FIGURE 4 is an enlarged view in vertical section showing the valve member of this invention.
Description of the Preferred Embodiment Proceeding to a detailed description of a pre-ferred embodiment of the present invention, the one-way valve device 10 is shown in FIGURE 1 in conjunction with a flexible parenteral solution container 11 such as des-cribed in U. S. Patent 3,915,212. An air vented drip chamber 12 is interconnected thereto and a length of tub-ing 14 interconnects the drip chamber 12 with the tubular intake portion 16 of valve device 10. Similarly, a length of tubing 18 is interconnected to the outlet tubular por-tion 20 and ultimately to a hypodermic needle 21 by means of a Y-type injection site 22 with a length of tubing 23 connecting the needle and the injection site. A flow control clamp 15 is secured to tubing 18.
` 15 As best shown in FIGURES 2 and 3, tubular por-tions 16 and 20 are telescoped and spaced apart to form a valve body 24 with valve member 25 placed in the valve cavity 26. Vnder normal circumstances, tubular portion 16 will be the intake portlon of the valve device 10 and will define an intake orifice 27, with tubular portion 20 providing an outlet orifice 28. An annular sealing ring 30 extends from intake orifice 27 in end wall 29.
A laterial wall surface 32 is provided by tubular por-tion 16 to complete the valve cavity 26. Seated in valve cavity 26, and as will be more particularly des-cribed in FIGURE 4, is a valve member 25 which is of a disc-type configuration having a projection 35 extend-ing in the direction of outlet orifice 28. An end wall 31 is disposed at the end of tubular portion 20 with passageways 38 extending therefrom.
It will be noted in conjunction with FIGURES
2 and 3 that a standard entry site or reseal device 40 is provided on the upper arm portion 42 which is adja-cent tubular portion 20 and with tubular portion 43 forms a standard Y-type junction 44. Tubular portion 16 with large diameter section 17, is, in effect, an adap-tor for fitting over the standard Y-type junction 44. It is aided in its retention therein in a telescoping manner by means of annular flange 37. It will be seen regarding tubular portions 20 and 43 that there are numerous tapered cavities in the body sections such as shown at 46 and 47.
These are not essential and can be eliminated. However, in the instance of cavity 47 in arm portion 43, it can be used to accommodate a length of tubing such as 18.
As indicated earlier, and as best seen in FIG-URE 4, valve member 25 is of a disc-type con~iguration. In order to have the valve member extremely sensitive to flow conditions, it is constructed so as to be buoyant and lightweight. In this instance, valve member 25 is composed of a porous material 49 with the pores completely sealed by a closed surface 50 which surrounds the entire valve body.
Projection 35 extends from valve member 25 and is utilized for the purpose of maintaining the valve body in a level condition when in operation. The projection also serves the function of aiding assembly by preventing sticking to each other to promote automated handling. While it is preferred to have such a projection, it is not essential and could be eliminated.
Operation A better understanding of the advantages of the valve device of this invention will be had by a descrip-tion of its operation. As shown in FIGURE 1, valve device 10 will be interconnected to a solution container 11 by means of a drip chamber 12 and tubing 14. Parenteral solu-tion will be allowed to flow from the container into hypo-dermic needle 21 when clamp 15 is open. The position of valve member 25 will be as shown in FIGURE 2 with the valve 25 resting against projections 36 of tubular member 20.
In this position, fluid will flow around the lateral sur-face 39 of valve member 25 as it is spaced from side wall 32 of tubular portion 16. Fluid will continue to flow be-tween valve body 25 and passageways 38, through outlet orifice 28 into tubular portion 20 and ultimately to hypo-dermic needle 21. Should it be desired to administer a second solution, and not simultaneously with the solution in container 11, this is afforded by means of reseal de-vice 40 where a second solution can be injected there-through. When this takes place, fluid will flow in through tubular portion 42 and attempt to back up into tubular portion 20. This will effect an upward movement of the buoyant valve member 25 which will cause the flat surface 33 to seat against sealing ring 30, and thereby seal off intake orifice 27. The valve member will remain in this position as long as fluid is introduced into tubu-lar portion 42 at a force greater than that of the fluid passing in through tubular portion 16. When fluid is dis-continued being introduced into ~ubular portion 42 and upwardly into portion 20, valve member 25 will move to the open position due to the greater flow of fluid in tubular portion 16, onto projections 36 of tubular portion 20 to thereby attain the position as shown in FIGURE 2. This is the open position with fluid flowing into intake orifice 27 and out through outlet orifice 28 and around valve mem-ber 25.
It will be seen in the foregoing description that valve 25 is free to move in valve cavity 26. How~
ever, no exact positioning of the valve member is neces-sary as any portion of the flat surface 33 coming in con-tact with sealing ring 30 will seal off intake orifice 27.
Projection 35 serves the function of having the valve body maintain a level condition when it floats upwardly to close off intake orifice 27.
An important feature of this invention is the fact that the valve body 25 is formed of a porous mater-ial so as to be buoyant. In this instance it is composed of a plastic material of the crosslinked polyethylene type with pores as shown at 51. A sealing surface 50 composed of a flexible skin completely encloses the pores 49. This effect of the porous material and the flexible sealing skin offers the added advantage of a valve member which is not only buoyant but can readily adapt to a rigid or semirigid orifice surface in order to close it.
Accordingly, while a sealing ring 30 is composed of a 18~3 pliable material as shown in conjunction with an intake orifice 27, this component could be eliminated and sat-isfactory results still obtained by utilizing the porous bodied valve member with the flexible surface thereover.
The preferred material for composing valve mem-ber 25 is a foamed plastic material sold under the trade-Volara by Voltek, Inc. of Lawrence, Massachusetts.
Preferably, the material is a modified cross-linked poly-ethylene foam material and is sold as type E. The density of the particular polyethylene foam materials ranges from 2 - 6 lbs. per cubic foot under normal conditions.
It will thus be seen that through the present invention there is now provided a one-way valve which is highly sensitive to fluid flow yet is easily fabricated.
The valve cavity for the one-way valve can be simply formed from two telescoping tubular members and the disc type valve member 25 placed therein such that any type of orientation with the orifice surfaces is obviated. Ac-cordingly, any jamming or misalignment during fabrication or operation is substantially eliminated. Further, a minimum amount of material is utilized in forming the valve member so that it is very sensitive to minimum fluid flow, and fabricated without a high cost factor.
The foregoing invention can now be practiced by those skilled in the art. Such skilled persons will know that the invention is not necessarily restricted to the particular embodiments presented herein. The scope of the invention is to be defined by the terms of the follow-ing claims as given meaning by the preceding description.
Claims (9)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A one-way valve for use in an apparatus for administering a parenteral solution or blood to a patient comprising:
a valve body defining opposing end walls and a lateral wall surface with an intake orifice having a surface and an outlet orifice in said end walls;
a freely movable one piece, substantially disc-shaped valve member presenting a substantially flat, flexible, skin and smooth surface for contact with and conformity to the surface of said intake orifice;
said valve member being formed of a porous material with said pores-being closed by said flat, flexible surface; and said valve member having a specific gravity less than said parenteral solution or blood.
a valve body defining opposing end walls and a lateral wall surface with an intake orifice having a surface and an outlet orifice in said end walls;
a freely movable one piece, substantially disc-shaped valve member presenting a substantially flat, flexible, skin and smooth surface for contact with and conformity to the surface of said intake orifice;
said valve member being formed of a porous material with said pores-being closed by said flat, flexible surface; and said valve member having a specific gravity less than said parenteral solution or blood.
2. The one-way valve as defined in claim 1 wherein said valve member includes a projection extending in the direction of said outlet orifice.
3. The one-way valve as defined in claim 1 wherein said intake orifice includes an annular member extending from said orifice for contact with said movable valve member and said annular member is composed of a pliable material.
4. The one-way valve as defined in claim 1 wherein said porous material is an elastomeric plastic.
5. The one-way valve as defined in claim 4 wherein said elastomeric plastic material is a cross-linked poly-ethylene foam.
6. The one-way valve as defined in claim 5 wherein said porous material has a density in the range of about 2 to 6 pounds per cubic foot.
7. The one-way valve as defined in claim 1 wherein said valve body is defined by two telescoping tubular members with the outlet orifice defined by one of the tubular members which is of a smaller diameter.
8. The one-way valve as defined in Claim 7 wherein said tubular member defining said outlet orifice forms a Y-type tubular junction to which is attached a needle assembly at one end, and a solution container, drip chamber and entry site for a fluid at the opposite end.
9. The one-way valve as defined in claim 8 wherein said entry site defines a reseal device.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US3025779A | 1979-04-16 | 1979-04-16 | |
| US30,257 | 1979-04-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1148823A true CA1148823A (en) | 1983-06-28 |
Family
ID=21853313
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000348970A Expired CA1148823A (en) | 1979-04-16 | 1980-04-01 | One-way valve for parenteral apparatus |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JPS55145860A (en) |
| CA (1) | CA1148823A (en) |
| DE (1) | DE3014470A1 (en) |
| FR (1) | FR2454307A1 (en) |
| GB (1) | GB2045902B (en) |
| IT (1) | IT1140865B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3175724D1 (en) * | 1981-09-23 | 1987-01-29 | Intermedicat Gmbh | Check valve for use with intravenous administration sets |
| AU607208B2 (en) * | 1987-03-12 | 1991-02-28 | Vernay Laboratories, Inc. | Multiple fluid path junction device |
| US5725516A (en) * | 1993-07-01 | 1998-03-10 | Allegiance Healthcare Corp. | Suction canister system |
| GB9711166D0 (en) * | 1997-05-31 | 1997-07-23 | Smiths Industries Plc | Infusion device |
| US6988510B2 (en) | 2002-03-22 | 2006-01-24 | Halkey-Roberts Corporation | Disc check valve |
| US8403908B2 (en) * | 2007-12-17 | 2013-03-26 | Hospira, Inc. | Differential pressure based flow sensor assembly for medication delivery monitoring and method of using the same |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1178994A (en) * | 1967-05-11 | 1970-01-28 | Vauxhall Motors Ltd | Motor car body pressure relief valves |
| US4005710A (en) * | 1975-02-12 | 1977-02-01 | Abbott Laboratories | Parenteral apparatus with one-way valve |
-
1980
- 1980-03-13 GB GB8011844A patent/GB2045902B/en not_active Expired
- 1980-04-01 CA CA000348970A patent/CA1148823A/en not_active Expired
- 1980-04-15 JP JP4877380A patent/JPS55145860A/en active Pending
- 1980-04-15 FR FR8008417A patent/FR2454307A1/en not_active Withdrawn
- 1980-04-15 DE DE19803014470 patent/DE3014470A1/en not_active Withdrawn
- 1980-04-15 IT IT21388/80A patent/IT1140865B/en active
Also Published As
| Publication number | Publication date |
|---|---|
| IT1140865B (en) | 1986-10-10 |
| GB2045902A (en) | 1980-11-05 |
| DE3014470A1 (en) | 1980-10-30 |
| GB2045902B (en) | 1983-01-12 |
| FR2454307A1 (en) | 1980-11-14 |
| JPS55145860A (en) | 1980-11-13 |
| IT8021388A0 (en) | 1980-04-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |