US3486539A - Liquid dispensing and metering assembly - Google Patents
Liquid dispensing and metering assembly Download PDFInfo
- Publication number
- US3486539A US3486539A US490787A US3486539DA US3486539A US 3486539 A US3486539 A US 3486539A US 490787 A US490787 A US 490787A US 3486539D A US3486539D A US 3486539DA US 3486539 A US3486539 A US 3486539A
- Authority
- US
- United States
- Prior art keywords
- receptacle
- assembly
- liquid
- tube
- metering
- 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 - Lifetime
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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
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/162—Needle sets, i.e. connections by puncture between reservoir and tube ; Connections between reservoir and tube
-
- 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
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/142—Pressure infusion, e.g. using pumps
- A61M5/145—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons
- A61M5/148—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons flexible, e.g. independent bags
- A61M5/152—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons flexible, e.g. independent bags pressurised by contraction of elastic reservoirs
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S128/00—Surgery
- Y10S128/12—Pressure infusion
Definitions
- FIGURE 1 is a longitudinal view in section through a liquid dispensing and metering assembly of the present invention, depicting the same prior to filling and use thereof;
- FIGURE 2 is a view similar to that of FIGURE 1 but illustrating the same in its filled condition and ready for use;
- FIGURE 3 is an enlarged fragmentary view of section, through the coupling portion of the assembly of FIG- URE 2;
- FIGURE 4 is a front end view in elevation of a receptacle assembly constituting a portion of the assembly of FIGURES 1 and 2;
- FIGURE 5 is an end view in elevation of a hub constituting a component of a coupling involved in the apparatus of FIGURE 1;
- FIGURE 6 is a longitudinal view in section of an assembly utilizing the principle of the apparatus of FIG- URE 1 in the removal of fluids from a body cavity of a patient;
- FIGURE 7 is a view similar to that of FIGURE 6, but depicting the assembly in a partially discharged condition.
- FIGURE 8 is a curve depicting dispensing characteristics of the apparatus of the present invention, when designed for use in the medical field where a discharge flow at low rate and substantially constant pressure over a prolonged period of time is a prerequisite.
- a liquid dispensing and metering assembly made up of a unique receptacle assembly 1 and a novel metering assembly 3, connectable together in functional relationship by a disconnectable coupling 5.
- the receptacle assembly comprises a receptacle 7 formed from a tube of expansible material such as a polymer, one end of the tube being closed off, preferably by a clamping ring 9, leaving the other end open for stretching over the neck 11 of a connector 13 which also forms one component of the coupling 5.
- An O-ring 15 about the attached end of the tube serves to anchor the same more securely, the neck portion of the connector having an O-ring recess 17 to assure retention of the tube about the neck portion of the connector.
- the connector 13 comprises a head 19 from which the neck 11 extends, and has a passageway 21 therethrough.
- the neck end of the coupling is formed with a counter bore to receive a syringe type plug or stopper 23 which is held in its installed position against a shoulder formed by the counter bore, by a retainer sleeve 25 snugly fitting into the neck, and preferably adhesively secured or bonded therein.
- a wide diametrical slot 27 across the face of the conector creates a pair of oposing side walls 29, 31, which are undercut to form interlock grooves 33, 35 respectively, while the floor of the slot is recessed about the passageway 21 to form a teat 32.
- the plug or stoper 23 while it normally closes the entrance to the tube, is capable of being penetrated by the needle of a syringe, of the type conventionally employed in the medical field, and such type of syringe can be utilized in filling the tube with liquid under pressure, the tube expanding under such pressure as the liquid is forced into it. Upon withdrawal of the needle, the liquid will be trapped under pressure in the tube.
- a sheath or packet 39 Surrounding the tube is a sheath or packet 39, which in the preferred form of the invention under consideration, may be of nylon film or other cheap flexible material, and such sheath will function to protect the tube and limit the radial expansion thereof as is filled.
- the jacket at one end, is preferably anchored about the head of the connector, to which it is retained by an O-ring 43, the opposite end of the jacket being left open.
- the receptacle assembly In its unfilled condition, the receptacle assembly, as thus described, is limp and flexible, but when filled to capacity, the tube will inflate to the limit permitted by the jacket and become semi-rigid.
- a string 45 preferably of nylon, because of its inherent strength, is affixed to the closed off end of the tube, which can readily be accomplished during the application of the clamping ring, by looping the string through the clamping ring While applying the ring.
- the receptacle is held upright with the connector end uppermost, and while so held, approximately twelve to fifteen cubic centimeters of the solution to be utilized, is forced into the tube from a syringe, the needle of which has been inserted through the plug or stopper. While retaining the syringe in its inserted position, the tube is manipulated to work all air to the space above the liquid level, whereupon, the syringe plunger is withdrawn to suck out the air. The syringe can then be removed leaving the unfilled portion of the tube evacuated and free of air.
- the receptacle is then suspended from a hook by means of the loop of nylon string, following which a syringe containing the desired liquid, is again applied and the solution is slowly injected while the operator manually pinches the tube at a point close to the syringe needle, to assure starting a bubble forming at the entrance end of the tube.
- the receptacle as thus filled is ready for use in discharging is contents and for this purpose I provide a hub 51 which constitutes the other half of the coupling.
- This hub at its coupling end is formed with diametrically located cam fins 53, 55 adapted to fit into the interlock grooves 33, 35 of the connector component of the receptacle assembly, and by a partial turn of the hub, interlock and couple the hub to the receptacle asembly in a manner which, under normal conditions, will assure retention of the hub against accidental uncoupling.
- the hub is preferably molded with an extension 57 terminating in a head 59 contoured to permit of forcible entry into an end of a discharge tube 60 of rubber or like material, to retain the same fixedly Secured to the hub against accidental dislodgment therefrom.
- a longitudinal passageway 61 through the hub is adapted to frictionally receive a cannula 63, such passageway, at the tube attachment end, being of a smaller diameter to match that of the inside diameter of the cannula, and at the same time form a shoulder 65 against which the cannula may abut, to permit pressure being applied to the cannula in puncturing the plug or stopper 23, and affect a flow connection with the interior of the rece tac e.
- the coupling end of the passageway through the hub is preferably counter-sunk to provide suflicient flexibility during camming of the fins into the interlock grooves to facilitate such coupling.
- metering assembly 3 consists of a porous plug 71 in the tube and of such uniform porosity as to function as a meter in determining flow rate of liquid, such meter being preferably in conjunction with a porous fiber 73 also disposed in the tube 60 in spaced relationship to the meter, on the upstream side thereof.
- the calibration of the porous meter is a function of its built-in porosity, as well as its diameter and length, and these may be varied to meet required conditions.
- the meter plug 71 and filter 73 may be of ceramic or sintered metal, or any other suitable material capable of providing porosity having the desired characteristics.
- the function of the filter is to assure that the liquid passing through the meter shall be entirely free of sediment or precipitates which might otherwise clog pores of the meter and alter the calibration value thereof.
- the present invention is particularly intended for use with liquids which are initially considered free of precipitate or sediment, and consequently the porous filter is really intended as a safeguard for the meter, against liquid which may accidentally have become slightly contaminated with solids, and to assure against clogging of the filter under such circumstances, the filter element is preferably of greater diameter than the meter element.
- the plug 23 and cannula arrangement for withdrawing liquid from the receptacle 7, may be replaced by a needle valve assembly.
- an expandable tube 75 is housed in an airtight shell or jacket 79, through one end of which it discharges into a discharge line 81 through a metering means in the form of a manually controllable flow adjustable valve assembly 83 including a valve 85.
- metering means may 'be utilized for this device in that flow of liquid is not required to be as precise and critical as when delivering liquid to a patient utilizing the assembly of FIGURES 1 and 2, and flow rates may be greater.
- an incoming line 84 To the other end of the shell is connected an incoming line 84 through a similar manually controllable flow adjustable valve assembly 86 including a valve 87.
- the incoming line is connected to a source of fluid (not shown), from which it is desired to withdraw the fluid, and as liquid is discharged from the expandable tube 75, the reduction in volume thereof creates in the shell, a vacuum condition, which causes liquid or fluid to be withdrawn from the source into the shell.
- the valve 87 in the incoming line may be adjusted to maximum permissible flow of the fluid to be withdrawn, while the actual rate of flow of such fluid will be determined by the adjustment of the valve in the discharge line.
- the shell or jacket 79 may be of any suitable material, but should be sufficiently rigid to withstand the differential pressures developed during development of reduced pressures within the same, and preferably should be of a light transparent plastic to permit observation of the fluids drawn into it.
- the coupling assembly and metering assembly of the apparatus of FIG- URE 1 may be relied on, otherwise the more conventional construction illustrated may be employed.
- FIGURE 8 of the drawings I have depicted in phantom, the discharge characteristic curve 91 of an ideal receptacle, in terms of withdrawal performance, wherein I have plotted volume discharge from the receptacle against discharge pressure. From this curve it will be appreciated, that what is desired, is a discharge pressure which remains substantially constant throughout the entire discharge cycle.
- the length and diameter of the tube used in the receptacle will determine the capacity of the receptacle assembly, while the thickness of the tube wall will establish the functioning pressure.
- the solid line curve 93 of FIG- URE 6 represents an actual curve obtained with a receptacle of pure gum rubber having a wall thickness of /32 of an inch, a length of 6 inches, an uninfiated diameter of of an inch and an inflated diameter of 1 inch.
- the receptacle dispenses under positively applied pressure, as distinguished from gravity feed employed in conventional intravenous feeding procedure and the like, it no longer becomes necessary to maintain an elevated position of the receptacle with respect to the patient being treated, which in turn, required substantial immobilization of the patient.
- the device of the present invention can be strapped or otherwise attached to the patient, thus allowing the patient complete mobility and freedom of movement, with full assurance, due to the positive pressure involved in its operation, that the device will function smoothly and continpously, and will not require the repeated attention and adjustment demanded by apparatus which dispenses by gravity.
- the receptacle and nylon jacket being flexible will accommodate themselves to the body contour at the location of application, and thus may be readily concealed beneath ones clothing.
- the connector in lieu of being made circular, can be oval in contour.
- a liquid dispensing and metering assembly comprising a receptacle assembly having expansible characteristics, for holding liquid under pressure, and including a receptacle of a polymer having the characteristics of maintaining a substantially constant internal pressure in said receptacle throughout a range of decreasing volume of its contents, a flow passageway from said receptacle assembly, and means in said flow passageway for metering liquid from said receptacle assembly, and under pressure from said receptacle assembly.
- a receptacle of elastic material such as surgical rubber
- a receptacle assembly for a liquid dispensing and metering assembly comprising a receptacle of expansible material enabling said receptacle to expand under pressure of liquid forced into said receptacle and maintain pressure on such liquid upon completion of a filling operation, a closure for said receptacle having a flow passageway therethrough, means aflixing said receptacle at one end to said closure with said passageway in flow communication with said receptacle, and means for controlling flow through said passageway from a fully closed condition of said passageway, to enable one to maintain liquid in said receptacle under pressure of said receptacle, a collapsible jacket about said receptacle and affixed at one end to said closure and open at its other end.
- a receptacle assembly in accordance with claim 5 characterised by said receptacle having means at its opposite end and accessible through the open end of said jacket for use in placing said receptacle under tension.
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- Health & Medical Sciences (AREA)
- Vascular Medicine (AREA)
- Engineering & Computer Science (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US49078765A | 1965-09-28 | 1965-09-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3486539A true US3486539A (en) | 1969-12-30 |
Family
ID=23949466
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US490787A Expired - Lifetime US3486539A (en) | 1965-09-28 | 1965-09-28 | Liquid dispensing and metering assembly |
Country Status (4)
Country | Link |
---|---|
US (1) | US3486539A (ro) |
JP (1) | JPS4942753B1 (ro) |
DE (1) | DE1548992C3 (ro) |
GB (1) | GB1066739A (ro) |
Cited By (107)
Publication number | Priority date | Publication date | Assignee | Title |
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US3589470A (en) * | 1969-09-24 | 1971-06-29 | Superior Mfg Co | Grease gun adapter |
US3640277A (en) * | 1968-12-09 | 1972-02-08 | Marvin Adelberg | Medical liquid administration device |
US3640276A (en) * | 1970-01-09 | 1972-02-08 | Allis Chalmers Mfg Co | Apparatus for making intravenous or intra-arterial injections |
US3736954A (en) * | 1971-05-20 | 1973-06-05 | Sparton Corp | Self-attaching check valve |
US3785367A (en) * | 1972-03-13 | 1974-01-15 | Pharmasel Division American Ho | Arterial blood sampler |
US3817248A (en) * | 1972-11-06 | 1974-06-18 | Alza Corp | Self powered device for delivering beneficial agent |
US3850348A (en) * | 1972-02-11 | 1974-11-26 | Anvar | Apparatus for injection of liquid |
US3895631A (en) * | 1974-02-04 | 1975-07-22 | Alza Corp | Liquid infusion unit |
DE2420978A1 (de) * | 1973-03-26 | 1975-11-20 | Alza Corp | Elastische blase zum speichern und abgeben unter druck einer fluessigkeit sowie vorrichtung mit einer solchen blase |
US3961725A (en) * | 1974-04-09 | 1976-06-08 | Clark Richard A | Method and apparatus for dispensing fluids under pressure |
US3965889A (en) * | 1971-11-26 | 1976-06-29 | Commissariat A L'energie Atomique | Apparatus for the sampling of blood and the separation of plasma under anaerobic conditions |
US3993069A (en) * | 1973-03-26 | 1976-11-23 | Alza Corporation | Liquid delivery device bladder |
US4201207A (en) * | 1973-03-26 | 1980-05-06 | Alza Corporation | Bladder for liquid dispenser |
US4204538A (en) * | 1978-06-07 | 1980-05-27 | Imed Corporation | Cassette for intravenous controller |
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Also Published As
Publication number | Publication date |
---|---|
DE1548992C3 (de) | 1974-06-27 |
GB1066739A (en) | 1967-04-26 |
DE1548992B2 (de) | 1973-11-15 |
DE1548992A1 (de) | 1972-01-05 |
JPS4942753B1 (ro) | 1974-11-16 |
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