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Publication numberUS2999499 A
Publication typeGrant
Publication dateSep 12, 1961
Filing dateJul 11, 1958
Priority dateJul 11, 1958
Publication numberUS 2999499 A, US 2999499A, US-A-2999499, US2999499 A, US2999499A
InventorsRichard H Willet
Original AssigneeCutter Lab
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Flexible check valve
US 2999499 A
Abstract  available in
Images(1)
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Claims  available in
Description  (OCR text may contain errors)

Sept. 12, 1961 R. H. WILLET FLEXIBLE CHECK VALVE Filed July 11, 1958 United States Patent Filed July 11, 1958, Ser. No. 748,035

2 Claims. (Cl. 128-214) This invention relates to the administration of parenteral fluids.

In an application, Serial No. 629,530, filed December 20, 1956, now Patent No. 2,866,457, there is disclosed a simple apparatus assembly enabling any desired supplemental medication to be given a'patient through an existing administration apparatus set-up to administer a parenteral fluid to the patient. Bri'efly, that apparatus ineludes the usual parenteral fluid container connected by an administration set, e.g., a drip meter, tubing, and flow control means on the tubing, the latterterminating in a needle suitable for placementin a desired location on the patient. Additionally, the set-up includes a pair of check valves and a Y-fitting, one leg of which is connected by the tubing to the patient needle; one check valve is interposed in the line betweeen the drip meter and one leg of a Y-fitting; the other check valve is connected to the other leg of the Y-fitting, and is adapted to receive suitable means for injecting a supplemental medicament such as a sedative from a hypodermic needle.

While that apparatus was and is highly successful in use, certain shortcomings became apparent in use. For example, prior to the administration of certain solutions, it is desirable to ascertain if the needle is properly located in the. patent, e.g., most administrations of parenteral fluids must be made into a vein and it is therefore necessary to apply a negative pressure to the needle to ascertain if the needle is in a vain, this being made evident if blood is drawn by the negative pressure into the transparent tubing connected to the needle.

Also, the apparatus made it evident that the anesthetist might, to advantage, administer a supplemental medicament during the course of an operation, in which case it was desirable that the hypodermic syringe be out of the area of the operation and physically available at a location convenient to the anesthetist. In this case, the length of tubing between the check valve to be employed with the syringe and the Y-connection would be relatively long. To ensure proper administration, it is necessary that this tube be freed of air to avoid injection of air into the patient. Each of these operations is made possible with the apparatus of the present invention. Briefly, this includes a novel form of a check valve connected to one leg of the Y-connection, the valve being such that it can be used as either a check valve to prevent flow in one direction or as a relief or by-pass: valve, permitting flow in such one direction and which normally the valve would prevent. Both functions of the valve can be achieved by external manipulation of the valve and without exposing the interior of the valve or administration set to the atmosphere.

It is in general the broad object of the present invention to provide a novel, simple and improved apparatus for the administration of parenteral fluids, particularly one which enables air to be removed from the system selectively or a negative pressure applied to a needle associated with the apparatus.

It is in general the broad object of the present invention to provide a novel, simple and improved apparatus for the administration of parenteral fluids.

The invention includes other objects and features of advantage, some of which, together with the foregoing, will appear hereinafter wherein the present preferred form of administration apparatus is disclosed. In the drawing accompanying and forming a part hereof, FIGURE 1 is a side view, partly in section, showing the apparatus assembly embodying the present invention.

FIGURE 2 is a'section taken along the line 2-2 in FIGURE 1, showing the construction of one of the check valves, that shown at 9 in FIGURE 1.

FIGURE 3 is a cross-section taken longitudinally through the other check valve and which embodies certain novel features and which is designated 22 in FIGURE 1.

Referring to the drawing, I have indicated at 6 a container for a suitable parenteral fluid, the latter including a stopper, as is Well-known in the art. A flow meter or drip meter, generally indicated at 7, and such as that shown in Patent 2,730,098, is inserted into the stopper in the container 6 and provides means for observing the rate of the flow of fluid from the container 6. A length of tubing 8 connects the outlet end of the drip meter to a first check valve, generally indicated at 9. The other end of the check valve is connected by tubing 10 to a Y-conne'ction, generally indicated at 11. The Y-connection includes a first inlet legor passage 12, a second inlet leg or passage 13, and an outlet leg or passage 14, the latter being connected by a length of transparent tubing1'6 to an adapter 17, the latter being fitted within the hub 18 of the needle 19.

The second leg 13 of the Y-fitting is connected by tubing 21 to a second check valve, generally indicated at 22; the length of tubing 21 can be that necessary to the administration, e.g., it can be an inch or so or several feet in length. The second check valve has a Lucrtapered inlet 23 into which, for example, supplementary medication is introduced as by a syringe 26, the end 24 of the syringe being shown in tight frictional engagement with the inlet 23.

Any device well-known in the art can be utilized for the check valve 9 and one can use a ball-check or a flap check valve, as desired. That specifically shown at 9 is one which is well-known and which includes a disc 31 supported on several lugs 35 in spaced relation to the sidewalls 32 of check valve body 33 to permit free fluid flow in one direction. The disc is also spaced closely adjacent to the end of check valve inlet 34. If fluid flow reversal occurs, the disc is moved slightly upwardly to cover the end of the inlet 34 and so prevent the back-flow of fluid.

In accordance with the present invention, check valve 22 includes a body, generally indicated at 41, and which is made of an elastomeric material such as gum rubber, polyvinyl chloride, or polyethylene. The body 41 includes a valve seat 42 against which a ball seats under the pressure of a spring 44, the spring resting on the end of tubing 13. The tubing 13 can be held in place by friction or by a suitable adhesive between the interior of the body 41 and the tubing. The upper end of the body 41 is provided with a suitable tapered section, generally indicated at 46, and which taper generally corresponds to that known as a Luer taper.

The advantages of providing a flexible valve body are many. For example, with a hypodermic syringe connected to the valve body, as shown in the drawing, one can apply negative pressure to that region in which needle 19 is located, it only being necessary in this instance to clamp olf tubing 8 with clamp 27, retract the syringe plunger and, at the same time, manually deform the flexible valve housing 22 to an extent whereat the ball valve 43 is free of the seat 42. The hypodermic syringe 26 can be at any location which is relatively remote from the Y-connection 11, tubing 21 being made of suflicient length to permit of this accommodation. Air is eliminated from this length of tubing merely by deforming the flexible valve body by external manipulation prior to connection of the hyodermic syringe, positive fluid pressure being provided from the container 6, fluid flowing a through the Y-connection 11 to the ball 43. This enables the anesthetist, for example, to operate the hypodermic syringe at will from a location remote from the region of the operation.

. In use, the flow of'fluid from container 6 is regulated by a screw clamp, generally indicated at 27. Until it is desired to administer a supplementary fluid, the inlet 23 on the second check valve 22, is closed as by asterile cover. If it is desired during thecourse of the administration of the parenteral fluid from container 6 to administer a supplementary fluid, for example, an anesthetic medication such as sodium pentathol, it is only necessary to uncover the inlet 23, ensure that air is absent from this partof the apparatus as by manually manipulating the flexible valve body 41, as has been described, then inserting the end 24, of syringe 26" and injecting the supplementary medication into the fluid system. The injected material cannot pass check valve 9' nor can the fluid in the system pass the check valve 22. Thus, the two portions of the system are isolated, one from the other, by the two check valves, yet, the entrapped air can be removed readily and the position of the needle ascertained, all without endangering the sterility of the fluid content of the system.

I claim:

1. In a parenteral fluid administration set, including a fluid container having an outlet, a drip meter connected to said outlet, a first check valve, a first fluid conduit connected at one end of said drip meter and at its other end to said first check valve, a Y-connection having a first and second inlet conduit and a common third outlet conduit, conduit means connecting the first check valve and the first inlet conduit, the improvement consisting in a second check valve connected to the second inlet-l conduit and having a flexible valve body and a movable valve member therein normally maintained in closed position and movable under positive fluid force application to permit fluid flow therethrough in a first direction into the second inlet conduit and thence to the third outlet conduit, said flexible valve body being manipulatable to unseat the valve member to permit fluid flow from the second inlet conduit in a direction opposite to said one direction.

2. In a parenteral fluid administration set, including a fluid container. having an outlet, a drip meter connected to said outlet, a first check valve, a first fluid conduit connected at one end of said drip meter and at its other end to said first check valve, a Y-connection having a first and second inlet conduit and a common third outlet conduit, conduit means connecting the first check valve and the first inlet conduit, the improvement consisting in a second check valve connected to the secondinlet con-,.

duit and having a flexible valve body'and a movable valve member therein normally maintained in closed position and movable under positive fluid force applic.a-; tion to permit fluid flow therethrough in one direction into the second inlet conduit and thence to the third' outlet conduit, the second check, valve being adapted for connection to a hypodermic syringe whereby a liquid can be forced preferentially in said one direction, to the third outlet conduit, the second check valve body being manually movable to unseat the valve member andpermit flow in a direction opposite to said one direction. I

References Cited in the file of this patent UNITED STATES PATENTS FOREIGN PATENTS Germany June 26,

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1220872 *Mar 22, 1916Mar 27, 1917James E HockenAuxiliary air-valve.
US1880948 *Jan 10, 1931Oct 4, 1932Evennett Frederick Charl FelixValve
US2121354 *Dec 31, 1936Jun 21, 1938Goodwin Johnson EricValve
US2262169 *Aug 7, 1936Nov 11, 1941Dill Mfg CoValve stem
US2343828 *Jan 26, 1940Mar 7, 1944Wingfoot CorpSafety tube
US2797703 *Jan 28, 1955Jul 2, 1957Illinois Tool WorksPlastic grease fitting
US2866457 *Dec 20, 1956Dec 30, 1958Cutter LabApparatus for administration of parenteral fluids
DE602142C *Sep 1, 1934Junkers & CoAn einen Schlauch anschliessbarer Handbrausekopf
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3288142 *Apr 27, 1964Nov 29, 1966Salomon HakimHydrocephalus shunt with spring biased one-way valves
US3387625 *Jun 24, 1965Jun 11, 1968W L Molding CompanyCheck valve
US3438668 *Aug 26, 1965Apr 15, 1969Gen ElectricContactless lifter
US3517909 *Apr 26, 1968Jun 30, 1970Deseret PharmaValve unit for an intravenous liquid feeding apparatus
US3570484 *Aug 20, 1968Mar 16, 1971Eschmann Bros & Walsh LtdIntravenous valve assembly
US3771556 *Dec 27, 1971Nov 13, 1973Vernay LaboratoriesOne way check valve
US3826256 *Jan 13, 1972Jul 30, 1974Medidyne CorpCatheter delivery device
US3886937 *May 7, 1973Jun 3, 1975American Hospital Supply CorpMedical administration set for dispensing plural medical liquids
US3908652 *Sep 10, 1973Sep 30, 1975Hermann WeissingerMedical infusion apparatus
US3982534 *Jan 10, 1975Sep 28, 1976Buckman Thomas PIntravenous administration system
US4000740 *Aug 15, 1975Jan 4, 1977Baxter Travenol Laboratories, Inc.Injection site
US4048995 *Jul 19, 1976Sep 20, 1977Baxter Travenol Laboratories, Inc.Injection site
US4114617 *Feb 28, 1977Sep 19, 1978Turner Thomas DApparatus for infusion of a measured volume of blood
US4133314 *Dec 6, 1976Jan 9, 1979American Hospital Supply CorporationExtension transfer set
US4199000 *Jul 19, 1978Apr 22, 1980Edstrom William ECross-contamination isolator
US4219021 *Feb 27, 1978Aug 26, 1980Fink Joseph LMulti-position stop-cock valve for intravenous administration of multiple medications
US4224934 *Apr 11, 1979Sep 30, 1980American Medical Systems, Inc.Medical prosthetic pull valve and system for using same
US4250879 *Feb 28, 1979Feb 17, 1981Abbott LaboratoriesEquipment sets and system for the sequential administration of medical liquids at dual flow rates employing a combined air barrier and liquid sequencing valve
US4256104 *Feb 28, 1979Mar 17, 1981Abbott LaboratoriesEquipment sets and system for the sequential administration of medical liquids at dual flow rates
US4324238 *Jun 9, 1980Apr 13, 1982Abbott LaboratoriesEquipment sets having a combined air barrier and liquid sequencing device for the sequential administration of medical liquids at dual flow rates
US4354492 *Dec 12, 1980Oct 19, 1982American Hospital Supply CorporationMedical administration set with backflow check valve
US4563173 *Apr 19, 1983Jan 7, 1986National Biomedical Research FoundationPump-actuated sequencing valve and system
US4581014 *Apr 3, 1984Apr 8, 1986Ivac CorporationFluid infusion system
US4605395 *Jan 13, 1984Aug 12, 1986Universite Rene Descartes (Paris V)Hydrocephaly treatment device including a variable impedance filter
US4608042 *Sep 25, 1985Aug 26, 1986Warner-Lambert CompanyApparatus for sequential infusion of medical solutions
US4615693 *Mar 27, 1984Oct 7, 1986Nypro Inc.Flow-guarded drip chamber
US4658655 *Feb 14, 1986Apr 21, 1987Terumo Kabushiki KaishaFluid sampling device for medical use
US4705506 *Nov 14, 1985Nov 10, 1987Minnesota Mining And Manufacturing CompanyMultiple solution IV system with setup error protection
US4714463 *Nov 15, 1985Dec 22, 1987Minnesota Mining And Manufacturing CompanySequence valve for piggyback IV administration with tube reversal prevention
US4865592 *Apr 27, 1988Sep 12, 1989Becton, Dickinson And CompanyContainer and needle assembly
US4915687 *Feb 17, 1989Apr 10, 1990Sivert George ANeedleless injection port arrangement
US4915688 *Dec 3, 1987Apr 10, 1990Baxter International Inc.Apparatus for administering solution to a patient
US4941875 *Jul 18, 1979Jul 17, 1990Brennan John FI.V. system for successive administration of two or more solutions at different rates
US4952210 *Dec 13, 1985Aug 28, 1990Becton, Dickinson And CompanyParenteral fluid administration set
US4998926 *Feb 28, 1990Mar 12, 1991Becton, Dickinson And CompanyNon-vented
US5049128 *Feb 6, 1990Sep 17, 1991Duquette Irene AValved infusion port
US5060833 *Aug 24, 1990Oct 29, 1991Fastrak Systems, Inc.Camel back
US5147324 *Apr 27, 1990Sep 15, 1992C. R. Bard, Inc.Prefilled syringe delivery system
US5156598 *Aug 19, 1991Oct 20, 1992C. R. Bard, Inc.Prefilled syringe delivery system
US5167201 *May 1, 1991Dec 1, 1992S.A.E. AfikimSystem for disinfecting milking apparatus
US5195987 *Aug 16, 1991Mar 23, 1993Karpiak Kenneth DEmergency I.V. set-up apparatus
US5199947 *Sep 10, 1991Apr 6, 1993Icu Medical, Inc.Method of locking an influent line to a piggyback connector
US5230706 *Mar 12, 1992Jul 27, 1993Duquette Irene ABi-directional valve assembly used in needleless injection or infusion ports
US5242432 *Sep 26, 1991Sep 7, 1993IvacMedical valve assembly
US5281206 *Aug 19, 1991Jan 25, 1994Icu Medical, Inc.Needle connector with rotatable collar
US5344414 *Feb 19, 1993Sep 6, 1994Icu Medical Inc.Medical connector
US5360413 *May 19, 1993Nov 1, 1994Filtertek, Inc.Needleless access device
US5423751 *Feb 18, 1993Jun 13, 1995Harrison; Samuel W.Contrast media dispensing apparatus
US5549577 *Dec 29, 1993Aug 27, 1996Ivac CorporationNeedleless connector
US5645404 *Dec 29, 1994Jul 8, 1997Z Industry, Inc.Personal fluid dispensing device
US5674195 *Feb 6, 1995Oct 7, 1997Truthan; Charles EdwinSyringe apparatus and method of mixing liquid medicants within a syringe
US5688254 *Jun 7, 1995Nov 18, 1997Icu Medical, Inc.Medical connector
US5776116 *Jun 7, 1995Jul 7, 1998Icu Medical, Inc.For transferring a fluid from first to a second conduit
US5810792 *Apr 3, 1996Sep 22, 1998Icu Medical, Inc.Locking blunt cannula
US5826621 *Aug 5, 1996Oct 27, 1998Alaris Medical Systems, Inc.Valve apparatus
US5954708 *Apr 8, 1998Sep 21, 1999Icu Medical, Inc.For transferring a fluid from one location to another
US5957898 *May 20, 1998Sep 28, 1999Baxter International Inc.Needleless connector
US6032831 *Sep 11, 1998Mar 7, 2000Came1Bak Products, Inc.Personal hydration system with an improved mouthpiece
US6039302 *Sep 13, 1999Mar 21, 2000Nypro Inc.Swabbable luer-activated valve
US6070767 *Jul 17, 1998Jun 6, 2000Camelbak Products, Inc.Personal hydration system with an improved mouthpiece
US6261282May 20, 1998Jul 17, 2001Baxter International Inc.Needleless connector
US6364168Mar 6, 2000Apr 2, 2002Camelbak Products, Inc.Personal hydration system with an improved mouthpiece
US6382230Jun 26, 2000May 7, 2002Acadia Elastomers Corp.Ball valve
US6520937Dec 18, 2000Feb 18, 2003Scimed Life Systems, Inc.Fluid injection device
US6623447 *Apr 12, 2002Sep 23, 2003Zevex, Inc.Apparatus and method for preventing free flow in an infusion line
US6659976 *Apr 16, 2001Dec 9, 2003Zevek, Inc.Feeding set adaptor
US6669681Jul 11, 2001Dec 30, 2003Baxter International Inc.Needleless connector
US6695817Jul 11, 2000Feb 24, 2004Icu Medical, Inc.Medical valve with positive flow characteristics
US6755391Oct 22, 2001Jun 29, 2004Nypro Inc.Anti-drawback medical valve
US6869426Nov 7, 2002Mar 22, 2005Nypro Inc.Anti-drawback medical valve
US6883778Jan 6, 2000Apr 26, 2005Nypro Inc.Apparatus for reducing fluid drawback through a medical valve
US6916309Aug 7, 2003Jul 12, 2005Icu Medical, Inc.Medical valve with positive flow characteristics
US6923785Apr 4, 2003Aug 2, 2005Zevex, Inc.Apparatus and method for preventing free flow in an infusion line
US6932795Jun 5, 2002Aug 23, 2005Icu Medical, Inc.Positive flow valve
US6979311Apr 16, 2001Dec 27, 2005Zevex, Inc.Apparatus and method for preventing free flow in an infusion line
US7014169May 13, 2004Mar 21, 2006Nypro Inc.Anti-drawback medical valve
US7070575Aug 23, 2004Jul 4, 2006Zevex, Inc.Adaptor for feeding sets
US7100890Mar 16, 2001Sep 5, 2006Nypro Inc.Swabbable luer-activated valve
US7150727Dec 11, 2002Dec 19, 2006Zevex, Inc.Apparatus and method for preventing free flow in an infusion line
US7166084Feb 5, 2002Jan 23, 2007Dsu Medical CorporationBlood set priming method and apparatus
US7357792Oct 16, 2003Apr 15, 2008Nypro Inc.Positive push medical valve with internal seal
US7367963May 23, 2005May 6, 2008Zevex, Inc.Apparatus and method for preventing free flow in an infusion line
US7396348Aug 20, 2002Jul 8, 2008Nypro Inc.Medical valve with expandable member
US7497849May 2, 2006Mar 3, 2009Icu Medical, Inc.High flow rate needleless medical connector
US7520489Jun 17, 2004Apr 21, 2009Filtertek Inc.Fluid handling device and method of making same
US7628774May 2, 2006Dec 8, 2009Icu Medical, Inc.Needleless Medical Connector
US7635357Jan 3, 2003Dec 22, 2009Mayer Bruno Franz PNeedleless injection site
US7670322Feb 1, 2005Mar 2, 2010Icu Medical, Inc.Check valve for medical Y-site
US7708714Jan 28, 2005May 4, 2010Baxter International Inc.Dialysis connector with retention and feedback features
US7713247May 3, 2006May 11, 2010Icu Medical, Inc.Medical valve and method of use
US7713248May 3, 2006May 11, 2010Icu Medical, Inc.Medical valve and method of use
US7713249May 3, 2006May 11, 2010Icu Medical, Inc.Medical valve and method of use
US7713250Apr 21, 2004May 11, 2010Becton, Dickinson And CompanyNeedleless luer access connector
US7717883May 3, 2006May 18, 2010Icu Medical, Inc.Medical valve and method of use
US7717884May 3, 2006May 18, 2010Icu Medical, Inc.Medical valve and method of use
US7717885May 3, 2006May 18, 2010Icu Medical, Inc.Medical valve and method of use
US7717886May 3, 2006May 18, 2010Icu Medical, Inc.Medical valve and method of use
US7717887May 3, 2006May 18, 2010Icu Medical, Inc.Medical valve and method of use
US7722575May 3, 2006May 25, 2010Icu Medical, Inc.Medical valve and method of use
US7722576May 3, 2006May 25, 2010Icu Medical, Inc.Medical valve and method of use
US7753892Feb 15, 2005Jul 13, 2010Nypro Inc.Anti-drawback medical valve
US7763199May 3, 2006Jul 27, 2010Icu Medical, Inc.Method of making a seal having slit formed therein
US7780144 *Sep 14, 2004Aug 24, 2010Robert Bosch GmbhValve, in particular for a high-pressure pump of a fuel injection system for an internal combustion engine
US7789864Nov 3, 2003Sep 7, 2010Nypro Inc.Luer-activated valve
US7794436Jun 12, 2004Sep 14, 2010Lloyd Jay PinelControlled gastric bolus feeding device
US7815612Sep 14, 2005Oct 19, 2010Zevex, Inc.Apparatus and method for preventing free flow in an infusion line
US7824393May 3, 2006Nov 2, 2010Icu Medical, Inc.Medical connector having high flow rate characteristics
US7837658May 16, 2006Nov 23, 2010Nypro Inc.Anti-drawback medical valve
US7887519Jan 10, 2006Feb 15, 2011Nypro Inc.Valve with internal lifter
US7914502Jul 21, 2004Mar 29, 2011Nypro Inc.Anti-drawback medical valve
US7931627May 2, 2006Apr 26, 2011Icu Medical, Inc.Check valve for medical Y-site
US7947032Mar 19, 2010May 24, 2011Becton, Dickinson And CompanyNeedleless luer access connector
US7976513Apr 5, 2004Jul 12, 2011Zevex, Inc.Apparatus and method for selectively controlling flow in an infusion line
US7994919Jun 10, 2009Aug 9, 2011Rockwell Automation Technologies, Inc.Systems and methods that integrate radio frequency identification (RFID) technology with agent-based control systems
US7997475Feb 29, 2008Aug 16, 2011Rockwell Automation Technologies, Inc.Systems and methods that integrate radio frequency identification (RFID) technology with industrial controllers
US7998121Feb 5, 2010Aug 16, 2011Zevex, Inc.Automatic safety occluder
US8002765May 3, 2006Aug 23, 2011Icu Medical, Inc.Medical valve with fluid escape space
US8025227Sep 30, 2005Sep 27, 2011Rockwell Automation Technologies, Inc.Access to distributed databases via pointer stored in RFID tag
US8038123Mar 10, 2009Oct 18, 2011Filtertek Inc.Fluid handling device and method of making same
US8105314Oct 25, 2007Jan 31, 2012Icu Medical, Inc.Medical connector
US8152053Mar 12, 2009Apr 10, 2012Rockwell Automation Technologies, Inc.RFID architecture in an industrial controller environment
US8221391Jul 27, 2010Jul 17, 2012Icu Medical, Inc.Needleless medical connector
US8260948Aug 10, 2005Sep 4, 2012Rockwell Automation Technologies, Inc.Enhanced controller utilizing RFID technology
US8343111Sep 28, 2010Jan 1, 2013Zevex, Inc.Anti-free flow mechanism for enteral feeding pumps
US8384544Jun 10, 2009Feb 26, 2013Rockwell Automation Technologies, Inc.Systems and methods that integrate radio frequency identification (RFID) technology with agent-based control systems
US8398607Jan 30, 2012Mar 19, 2013Icu Medical, Inc.Medical connector
US8425470Oct 1, 2010Apr 23, 2013Zevex, Inc.Anti-free-flow mechanism for enteral feeding pumps
US8444628Jul 16, 2012May 21, 2013Icu Medical, Inc.Needleless medical connector
US8454579Mar 23, 2010Jun 4, 2013Icu Medical, Inc.Medical connector with automatic valves and volume regulator
US8491543Jul 22, 2011Jul 23, 2013Zevex, Inc.Automatic safety occluder
US8568371Jun 21, 2010Oct 29, 2013Np Medical Inc.Medical valve with improved back-pressure sealing
US8628515Mar 11, 2013Jan 14, 2014Icu Medical, Inc.Medical connector
US8758306May 12, 2011Jun 24, 2014Icu Medical, Inc.Medical connectors and methods of use
DE3019426A1 *May 21, 1980Nov 26, 1981Joseph L FinkMehrstellungsventil bsp. fuer intravenoese verabreichung von medikamenten
DE4319115A1 *Jun 9, 1993Dec 15, 1994Axon Neue Medizintechnik GmbhMechanical, automatic outflow preventing device for infusion drip chamber
DE4411418A1 *Apr 2, 1994Oct 6, 1994Thomas BraegerInfusion apparatus
EP0089404A1 *Jan 23, 1980Sep 28, 1983Abbott LaboratoriesGravitational flow system for the sequential administration of a plurality of medical liquids
WO1980001754A1 *Jan 23, 1980Sep 4, 1980Abbott LabNovel valve employing hydrophobic and hydrophilic membranes
WO1980001756A1 *Jan 23, 1980Sep 4, 1980Abbott LabEquipment sets and systems for the sequential administration of medical liquids at dual flow rates
WO1984004044A1 *Apr 18, 1984Oct 25, 1984Nat Biomedical Res FoundPump-actuated sequencing valve and system
WO1998007462A1 *Aug 18, 1997Feb 26, 1998Claus H BackesMedical high-pressure injection system
WO2005070102A2 *Jan 10, 2005Aug 4, 2005Lloyd Jay PinelControlled gastric bolus feeding device
WO2008039739A2 *Sep 25, 2007Apr 3, 2008Seth GasserFoot pedal controlling flow of liquid fluid in arthroscopic surgery
WO2008063553A2 *Nov 16, 2007Aug 7, 2008Vitality Food Service IncMetering pump for dispensing liquid
WO2013147697A1 *Mar 28, 2013Oct 3, 2013Ge Healthcare Bio-Sciences AbDevice for delivery of sample fluid
Classifications
U.S. Classification604/83, 239/576, 604/80, 604/251, 251/342, 137/539
International ClassificationA61M39/24, A61M5/14
Cooperative ClassificationA61M5/1408, A61M2039/242, A61M39/24, A61M2039/2473, A61M2039/248
European ClassificationA61M5/14B1, A61M39/24