US Patent No: 4,318,400

Number of patents in Portfolio can not be more than 2000

Medical infusor

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Importance

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Abstract

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A portable elastomeric bladder-powered infusor for dispensing drug in liquid form under pressure at a predetermined flow rate is disclosed. The main elements of the infusor are a tubular housing, a plug/flow control assembly fixed in one end of the bladder, an axially slidable piston/filling port assembly within the housing, and a tubular bladder. The plug and piston assemblies each has an axial post about which the bladder ends are attached. When the bladder is not charged with drug, the posts fill the bladder's lumen and their ends abut. Drug is charged to the infusor by inserting a drug-filled syringe into the open end of the housing with the syringe's needle entering an axial bore in the piston, penetrating a septum that blocks the bore, and extending into the axial post. The force exerted on the piston by the syringe is transmitted to the fixed plug assembly via the axial posts. Drug is plunged from the syringe causing the posts to separate and the bladder to expand axially and radially. Once the bladder is filled, the syringe is withdrawn, with the septum sealing itself. The drug is dispensed from the bladder via the plug/flow control assembly and a conduit that is connected to that assembly and extends to the infusion site.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
ALZA CORPORATIONPALO ALTO, CA429

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Carpenter, Peter F Atherton, CA 3 134
Griesinger, William K Ringoes, NJ 7 111
Peery, John R Stanford, CA 80 2126

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Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
ALZA CORPORATION (10)
* 4,419,096 Elastomeric bladder assembly 46 1982
* 5,156,850 Dosage form for time-varying patterns of drug delivery 32 1990
* 5,160,744 Verapmil therapy 22 1991
* 5,190,765 Therapy delayed 50 1991
* 5,785,994 Method for administering drug to gastrointestinal tract 12 1992
* 5,232,705 Dosage form for time-varying patterns of drug delivery 17 1992
* 5,252,338 Therapy delayed 35 1992
* 6,146,662 System for delaying drug delivery up to seven hours 18 1993
* 6,096,339 Dosage form, process of making and using same 42 1997
6,764,697 System for delaying drug delivery up to seven hours 18 1998
 
STRYKER CORPORATION (6)
6,679,862 Integrated medication delivery system 18 2002
7,048,715 Pump assembly for an integrated medication delivery system 3 2002
6,908,452 Port assembly for an integrated medication delivery system 4 2002
7,497,842 Medication delivery system comprising a combined medication reservoir, pump assembly and an actuator allowing continuous fluid communication through the pump assembly 0 2003
7,722,574 Infusion assembly that simultaneously delivers therapeutic fluid to plural body sites 1 2006
8,328,786 Method of controlling a medication delivery system with a removable label containing instructions for setting medication delivery rate overlying a second label with patient instructions 0 2008
 
BAXTER INTERNATIONAL INC. (5)
* 4,915,693 Pressurized fluid dispenser 32 1988
* 5,011,477 Continuous/bolus infusor 47 1989
* 5,120,315 Pressurized fluid dispenser 12 1991
* 5,135,497 Large volume pressurized fluid dispenser 9 1991
8,858,787 Dialysis system having non-invasive fluid velocity sensing 0 2007
 
BOSTON SCIENTIFIC SCIMED, INC. (5)
* 5,873,852 Device for injecting fluid into a wall of a blood vessel 67 1997
6,210,392 Method for treating a wall of a blood vessel 81 1999
* 6,102,904 Device for injecting fluid into a wall of a blood vessel 73 1999
6,695,830 Method for delivering medication into an arterial wall for prevention of restenosis 18 2001
8,066,690 Method for delivering medication into an arterial wall for prevention of restenosis 0 2010
 
I-FLOW CORPORATION (3)
* 5,105,983 Infusion apparatus 32 1989
* 5,080,652 Infusion apparatus 78 1990
D324911 Inflatable medical infusor 9 1991
 
Acemedical Co., Ltd. (2)
7,520,868 Delivery apparatus for medical fluids in flat and round shape 0 2004
7,264,610 Volume-regulating device for medical fluids 1 2004
 
Infusion Systems Corporation (2)
* 4,702,397 Pressurized fluid dispenser 26 1984
* 4,769,008 Pressurized fluid dispenser 33 1986
 
Therafuse, Inc. (2)
7,361,155 Compensating liquid delivery system and method 37 2003
7,268,859 Liquid measuring system 11 2004
 
TSUKADA MEDICAL RESEARCH CO., LTD. (2)
* 5,211,632 Infuser with balloon for infusing medicine 14 1991
8,109,907 Continuous drug solution infusion device 0 2006
 
Baxter Travenol Laboratories, Inc. (1)
* 4,597,758 Sealing closure for a Luer fitting in open communication with a pressurized liquid supply 28 1982
 
CAREFUSION 303, INC. (1)
* 4,968,301 Disposable infusion device 41 1989
 
CHISSO CORPORATION (1)
* 5,238,026 Liquid outflow control unit 14 1990
 
DAVSTAR, INC. (1)
* 5,346,476 Fluid delivery system 34 1992
 
DEKA PRODUCTS LIMITED PARTNERSHIP (1)
* 5,368,570 Apparatus for infusing medical solutions 20 1991
 
E.P. LIMITED (1)
* 6,534,089 Uniform drug delivery therapy 18 2000
 
EATON CORPORATION (1)
* 4,834,704 Injectable infusion pump apparatus for implanting long-term dispensing module and medication in an animal and method therefor 59 1988
 
GENESIS MEDICAL SYSTEMS, INC. (1)
* 4,953,753 Fluid dispensing apparatus with prestressed bladder 18 1988
 
INTERVENTIONAL TECHNOLOGIES INC. (1)
* 5,746,716 Catheter for injecting fluid medication into an arterial wall 41 1995
 
JANSSEN PHARMACEUTICA N.V. (1)
7,736,668 System for delaying drug delivery up to seven hours 0 2003
 
NISSHO CORPORATION (1)
* 5,380,287 Medical solution delivery system 32 1993
 
ORATEC INTERVENTIONS, INC. (1)
* RE35187 Fluid dispensing apparatus with prestressed bladder 77 1992
 
POLICHEM SA (1)
RE39239 Methods for treating early morning pathologies 2 2002
 
PRIME MEDICAL PRODUCTS, INC. (1)
* 5,306,257 Drug infuser 37 1992
 
ROCHE DIAGNOSTICS INTERNATIONAL AG (1)
* 8,827,976 System for ambulatory drug infusion comprising a filling apparatus for flexible containers, container assembly, and use of a flexible container 0 2011
 
Tearafuse, Inc. (1)
6,932,796 Liquid metering system 15 2002
 
Other [Check patent profile for assignment information] (3)
* 4,863,454 Dual bag intravenous preparation system 26 1987
* 6,511,457 Airless syringe 2 2001
* 8,328,049 Medical patient oral hydration system 0 2010
* Cited By Examiner