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Class 604/145 - Pressurizing gas generated by chemical reaction


Subclass of Class 604 - Surgery
Definition: Subject matter wherein the gas pressure is caused by a chemical
No. of patents: 44
Last issue date: 11/06/2007


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NumberTitleIssue Date
7291410Orientation independent liquid fuel reservoir
A fuel reservoir for a liquid fuel cell particularly useful for portable electronic devices or for a reformer, includes (a) a container defining a volume for holding a liquid fuel; (b) a wicking structure positioned within the volume and into which at least one port...
11/06/2007
7147799Methods of using an oxygen scavenger
An oxygen scavenging packet containing an iron-based oxygen scavenger and an electrolyte is set forth in which the rate of uptake of oxygen is increased by virtue of the introduction into the packet of an oxygen uptake accelerator containing water. Methods of increa...
12/12/2006
7108686Implantable, refillable infusion device and septum replacement kit
An implantable infusion device (10) includes a lightweight, inert housing (12) which contains an infusate (18) for administration to a patient, and an enclosed, gas-impermeable variable volume chamber (30) which contains a pressure source...
09/19/2006
6957779Foldable, refillable, sustained-release fluid delivery system
The invention described herein is a framed fluid delivery device that is made up of a fluid-delivery cartridge for the timed-release delivery of a fluid contained therein, and a frame assembly for retaining the fluid delivery cartridge. The frame assembly is made up...
10/25/2005
6949081Sensing and interactive drug delivery
An interactive drug delivery system includes a drug delivery module, an optical probe, a local controller, and an optional central controller. The drug delivery module is constructed and arranged to deliver selected amounts of a drug into a subject. The optical prob...
09/27/2005
6939556Minimally compliant, volume efficient piston for osmotic drug delivery systems
An osmotic pump having a minimally compliant, volume-efficient piston positioned within a capsule is provided. The capsule has an interior surface, a beneficial agent, and an osmotic agent. The piston is movable with respect to an interior surface of the capsule, an...
09/06/2005
6926846Methods of using an oxygen scavenger
An oxygen scavenging packet containing an iron-based oxygen scavenger and an electrolyte is set forth in which the rate of uptake of oxygen is increased by virtue of the introduction into the packet of an oxygen uptake accelerator containing water. Methods of increa...
08/09/2005
6830560Automatic syringe
A syringe comprises a barrel containing an internal cylindrical body containing a liquid and communicating with a delivery needle. The needle is covered before use by a removable sheath, and after the sheath is removed, the needle is concealed by a displaceable slee...
12/14/2004
6562004Transdermal delivery
A device for transdermal delivery of a composition includes a housing partitioned into a delivery chamber arranged to contain the composition and a detonation chamber mechanically coupled to the delivery chamber. The detonation chamber is intended to cont...
05/13/2003
6537245Needleless syringe with a friction activated pyrotechnic initiator
A needleless syringe equipped with an initiating device comprising a triggering device and a pyrotechnic charge, wherein the triggering device contains a triggering member connected to a friction igniter that initiates the pyrotechnic charge by friction. ...
03/25/2003
6458102External gas powered programmable infusion device
An external infusion device system for infusing a fluid into a patient, the system including a reusable infusion device housing, a gas power source and disposable reservoir. The disposable reservoir is insertable into the reusable infusion device housing ...
10/01/2002
6383165System for achieving a controlled low emission rate for small volumes of liquid solutions
A system for achieving a controlled low emission rate of small volumes of liquid solutions for pest and insect management and other applications. The system has a sealed liquid solution reservoir having an outlet port, a self-powered fluid delivery microp...
05/07/2002
6099504Pre-filled injection delivery device
A syringe (10) comprises a barrel (11) containing an internal cylindrical body (12) containing a liquid (14) and communicating with a delivery needle (15). The needle (15) is covered before use by a removable sheath (16), and after the sheath (16) is remo...
08/08/2000
5947928Drug delivery system
A drug delivery system includes a container having proximal and distal ends and a rapidly openable divider, replaceably disposed within the container to separate the container into a proximal chamber that is selectively gas impermeable and able to receive...
09/07/1999
5938640Two-part fluid dispenser
A fluid dispensing device is disclosed which has interfitting pump and reservoir modules, with unique releasable tight-fitting coupling mechanism incorporated into the opposed surfaces of the modules. Use of the two interfitting modules permits repeated r...
08/17/1999
5871125Chemically driven liquid delivery pumping device
A liquid delivery pumping device for the delivery of liquids enterally or parenterally comprises a housing including a gas generating chamber, wherein a gas is generated intermittently when two reactants, such as the components of an effervescent couple, ...
02/16/1999
5785688Fluid delivery apparatus and method
An apparatus (120) useful for, among other things, subcutaneous drug delivery includes a housing (124), a fluid reservoir (154) disposed within the housing for storing the fluid, a pump or pressurized chamber for pressurizing a driving gas and exerting a ...
07/28/1998
5741275Device for the intentional and controllable distribution of a liquid or viscous material
A device for controllably dispensing a liquid or viscous material comprises a chamber which is subdivided by a piston into a pressurized gas chamber and a mass chamber. The container includes electrochemical, tablet-shaped, completely enclosed diffusion e...
04/21/1998
5738657Ambulatory energized container system
An ambulatory infusion and/or KVO (keep vein open) system (12, 18) has a gas-pressurized bladder arrangement (12) including a gas barrier associated therewith. The system includes a flexible bag of solution (13) inserted in a sleeve portion (36) of the bl...
04/14/1998
5704520Liquid material dispenser and valve
A liquid material dispenser, for use, for example, in dispensing liquid medicine over an extended period of time, which includes a housing (10) enclosing a reservoir (12) for storing the liquid to be dispensed and having an outlet (14) through which the l...
01/06/1998
5700245Apparatus for the generation of gas pressure for controlled fluid delivery
The present invention relates to apparatus and method for the controlled delivery of fluid. The apparatus comprises chemical reactants which combine to generate gas and create pressure to drive a fluid from a container. The reactants and the environment i...
12/23/1997
5571261Liquid delivery device
A liquid dispensing device and the method of dispensing liquid are disclosed. The device includes a hollow gas- and liquid-tight casing, a flexible gas- and liquid-tight membrane having multiple convolutions disposed across the casing interior and dividin...
11/05/1996
5558255Liquid delivery device
A liquid dispensing device and the method of dispensing liquid are disclosed. The device is uniquely suited to meet the requirements of hospitals and other institutions for long shelf life in inert condition and ready activation when needed. The device in...
09/24/1996
5553741Liquid delivery device
A liquid dispensing device and the method of dispensing liquid are disclosed. The device is uniquely suited to meet the requirements of hospitals and other institutions for long shelf life in inert-condition and ready activation when needed. The device in...
09/10/1996
5540665Gas driven dispensing device and gas generating engine therefor
The present invention provides a gas generating engine for driving a beneficial agent dispensing device. The engine comprising (a) a solid composition comprising an acidic compound or a basic compound, or a combination thereof, and (b) a means for maintai...
07/30/1996
5527288Intradermal drug delivery device and method for intradermal delivery of drugs
An intradermal drug delivery device for delivering a liquid drug to a subject via the subject's skin includes a housing having a lower surface provided with an adhesive coating for adhering the housing to the subject's skin. An expansible-contractible cha...
06/18/1996
5425706Dispensing device particularly useful for dispensing nutritional liquids
A dispensing device particularly useful for dispensing nutritional liquids includes an electrolytic cell having electrodes and an electrolyte capable of generating a gas upon the energization of the electrodes, which gas causes the dispensing of the liqui...
06/20/1995
5354264Gas pressure driven infusion system by hydrogel electrolysis
A drug delivery device is described which utilizes gas pressure from free oxygen and hydrogen derived from the electrolysis of water at the electrodes in negatively charged polymeric hydrogels by electro-osmosis. The gas pressure forces the infusion of th...
10/11/1994
5279544Transdermal or interdermal drug delivery devices
A transdermal drug delivery device includes a liquid reservoir for a liquid drug to be delivered, and a drug delivery body which includes a plurality of tubular elements extending through the body, each having an inlet end communicating with the liquid re...
01/18/1994
5242406Liquid delivery device particularly useful for delivering drugs
A delivery device for delivering a liquid containing a drug includes a first diaphragm within a housing defining a first contractible-chamber on one side of the diaphragm for holding a supply of the liquid to be delivered, and a second contractible chambe...
09/07/1993
5224936Automatic self-protecting hypodermic needle assembly
An automatic self-protecting hypodermic needle assembly comprising a hypodermic syringe having a housing, a moveable plunger in the housing, a medicant chamber formed between the housing and the plunger, and a hollow needle extending from the housing in c...
07/06/1993
5090963Electrochemically driven metering medicament dispenser
A liquid material dispenser includes a rigid housing having a flexible partition defining first and second compartments on opposite sides of the partition, and an electrolytic cell in the first compartment capable of generating a gas when energized by a s...
02/25/1992
5062834Device for dispensing a liquid particularly useful for delivering medicaments at a predetermined rate
A device for dispensing a liquid, particularly a medicament, at a predetermined rate, includes a container including a displaceable partition to define a first expansible-contractible chamber on one side for receiving the liquid to be dispensed, and a sec...
11/05/1991
4969873Device for dispensing active substances to a patient
Septum for implantable devices for dispensing active substances, for example medicaments, to the body of the patient. The septum is inserted as a cover of a medicament chamber into the associated opening by means of one or more clamping members, the septu...
11/13/1990
4969874Infusion device
An insert head (102) is tightly inserted in the rearward end of a commercially available ampoule (101) equipped with a plunger (100). A galvanic, gas-generating cell is arranged in the insert head (102). The plunger (100) is driven forward by the gas gene...
11/13/1990
4902278Fluid delivery micropump
A prime mover module used in a fluid delivery micropump, especially for pharmaceutical purposes, transports an electrochemically active material, such as oxygen, at a steady rate across an ion exchange cell to apply external pressure to a collapsible rese...
02/20/1990
4892778Juxtaposed laminated arrangement
A dispenser is enclosed for delivering a beneficial agent to an enviroment of use. The dispenser comprising a wall that surrounds an internal space comprising a first mean in the dispenser for changing from a dispenser state to an environment of use state...
01/09/1990
4886499Portable injection appliance
The portable appliance is of use for the subcutaneous or intradermal injection of a liquid formulation of an active principle and it comprises in combination: a supply vessel for the formulation; an injection needle adapted to communicate with the vessel;...
12/12/1989
4793825Active silicon implant devices
A medical implant for injecting into the vascular system of animals comprises a device less than 500 μm in size carrying signal processing means for providing an output in response to an input signal. The input may be acoustic, electromagnetic, temperatu...
12/27/1988
4640445Portable and wearable injector of mini size
A portable and wearable injector of mini size is disclosed, which may be operated for injection by means of a gas pressure and which is equipped with an injector syringe and a gas-impermeable flexible bag received in the syringe having one open end for in...
02/03/1987
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