Abstract: A CO2 generating and dispensing device having container with a first space for receiving oxalic acid and water, and a second space for receiving a CO2 generator which generator is attached to a lid. The lid secures to the container. Two conductive rods extend above the lid and are attached to the CO2 generator. Electric current is applied to the rods which initiates the CO2 generation. Generated CO2 rises from the second space and out a discharge vent on the lid. An hose attached to the discharge vent direct the CO2 to a pre-determined destination.

Abstract: Small, autonomous, low cost electrochemical gas generators containing an electrochemical cell assembly, a commercially available battery and a current controlling mechanism. Current control, which defines the gas generation rate, is achieved either electronically by means of a resistor or through mass transfer control by means of a gas permeable film of known permeability. In either case, the gas generation rates are generally from 0.1 to 10 cc/day. The gas source must contain an electrochemically active gas such as oxygen or hydrogen. Air is the preferred source for oxygen. These miniature gas generators, generally are less than 1.5 cm in diameter and length, require novel, compact, electrochemical cell assemblies. Various cell assemblies, generally 1 cm in diameter and less than 05 mm thick, are described. These miniature gas generators are used for the controlled release of fluids such as pheromones, fragrances, insect repellents, and the like.

Abstract: Systems are described for the “on-site” production of substantial amounts of carbon dioxide and hydrogen. The systems include a stack of multiple electrochemical cells, which decompose organic carboxylated compounds into CO2 and H2 without leaving any residue. From a bench-top small generator, producing about 1 lb of CO2 per day to a large-scale generator producing 1 ton of CO2 per day, the process is essentially identical. Oxalic acid, either anhydrous or in its dihydrate form, is used to efficiently generate the gases. The energy required is less than 0.3 Kilowatt-hours per lb of CO2 generated. Individual cells operate at less than 1.2 volts at current densities in excess of 0.75 amps/cm2. CO2 production rates can be controlled either through voltage or current regulation. Metering is not required since the current sets the gas production rate. These systems can competitively replace conventional compressed CO2 gas cylinders.

Abstract: A device for achieving a controlled low emanation rate of small volumes of liquid solutions, such as single or multi-component solutions, fragrances, or pheromones, for pest and insect management or fragrance enhancement. The device has a housing with an upper chamber to hold a bladder containing desired liquid solution to be released, a lower chamber containing an electro-chemical gas generator, a collector pad for receiving liquid solution from the bladder, and a cap which, when translated downward, activated the gas generator which fills the upper chamber with gas exerting pressure on the bladder which in turn forces the liquid solution from the bladder onto the pad for release to the environment. The gas generator is capable of releasing gases such as hydrogen, oxygen, or carbon dioxide at extremely small, pre-determined, and adjustable rates.

Abstract: A device for achieving a controlled low emanation rate of small volumes of liquid solutions, such as single or multi-component solutions, fragrances, or pheromones, for pest and insect management or fragrance enhancement. The device has a housing with an upper chamber to hold a bladder containing desired liquid solution to be released, a lower chamber containing an electrochemical gas generator, a collector pad for receiving liquid solution from the bladder, and a cap which, when translated downward, activated the gas generator which fills the upper chamber with gas exerting pressure on the bladder which in turn forces the liquid solution from the bladder onto the pad for release to the environment. The gas generator is capable of releasing gases such as hydrogen, oxygen, or carbon dioxide at extremely small, pre-determined, and adjustable rates.

Abstract: A miniature, battery-like device is described for the generation of gases or as a power source or battery. The generation of carbon dioxide and hydrogen by electrochemical decomposition of an aqueous oxalic acid solution is detailed. One of the electrodes of the internally located electrochemical cell is in intimate contact with the cathode cap of the device, while the other electrode is under compression from an internal spring of variable length which is in electrical contact with the anode cap. The low-cost device is easy to fill and assemble. It can be used for the controlled release of small quantities of fluid, delivered at low flow rates for long periods of time, such as pheromones, fragrances, insecticides, pesticides. It can also be used as power source using liquid fuels such as methanol and ambient air as a source of oxygen.

Abstract: Systems are described for the “on-site” production of substantial amounts of carbon dioxide and hydrogen. The systems include a stack of multiple electrochemical cells, which decompose organic carboxylated compounds into CO2 and H2 without leaving any residue. From a bench-top small generator, producing about 1 lb of CO2 per day to a large-scale generator producing 1 ton of CO2 per day, the process is essentially identical. Oxalic acid, either anhydrous or in its dihydrate form, is used to efficiently generate the gases. The energy required is less than 0.3 Kilowatt-hours per lb of CO2 generated. Individual cells operate at less than 1.2 volts at current densities in excess of 0.75 amps/cm2. CO2 production rates can be controlled either through voltage or current regulation. Metering is not required since the current sets the gas production rate. These systems can competitively replace conventional compressed CO2 gas cylinders.

Abstract: A device as described for the generation of high purity carbon dioxide (CO2) and hydrogen (H2) by electrochemical decomposition of aqueous solutions of liquid and solid organic acids. A d.c. power source is used to apply a pre-selected current to an electrochemical cell, consisting of an ion permeable membrane and two electrodes. The generation rate of CO2 and H2 are continuous and proportional to the applied current; it can be stopped instantaneously by interrupting the current. Small battery operated generators can produce propellant CO2 and H2 to deliver fluids from containers other uses include the creation of anaerobic environments in incubation chambers.

Abstract: A fluid dispensing device and its method of operation are disclosed. The device includes a feedback system which allows the device to respond in a timely and measured manner to changes in the dispensing flow rate of fluid from the device. The feedback system operates effectively even under conditions where the cause of increase or decrease in flow rate is not unequivocally known or reasonably capable of direct measurement. The device has a fluid reservoir which has an outlet which optionally may have a flow or pressure resistance unit incorporated, into the outlet, and an electric (preferably electrochemical) gas generation module or reversible pump which provides gas pressure to dispense the fluid from the reservoir. A sensor is provided for detection and measurement of an internal or external operating parameter which is indicative of flow rate of the fluid being dispensed.

Abstract: A device as described for the generation of high purity carbon dioxide (CO2) and hydrogen (H2) by electrochemical decomposition of aqueous solutions of liquid and solid organic acids. A d.c. power source is used to apply a preselected current to an electrochemical cell, consisting of an ion permeable membrane and two electrodes. The generation rate of CO2 and H2 is continuous and proportional to the applied current; it can be stopped instantaneously by interrupting the current. Small Battery operated generators can produce propellant CO2 and H2 to deliver fluids from containers. Other uses include the creation of anaerobic environments in incubation chambers.

Abstract: 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 micropump, and a collector for receiving a liquid solution from the sealed liquid solution reservoir. The liquid solution reservoir has a small volume capacity in the range of 1-100 mL. The micropump is a fluid transfer device capable of delivering 1-1000 microliters/hour of liquid solution. The collector has a low emission rate in the range of 0.1-2000 mg/day. The micropump and the sealed liquid solution reservoir may be contained in a single assembly. Also the entire structure of the system may be located in a single container that may be attached to a support structure.

Abstract: A refrigeration system has a compressor, a condenser, and an evaporator connected in a loop to provide a refrigeration cycle designed for small heat loads of less than one kilowatt. The compressor has a first refrigerant compressor section connected in the loop for receiving low pressure refrigerant fluid from the evaporator and providing compressed refrigerant fluid to the condensor. A second, electrochemical gas compressor section has a gas output linked to the first compressor section for compressing the refrigerant fluid.

Abstract: Apparatus and an associated method of operation are disclosed for removal of gaseous contaminants, particularly oxygen, from closed containers. The apparatus is economical, simple to install and operate, of convenient size, and highly effective. A gas extractor communicates with a container for a gas-sensitive product. A high gas concentration in the container causes operation of the extractor until the gas concentration is reduced to a desired low level, when the extractor operation stops. Separate sensors and controllers responsive to concentrations can be present, or the extractor can be self-actuated by use as a power source of a battery which operates on gas generated by operation of the extractor. The system preferably is used for oxygen extraction from containers holding oxygen-sensitive contents. The preferred extractor includes an electrochemical cell which has a ion-permeable membrane disposed between two electrodes.

Abstract: An electrochemical cell module has an outer shell of conductive material defining a cavity, an electrolytic membrane located in the cavity, first and second pervious electrodes located on opposite sides of the membrane, and a seal member located between the second electrode and the outer shell. Contacts for connecting a power source across the electrodes are provided on the second electrode and on the outer shell on the same side of the membrane as the second electrode, and the outer shell provides a current collector for the first electrode without requiring any external leads across the module.

Abstract: An electrochemically driven syringe pump for infusion of medicament wherein the pump has a detachable barrel in which medicament can be stored and subsequently infused. The pump is further adapted for storage as the charge transfer medium is sealed in a reservoir prior to activation.

Abstract: 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 re-use of the pump module containing the permanent electrical component, with a plurality of seriatim reservoir modules. Only the reservoir module needs to be sterilized. The battery power for the pump can come from a battery positioned within the pump module, which may be used with two or more reservoir modules, or within each reservoir module, which is used only with that single reservoir module. Pumping rate may be fixed or controllable. The coupling mechanism can be central of the device or off-center and is manually operable.

Abstract: A compact, small, self-contained liquid containment and dispensing device is disclosed which included an elongated fluid reservoir/conduit, a liquid dispenser in the form of a liquid retentive matrix material, a gas pump and an electric pump activation circuit. The liquid to be administered or dispensed (e.g., a medication or fragrance vapor) is placed in the reservoir and the pump is activated, generating gas into the reservoir to expel the liquid from the reservoir to the matrix material at a controlled and essentially constant rate. Methods of use of the device to administer medications, provide vapors, and for other purposes are also disclosed. A substance to be administered (e.g., a medication or drug) which is soluble in the liquid can also be preloaded into the matrix material and administered by dissolution in the liquid. The device is sufficiently small to be easily portable and can be easily attached to a person's or animal's body for administration of medication to a human or animal patient.

Abstract: A device is described for promotion of human or animal wound healing by controlling oxygen concentration in the environment around the wound. It is light weight, portable, convenient and comfortably worn by the patient. It can operate continuously or intermittently and can patient-controllable or automatic. Its comfort, portability and effectiveness insure that it will be readily used by patients to enhance recovery from skin trauma. The device is a generally flat unit which includes components for electrochemical production of an ionic species at one electrode, transported of the ionic species across an ion permeable membrane, and reaction of the ionic species at a second electrode to be converted to a molecule which results in a net change of concentration of oxygen adjacent to the wound. Medication may also be applied to the wound within the enclosure. The electrical system can powered by an easily replaceable battery.

Abstract: A gas or fluid pressure or force sensor is disclosed consisting of a fluid-tight housing containing a supply of electrochemically active gas and an electrolytic membrane disposed to divide the housing into two chambers. The electrolytic membrane has one or more pervious electrodes disposed on each side of and in contact with the membrane. A flexible bellows or diaphragm is disposed to form one wall of the fluid-tight housing and provide the contacting surface for transferring a force or pressure to the sensor. A controller is connected to display measurements and to permit automatic sensor calibration, differential pressure-induced diffusion compensation, temperature compensation and sensor chamber pressure control. The disclosed force sensor is useful for application to robotic manipulators and the basic device is useful for measurement of the gas partial-pressure of a selected gas.

Abstract: A gas or fluid pressure or force sensor is disclosed consisting of a fluid-tight housing containing a supply of electrochemically active gas and an electrolytic membrane disposed to divide the housing into two chambers. The electrolytic membrane has one or more pervious electrodes disposed on each side of and in contact with the membrane. A flexible bellows or diaphragm is disposed to form one wall of the fluid-tight housing and provide the contacting surface for transferring a force or pressure to the sensor. A controller is connected to display measurements and to permit automatic sensor calibration, differential pressure-induced diffusion compensation, temperature compensation and sensor chamber pressure control. The disclosed force sensor is useful for application to robotic manipulators and the basic device is useful for measurement of the gas partial-pressure of a selected gas.