89results about How to "Low volume" patented technology

A multi-purpose device mechanism for sensing and control of changes in brain state includes a shaft portion and extendible elements structured for insertion into target tissue of the brain of a subject patient, cooling means configured to operatively apply cooling therapy to the target tissue, stimulation means having at least one electrical contact structured to operatively apply electrical stimulation therapy to the target tissue, sensing means including at least one sensor monitoring a biological signal of the subject patient, control means responsive to the sensing means wherein the control means is structured to, in response to signals from the sensing means that indicate the presence of a pre-determined physiological condition or occurrence of an undesirable state change, automatically cause the cooling means and / or the stimulation means to initiate or terminate the cooling therapy and / or the electrical stimulation therapy respectively and an energy source for powering the various components of the multi-purpose device mechanism. A modified embodiment includes a least one spiral conduit and at least one return conduit for cycling coolant or refrigerant to and from the shaft portion and an external reservoir. Another modified embodiment includes pressurizing means for extending at least one extendable tube into brain tissue surrounding the shaft portion.

A body fluid sampling or fluid delivery system includes a polymeric support and an array of polymeric microneedles coupled to the support, each of a microneedle having a height of 500 to 2000 μm and a tapering angle of 60 to 90°. A plurality of polymeric microchannels are provided with being associated with a microneedle. The plurality of polymeric microchannels are integrally formed with the array of polymeric microneedles without bonding. At least one polymeric reservoir is coupled to the plurality of microchannels.

A disposable device is provided for culturing and / or packaging and transporting ready-to-use viable cells cultured on membranes, gels or micro porous substrata. The device includes a housing base defining an interior for culturing cells. The membrane to be used for culturing the cells is placed inside the housing base and fixed with a ring. The base is closed by a lid, which is designed to protect the underlying cells during transport as well as minimize the volume of media used during culture, as well as transport. Media leakage is prevented by the silicon gasket as well as the snaps provided in the device.

A process for reactive distillation wherein a carboxylic acid is reacted in a reaction section of a reactive distillation column with an alcohol under esterifying conditions in the presence of a catalyst to form an ester, wherein a first supply stream comprising the carboxylic acid, a second supply stream comprising the alcohol and a third supply stream comprising an inert entrainer are supplied to the reactive distillation column, wherein the first supply stream is supplied to the column at a first entry level located just above or at the top of the reaction section, the second supply stream is supplied to the column at a second entry level located in or just below the reaction section and below the first entry level, and the third supply stream is supplied to the column at a third entry level located in or below the reaction section and not above the second entry level and wherein a bottom stream comprising the ester formed and unreacted carboxylic acid is obtained and a top stream comprising unreacted alcohol, water and entrainer is obtained.

The present invention provides a steam cleaning system comprising a housing and a steam generating system for producing a low pressure, superheated saturated steam. A steam dispensing system comprising a water reservoir and a pump feeding the water into a steam producing boiler, is coupled thereto for dispensing the steam from the system to at least one first outlet port. A cleaning solution dispensing system is provided, having at least one reservoir for a cleaning solution, and a pump system for dispensing a predetermined amount of a cleaning solution from said at least one reservoir to at least one second outlet port. The at least one first and second outlet ports are positioned adjacent one another, such that a mixture of cleaning solution and saturated steam at a low pressure and low volume of steam and cleaning solution is dispensed from the system. The present invention is particularly suited to clean objects off the floor, vertical surfaces such as glass, and small areas of floor. Because of the small volume of water and chemicals used, it can be used indoors, as well as mounted on mobile platforms such as trucks, buggies, utility vehicles, automatic floor scrubbers or the like. The system also provides for cleaning of roads, sidewalks, exterior structures, or for spot cleaning or cleaning of surfaces in difficult environments. The low pressure, superheated, saturated steam cleaning assembly of the present invention provides low pressure (10 Bar) operation, and relies upon superheated steam temperatures coupled with environmentally friendly chemicals as an abrasive force, thus avoiding any collateral damage usually caused by the high pressure output. The present invention only applies 3 to 10 gallons of water an hour, depending on the size of the machine, while a conventional high-pressure washer / steamer will use 240 gallons per hour.

The present invention relates to a resonant tunneling piezoresistance microaccelerometer. Said invention utilizes the characteristics of that superlattice quantum well film has the piezoresistance effect, and on the super lattice film the resonant tunneling voltage-sensitive resistors are made, the substrate of said superlattice film can be made into peripheral base, cross-shaped cantilever connected with base and force-transferring mechanism of mass block whose periphery is connected with cantilever, and four resonant tunneling voltage-sensitive resistors are positioned in the connected place of cantilever and base. The resonant tunneling piezoresistance microaccelerometer is quantum device made up by adopting MEMS process.

Described is a sucking device with a sucking body as well as a shaft, whereby the sucking body is equipped with a recess extending in longitudinal direction of the sucking device. Said sucking device is designed in such manner that the recess, seen in longitudinal section, terminates essentially flat toward the anterior free end of the sucking body. The recess preferably extends essentially over the entire length of the sucking body. In sectional view, the shaft preferably presents an angulated shape. From a jaw-orthopedic aspect, this sucking device proves itself as particularly beneficial, whereby it simultaneously stimulates the baby / small child to uniform sucking and / or serves for position of repose.

A method for rapid collection and assay of oral fluids is disclosed. The method comprising the steps of: (a) placing an assay device into an oral cavity, (b) removing said assay device from said oral cavity; and (c) determining the presence or absence of at least one analyte. The assay device used in the method comprises: (i) an assay portion housing an immunochrornatographic lateral flow assay strip, the lateral flow assay strip containing at least one reagent selected from an antigen and an antibody that is used to detect one of the presence or absence of at least one analyte in a fluid; (ii) a neck portion extending from the assay portion, the neck portion forming a channel for delivery of fluid to said assay strip and the channel being defined by a first, narrow part proximal to the assay portion and a second part including an opening for receiving the oral fluid, wherein the second part includes a channel width that is substantially wider than the channel width at the narrow end; (iii) a collection strip in fluid communication with the lateral flow assay strip, the collection strip having a first portion disposed within the channel and a second portion protruding outwardly from the neck portion opening; and (iv) a blocking strip coupled between and in flow communication with the lateral flow assay strip and the collection strip.

A device for collecting and transporting aqueous fluid from the oral cavity to a lateral chromatographic strip for test is disclosed. The lateral chromatographic strip is placed within and extend along a cavity defined in a housing. At least one inspection site to the lateral chromatographic strip is provided to enable inspection of selected sites on the lateral chromatographic strip for test results. A porous wick material protrudes from the housing to a collection site exterior of the housing at one end and communicates to the lateral chromatographic strip at the other end. The porous wick material has particulate construction, the particles adsorbing aqueous oral fluid to transport the fluid from the mouth to the lateral chromatographic strip without substantial absorption. The particles of the porous wick material are bound together to define a continuous interstitial volume for the flow of oral fluid to be transported and are treated to be hydrophilic to the adsorbed oral fluids. The porous wick material readily releases oral fluid to the lateral chromatographic strip. Prevention of reverse flow to the oral cavity from the lateral chromatographic strip naturally occurs due to the circuitous flow path of the porous wick material. A bite plate is coupled to the housing and insertable between the teeth of the patient to position the porous wick in the oral cavity for collecting the oral fluid. The bite plate is typically held in place by the occlusal force of the teeth, preferably the molars and / or the bicuspids, to position the porous wick in the buccal space. By observing the lateral chromatographic strip while the test device is in the mouth immediate test results are obtained.

A device for collecting and transporting aqueous fluid from the oral cavity to a lateral chromatographic strip for test is disclosed. The lateral chromatographic strip is placed within and extend along a cavity defined in a housing. At least one inspection site to the lateral chromatographic strip is provided to enable inspection of selected sites on the lateral chromatographic strip for test results. A porous wick material protrudes from the housing to a collection site exterior of the housing at one end and communicates to the lateral chromatographic strip at the other end. The porous wick material has particulate construction, the particles adsorbing aqueous oral fluid to transport the fluid from the mouth to the lateral chromatographic strip without substantial absorption. The particles of the porous wick material are bound together to define a continuous interstitial volume for the flow of oral fluid to be transported and are treated to be hydrophilic to the adsorbed oral fluids. The porous wick material readily releases oral fluid to the lateral chromatographic strip. Prevention of reverse flow to the oral cavity from the lateral chromatographic strip naturally occurs due to the circuitous flow path of the porous wick material. A bite plate is coupled to the housing and insertable between the teeth of the patient to position the porous wick in the oral cavity for collecting the oral fluid. The bite plate is typically held in place by the occlusal force of the teeth, preferably the molars and / or the bicuspids, to position the porous wick in the buccal space. By observing the lateral chromatographic strip while the test device is in the mouth immediate test results are obtained.

An electric bicycle power structure includes a motor, a power exchange device and pedal interlocking shafts; and provides power through the motor or the pedaling pedal interlocking shafts, wherein the powerexchange device automatically switches between the motor and the pedal interlocking shafts to accomplish power saving effects. The power exchange device has a planet decelerating mechanism, a clutch and a chain wheel cover. The power exchange device is located between the motor and the pedal interlocking shaft and is capable of directly switching between these power generating devices. A chain is used to impel the gear and wheel at the chain wheel cover, and an existing transmission gear of the bicycle is employed for accomplishing transmission effects, thereby decreasing numbers of parts without changing designs of the bicycle to further reduce production costs.

The invention provides a quaternary array micro-electromechanical system (MEMS) vector hydrophone microstructure. The quaternary array MEMS vector hydrophone microstructure comprises a square substrate, wherein four cross-shaped cantilever beams are etched on the square substrate, a minitype cylindrical object is fixed in the center of each cross-shaped cantilever beam, and voltage dependent resistors are arranged on the cross-shaped cantilever beams. Included angles between the four cross-shaped cantilever beams and the square substrate are different with each other and are respectively 0 degree, 30 degrees, 45 degrees and 60 degrees. The quaternary array MEMS vector hydrophone microstructure is made through the MEMS technology and has the advantages of being highly sensitive, low in energy consumption and micro in size. Compared with the single vector hydrophone, a hydrophone made of the quaternary array MEMS vector hydrophone microstructure is high in directional accuracy, strong in space resolution ratio power and capable of solving the problem of port and starboard ambiguity. Compared with the traditional hydrophone array, the size of the array of the quaternary array MEMS vector hydrophone microstructure is greatly reduced. The quaternary array MEMS vector hydrophone microstructure is integrally formed through the MEMS technology, high consistency exists among array elements, and burden on calculation of sequential arithmetic is lightened.

A disposable device is provided for culturing and / or packaging and transporting ready-to-use viable cells cultured on membranes, gels or micro porous substrata. The device includes a housing base defining an interior for culturing cells. The membrane to be used for culturing the cells is placed inside the housing base and fixed with a ring. The base is closed by a lid, which is designed to protect the underlying cells during transport as well as minimize the volume of media used during culture, as well as transport. Media leakage is prevented by the silicon gasket as well as the snaps provided in the device.

Embodiments disclosed herein provide a pump or a multiple-pump system that can mix chemicals without dilution tanks and can dispense the mixture of chemicals in a precise and highly controllable manner, particularly useful in semiconductor manufacturing processes. In some embodiments, one or more piston pumps of similar displacement are used to mix and dispense the chemical directly. A first valve is opened to a first chemical source. A piston is moved in a first direction to a selected position in a chamber to draw the first chemical into the chamber. The first valve is closed and a second valve is opened to a second chemical source. The piston is moved in the first direction to a second position in the chamber to draw in the second chemical and mix the chemicals. The second valve is closed and the piston is moved to dispense the fluids through a dispense port.

The invention discloses an intelligent preparation method for a vermicular graphite cast iron brake drum. The intelligent preparation method comprises the following steps of adding part of pig iron, scrap steel and foundry returns into a low-frequency induction furnace for melting, and controlling the addition amount of a carburant; paving the bottom of a medium-frequency induction furnace with alayer of ferrosilicon to form a ferrosilicon layer, adding part of pig iron to form a pig iron layer, rising the temperature, and adding part of electrolytic copper and ferromanganese before the addedferrosilicon and pig iron are completely molten; pouring solution prepared in the low-frequency induction furnace into the medium-frequency induction furnace from the center of the top of the medium-frequency induction furnace through a pipeline; vermicularizing the solution in the medium-frequency induction furnace in vermicularizing casting ladles; and carrying out pouring. The intelligent preparation method for the vermicular graphite cast iron brake drum has the advantages of being high in brake drum production speed, good in brake drum quality and low in cost.