82results about How to "Reduce liquid leakage" patented technology

A system and method for performing tissue therapy may include applying a reduced pressure to a tissue site of a patient. A fluid parameter associated with applying a reduced pressureto the tissue site may be sensed. An audible fluid leak location sound may be generated in response to sensing the fluid parameter. The audible fluid leak location sound may be altered in response to sensing that the fluid parameter changes. By altering the audible fluid leak location sound in response to sensing a change of the fluid parameter, a clinician may detect location of a fluid leak at the drape by applying force to the drape. The force applied to the drape may be a clinician pressing a finger onto an edge of the drape.

A device and method for delivering and injecting fluid into heart tissue utilizing high pressure injection to increase injectate (fluid) retention in the heart tissue. The catheter includes a shaft having an infusion lumen extending therethrough, wherein the proximal end of the shaft connected to a pressurized fluid source capable of generating a transient pressure of more than 1000 psi. The distal end of the shaft includes a nozzle having an injection port in fluid communication with the infusion lumen such that fluid from the pressurized fluid source may be delivered to the heart tissue at a sufficiently high exit velocity to partially penetrate the heart tissue.

A fuel cell system has an improved connector assembly to provide for the quick connection of a fuel cartridge and the fuel cell. Two leak resistant connector members with an easy to engage coupling mechanism that stably grips the two connector members to provide for flow between the members. The first connector member is adapted to engage the second connector member to form a unitary structure, which can establish fluid communication between the connector members. Generally, both the first connector member and the second connector member comprise a fluid flow path that can be each sealed / unsealed by a poppet valve or other suitable valve members. In some embodiments, the connector members can be engaged / disengaged by rotating an element of the coupling mechanism. The connector assemblies can be particularly useful for the connection of a fuel cell with a fuel cartridge.

A device and method for delivering and injecting fluid into heart tissue utilizing a laterally directed needle to increase injectate (fluid) retention in the heart tissue. The device may comprise a catheter having a shaft wherein the distal end of the shaft includes a primary penetrating member and a secondary penetrating member. The secondary penetrating member includes an injection lumen in fluid communication with a pressurized fluid source. The primary penetrating member penetrates the heart tissue at the injection site in a first direction, and the secondary penetrating member penetrates the heart tissue in a second direction different from the first direction such that fluid leakage from the injection site is reduced and the volume of treated tissue is increased.

The present application provides a porous sintered multicomponent applicator nib and methods of making and using these nibs. The porous nibs are made from sintered plastic particles. These nibs are used with liquid applicators devices, medical devices, writing tools or cosmetic applicators to apply liquids containing high solids or pigments to surfaces such as metal, paper, skin, hair, tissue or a wound.

Methods and devices include having a container (1) for holding a liquid with a viscosity μ, and a porous wick (5) with an average pore size of at least about 4 microns to about 50 microns and a porosity ε between about 0.20 to about 0.75, and having a length L and a total exposed surface area A exposed to the ambient air. The viscosity of the liquid and the dimensions of the wick are such that a quantity A / μL is in a range of about 4×10−4 to about 18 cm / poise.

A fuel cell system has an improved connector assembly to provide for the quick connection of a fuel cartridge and the fuel cell. Two leak resistant connector members with an easy to engage coupling mechanism that stably grips the two connector members to provide for flow between the members. The first connector member is adapted to engage the second connector member to form a unitary structure, which can establish fluid communication between the connector members. Generally, both the first connector member and the second connector member comprise a fluid flow path that can be each sealed / unsealed by a poppet valve or other suitable valve members. In some embodiments, the connector members can be engaged / disengaged by rotating an element of the coupling mechanism. The connector assemblies can be particularly useful for the connection of a fuel cell with a fuel cartridge.

In a dye sensitized photoelectric conversion device having an electrolyte layer (6) between a semiconductor electrode (3) including, for example, fine semiconductor particles to which a sensitizing dye is adsorbed and a counter electrode (5), two kinds of dyes are used as the dye, and the two kinds of dyes are adsorbed onto the surface of the semiconductor electrode (3) at the sites different from each other. The fine semiconductor particles include, for example, TiO2. Tris(isothiocyanate)-ruthenium(II)-2,2′:6′,2″-terpyridine-4,4′,4″-tricarboxylic acid and 2-cyano-3-[4-[4-(2,2-diphenylethenyl)phenyl]-1,2,3,3a,4,8b-hexahydrocyclopent[b]indol-7-yl]-2-propenoic acid are used, for example, as the two kinds of dyes. Thereby, a dye sensitized photoelectric conversion device such as a dye sensitized solar cell capable of obtaining higher light absorption rate and photoelectric conversion efficiency than in a case of using one kind of dye at high purity, as well as a manufacturing method thereof are provided.

In a dye-sensitized photovoltaic device including a semiconductor fine particle layer 2 on which a sensitizing dye is adsorbed, a counter electrode 3, and an electrolyte layer 4 between the electrodes, a molecule having a plurality of acid functional groups for adsorption onto the semiconductor electrode is used as a molecule of the sensitizing dye, and part of the acid functional groups is neutralized with an alkaline compound which is a hydroxide of at least one metal or compound selected from the group consisting of Li, Na, K, tetramethylammonium, tetraethyl ammonium, tetrapropyl ammonium, tetrabutyl ammonium, an imidazolium compound, and a pyridinium compound. In this manner, a dye-sensitized photovoltaic device that can achieve high photoelectric conversion efficiency even in the cases where a dye containing readily aggregating acid functional groups, such as carboxylic acid, as the adsorbing groups is used. A method for making the device is also provided.

A membrane seal includes a pair of confronting annular sealing grooves. A first annular sealing member is received in one of the oppositely facing sealing grooves and a second annular sealing member is received in the other of the oppositely facing sealing grooves. The first and second sealing members are sealably connected together by an annular membrane. A pressure difference across the membrane forces the first and second sealing members into contact with a side wall of each of the oppositely facing sealing grooves to effect a seal. Known sealing members have a circular cross-section but in the present invention at least one of them has an oval cross-section. The oval cross-section gives the first and / or second sealing member(s) a larger zone of contact with the oppositely facing sealing groove(s). This reduces the amount of wear on the first and / or second sealing member(s) and produces a better seal.

The present invention provides a solenoid valve able to control flow amount as desired without receiving influence of change in fluid pressure. In the present invention, in a control valve for opening and closing a first poppet valve 103 and a second poppet valve 104 by a solenoid portion, a first pressure receiving area S1 which is a seating area of the first poppet valve 103, a second pressure receiving area S2 which is a seating area of the second poppet valve 104, a third pressure receiving area S3 which is a pressure receiving area of a first pressure sensing portion 145 and a fourth pressure receiving area S4 which is a pressure receiving area of a second pressure sensing portion 155 are made approximately equal to each other. Thereby unbalanced forces received from fluid flowing in and out when each poppet valve is actuated are all canceled.

A device and method for delivering and injecting fluid into heart tissue utilizing a laterally directed needle to increase injectate (fluid) retention in the heart tissue. The device may comprise a catheter having a shaft wherein the distal end of the shaft includes a primary penetrating member and a secondary penetrating member. The secondary penetrating member includes an injection lumen in fluid communication with a pressurized fluid source. The primary penetrating member penetrates the heart tissue at the injection site in a first direction, and the secondary penetrating member penetrates the heart tissue in a second direction different from the first direction such that fluid leakage from the injection site is reduced and the volume of treated tissue is increased.

A spray shield for a bearing assembly of an electrical machine includes a shield disposed intermediate an outermost bearing and rubber seal lip of a seal. The shield has an aperture allowing a rotor shaft to extend therethrough. The seal is configured to at least one of reduce hydraulic pressure at the seal lip and reduce a liquid leaking through the seal lip.

A transmission for use in the power train of a motor vehicle has a rotary first component (such as a shaft), a second component which may but need not be rotatable, a fluid-conveying conduit having a first end portion extending into a first socket provided in the first component and a second end portion extending into a socket of the second component, a split-ring piston packing located in an external groove of the first end portion, and an O-ring received in an external groove of the second end portion. The O-ring prevents the conduit and the second component from rotating relative to each other. A passage which is defined by the two components and the conduit can receive a stream of pressurized hydraulic fluid from a pump by way of pipes wherein the flow of fluid is controlled by several valves including a manually operated slide valve, at least one preferably adjustable pressure regulating valve, at least one preferably adjustable safety valve, and adjusting means for the adjustable valve or valves; such adjusting means can employ one or more signal-responsive control valves.

A refillable fluid container system having a pressure control architecture in which persistent air bubbles are released from a capillary or foam fluid reservoir and are directed from an optical level sensing system in a liquid fluid reservoir.

A liquid cartridge includes a liquid storing portion that stores liquid therein, a liquid path that is in fluid communication with the liquid storing portion, a sealing member that is selectively penetrated and closed, and a storage. The storage includes a first count storage area configured to store first count data corresponding to a number of times the sealing member has been penetrated at a first position, and a first position sealing data corresponding to a first number that is comparable to the first count data.

A mechanical-hydraulic machine and an integrated hybrid drive with a regenerative force assist for eliminating pumps and intensifiers and reducing the energy consumption, operating costs, investment costs, weight and size of machines and improving their performance. The integrated hybrid drive is comprised of common mechanical and hydraulic components. The regenerative hydraulic force assist converts gravitational and deceleration forces of the machine into fluid pressure, stores the fluid pressure and applies the fluid pressure to clamping of dies or molds and / or performing machine operations. A closed loop control system controls the flow of fluid between the hydraulic drive and regenerative force assist.

A device and method for delivering and injecting fluid into heart tissue utilizing a laterally directed needle to increase injectate (fluid) retention in the heart tissue. The device may comprise a catheter having a shaft wherein the distal end of the shaft includes a primary penetrating member and a secondary penetrating member. The secondary penetrating member includes an injection lumen in fluid communication with a pressurized fluid source. The primary penetrating member penetrates the heart tissue at the injection site in a first direction, and the secondary penetrating member penetrates the heart tissue in a second direction different from the first direction such that fluid leakage from the injection site is reduced and the volume of treated tissue is increased.

A plurality of fin groups 12 each comprising parallel plate fins 14 are arranged on two straight tube portions 11a of a fin fixing hairpin tube 11 longitudinally of the tube portions at a spacing, by forming two tube inserting holes 14a as spaced apart in each of the plate fins 14 and inserting the two straight tube portions 11a through the respective holes 14a of the plate fins 14. The hairpin tube 11 is enlarged with use of a fluid to fixedly fit the plate fins 14 of the fin groups 12 around the straight tube portions 11a of the tube 11. The straight tube portions 11a of the tube 11 each have a finless part 13 provided between each pair of adjacent fin groups 12. The finless part 13 of each straight tube portion 11a bears clamp marks 19 on the outer peripheral surface thereof. A heat exchanger comprising a heat exchanger finned tube 10 thus constructed is adapted to diminish leakage of the refrigerant and achieves a desired refrigeration efficiency.

A hand held appliance comprising an outer wall, an inner wall, a fluid flow path extending within the inner wall from a fluid inlet into the appliance to a fluid outlet, a fan unit disposed within the inner wall for drawing fluid in through the fluid inlet and a seal disposed between the outer wall and the inner wall. Fluid in the fluid flow path may flow from the fluid inlet to an upstream end of the fan unit, through the fan unit to a downstream end of the fan unit and on to a fluid outlet. The seal may be downstream of the fluid inlet. The seal may be downstream of the fan unit. The outer wall may comprise a handle of the appliance. The seal may comprise an o-ring, a lip seal or any over moulded seal.

Centrifugation systems are provided that have a non-contact seal assemblies including an upper guard and a skirted pivot, as well as a pressure source that provides a gas flow between the upper guard and a surface of the skirted pivot. In some embodiments, the non-contact seal assembly further includes a lower guard having one or more capillary channels defined on an upper surface.