692results about How to "Eliminate leaks" patented technology

The present invention relates to a medical device and method for treating the body tissue of a patient. The present invention is also directed to a method of making the medical device and a method of using the medical device. More particularly, the invention relates to a medical device which is inserted into the body for delivery of therapeutic patches to the surface of a body lumen, organ or cavity. Specifically, the medical device has an umbrella-like or a basket-like expandable assembly; and a therapeutic patch. The expandable assembly is capable of changing from a retracted position to an expanded position. The expandable assembly can be self-expanding or non-self-expanding. In one embodiment, the medical device comprises an elongated member; an umbrella-like expandable assembly which has a plurality of wire elements; and a therapeutic patch. The therapeutic patch comprises a sheet having two opposing surfaces wherein one of the surface comprises an adhesive material and at least one biologically active material. The other opposing surface is disposed onto the plurality of wire elements of the umbrella-like expandable assembly. In another embodiment, the medical device comprises an elongated member, a basket-like expandable assembly having a plurality of wire elements; and a therapeutic patch. The therapeutic patch is disposed onto the plurality of wire elements of the basket-like expandable assembly.

A patient interface gas delivery mask having a forehead and chin support system including a forehead support, a chin support, and a system for supplying a flow of gas to a patient that incorporates such a mask, forehead support, and chin support. The forehead support includes a supporting arm which is adjustably mounted to the mask shell, thereby allowing the adjustment of the distance between the forehead support bracket and the mask shell in order to adjust for patient's of different sizes. A forehead support bracket is pivotally connected to the support arm. Likewise the chin support is also adjustably mounted to the mask shell.

A beverage dispenser and method of operation, in which incoming water for beverage preparation is heated by a liquid-to-liquid heat exchanger. The heated water may be mixed with cold water using controlled valves, to generate a selected temperature stream. This controlled-temperature stream may be mixed with beverage concentrate or sprayed over coffee grounds to brew fresh coffee.

A one-piece soft spout valve assembly (10) for attachment to a drinking cup (12) includes a diaphragm (11) having a body (17), a spout portion (20) and a valve portion (22) integrally formed in the body (17). The body (17) has an outward surface (30), an inward surface (32), and a peripheral edge (16). The peripheral edge (16) delineates the outward surface (30) from the inward surface (32). Furthermore, a groove (18) is circumferentially formed in the peripheral edge (16) for fixedly attaching to a drinking cup (12). The spout portion (22) and the valve portion (22) form a cavity (23) within the inward surface (32) of the body (17) and a drinking opening (21) within the spout portion (20) on the outward surface (30) of the body (17), whereby fluid may pass from the cavity (23) to the drinking opening (21) through the valve portion (22) when the valve portion (22) is forcibly actuated by the spout portion (20) in response to an externally applied force by an user.

Embodiments of the invention provide new fittings and fitting assemblies for tight, leak-proof filter and fluid connections in a pump useful in dispensing fluid onto wafers during a semiconductor manufacturing process. One embodiment of a fitting assembly comprises an o-ring-less low profile fitting and a low profile male threaded locking nut. A manifold of the pump is machined with a female threaded hole for receiving the fitting and the locking nut. The fitting has higher compressibility than the manifold. Initially, as one end of the fitting touches the bottom of the receiving hole, there is a small gap between the end of the fitting and the bottom of the receiving hole. As the fitting is pressed down, the end of the fitting that touches the bottom of the receiving hole begins to deform and fill the small gap, thus creating a tight seal between the fitting and the manifold.

An interconnect structure is provided in which the conductive feature (i.e., conductive material) is not coplanar with the upper surface of the dielectric material, but instead the conductive material is recessed below an upper surface of the dielectric material. In addition to being recessed below the upper surface of the dielectric material, the conductive material of the interconnect structure is surrounded on all sides (i.e., sidewall surfaces, upper surface and bottom surface) by a diffusion barrier material. Unlike prior art interconnect structures, the barrier material located on the upper surface of the recessed conductive material is located with an opening including the recessed conductive material.

There is provided a non-contact, passively suspended blood pump that includes (a) a housing; (b) a pump rotor within the housing, wherein the pump rotor has a first end and a second end, and an axis of rotation; (c) a first axial thrust bearing across a first axial gap, between the first end and the housing, that axially suspends the first end; (d) a second axial thrust bearing across a second axial gap, between the second end and the housing, that axially suspends the second end; (e) a first radial hydrodynamic bearing that radially suspends the first end; and (f) a second radial hydrodynamic bearing that radially suspends the second end. Determining pump differential pressure by monitoring rotor axial position allows automatic physiologic control.

Electrically erasable programmable “read-only” memory (EEPROM) cells in an integrated circuit, and formed by a single polysilicon level. The EEPROM cell consists of a coupling capacitor and a combined read transistor and tunneling capacitor. The capacitance of the coupling capacitor is much larger than that of the tunneling capacitor. In one embodiment, field oxide isolation structures isolate the devices from one another; a lightly-doped region at the source of the read transistor improves breakdown voltage performance. In another embodiment, trench isolation structures and a buried oxide layer surround the well regions at which the coupling capacitor and combined read transistor and tunneling capacitor are formed.

An injection molding nozzle is provided having a first sealing member to substantially eliminate the leakage of molten material from around the injection nozzle. A second sealing member is configured to substantially reduce the leakage of a pressurized fluid, such as air, which may be used to open and close a valve stem associated with the injection nozzle.

The invention discloses a method and a device for measuring a radon exhalation rate on a medium surface. The measuring method comprises a measuring process and a calculating process. The measuring method comprises the following steps: during measurement, inversely covering a radon accumulation chamber on the surface of a medium to be measured; connecting a sealed measuring chamber with the radon accumulation chamber to form a loop; after collecting a certain time period of 5 minutes, turning on an air pump to mix the radon in the radon accumulation chamber and the measuring chamber at a smallflow rate less than 3L/min for 5 minutes, wherein at this time, the radon concentration in the measuring chamber is the radon concentration in the radon accumulation chamber at the time T; repeatedlymeasuring the radon concentration in the radon accumulation chamber to obtain a group of data of radon concentration in the radon accumulation chamber at equal time intervals by taking T which is greater than or equal to 10 minutes as a period; and solving the radon exhalation on the surface of the medium to be measured according to a theoretical formula. The measuring device consists of the radon accumulation chamber, the air pump, the measuring chamber, a secondary instrument and a drying pipe, wherein one end of the air pump is connected with the radon accumulation chamber, while the otherend is connected with the measuring chamber through a pipe; one end of the drying pipe is connected with the radon accumulation radon through a pipe, while the other end is connected with the measuring chamber through a pipe; and the secondary instrument is connected with the measuring chamber.

A stent-graft with increased longitudinal flexibility that is deployed within a body lumen for supporting the lumen and repairing luminal aneurysms. In a preferred embodiment, the stent-graft is located and expanded within a blood vessel to repair aortic aneurysms. The stent-graft is comprised of an expandable stent portion, an expandable graft portion and at least one elongated rail. The stent portion and graft portion are moveable between the terminal ends of the rail(s) and relative to the rails so that it can conform to the shape of a vessel in which it is deployed. The stent-graft provides increased longitudinal flexibility within a vessel. Also, the stent-graft of the present invention does not kink after expansion, and thus, eliminates the potential for the graft portion occluding the blood flow lumen of the vessel in which it is deployed. Moreover, the wear on the graft is reduced and its longevity increased.

An apparatus for combining optical radiation, wherein the apparatus comprises a bundle of input optical fibres formed of glass, a taper, and an output optical fibre, wherein the taper is fused to the output optical fibre; and the apparatus comprises at least one cladding mode stripper to strip out higher order modes that would otherwise degrade a polymer coating on at least one of the input optical fibres and the output optical fibre.

A roll-up door assembly for a variety of uses for example commercial vehicles, commercial buildings, residential buildings or other suitable purposes. The door assembly includes a flexible unitary panel constructed from a material comprising a fiber and resin composite. A plurality of transverse support bars are affixed to the flexible panel. Rollers are rotably mounted on an axle and are adapted to be received in a track for guided movement of the flexible panel. The axle can be integral with the transverse reinforcement member or part of a roller bracket affixed to the transverse reinforcement member. Alternately, the flexible panel can be provided without rollers and can be received in and guided by a slotted track.

Endosteal fixation of a ligament graft with a bioabsorbable interference screw installed in a retrograde manner in ACL reconstruction. The bioabsorbable interference screw is insert-molded with a length of suture extending from the distal tip of the screw for pulling the interference screw into the joint and into position for retrograde insertion at the top of the tibial tunnel. The interference screw has a cannulation extending partially through the screw from the leading tip. The cannulation is shaped to receive a correspondingly shaped driver. The driver is inserted into the tibial tunnel to engage the screw. By turning the driver, the interference screw is turned into the tibial tunnel in a retrograde manner. Accordingly, interference fixation of the graft near the tibial plateau is provided, thereby eliminating graft abrasion at the tibial plateau tunnel opening.

A system for controlling gas leakage in a solids delivery system is provided. The system includes a bulk solids pump comprising an inlet for a particulate material and an outlet for discharge of said particulate material. The system also includes a buffer gas channel configured to impede backflow of process gas into the bulk solids pump, such as from a downstream system or process. The system further includes a pressure differential system configured to control a flow rate of the buffer gas and maintain a positive differential in pressure between the buffer gas and the process gas.

The system comprises a RF receiving subsystem, an A/D converter, a digital baseband signal process subsystem, a digital down-conversion subsystem, a clock subsystem, a MCU subsystem and a frequency automatically-controlling subsystem. The output end of the RF receiving subsystem is sequentially connected to the A/D converter, digital down-conversion subsystem and the output end of the digital baseband signal process subsystem.

A roll-up door assembly for a variety of uses for example commercial vehicles, commercial buildings, residential buildings or other suitable purposes. The door assembly includes a flexible unitary panel constructed from a material comprising a fiber and resin composite. A plurality of transverse reinforcement members are affixed to the flexible panel. Rollers are rotably mounted on an axle and are adapted to be received in a track for guided movement of the flexible panel. The axle can be integral with the transverse reinforcement member or part of a roller bracket affixed to the transverse reinforcement member.