492 results about "Reflux valve" patented technology

In certain embodiments, a vial adaptor comprises a housing member, a connector configured to couple the adaptor with a vial, and an extractor channel formed in the housing member. The extractor channel is configured to facilitate withdrawal of fluid from the vial when the adaptor is coupled to the vial. In some embodiments, an anti-reflux valve is positioned within the extractor channel. The anti-reflux valve can be configured to impede or obstruct fluid returning to a fluid source after withdrawal of the fluid from the fluid source.

A continent ostomy port device has a generally planar face plate defining a selectively sealable aperture which is alignable with the opening of a stoma formed in the body of a user of the device. A closure portion is connected to the generally planar face plate adjacent to the aperture and is adapted to permit selective and repeatable covering and uncovering of the aperture in the generally planar face plate. A catheter portion extends from one side of the face plate and extends proximally, and one end of the catheter portion is disposed interior of the user's body, within the ostomy site, when the port device is in normal use position. The catheter portion has continuous and generally cylindrical exterior and interior side walls, the latter defining a major lumen. The catheter portion is sized and shaped appropriately for non-surgical insertion through a stoma to a sufficient distance that the presence of the catheter portion within the stoma provides a physical barrier which reduces the incidence of stoma prolapse, without the use of extraneous, externally applied materials or additional surgery. A removable cartridge is sized and shaped to fit snugly and slideably within the major lumen of the catheter portion of the device so as to be liquid-tight and to thereby prevent inadvertent escape of body waste material from the stoma through the device when the cartridge is in place, so that the user is not required to wear an ostomy bag, and to further thereby clean the interior side wall of the catheter portion as the cartridge is pressed into the major lumen of the catheter. A selectively operable anti-reflux valve that is attached internally of the proximal end of the catheter portion and is activated when it is desired to prevent escape of body waste through the port device, and deactivated when it is desired to permit passage of fluid through the port device. Retaining structure is connected to the catheter, and is non-surgically, snugly fittable into the stoma, to cause the port device to be self-retaining in a normal use position within a stoma of the user, without the need for special surgery and extraneous, external fixation materials such as tape, belts, and adhesives.

A grummet, for covering the end of an instrument channel of an endoscope, has a cone-shaped surface providing an entrance and forming an anti-reflux valve.

A humidifier for use with a pressure support system. The humidifier includes a body having an inlet, a fluid holding chamber, and an outlet. The inlet is positioned upstream and in fluid communication with the fluid holding chamber. The outlet is positioned downstream of and in fluid communication with the fluid holding chamber. A back-flow preventing valve is positioned upstream of the fluid chamber. The back-flow preventing valve is movable between an open position, in which the inlet is unblocked, and a closed position in which the inlet is blocked. In the closed position, the back-flow preventing valve prevents fluid, fluid vapor, or both from entering the pressure support via the inlet to the humidifier.

The present invention is directed to an improved anesthesia manifold and an improved induction valve mechanism. A plurality of induction valve elements may be joined or “ganged” together in order to define a manifold. In the preferred embodiment of the induction manifold, at least two individual valve elements are combined to form the manifold. Each of the plurality of valve elements includes the following components: (1) a valve body; (2) a first inlet port carried by the valve body and defining at least in part a central fluid communication flow path for supplying intravenous fluid to patient; and (3) a second inlet port carried said valve body and at least in part defining an anesthesia drug inlet. Each of the plurality of valve components: (1) an induction valve mechanism which maintains said second inlet port in a closed condition until a predetermined amount of pressure is applied thereto; (2) a back flow valve mechanism which maintains said induction valve components in open condition to permit at least one of the following operations: (a) aspiration; (b) back flow; (c) purging; and (d) sampling.

Additionally, a control mechanism is provided for each of the plurality of individual valve components to actuate said induction valve mechanism and said backflow valve mechanism.

An inflatable structure comprising an inflation compartment defining an enclosed interior volume and an anti-reflux valve having an outlet end positioned in the interior volume. The anti-reflux valve includes an elongate inflation passage including opposedly facing film layers that are bonded to one another at their edges to form an interior gas flow channel. The elongate inflation passage is bonded to the inflatable compartment to form an opening for introduction of gas into the passage, for inflation of the inflation compartment, and arranged so that upon termination of gas flow into the interior volume, after pressure in the interior volume has been raised above exterior pressure on the inflatable compartment, gas pressure in the interior volume collapses the opposedly facing film layers against one another to form a seal against the interior volume gas pressure and maintain the inflation compartment in an inflated state.

A unitary three valve filter element support is used in a filter cartridge in which the filter cartridge includes an annular filter element within a housing closed by an end plate having a central opening surrounded by an array of radial openings spaced a fixed radial distance from one another. The unitary support has an annular sealing lip for sealing with the end cap of the filter element, which sealing lip deflects under oil pressure providing a first valve to allow oil to bypass the filter element if the filter media of the filter element is clogged. A second valve is a dirty side anti-drainback valve that is provided by a radial flange projecting from the unitary body. A third valve is a clean side valve aligned with the hollow core of the annular filter element to prevent drainback of clean oil and to prevent refilling of the filter cartridge with used or unfiltered oil.

A urine collection bag formed of at least one flexible sheet of material defining a fluid reservoir is disclosed which includes an anti-reflux valve. The anti-reflux valve includes a housing defining a fluid receptacle which opens into the fluid reservoir. The housing is secured to the urine collection bag such that the opening of the receptacle is covered by the at least one sheet of material. A cut-out is formed in the sheet of material below the housing opening to define a flap which overhangs the opening in the fluid receptacle. The flap is movable into the fluid reservoir to allow fluid to flow from the receptacle into the reservoir. Fluid flow from the reservoir towards the receptacle causes the flap to seal against a peripheral rim of the housing and, thus, is substantially prevented.

A compression release engine brake unit includes an oil outlet passage formed in a socket brake, which stores engine brake oil, and a reset member opening or closing the outlet passage. The reset member discharges the engine brake oil by opening the oil outlet passage in response to the rotation of a rocker arm during engine braking and, thereby, the engine brake restores the initial state. Since the compression release engine brake can restore the initial state, the return valve lift is the same as when the compression release engine brake is not actuated. Accordingly, the valve does not butt against an engine piston.

Apparatus and methods are provided for controlling a double-acting hydraulic cylinder during a load-induced rod-extending operation, where the cylinder is activated by fluid supplied from a reservoir by a pump, and the cylinder has a rod end, a head end, a piston connected to a rod for engaging the load, the cylinder piston being urged toward the rod end by the load during the operation. The apparatus includes a cylinder activating circuit including an activation valve for providing a flow path from the pump to the cylinder head end; a flow regeneration circuit fluidly connecting the cylinder rod end and the cylinder head end and configured for providing flow from the cylinder rod end to the cylinder head end during rod extension, the regeneration circuit including a regeneration flow valve; and a controller operatively connected to the regeneration flow valve and the activation valve, the controller being responsive to rod-extending rate demands from an operator to control the activation valve to provide flow from the pump to the head end and to control the regeneration valve to provide flow from the rod end to the head end. The cylinder activating circuit also includes a return flow path and a return valve positioned in the return flow path and configured to control flow from the cylinder rod end to the fluid reservoir. Both the activation valve and the return valve are controllable by the controller independently from the regeneration flow valve.

Disclosed are esophageal anti-reflux valve prostheses, and tools and procedures for peroral implantation and extraction of the prostheses. The prostheses disclosed have a semipermeable membrane to allow retrograde passage of gas, magnets disposed at a distal end of the sleeve to facilitate closure, and an outwardly bendable array of spikes that are longitudinally aligned for peroral insertion and lockable into a radially outwardly deployed configuration to keep the prosthesis from dislocating implantation. The implantation tool has inner and outer concentric tubes, the inner tube releasably threadably connected to the prosthesis, the outer tube reverse threaded with the inner tube to advance a distal headpiece to engage, deploy and lock the spikes into the deployed configuration. A vacuum assist can be used to help impact the lumen wall on the spikes. The extraction tool is similar to the implantation tool with an inner tube for threadably engaging the prosthesis, an outer tube with a distal crown with a plurality of shoes to unseat and unlock the spikes, and an overtube shield to receive the spikes and facilitate extraction of the prosthesis.

The present invention relates to a prosthetic anti-reflux valve for treating gastroesophageal reflux disease (GERD) and methods for its use. The preferred methods described provide for transoral insertion of a prosthetic anti-reflux valve and its fixation within the stomach interior. One advantage of such preferred embodiment of the present invention over prior devices is the elimination of the need for fixation of a prosthetic device within the esophagus, thus permitting a more natural and less obstructed, and even unobstructed, function of the esophagus. A first aspect of the invention provides a prosthetic valve for implantation in the stomach of an animal proximate to the esophagus to inhibit reflux of matter from the stomach to the esophagus without substantially inhibiting movement of matter from the esophagus to the stomach comprising a device having an esophageal surface and a gastric surface, wherein the gastric surface is contoured such that the device is thinner around the perimeter than away from the perimeter.

Devices, systems, and methods for treating gastro-esophageal reflux disease (GERD) include anti-reflux valves and retainers for securing them within the lumen of the esophagus, stomach, or a hiatal hernia. The retainers contain inflatable balloons, some of which may be enveloped by a flexible shell that is used to secure the balloon to tissue. Devices with more than one balloon, a low-profile leaf valve, and a sleeve valve are used to treat reflux in patients with a hiatal hernia. The leaf valve may also be configured for its control by constriction by gastrointestinal lumen muscle, through radial compression of the valve's flange. Bi-directional combination valves are used to treat or diagnose patients with reflux due to transient lower esophageal sphincter relaxations (TLESR). Those valves pass reflux through a channel in which gas and liquid reflux are separated. Methods are described for treating GERD patients who (1) have no hiatal hernia, (2) have a hiatal hernia that is fixed in place, or (3) have a hiatal hernia that slides above and below the diaphragm. Methods are also described for delivering GERD-treatment devices to their target locations within the patient's gastrointestinal tract.

Apparatuses to enable single-point valve control of siphons, siphon pumps, metering siphon pumps, and turbine siphon pumps include terminal anti-backflow valves, a system flow control valve, a metering chamber, a self-regulating chamber, and a siphon turbine. The terminal anti-backflow valves provide automatically closable systems without further priming after an initial prime. The system flow control valve consolidates functions for priming, pumping, dispensing, and siphon flow regulation to provide single-point valve control. The metering chamber operated by a single-point system flow control valve enables periodic dispensing of liquid above a supply source. The self-regulating chamber controls a single-point system flow control valve to regulate a metering chamber for periodic dispensing. The siphon turbine provided with terminal anti-backflow valves and regulated by a single-point system flow control valve enables hydropower production. Benefits include precision control, single-point operation, safety, new applications, energy savings, installations without power facilities, and a renewable clean energy technology.

The production method of coating compound includes the following steps: placing the liquid material into a liquid material buffer feeding cylinder, opening vacuum pump to evacuate the dispersion emulsifying grinding still to negative pressure, opening liquid material feeding valve and feeding the liquid material into the dispersion emulsifying grinding still, the closing the liquid material feeding valve, adding adjuvant, opening powder material feeding valve and adding pigment anjd filling material, then closing valve and vacuum pump, dispersing for 20 min., starting basket sand mill and pipeline multi-stage wet grinder for about 20 min., stopping basket sand mill, dispersing machine and high shear emulsifying machine, closing reflux valve, opening vacuum pump to negative pressure and opening emulsion feeding valve, adding pigment and adjuvant, regulating pH value, filtering and barrelling to obtain the invented product.

Flow control safeguards are integrated into a blood collection system on a disposable component such as the post-operative surgical drain tube leading from the patient to the collection device. One aspect of the invention prevents suction levels that are too high for the tissue and organs adjacent at the surgical site by providing a vacuum relief valve integrated into the drain tube. In another aspect of the invention, reverse flow of fluid back to the patient is prevented by integration of an anti-reflux valve into the surgical drain tubing.

The present invention relates to a method and system for controlling intelligently fuel supply by gasoline engine. The fuel system comprises an oil pump, an injection guide, a pressure reflux valve, a gasoline tank, a check valve and an oil supply and return pipeline. Wherein, a pressure sensor and an intelligence controller, a transmitting bus, a sound and light alarm circuit are increased. After calculating and judging of control software of microprocessor of intelligence controller, outputs a certain pressure to the oil pump engine, at the same time, the microprocessor detects pressure signal of pressure sensor amends voltage transmitted to the oil pump motor at any moment according to the pressure signal to remain stabilization of system pressure, and detecting, judging problems resisted in fuel supply system to give off sound and light alarm in time. The present invention saves energy, reduces consume, can detect fuel supply system intelligently and determine faults and alarm, enhances the initiative safety of vehicle on moving.