838 results about "Flap valve" patented technology

Described herein are nasal respiratory devices and methods for treating a variety of medical diseases including snoring and sleep apnea through the use of such devices. In general, these devices include an airflow resistor, such as a flap valve and a holdfast for securing the device in communication with the subject's nasal cavity. The devices may be configured to include leak paths to regulate the expiratory pressure when worn by a subject. Methods for using these devices may include securing a device over or at least partially within (or both of) a subject's nasal cavities.

A lid with a raised drink-through spout (24) has a hinged flap valve (28) covering a drink opening (26′) formed in the surface of the spout. The user opens the valve by pushing the top of a post (28P) on the flap (28F) down. A hinge (28H) holding the flap urges the flap to return to its closed and horizontal orientation, but the top edge of the post will catch under a catch edge of the opening opposite the hinge. This holds the flap open. The user can then drink from the spout. To re-close the valve, the user applies inward force to the outer sidewall (16) below the catch edge. This causes the wall to deflect inwardly and the catch edge to distort outwardly, widening the hole. This releases the post, allowing it to move upwardly so that the flap can spring back to its horizontal and closed position.

Described herein are nasal respiratory devices and methods for treating a variety of medical diseases including snoring and sleep apnea through the use of such devices. In general, these devices include an airflow resistor, such as a flap valve and a holdfast for securing the device in communication with the subject's nasal cavity. The devices may be configured to include leak paths to regulate the expiratory pressure when worn by a subject. Methods for using these devices may include securing a device over or at least partially within (or both of) a subject's nasal cavities.

A prosthetic valve in the form of a flap valve which includes one or more flaps arranged to allow movement of liquid through the valve only in one direction, in which the or each flap is made of a flexible open work structure of a medically acceptable metal such as titanium or a titanium alloy.

An aircraft air-conditioning system provides ventilation, air-conditioning and fire protection for a below-deck stairwell and cargo hold that may be equipped with passenger sleeping compartment containers. An air mixing unit mixes fresh air and recycled air to supply mixed air through a first supply air main line (31) and a supply air unit (21) into the freight hold (4), and through a second supply air main line (32) into the stairwell (5). A trimming air unit (7A) provides hot bleed air from the aircraft engines into the mixed air supplied through the first and second supply air main lines (31, 32). An exhaust air line (11) extracts exhaust air from the freight hold (4), while an exhaust air supplemental line (15) extracts exhaust air from the stairwell (5), both of which are connected to an exhaust air main line with an exhaust air ventilator (16) that blows the exhaust air overboard. A bypass line (8) provides bypass air if needed for the demands of the ventilator (16). Regulating valves and non-return flap valves in the supply air line and in the exhaust air line regulate the flow of air and prevent back-flow. Temperature sensors are connected to a controller that regulates the temperature of the mixed supply air to achieve a comfortable temperature in the freight hold and in the stairwell. In the event of fire, the air valves are closed, to seal-off the freight hold (4) and prevent the spread of smoke into the stairwell or other ventilated areas.

A fuel tank opening-closing device includes a flap valve mechanism situated inside a tank opening forming member and having a flap valve mechanism; and an opening-closing activation mechanism adapted to selectively set the flap valve mechanism to a locked position or an unlocked position. The opening-closing activation mechanism includes a cover covering the peripheral edge portion of the opening-closing member and having a cover body produced by being split into arcuate shapes of prescribed width; a nozzle detection mechanism having introductory push parts that are adapted to receive force of motion in the insertion direction by a fueling nozzle; locking members which engage or disengage from the opening-closing member; and a locking mechanism having and adapted to move the locking members from the locked position to the unlocked position through interlocking operation with the introductory push parts.

An infusion beverage brewing system includes a container and an infuser. The infuser is positioned in a liquid, such as hot water, and has an infusing chamber for containing infusible materials, such as tea leaves. A plunger includes a piston with a peripheral seal and flap valves. After a brewing time has elapsed, an individual pushes on an operator to move the piston past a perforated wall portion of the infusing chamber. When the piston reaches a solid wall portion at the bottom of the infusing chamber, the flap valves open to allow liquid to escape. However, small apertures aligned with the flap valves prevent the passage of the infusible material. Consequently the infusible material is isolated from the liquid when the piston reaches a solid bottom wall portion of the infusing chamber.

An exhaust valve includes a flapper valve that is pivotable within an exhaust component between open and closed positions. The flapper valve is supported on a shaft that is coupled to an actuator. The flapper valve comprises a disc-shaped body that is fixed to the support shaft such that the disc-shaped body is asymmetrical about the axis of rotation.

An infusion beverage brewing system includes a container and an infuser. The infuser is positioned in a liquid, such as hot water, and has an infusing chamber for containing infusible materials, such as tea leaves. A plunger includes a piston with a peripheral seal and flap valves. After a brewing time has elapsed, an individual pushes on an operator to move the piston past a perforated wall portion of the infusing chamber. When the piston reaches a solid wall portion at the bottom of the infusing chamber, the flap valves open to allow liquid to escape. However, small apertures aligned with the flap valves prevent the passage of the infusible material. Consequently the infusible material is isolated from the liquid when the piston reaches a solid bottom wall portion of the infusing chamber.

An actuator element suitable, for example, for actuating a rotatable disk or a flap valve shaft. The actuator includes a housing, a drive situated in the housing, and at least one position detector, in which a movably mounted piston rod in the housing is operatively connected to the drive for exerting a force effect, and in which the position detector includes at least one stationary Hall sensor and at least one magnet movable relative to the Hall sensor such that the magnet produces a magnetic field for generating a magnetic flux.

A shoe pad includes air pumping elements for cooling the interior of a shoe. The pumping elements include forward pumping elements for pumping air from back to front, and backward pumping elements for pumping air from front to back. The pad includes an upper sheet attached to a lower sheet. Each pumping element includes a channel on the lower sheet covered by the upper sheet. The channel has an intake and an exhaust. Cavities are distributed along the channel. Resilient blisters on the upper sheet are aligned with the cavities on the lower sheet to define pumps. Each pump has an intake and an exhaust. Flap valves projecting down from the upper sheet are respectively positioned against the intakes of the pumps. Alignment pins projecting down from the top sheet are positioned in alignment holes on the lower sheet.

The integrated deep sea sediment sampling and holding device includes sampling mechanism comprising weight mechanism, hoisting mechanism, sampling and holding barrel, energy accumulator and tongue mechanism; and sealing bin comprising bin body, flap valve, lower end cap, lower gland and turned cone. It has combined sampling and pressure holding barrel with sealed upper and lower ends, compact structure, relaxed hoisting requirement, and raised pressure and bending strength of the barrel. The device can sample sea bed sediment as well as water, gas, natural gas, etc., and hold the temperature, pressure and sample components and state, and is released and recovered with geological winch on ship and without needing other power source. It has also pressure releasing valve and gas separator interface for separating dissolved gas in sample and post-treatment.

The present invention relates to microfluidic systems, including valves and pumps for microfluidic systems. The valves of the invention include check valves such as diaphragm valves and flap valves. Other valves of the invention include one-use valves. The pumps of the present invention include a reservoir and at least two check valves. The reservoir may be of variable volume. The present invention also relates to a flexible microfluidic system. The present invention additionally relates to a method of making microfluidic systems including those of the present invention. The method includes forming a microfluidic system on a master, connecting a support to the microfluidic system and removing the microfluidic system from the master. The support may remain connected to the microfluidic system or the microfluidic system may be transferred to another substrate. The present invention further relates to a method of manipulating a flow of a fluid in a microfluidic system. This method includes initiating fluid flow in a first direction and inhibiting fluid flow in a second direction and may be practiced with the valves of the present invention.

This invention provides a safety valve with on-line detecting function, which comprises upper valve body, lower valve body, valve seat and flap assembly, wherein the upper and lower valve body are dismountable fixed connecting structure, the valve seat and flap assembly are in the space formed by the upper and lower valve body; the flap assembly comprise sealing flap, valve rod, spring, upper clamp ring and lower clamp ring; inside the safety valve also has a sensor fitted in the flap assembly. When locating a sensing element on the internals, it will be integrated with the safety valve, or being an inner detecting element providing state variable parameter of the measured, or change the working element to monitoring element, by which can increase the safety of using kinds of pressure devices.

A cooling air arrangement for an aircraft air conditioning unit includes an air inlet, a heat exchanger, an outlet plenum, first and second air outlet channels branching from the plenum, and a fan arranged in the first outlet channel. During flight of the aircraft, external ram air driven into the air inlet flows primarily through the second outlet channel. During ground operation, the fan primarily sucks cooling air through the first outlet channel, which merges back into the second outlet channel at an air mixing junction that functions as an injector nozzle and a non-return flap valve. The first outlet channel is provided in a spiral housing of the fan, or in a smooth curved duct. The air inlet and outlet of the cooling air arrangement, and the air outlet of the air cycle machine, are oriented in the same direction, e.g. the flight forward direction.

The invention relates to a flap valve structure of a pressure-maintaining coring device. The flap valve structure comprises a valve seat and a valve flap, one end of the valve flap is movably connected with the upper end of the valve seat, the top of the valve seat is provided with a valve port sealing surface matched with the valve flap, the valve port sealing surface is a conical surface, the valve flap is provided with a valve flap sealing surface matched with the valve port sealing surface, and the taper of the valve flap sealing surface is the same as the taper of the valve port sealing surface; the valve port sealing surface is provided with a bearing surface for supporting the valve flap; and when the valve flap is closed, the bottom of the valve flap abuts against the bearing surface of the valve seat. According to the flap valve structure of the pressure-maintaining coring device, when the valve flap is closed, displacement constraint is applied to the bottom surface and the side surface of the valve flap, the anti-deformation capability of the sealing surface can be effectively improved, the valve can bear higher pressure, and the pressure maintaining capability of the valve is improved; and the valve seat has magnetism, and the valve flap can be attracted to be closed.

The breast pump shield assembly includes a breast shield having a parabolic shape with upper and lower apertures. A conduit in fluid communication with the lower aperture receives the expressed milk and directs it to a container. A vacuum introduces through the upper aperture creates a suction within the breast shield. A center insert fits closely within the lower aperture and has a flared end with an annular surface for contacting and applying an outward force against a circular area around the nipple. A stepped-down distal section of the center insert has an outlet end with a flap valve to prevent suction from being drawn into the breast milk container while permitting expressed milk to flow into the container.

The present invention relates to an improved flap valve or other internal component for use with respiratory suction catheter and manifold assemblies. This flap valve or other internal component provides the assembly with an improved mechanism for cleaning the tip of the catheter without drawing an excessive amount of air from the respiration circuit to which the endotracheal catheter is attached. More specifically, the present invention relates principally to a closed suction endotracheal catheter system which provides improved cleaning of the catheter while minimizing air drawn from the patient's ventilation circuit by providing at least one protrusion on at least one surface of the flap valve or other internal component. By using a flap valve or other internal component with at least one protrusion, the flap valve or other internal component is strengthened and designed to prevent the flap from scraping mucus or other secretions from the catheter onto the distal surface of the flap during retraction.

An energy-saving reversed-opening type flap valve comprises an outward-flowing pipeline (1), a flap valve seat (2) and a flap valve (7), wherein a hinged shaft support (4) is arranged below the flap valve seat (2), a rotating shaft (5) is arranged in the hinged shaft support (4), the flap valve (7) is in seamless contact with an outline of the flap valve seat (2) by the rotating shaft (5), and a counter weight (6) is arranged below the flap valve (7). The energy-saving reversed-opening type flap valve has the advantages that the opening angle range of the flap valve is expanded to be 10-90 degrees, and head loss is reduced; when the flap valve is closed, the gravity center of the flap valve is close to the rotating shaft (5), the rotating inertia of the flap valve is low, and the closing dead center position of the flap valve is close to the top part when the flap valve is closed; the closing negative pressure is low, so that the closing impact force is low, the vibration times are reduced, the energy-saving reversed-opening type flap valve has the functions of achieving the silence effect, protecting a pipeline and prolonging the service life of hydraulic buildings.

The invention relates to a pump intended to be mounted on a bottle so as to enable a liquid contained in said bottle to be dispensed, said pump including a pump body, an atomizer secured to a push button, a means for the elastic return of the translatory motion of said atomizer in said body, and a plunger mounted in frictional contact against the internal surface of said body so as to define a dosing chamber which is in communication with the liquid by means of a clack valve, wherein the plunger is mounted coaxially around the atomizer in an association zone, said association zone being arranged so as to enable sealed swiveling between the plunger and the atomizer.

The invention discloses a pressure maintaining rock core transfer device and method. The pressure maintaining rock core transfer device includes a transfer chamber, the transfer chamber is a hollow cavity with openings at both ends, the front end and the rear end of the transfer chamber are separately connected with a transfer tube through sealing washers, a rock core chamber and support frames are arranged in the transfer chamber, one ends of the support frames are fixedly connected with the outer wall of the rock core chamber, the other ends of the support frames are connected with the innerwall of the transfer chamber through pulleys, so that the rock core chamber can slide in the transfer chamber, the transfer tube is provided with a flap valve and a driving mechanism connected to theflap valve, the transfer tube at the rear end of the transfer chamber is connected with a sealing valve through a quick connector, the other end of the sealing valve is connected with an adapter, andthe sealing valve moves under the action of the driving mechanism to realize the sealing of the transfer chamber; the transfer chamber is also connected with a pressure balancing control unit, the pressure balancing control unit comprises a safety valve, a shut-off valve, an accumulator and a pressure gauge, the pressure gauge is connected with the transfer chamber, the accumulator is connected with the transfer chamber through the shut-off valve, and the other end of the shut-off valve is connected with the safety valve; and the pressure maintaining rock core transfer device is suitable forall types of pressure-maintaining core-taking operations.

A toilet is provided with a vacuum to assist in the flushing process. The vacuum is provided downstream between the toilet bowl and a waste outlet to draw the waste contents of the toilet bowl and out of the toilet bowl to the waste outlet under pressure. A controllable valve connected to a vacuum source is connected in a discharge passage between the toilet bowl and the waste outlet. The valve is opened to apply vacuum to the discharge passage upon activation of a toilet flush actuator and closes prior to the waste contents of the toilet bowl reaching the location of the valve. A normally closed flap valve is connected between the discharge passage and the waste outlet to define a minimal amount of air in the discharge passage which is removed by the vacuum.

The present invention provides a check valve for use in a vacuum sewage pipe. The check valve includes a body having a sewage inlet and a sewage outlet to be coupled to the vacuum sewage pipe, a flap valve element disposed in the body and rotatably supported by a shaft, and a closing mechanism. The closing mechanism can keep the flap valve element in a closed state so as to allow the flap valve element to function as a gate valve. The closing mechanism can also limit an opening degree of the flap valve element so as to allow the flap valve element to function as a check valve.

A flap valve is disclosed having a first spigot and a closure flap with an annular extension adapted to snugly fit within an outlet end of the first spigot and a flange integral with the annular extension adapted to circumscribe the outlet end. The flap valve having a second spigot of smaller diameter than the first spigot forming an extension to the first spigot.

Described herein are nose-reduced nasal devices configured to reduce or eliminate the unwanted noises associated with use of a nasal device. These noise-reduced nasal devices include a flap-valve airflow resistor and a noise-reduction feature that is a noise-reduction element, a noise-reduction flap valve, or both. The noise-reduction feature typically prevents the flap valve from oscillating or vibrating and producing an audible sound during use, particularly during inhalation through the device. The method and devices described herein may prevent the flap, and particularly the edge region of the flap face or tip of the flap, from oscillating during inhalation.

The invention discloses a hydraulic driven mechanical hand-held seafloor sediment truth-preserving sampler and a sampling method. The sampler includes a hydraulic source, a pressure holding cylinder,a sampling tube, a flap sealing mechanism and an opening valve. The flap sealing mechanism is installed at the opening at the bottom of the pressure holding cylinder. The flap sealing mechanism comprises a flap valve base and a flap valve. The flap valve base is connected to the pressure holding cylinder in a seal connection way. The flap valve close to a valve hole is hinged to the flap valve base. A torsional spring is arranged between the flap valve and the flap valve base. A sampling tube is inserted into the pressure holding cylinder. The sampling tube is provided with a sampling tube piston fitting to the inner hole of the pressure holding cylinder. The sampling tube and the valve hole on the flap valve base are coaxial. A hydraulic source is connected to an oil inlet of an opening valve through a pipe. An oil outlet of the opening valve is connected to the through hole on the side wall of the pressure holding cylinder through a pipe. The top of the pressure holding cylinder is provided with a returning hole. The returning hole and the inner cavity at the flap valve installation position are communicated through a pipe. The hydraulic driven mechanical hand-held seafloor sediment truth-preserving sampler has a simple and compact structure and is easy to operate. Through the pressure holding cylinder, the sampling truth-preserving effects are ensured.

The invention discloses a vacuum induction melting furnace, which relates to a crucible furnace that is suitable for charging treatment in vacuum or special atmosphere. The invention provides an improved vacuum induction melting furnace with better casting cooling effect and good productivity, which comprises a vacuum melting chamber, a medium frequency coil furnace, a set of vacuum pump and a corresponding vacuum pipeline system, a electric control system, a medium frequency power supply system, a hydraulic cylinder control system, a cooling system, and a pit discharging system. The cooling system is provided with a tundish feed divider, a belt wheel cooling mechanism, a baffle cooling mechanism and a turning wheel cooling mechanism. The pit discharging system comprises a medial chamber box, an inner container, an outer container, a walking car, a hydraulic lifting cylinder, a pit track, a flap valve and a guide shell. The guide shell and the flap valve are arranged in the medial chamber box, the outer container is fixedly arranged on the walking car, and the inner container is sheathed at the inner wall of the outer container.

A combined half mask respirator and eye protector is provided, portions of the mask above the respirator being open to provide air circulation behind a lens and reduce misting of the lens. A face seal for the respirator of elastomeric material inhibits air leakage from the respirator to behind the lens, and outlet from the respirator is controlled by a flap valve which offers minimal flow resistance, also for preventing development of overpressure in the respirator and leakage of air to behind the lens.

A plastic screw cap includes two cap halves, which are produced as plastic injection-molded parts and have an internally threaded segment and an inwardly directed ring shoulder segment. The two halves of the screw cap can be pushed together, for example, on the inlet connection of the valve body of a flap valve by tongue-and-groove joints. One cap half has two hook-like ends, each of which is provided with an inwardly sloped clamping sidepiece and a groove for receiving the tongues formed on the two ends of the other half of the screw cap.

The invention discloses a garden leaf suction and compression device, which comprises a fallen leaf collection cylinder, a falling flap valve, a fallen leaf filter cylinder and a stainless steel wire mesh pressing plate. A fallen leaf filter cartridge is welded inside the fallen leaf collection cylinder; the fallen leaf filter cartridge is set as a fallen leaf collection compression chamber, and the front end of the fallen leaf collection cylinder is provided with a fallen leaf input port, and the fallen leaf input port is connected to the fallen leaf collection compression chamber; the fallen leaf filter cartridge The inner slide is equipped with a stainless steel wire mesh pressure plate; the structure is high in strength, convenient and quick to move, saving time and effort, and it is convenient to suck the fallen leaves into the leaf filter cartridge and filter out the fallen leaves, so as to realize the suction of the fallen leaves in the garden, under the compression of the stainless steel wire mesh pressure plate , The fallen leaves filtered in the fallen leaf filter cartridge are pressed into cakes and discharged from the falling flap valve to realize the compression of fallen leaves, improve the efficiency and convenience of compressed and discharged fallen leaves, and facilitate the continuous and uninterrupted absorption of fallen leaves in the garden.