92results about How to "Prevent refill" patented technology

A cartridge for powdered pharmaceuticals. At least two storage spaces are provided which are separate from each other and which are each intended to hold a multiplicity of doses of a medically active substance. The storage spaces are individual cartridges which may be lockingly coupled together to form a single cartridge. Each individual cartridge has a metering cavity.

A respiratory pressure therapy (RPT) device is disclosed for treatment of respiratory-related disorders. The RPT device includes a pressure generator, a pneumatic block, a chassis and a device outlet for delivering a supply of flow of gas to a patient interface. The RPT device also comprises an integrated humidifier including a water reservoir. An RPT device is also disclosed that includes a wireless data communication interface integrated with the housing and configured to connect to another device or a network.

A vacuumizing-electroosmosis-stacking combined soft-foundation consolidating system consists of telescopic water drainage electrodes, a conductive circuit, a direct-current power supply, horizontal water drainage pipes and a vacuum pump, wherein the water drainage electrodes, the conductive circuit and the horizontal drainage pipes are all arranged below a vacuum film, and the telescopic water drainage electrodes with telescopic upper ends are capable of being powered on and draining water. A vacuumizing-electroosmosis-stacking combined soft-foundation consolidating method includes the technical steps of arranging plastic water drainage plates and the water drainage electrodes, connecting the horizontal water drainage pipes and leads, paving geotextile, performing vacuumizing, electroosmosis and stacking preloading, and compressing the water drainage electrodes and the like. By the vacuumizing-electroosmosis-stacking combined soft-foundation consolidating system, the difficult problem of combination of electroosmosis, vacuum preloading and stacking preloading is solved, and three foundation treatment methods of electroosmosis, vacuum preloading and stacking preloading are combined so that the vacuumizing-electroosmosis-stacking combined soft-foundation consolidating method is particularly suitable for silt-based soft foundation with low osmotic coefficient and capable of shortening foundation treatment period and improving treatment effect greatly and is an economic and practical soft-foundation treatment method.

The invention discloses a circular self-seepage recharge well head assembly, belongs to the technical field of water retention and relates to a recharge well and a well head thereof. The recharge well is positioned below the ground surface of a river bottom or trench bottom. The circular self-seepage recharge well head assembly is characterized in that a well head device covering above the well head is arranged on the recharge well and comprises a circular bottomless well cover and a geotextile reversed filter fixedly arranged on the outer side of the well cover, the well cover comprises a circular top cover and a hollow bottomless column body vertically connected to the side wall on the circumference of the top cover, the lower part of the side wall is positioned below the ground surfaceof the river bottom or trench bottom, a top cover square hole is arranged on the top cover, the side wall is provided with a side wall square hole, the recharge well is positioned at the middle of the bottom of the well head device, and gravel reversed filter materials are backfilled around the recharge well. The circular self-seepage recharge well head assembly has strong self-recharge capacity,the function of preventing low-water-level sewage from being backfilled, the function of reversed filtering and certain silt-preventing and impact-resisting capacities, is easy to construct and ensures that the gravel reversed filter materials can be saved.

The invention discloses a non-prepressing passive fluid piston pump with synchronous suction and discharge. When outside forces act on a push-pull rod of the piston 3 or a pump body 5 respectively or at the same time, and the piston 4 makes coaxial vertical and relative movement inside a pump cylinder 6, positive and negative pressure is produced on both sides of the piston 4 at the same time. An inlet column valve 7 and an outlet ball valve 11 are pressed simultaneously along with pressure conduction, and move axially from the direction of the positive pressure to the direction of the negative pressure inside the valve base. The liquid inside the pump cylinder 6 sprays towards the outlet due to the positive pressure. The negative pressure inside the pump cylinder 6 forms vacuum to suck the liquid outside the pump, so that the liquid piston pump can realize dual-stoke synchronous spray and suction.

An apparatus for humidifying a flow of breathable gas includes a water reservoir including a chamber structured to hold a volume of water, a water reservoir dock structured and arranged to receive the water reservoir in an operative position, and a latch movable between (1) a locked position to releasably lock the water reservoir to the water reservoir dock in the operative position, and (2) an unlocked position to allow insertion of the water reservoir into the water reservoir dock and removal of the water reservoir from the water reservoir dock.

A sample carrier with a sample receiver for the sample liquid and with preferably several sample chambers which are connected thereto is proposed. In order to avoid refilling with sample liquid when it evaporates or is otherwise lost or used up, there is additionally a reservoir for sample liquid which is covered in the same way as the sample chambers and which has a connecting channel to the environment which can be closed by the sample liquid.

The invention relates to a soft-off circuit and a method. An input end and an output end of the circuit are respectively connected to external control signals and the input end of a frequency/duty ratio regulating unit and comprise a first polar tube, a second polar tube, a third polar tube and a time-delay circuit; the basal poles of the first polar tube and the second polar tube are connected to the input end of the soft-off circuit; an emitter is grounded; a collector is connected to the input end of the frequency/duty ratio regulating unit by a first resistance; a signal input end of the time-delay circuit is connected to the basal poles of the first polar tube and the third polar tube; a signal output end is connected to the basal poles of the second polar tube and the third polar tube; the emitters of the second polar tube and the third polar tube are grounded; and the collector is connected to the input end of the frequency/duty ratio regulating unit. The method is as follows: after a first external control signal is received, the duty ratio/frequency is reduced to a first value; after special time interval, when the time-delay signal of the first external control signal is received, non-duty ratio or frequency output is controlled so as to realize soft-off. The invention can solve the output rebound and output energy recirculation of the prior art, thus realizing the shutdown pre-bias.

A patient controlled liquid drug administration device providing either or both of a continuous flow of a liquid drug, as well as successive boluses thereof, to be self-administered by a patient while allowing delivery of only full bolus volumes. The device includes a reciprocating pump defining a closed internal reservoir having a fixed first wall, and a second, flexible wall that is axially movable in relation to the fixed wall between reservoir-full and reservoir-empty positions. A lock is connected to a push button that activates a plunger of the pump. The lock has a first position preventing the push button from being depressed when the push button is in an extended position and the plunger is in a reservoir-empty position and a second position permitting the push button to be depressed when the push button is in an extended position and the plunger is in a reservoir-full position.

In a toner cartridge, a cover member is attached to an outer surface of a case main body so as to cover a filling hole through which a toner is filled in a toner chamber. The cover member is detachably attached to the case main body by a lock mechanism disposed between the case main body and the cover member. The lock mechanism includes two or more lock structures which lock the cover member to the case main body and a release tool which carries out a release operation of the lock structures. Each of the lock structures includes an elastic engagement claw and an engagement recess which are provided on opposite surfaces of the case main body and the cover member, respectively. The release tool is configured to allow all of the elastic engagement claws to be simultaneously displaced in a lock release direction.

The invention discloses fume filtering equipment for a petroleum refining process. The fume filtering equipment structurally comprises a filtering machine, a filtering plate assembling cover plate, apower on/off controller, support bottom plates and an impurity collection tank, wherein the filtering machine is a cuboid; the filtering plate assembling cover plate is embedded and buckled on the right side of the front end of the filtering machine; support bottom plates are both welded to the front side and the rear side of the bottom end of the filtering machine; the impurity collection tank isembedded and buckled on the lower side of the left end of the filtering machine; the power on/off controller is locked at the front end of the filtering machine. Due to adoption of constitution mechanisms such as springs, gears, chains and electromagnets, the equipment is enabled to be automatically timed to carry out automatic switching and use of a plurality of standby filtering plates, and inaddition, a former filtering plate can be descended and recycled automatically when being switched and used, so that the filtering plates can be prevented from filtration degradation, blocking or fumebackfilling in long-term use when the equipment is used, the filtering plates can be also replaced and cleaned when being used, secondary filtration can be carried out, impurities of secondary filtration can be automatically collected, and the fume filtering equipment is convenient to use.

An aerosol valve with a refill prevention mechanism is provided. The valve has a valve stem disposed in a valve housing that defines an inner chamber. The valve stem has upper passage in an upper portion of the valve stem that is provided with a flexible resilient member. The flexible resilient member is compressed on an orifice or aperture communicating with the housing to create a seal and prevent filling in an open position when pressure in the upper passage is greater than a pressure in the inner chamber. The flexible resilient member is deflected away from the orifice or the aperture when pressure in the upper passage is less than a pressure in the inner chamber to allow dispensing of a product.

The invention relates to a wellhead of a frustum-shaped internal-external water-inflow permeable inverted-filtering recharge well and belongs to the technical field of water retention. The wellhead comprises a well lid, a geotextile inverted filter and a pressurizing mechanism, the well lid is composed of a well lid top and a well lid bottom, the well lid top is arranged as a hollow-core annulus groove and provided with water inlet orifices, the well lid bottom is buried under a river bottom or trench bottom ground, the well lid is integrally a hollow-core bottomless frustum, and the hollow-core annulus groove arranged in the center of the well lid top is a cube-shaped groove with a groove bottom. The round water inlet orifices are arranged in the outer side of the well lid top, the inner side of the hollow-core annulus groove and the groove bottom. The well lid bottom is an impermeable body. The geotextile inverted filter is arranged on the outer side of the well lid and fits the outer side of the well lid and the hollow-core annulus groove in shape. The pressurizing mechanism comprises a vertical shaft and blades. Under the condition that the appearance and the size of the wellhead device are unchanged, flow capacity and silt prevention and antiseep capacity of a recharge pool can be improved obviously, service life of the recharge pool is prolonged, recharge is quickened, and recharge efficiency is improved beneficially.

A system includes a container housing an aerosol generating substrate and a product identifying compound associated with the container. The system further includes an electronic article configured toreceive the container. The electronic article includes a sensor configured to detect the product identifying compound.

The invention belongs to the technical field of water retention and discloses a paired wellhead device of an infiltration recharge well. The wellhead device comprises a hard well lid and a geotextile infiltration layer fixedly arranged on the outer side of the well lid, the well lid comprises an upper well lid portion and a lower well lid portion which are in paired arrangement, the upper well lid portion is provided with water inlet orifices, the lower well lid portion is buried below a river bottom ground or a canal bottom ground, the well lid is a hollow bottomless cylinder integrally, and the upper well lid portion is divided into two symmetrical portions by an elongated slot formed in the upper center of the well lid so as to form a left pairing body and a right pairing body. Round water inlet orifices are formed in the surfaces of the left pairing body and the right pairing body and the bottom of the elongated slot, the lower well lid portion is a watertight body, the elongated slot and water flow are the same in direction, and the geotextile infiltration layer is arranged on the outer side of the well lid and is identical to the elongated slot in shape. The paired wellhead device of the infiltration recharge well has the advantages that on the condition that the wellhead device is unchanged in overall dimension, discharge capacity and silt-preventing wash-resistant capacity of a recharge pond can be improved remarkably, and service life of the recharge pond is prolonged.

The invention relates to the technical field of air exhaust, in particular to a wind-powered exhaust system. The invention solves the problem that the prior exhaust system can not achieve on-time and overall exhaust and ventilation by providing a wind-powered exhaust system capable of preventing exhausted air from being recharged. The wind-powered exhaust system comprises a fixed air passage, an exhaust fan and air outlet, wherein an upper end of the fixed air passage is connected with a rotary air passage, and an air door is arranged at the air outlet. The wind-powered exhaust system has the advantages of no secondary pollution, environmental protection, simple maintenance and reduced labor cost, economization and practicality, effective and complete discharge of dirt air in the air passage, prevention of air-flow recharge, and ensured smooth air discharge and freshness of air.

The invention relates to a method for generating an air cushion by a heavy-duty ship and a heavy-duty hovercraft thereof. The ship contains a hull, wherein an air compressor set, a high-pressure air storage tank and an air supply pipeline are arranged in the hull, the plane part of a hull bottom is evenly distributed with air vents, and each air vent is communicated with the air supply pipeline; the air supply pipeline contains a main pipeline, branch pipelines with a certain number and air vent pipelines with a certain number, wherein the air vent pipelines are respectively communicated with each air vent, check valves are installed on the air vent pipelines, and decompressors are installed on the air vent pipelines; the water diversion position of a fore is provided with an air vent which is a center air vent, and the diameter of the center air vent is largest; and in the method, a high-pressure air layer is generated at the fore by high-pressure gas, an air bubble layer is generated at the hull bottom, the fore, the hull bottom and the water surface are isolated by air, and an air cushion is formed. The frictional resistance of the ship and water is reduced, so that the speed of the heavy-duty ship is higher under the condition of equivalent propulsive force.

The invention relates to a wide-voltage power supply control circuit which comprises an input protecting circuit, an input detecting circuit, a fuse fault indicating circuit, a control circuit, a driving circuit and an MOSFET fault indicating circuit. The input protecting circuit prevents reverse connection of two input power supplies. The input detecting circuit determines whether the two input power supplies satisfy a lowest input 10V requirement. The fuse fault indicating circuit performs fuse fault indicating on the two input power supplies. The control circuit controls the door electrode of the two-path MOS tube. The driving circuit drives the two input power supplies. The wide-voltage power supply control circuit can operate in the voltage 10V-100V. When the polarity of the power supply input end is in reverse connection, a power supply loop can be switched off automatically, thereby preventing damage of a load system caused by reverse voltage impact. The wide-voltage power supply control circuit has quick reverse current switching-off capability, and the switching-off time is not longer than 500ns, thereby effectively preventing backflow of load energy to the power supply input end or interference between the two input power supplies. Smooth switching between the two input power supplies can be realized, no oscillation occurs in the switching process.