121results about How to "Negative pressure" patented technology

A treatment system includes a fluid cooling supply system for chilling and delivering liquid coolant to a patient. The fluid cooling supply system includes a cooling device and a heat exchanger device. The heat exchanger device is biased to the cooling device and is in fluid communication with a treatment device in a patient. The fluid cooling supply system includes at least one biasing mechanism to provide a given biasing force between the heat exchanger device and the cooling device to effectuate and improve heat transfer. The liquid coolant may be circulated through an energy delivery device positioned in an airway of a patient to preserve tissue. The system is controlled to circulate liquid coolant at a given temperature and pressure for a selected amount of time during pulmonary treatment of a patient.

A cartridge unit 10 for an inkjet printer, with an ink storage compartment 46 and an ink feed system 30 for connection to a printhead 22. The ink storage compartment has a displaceable wall section 48 so that its variable storage volume 46 is variable. The displaceable wall 48 is biased 54 toward expanding the variable storage volume 46 so that there is a negative pressure in the ink storage volume 46, such that ink does not inadvertently leak from the ink ejection nozzles. Without negative pressure, an ink meniscus can bulge from the nozzles. The meniscus will ‘pin’ itself to the edge of the nozzle aperture and may be strong enough to stop ink leakage. However, paper dust or other contaminants will eventually stop the bulging meniscus from pinning itself on the nozzle rim and leakage occurs. A negative pressure in the ink storage volume makes the meniscus invert back into the nozzle aperture. As the meniscus does not bulge out of the nozzle, paper dust on the nozzle surface does not break the surface tension to cause leakage.

A printhead for an inkjet printer, the printhead comprising: a printhead integrated circuit formed on a wafer substrate using lithographically masked etching and deposition techniques; an integrated circuit support structure for mounting in the printer adjacent a media feed path; and, a polymer sealing film between the integrated circuit support structure and the printhead integrated circuit for fixing the printhead integrated circuit to the integrated circuit support structure.

A pagewidth inkjet printhead is provided. The printhead comprises (a) a plurality of nozzles formed on a frontside of a substrate, each nozzle having a respective nozzle inlet; and (b) a plurality of ink supply channels. Each ink supply channel is configured for supplying ink from a backside of the substrate to a corresponding group of nozzle inlets. Further, each ink supply channel has an aspect ratio of less than 4:1, the aspect ratio being defined by the ratio of the channel depth to the channel width. A low aspect ratio allows facile backside etching of the ink supply channels.

A printhead for an inkjet printer, the printhead comprising: a printhead integrated circuit having an array of ink ejection nozzles formed on a substrate; a plurality of ink feed conduits for establishing fluid communication with at least one ink storage compartment; and, a polymer sealing film between the ink feed conduits and the printhead integrated circuits, the polymer film having an array of apertures such that the ejection nozzles are in fluid communication with the ink feed conduits; wherein, the polymer sealing film is more than 25 microns thick.

A liquid cartridge includes: a cartridge case including a case body having an opening at its one side and a lid member covering the opening of the case body; and a liquid accommodating part that is provided in an internal space defined within the cartridge case, at least a part of the liquid accommodating part being made of flexible material, wherein an air communicating path having one end communicating with an air introduction hole through which air is introduced and the other end communicating with the internal space is formed to surround the internal space in the cartridge case.

A multi-lumen catheter for use in a cavity having a main lumen surrounded by a wall, and at least one access lumen positioned in or on the wall, the one access lumen conveys a solution to the cavity and said main lumen. A method for treating or preventing fluid or accumulation in a body cavity including (a) aseptically inserting through an incision at an insertion site the catheter comprising a main drainage lumen surrounded by a wall and the one access lumen positioned in or on the wall, (b) securing the inserted catheter by closing the incision with a suture, (c) infusing a physiological solution through the one access lumen to dilute a drainage fluid, (d) connecting a distal end of a main drainage lumen of the catheter to a suction drainage system, and (e) applying a vacuum force to the suction drainage system to remove the diluted drainage fluid.

In ventilating a roof, an eave vent and a ridge vent are provided. The eave vent and ridge vent each is equipped with a fabric filter. The fabric filter is not waterproof and is wettable and hence self-cleaning. The permeability to air of the eave vent fabric filter is less than that of the ridge vent fabric filter and the resistance to air flow of the eave vent is greater than that of the ridge vent. The attic space under the roof acts as a manifold, distributing low pressure throughout the attic space.

Provided is a negative-pressure wound therapy apparatus capable of causing negative pressure in a closed space defined by a wound dressing and a wound region with a sufficient suction flow rate as needed even with a miniaturized pump device. In atypical use that needs a high suction flow rate, because a pump device (30) with a high suction flow rate is attached to a wound dressing (10) and sucks gas from a closed space (904) defined by a wound region (903) and the wound dressing (10), even when a pump device (20) for typical use is miniaturized and the suction flow rate of the pump device (20) is reduced, a therapy apparatus (100) can achieve a suction flow rate sufficient for atypical use. Thus, the pressure value in the closed space (904) can decrease to a desired value more quickly.

Disclosed are methods for using open-celled polymeric foam wound dressings made from high internal phase emulsions (HIPEs). The wound dressings have a high capillary pressure and may reduce or obviate the need for treatments like negative pressure wound treatment (NPWT). Also disclosed are structures for HIPE foam wound dressings. The HIPE foam wound dressings typically include at least two layers of HIPE foam with different, but homogeneous, average cell sizes. The average cell sizes form a cell size gradient, with cell size typically decreasing from the front or face layer of foam toward the back layer of foam. The back layer of foam may be a collapsed layer, while the front layer or layers may be expanded. Compared with HIPE foams for other absorbent applications, the wound dressing foams may be higher in hydratable salts and higher in initial moisture levels.

An electric smokeless roaster capable of eliminating ducts installed on the inside and outside of a shop and almost eliminating the generation of harmful gases such as NOx, comprising an electric heater unit (2) installed on the upper part of a casing (1), a water pan (6) installed on the lower part of the heater unit (2), a grill (9) disposed above the heater unit (2), a table (7) installed on the upper surface of the casing (1) and having an opening at the portion thereof corresponding to the grill (9), a suction unit (10) installed around the grill (9) and having suction ports for sucking air around the grill (9), an electric dust collecting unit (30) installed in the casing (1) and dedusting air sucked from the sucking unit (10), and a deodorizer (50) installed in the casing (1) and decomposing odor components contained in the air dedusted by the electric dust collecting unit (30) and exhausting the decomposed odor components to the outside of the casing (1).

An inkjet printer includes: a printhead having a first port and a second port; an ink container for supplying ink to the printhead, the ink container comprising a supply port and a return port; a first ink conduit interconnecting the supply port and the first port; a second ink conduit interconnecting the return port and the second port; and a pump configured for pumping ink from the supply port to the return port. The second ink conduit has a smaller internal cross-sectional area than the first ink conduit for providing a faster flow speed of ink in the second ink conduit relative to the first ink conduit when the pump is actuated.

Two-for-one twisting spindle having a pneumatically actuated threading device, with a spindle shaft rotatable about a vertical axis partially configured as a hollow shaft with a lower feed bore extending coaxially to the rotational axis, and with an injector element opening into a thread guide channel of a thread guide ring temporarily connectable during threading to a compressed air source. Part of the compressed air feed to the injector element is formed by the feed bore. The compressed air feed comprises a connection element (27) with a curved air channel (26), which connects the feed bore (24) to the injector element (16). The connection element (27) is configured as a separate component and the air channel (26) is adapted to the flow requirements.

A breast pump system is disclosed for cyclically applying and simultaneously monitoring the negative pressure imposed while expressing milk from a breast. Structurally, the system includes a breast shield formed with a recess for receiving a breast. Further, a collection reservoir is connected to the recess of the breast shield for receiving milk therefrom. A pump is connected in fluid communication to the recess of the breast shield for applying the negative pressure to the breast. Also, a one-way valve is positioned between the recess and the collection reservoir to permit flow of milk into the collection reservoir while preserving ambient pressure in the collection reservoir. Importantly, a pressure gauge is connected between the pump and the breast shield for monitoring the operational pressure on the breast in real time. Further, a regulator manages the negative pressure applied by the pump in response to the monitored operational pressure.

The mechanical ventilator system is a compact and portable artificial respiration system. A vortex ring generator delivers a FiO₂ mix from an air-oxygen blender to a patient's alveoli via an endotracheal tube during the s patient's inhalations, but remains idle during the patient's exhalations. Exhaust gases generated by the patient are released through an exhaust gas valve. During operation, the patient's oxygen saturation level is measured and kept in communication to receive oxygen saturation level signals and to control the oxygen proportion of the FiO₂ mix. A pressure flow sensor is fluidly coupled with the patient's airway to control actuation of the vortex generator. The flow sensor is coupled with a controller, which actuates a vortex generator trigger circuit in communication with the vortex ring generator.

The invention discloses a non-contact handling device and relates to a handling device. The device comprises a cover body with a cylindrical inner hole, gyratory fan blades arranged in the cover body and a power input shaft for driving the gyratory fan blades to rotate, wherein the central position of the top end of the cover body is provided with a power input shaft mounting hole and air sucking ports distributed on the periphery of the power input shaft mounting hole; each gyratory fan blade consists of a shaft sleeve and blades distributed on the shaft sleeve; the lower parts of the blades are vertical, the upper parts are bent, and the bending directions of the blades are consistent with the rotation directions of the gyratory fan blades; and one end of the power input shaft passes through the power input shaft mounting hole and is connected with the shaft sleeve of the gyratory fan blades in the cover body, while the other end is connected with a rotary drive device arranged outside the cover body. The device has the characteristics of low energy consumption and strong suspension force, can be driven by adopting a motor, has the advantages of low cost, wide application range, large motion range, and the like, conforms to the development trends of energy saving and high efficiency in the semiconductor industry at present and is easy to popularize and apply.