173 results about "Vacuum Assistance" patented technology

A biopsy device and method are provided for obtaining a tissue sample, such as a breast tissue biopsy sample. The biopsy device includes a disposable probe assembly with an outer cannula having a distal piercing tip, a cutter lumen, and a cutter tube that rotates and translates past a side aperture in the outer cannula to sever a tissue sample. The biopsy device also includes a reusable hand piece with an integral motor and power source to make a convenient, untethered control for use with ultrasonic imaging. The reusable hand piece incorporates a probe oscillation mode to assist when inserting the distal piercing tip into tissue. External vacuum holes along the outer cannula (probe) that communicate with a vacuum and cutter lumen withdraw bodily fluids while a hemostatic disk-shaped ring pad around the probe applies compression to an external hole in the skin and absorbs fluids.

The invention provides a vacuum tube attachment device for vacuum assisted wound dressings. The device is in the form of a patch that can be attached to the primary wound cover. The patch forms a substantially air-tight seal to the primary wound cover, and a vacuum tube is fixed to the patch such that the patch can be oriented on the wound cover to locate the tube near an opening in the cover to allow vacuum pressure to be communicated to the wound. The patch has an adhesive area around its perimeter for attaching the patch in a substantially air-tight seal to the wound cover at any convenient location on the cover. Several embodiments of the patch are described.

A biopsy device and method are provided for obtaining a tissue sample, such as a breast tissue biopsy sample. The biopsy device includes a disposable probe assembly with an outer cannula having a distal piercing tip, a cutter lumen, and a cutter tube that rotates and translates past a side aperture in the outer cannula to sever a tissue sample. The biopsy device also includes a reusable handpiece with an integral motor and power source to make a convenient, untethered control for use with ultrasonic imaging. The reusable handpiece incorporates a probe oscillation mode to assist when inserting the distal piercing tip into tissue. The motor also actuates a vacuum syringe in coordination with movement of the cutter tube to provide vacuum assistance in prolapsing tissue and retracting tissue samples.

Disclosed herein is a vacuum assisted auto-lancing device. The device includes a housing (200) having a body (210) which has a lever hole. An actuating lever (300) includes an actuating switch (310) seated on the lever hole and having first and second actuating steps, a switch cap (320), and a switch cover (330). The device also includes a holding unit (400) having a first stem (410), a second stem (430), and a stem cap (450). A trigger (500) has a first trigger unit activated by the first actuating step, and a second trigger unit activated by the second actuating step. A lancet holder (524) holding a lancet (522) is secured to an end of the first trigger unit. The device includes a blood collecting unit (600) having an adjusting screw, an adjusting slider, and an end cap, and a vacuum unit (700) having a plunger and a body cap.

A system and method to administer a liquid agent into a body cavity of a patient is provided. One exemplary system comprises a lumen disposed into an airway of the patient and a valve assembly coupled to the lumen. The valve assembly comprises a body portion, a first port and a second port. A pump assembly for receiving the liquid agent is coupled to the valve assembly in a fluid tight relationship. The pump assembly provides the liquid to the lumen through the first port of the valve assembly. The liquid along with a portion of secretions generated by the patient are extracted through the lumen and flow out of said valve assembly through the second port for disposal responsive to a natural body function and/or a vacuum from a vacuum source. One exemplary method comprises the steps of disposing a lumen into the body cavity of the patient, the lumen comprising a fluid port; introducing the liquid agent into the body cavity through the fluid port; and extracting at least the liquid from the body cavity through the fluid port responsive to a natural body function and/or a vacuum from the vacuum source.

A vacuum-assist artificial limb assembly (10) is provided having a socket (22) for receiving a residual limb (20). The assembly (10) includes an on-board vacuum pump and control assembly (18) with a selectively operable vacuum pump (72) controlled by a microprocessor (44). The microprocessor (44) is also connected with an on-off switch (48), pressure adjust buttons (68), a pressure read-out (66), and an alarm (70). In use, a pressure transducer (74) in communication with the interior of socket (22) and coupled with microprocessor (44) monitors negative pressure conditions within the socket, and the microprocessor (44) operates pump (72) in response to transducer pressure signals. In this manner, the vacuum-assist operation of assembly (10) is essentially automatic.

Disclosed is a prosthetic elastomeric liner, which can be used without lanyards or straps, in which, upon ambulation, perspiration is voided simultaneously with the reestablishment of a vacuum-aided seal without a vacuum pump. The liner's distal tip comprises a buttress anchored sweat port containing a one way valve continuous with a channel passing through the buttress and liner from its inner surface to its outer surface. The sweat port is connected, optionally integrally, to a prosthetic pin which is inserted into a prosthetic limb.

The invention discloses a vacuum assisted molding system of a composite, which comprises an open shaping mold comprising an upper mold and a lower mold, wherein a vacuum bag-pressing system is connected on the lower mold in a sealing manner; and a mold-pressing heating system is connected outside the mold. The invention also discloses a method for shaping a composite article by vacuum assisted molding, which comprises the following steps: preparing the open shaping mold and placing a prepreg on the lower mold, paving an isolating film, a piece of mold releasing cloth, and a breathable felt in turns, connecting a vacuum bag film in a sealing manner, and communicating a formed vacuum bag-pressing cavity with a vacuum pump; connecting the upper mold and the lower mold to the mold-pressing heating system; assembling the upper mold and the lower mold under a condition of keeping a vacuum bag pressing status, molding and pressing the prepreg by the mold-pressing heating system and heating the upper mold and the lower mold at the same time, and carrying out curing treatment after reaching a curing temperature; and after finishing the curing reaction, molding to obtain the composite article. According to the invention, the process cost is low, the generality is high, the consumption of auxiliary materials is little, and the use performance of the product can be improved.

The invention provides a vacuum assistance system detection method, a vacuum assistance system detection system, an electromobile and a failure detection method. The vacuum assistance system detection method includes the following steps: judging whether a pressure sensor fails or not; after the pressure sensor is guaranteed to be not in a failure, further diagnosing whether a vacuum pump is noneffective or not or whether a vacuum assistance system is in air leakage or not according to accurate measuring signals output by the pressure sensor. By the vacuum assistance system detection method, the vacuum assistance system can be detected accurately and comprehensively, and once the vacuum assistance system fails, failure positions can be quickly judged, so that reliability of the vacuum assistance system is effectively improved and driving safety of the electromobile is guaranteed.

Assemblies, systems, and methods convey fluid from an internal wound site or body cavity by applying negative pressure from a source outside the internal wound site or body cavity through a wound drain assembly that is placed directly inside the internal wound site or body cavity.

Vacuum-assist artificial limb assemblies (10, 94) are provided having a socket (22, 104) for receiving a residual limb (20). The assemblies (10, 94) include a vacuum pump and control assembly (18, 100, 102) with a selectively operable vacuum pump (72, 116) controlled by a microprocessor (44, 102). The microprocessor (44, 102) is also connected with an on-off switch (48, 146), pressure adjust buttons (68, 148), a pressure read-out (66, 150), and an optional alarm (70). In use, a pressure transducer (74) in communication with the interior of socket (22, 104) and coupled with microprocessor (44, 102) monitors negative pressure conditions within the socket (22, 104), and the microprocessor (44, 102) operates pump (72, 116) in response to transducer pressure signals. In this manner, the vacuum-assist operation of assemblies (10, 104) is essentially automatic. In one embodiment, a vacuumization assembly (100) including an air induction component (114) and a mated vacuum pump component (116) are located within a housing (108) forming a part of socket (104), and a separate controller (102) is coupled with vacuum component (116) for control thereof.

A method and improved foam structure for use in vacuum assisted closure therapy comprising an open cell foam structure coated with a therapeutic agent.

The invention relates to a fault diagnosis method for a blade electric vehicle vacuum assistance brake system. The blade electric vehicle vacuum assistance brake system comprises an HCU, an electric vacuum pump, a vacuum pressure sensor, an instrument, a brake pedal, a relay and a power source, the HCU is in communication interaction with the instrument through a CAN line, and the other parts are connected with the HCU through hard lines. The fault diagnosis method includes the steps that after a blade electric vehicle is powered on, a vehicle control unit collects information of a power source of the vacuum pump in real time, and whether the power source is turned off or not is judged; the vehicle control unit collects change values of the vacuum pressure in real time, and diagnosis on the conditions whether gas is leaked from the vacuum assistance brake system or not, whether the vacuumizing performance is reduced or not and whether the vacuum assistance brake system is in the continuous working state or not is made according to the working states (working and stopping) of the vacuum pump and operation of a driver to a brake. The fault diagnosis method for the blade electric vehicle vacuum assistance brake system is relatively comprehensive, systematic and clear, vacuum fault reasons can be accurately located, the driver can be alerted in time, and the traveling safety of the vehicle is improved.

The invention discloses a vacuum assisted resin transfer molding integral-forming technology of a composite material fuel-tank. A novel structural material fuel-tank is provided. Structural weight of a present fuel tank and vehicle noise level can be reduced effectively, and the novel structural material fuel-tank has characteristics of impact damage resistance, corrosion resistance and the like. Meanwhile, forming process cycle of the fuel tank can be greatly shortened, and production efficiency of the fuel tank can be raised. The technology is realized by the following technical scheme: core three-dimensional modeling; core forming-die manufacturing; soluble (fusible) core manufacturing; die preparation; laying and shaping of a reinforcing material; die locking; making of a resin solution; resin injection; resin curing; demoulding; core dissolution (fusing); and composite material product finishing. By the technology, production efficiency is high; demoulding is convenient; and cost is low.

The invention relates to a wound-stimulating unit comprising a wound-stimulating device for use in combination with a vacuum assisted closure. The closure comprises a hydrophilic body to be placed on a wound surface, a cover sealing the hydrophilic body and a skin portion surrounding the wound surface, and a vacuum system for generating an underpressure in a closure space limited by the wound surface, the skin portion surrounding the wound surface and the cover. Further, the wound-stimulating device comprises a connector provided with an intermediate channel structure having an input section and multiple output sections, the device further comprising a pressure system for supplying wound stimulating agents to the input section of the intermediate channel structure.

The invention discloses a manufacturing technology of a glass fiber/epoxy resin composite material substrate type fiber bragg grating sensor. The manufacturing technology comprises the steps that glass fiber/epoxy resin prepreg is procured to prepare a glass fiber/epoxy resin composite material substrate; a fiber bragg grating is fixed to the glass fiber/epoxy resin composite material substrate; the glass fiber/epoxy resin composite material substrate fixed with the fiber bragg grating is covered with a dry-state glass fiber cloth, vacuum aided filling of liquid epoxy resin is performed, and secondary curing molding is performed. The manufacturing technology adopts the secondary curing molding in the packaging process, the interlayer interface strength is remarkably improved, accordingly the testing precision and stability of the fiber bragg grating sensor are improved, batch production of the fiber bragg grating sensor can be achieved, and the manufacturing technology has wide market prospect and huge economic benefit.

The invention relates to a multilayer structure composite high-temperature-resistant thermal protection material and a preparation method thereof. The preparation method comprises the following steps:adopting a high-temperature-resistant fiber prefabricated body as a core layer fiber prefabricated body, and sewing single-layer fiber cloth on the surface of one side of the core layer fiber prefabricated body in a needling or puncturing mode; coating the single-layer fiber cloth with ceramic precursor sol, and carrying out pre-curing; needling or puncturing the surface of the single-layer fibercloth coated with the ceramic precursor sol to sew multilayer fiber cloth, vacuumizing, and injecting a ceramic precursor on the multilayer fiber cloth; performing overall heat treatment on the obtained sample to obtain an upper panel of the ceramic-based composite material layer; performing vacuum assisted injection of aerogel precursor sol on the finished sample, and performing supercritical drying treatment to obtain a core layer of a heat-insulating aerogel composite material layer; and laying, needling or puncturing the lower surface of the aerogel composite material layer to sew a fiberreinforcement, injecting resin in a vacuum-assisted manner, then curing, and naturally cooling to obtain a lower panel of the resin-based composite material layer.

The invention discloses a preparation method of a three-dimensional skeleton of a heat-conducting filler, a three-dimensional skeleton and a polymer composite material. The preparation method comprises the following steps of: uniformly mixing a graphene oxide aqueous dispersion with the heat-conducting filler, adding a reducing agent and a surfactant, and uniformly stirring the mixture; and then carrying out stirring and foaming, carrying out sealed reduction on foaming liquid to obtain hydrogel, drying the hydrogel, and finally carrying out heat treatment on the dried gel. According to the preparation method, a heat-conducting filler three-dimensional porous network taking reduced graphene oxide as a skeleton is prepared through combining the water-phase surfactant foaming method with graphene oxide gelation; macromolecules are injected into the filler skeleton by virtue of a vacuum-assisted impregnation method, and finally curing is performed to obtain the corresponding high-heat-conductivity polymer composite material. The method disclosed by the invention is simple in process; the obtained composite material is internally provided with the continuous heat conduction network, and the heat conduction of the composite material is isotropic and far superior to that of a traditional randomly dispersed sample.