37results about How to "Free from contamination" patented technology

A multiple dose syringe has a first valve defining a first valve opening pressure and a second valve defining a second valve opening pressure. A storage chamber in fluid communication with the second valve stores multiple doses of a substance therein and includes an outlet for dispensing multiple doses of the stored substance therethrough. A compression surface is movable between first and second positions and defines a compression chamber between the compression surface and the first valve. Movement of the compression surface in a direction from the first position toward the second position dispenses substance in the compression chamber through the first valve and out of the syringe. Movement of the compression surface in a direction from the second position toward the first position causes substance to flow from the storage chamber through the second valve and into the compression chamber.

The invention discloses a novel polyether-ether-ketone (peek) bar which is designed for solving the problems of slow crystallization speed caused by too large viscosity during processing and being too difficult to be processed caused by good metal cohesiveness after the forming by processing existing in a present PEEK bar. The invention comprises the following components according to weight proportion: 55.5 parts to 100 parts of peek resin, 2 parts to 4 parts of lubricant, 0.05 part to 0.5 part of nucleating agent and 0.05 part to 43 parts of filler. The invention also discloses the preparation method and use of the bar and has the advantages of fast molding, good processing performance and wide use.

The invention provides a micro electro mechanical system (MEMS) device and a manufacture method of the MEMS device. The device comprises a first interlayer dielectric layer, a cavity, an opening combination, an MEMS movable electrode, a second interlayer dielectric layer, a third opening and a third interlayer dielectric layer, wherein the first interlayer dielectric layer is positioned on a semiconductor substrate, the cavity is positioned in the first interlayer dielectric layer, the opening combination is positioned in the first interlayer dielectric layer arranged above the cavity, is communicated with the opening combination and comprises a first opening and a second opening, the side walls of the first opening and the second opening are not aligned, a lug boss is formed between the first opening and the second opening and is exposed out by the second opening, the MEMS movable electrode is suspended and placed in the cavity and can move relative to the cavity, the second interlayer dielectric layer is positioned on the first interlayer dielectric layer, the third opening is positioned in the second interlayer dielectric layer and is communicated with the opening combination, in addition, the position of the third opening does not exceed the position of the lug boss, and the third opening is fully filled by the third interlayer dielectric layer. The obtained MEMS device can normally work, and the reliability of the MEMS device is improved.

The present application provides stable, carbene-functionalized composite materials, and methods and uses thereof. These carbene-functionalized composite materials comprise a material having a metal surface, and a carbene monolayer that is uniform, contaminant-free (metal oxide, etc), and more stable than thiol-functionalized monolayers. Uses of such carbene-functionalized composite materials include semi-conducting materials, microelectronic devices, drug delivery or sensing applications.

The invention provides a novel portable table lamp. The bottom end of a deformable bracket is fixed to a base, a lampshade is fixed to the top end of the deformable bracket, and a lamp body is arranged in the lampshade; at least one end of an opening of the lampshade is provided with a sliding chute, each sliding chute is internally provided with an electric sliding block, the electric sliding blocks are in sliding connection with the sliding chutes, and a cover body can be opened and closed along with vertical sliding of the electric sliding blocks; when the cover body is closed, a closed space is formed in the lampshade, and the electric sliding blocks are electrically connected with a switch button of the table lamp; the base is provided with a power line storage slot, one end of the cover body is hinged to the power line storage slot through a hinge, and the other end of the cover body can be clamped to a clamping piece arranged on the power line storage slot; and the power line storage slot is internally provided with an elastic spiral power line, the tail end of the elastic spiral power line is provided with a plug, the plug is used for communicating with an external power source, the base is internally provided with an electrical storage device for storing electricity, and the electrical storage device is electrically connected with the elastic spiral power line. The novel portable table lamp has the advantages of being dustproof and concise in appearance.

The invention provides a trash can cover with a sensing device, which comprises a body, a driving mechanism, a first cover body and a second cover body, wherein the body can be in support connection with the body of a trash can; an opening is arranged on the body; a combination part is formed between the periphery and the opening of the body; the driving mechanism is arranged at the combination part of the body; the sensing device of the driving mechanism transmits a signal to a circuit board; the circuit board drives a motor; the motor drives a transmission device to rotate; the first cover body and the second cover body can be opened oppositely; the first cover body can be driven by the driving mechanism so as to be pivoted at an opening position and a covering position corresponding to the body; when the first cover body is at the opening position, the second cover body is simultaneously driven to the opening position; and, when the first cover body is at the covering position, the second cover body is simultaneously driven to the covering position.

The invention provides a PS@TiO2 structured color film with a non-iridescent effect as well as a preparation method and application thereof, and the preparation method comprises: uniform particle sizeand monodisperse PS@TiO2 microspheres are firstly prepared by a soap-free liquid polymerization and mixed solvent method, the surface of the PS microspheres is coated with good sphericity degree TiO2nanoparticles with a diameter of about 8 nm uniformly, and a TiO2 shell layer having a thickness of about 10 nm is formed; the TiO2 shell layer is evenly mixed with a carbon black material to obtaina mixture, and the structured color film is obtained by spraying the mixture with a spray gun. The color of the film does not change with the change of the viewing angle, the color is stable to display and is not easy to fade; and the film has broad application prospects in the field of color display, and expands the types of amorphous photonic crystal structure color film materials. The preparation method has the advantages of simple preparation method, strong repeatability, environmental protection safety and non-toxicity; the spraying method has low requirements on a substrate and film coating environment, and is suitable for constructing the structured color film which does not change in color with the change of the viewing angle on various material surfaces, the spraying method can beused for preparing in a large area, and industrialization is easy to realize.

The invention provides a grinding device for grinding a heat transfer printing color paste. The grinding device comprises a base rack, wherein the base rack is fixedly provided with a sand mill, a control assembly and a power assembly; the power assembly comprises a motor, and the sand mill comprises a grinding barrel and a plurality of grinding media positioned in the grinding barrel. The grinding device further comprises a circulating assembly, wherein the circulating assembly comprises a circulating barrel, a circulating pump and a plurality of conduits. The discharge port of the grinding barrel is communicated with the feed port of the circulating barrel by virtue of the conduit, and the feed port of the grinding barrel and the discharge port of the circulating barrel are respectively connected with the outlet and inlet of the circulating pump. The invention further provides a grinding process utilizing the grinding device. The grinding device provided by the invention has the characteristics of simple structure, favorable heat dissipation effect, low noise, capability of continuous production, low production cost, high grinding efficiency, and high quality of grinded products.

The invention discloses a torque measuring mechanism for a spanner. The torque measuring mechanism at least comprises a measuring barrel, a fixed ring and a sleeve, wherein a spiral track is sunken into the barrel, the measuring barrel can be stressed to automatically rotate, and the exterior of the barrel displays a plurality of scales; the fixed ring is used for limiting the measuring barrel toautomatically rotate without displacement; and the sleeve is limited at the outer part of the measuring barrel and provided with a window facing the scale part. The torque measuring mechanism can assist a user in easily identifying the torque value of the adjusted spanner.

Disclosed is a pneumatic grease applicator includes a receptacle in which a retainer that forms a tubular axle selectively fit into a bearing to which grease is to be applied and a presser that defines a bore fit over the axle are movably received. The presser forms a top cavity in which a nozzle for coupling an external grease source is fixed. Grease is pneumatically supplied through the nozzle into the tubular axle and discharge through radially-extending holes defined in the axle to cover the bearing fit on the axle. An air vent is formed in the presser for pressure balance. Sealing members are provided between side wall of the receptacle and both the retainer and the presser to prevent leakage of grease.

The bar object providing device includes one bar object container with one discharge port, one elastic feeder set inside the container to push one bar object to the discharge port, and one ejecting unit, which can eject one bar object through the discharge port once it is pressed.

The invention discloses a semiconductor wafer box particle detection method. The method comprises the following steps: (1) clean silicon wafers are prepared, and the number of particles on the surface of each silicon wafer is tested by using a particle testing instrument and recorded; (2) the clean silicon wafers are put to a to-be-tested wafer box, an air source blows and sweeps the inner part of the to-be-tested wafer box through an air path with a particle filter, the air pressure is about 15 to 30 psi, and blowing and sweeping of the air source are kept for 1 min; and (3) the particle testing instrument is used for testing the data of the particles on the surface of the silicon wafer, data are recorded, before-after added values are compared, and the semiconductor-used wafer box cleanness is judged. The wafer box particle cleanness can be detected in a quick, high-efficiency and batch mode, whether the wafer box particles are clean can be tested and analyzed timely, and the semiconductor silicon wafer can be ensured not to be polluted by the wafer box particles.

The invention relates to a camera module and an unmanned vehicle. The camera module comprises: a camera; a mounting base, wherein the camera is mounted on the mounting base; a light-transmitting protective cover which is arranged on the outer side of the camera in a sleeving manner and is movably arranged on the mounting base; and a driving mechanism which is located on the inner side of the light-transmitting protective cover and used for driving the light-transmitting protective cover to vibrate relative to the camera and the mounting base. The light-transmitting protective cover is arrangedon the outer side of the camera to protect the camera from external collision and contamination of dirt such as water drops, dust and the like, so that the camera always works in a dry and clean environment, the service life of the camera is prolonged, and meanwhile, the protection grade of the camera module can also be improved. Moreover, the light-transmitting protective cover can vibrate relative to the camera or the mounting base, so that dirt accumulated on the light-transmitting protective cover is shaken off, the cleanness of the light-transmitting protective cover is recovered, and the definition of an image shot by the camera is guaranteed.

The invention relates to a footed negative pressure tea cup cover, belonging to the technical field of tea cups. The footed negative pressure tea cup cover comprises a cup cover body (1) and a cup cover decoration (2) which are tightly combined. The footed negative pressure tea cup cover is characterized in that the cup cover body (1) and the cup cover decoration (2) are combined in a detachable and separable manner; and the cup cover body (1) is made from non-toxic food ware rubber. The invention overcomes limitation that the tea cup cover is dustproof only in the prior art and realizes the effects that the cup cover body (1) can generate a negative pressure suction force when the cup cover body (1) is slightly pressed during operation and negative pressure sealing and negative pressure fragrance keeping functions are created; the cup cover body (1) is adopted, thus matching universality of a cover and a cup is created; and when the cup cover decoration (2) is picked off from the cup cover body (1), the tea cup cover can be used as a negative pressure sealed ice basin cover, and versatility of the footed negative pressure tea cup cover is created. At least six small cylinders R are arranged at the cup cover body 1 at the top of a cup cover, the concave surface K of the cup cover is not polluted when the tea cup cover is laid flat, and the tea cup cover has a self antifouling function; and the cup cover decoration (2) can be made into animal modelling and fruit modelling artwork ornaments, and the whole footed negative pressure tea cup cover is a beautiful decorative tea cup cover.

The present invention relates to a cell culture medium additive comprising a xanthan polysaccharide and a mannan polysaccharide, such as a glucomannan or a galactomannan, that supports the growth of cells in suspension, and to a cell culture medium containing the additive. More particularly, but not exclusively, the present invention relates to a cell culture medium additive that supports the formation of multicellular bodies such as spheroids, and prevents sedimentation of cells without adversely affecting the physical properties of the cell culture medium.

A method is provided to remove a thickness of a sputter target surface deformation layer to thereby achieve a reduced burn-in time during sputtering operations. The method comprises extrusion hone polishing of the target surface with a visco-elastic abrasive medium.

The inventive device for measuring mass of movable fiber band has a compression body for compressing a fiber band, a measuring channel located on the compression body for receiving the compressed fiber band, and a sensor part (13) arranged at a measuring channel for measuring of pressure that is exerted by the fiber band in the channel. The sensor part (13) comprises a scanning element (5) for recording of the pressure, and a measuring body (6) for measuring the pressure, that is in movable and distanced connection to the scanning element. The measuring body (6) is sealed relative to the measuring channel (14) to avoid the contamination of the measuring member (6).

The invention relates to the design field of a nuclear industry box, in particular to a vertical butt-type universal hot-chamber maintenance air brake, which comprises an air brake main body and a dual-cover sealing door system, wherein the air brake main body is divided into a plurality of independent subareas, and all subareas are connected with one another through an air-brake sealing door; and the bottom of one independent subarea of the air brake main body is provided with a dual-cover sealing upper door, a top plate of a hot-chamber shell is provided with a corresponding dual-cover sealing lower door, and the dual-cover sealing upper door and the dual-cover sealing lower door form the dual-cover sealing door system. Due to the adoption of the vertical butt-type universal hot-chamber maintenance air brake, rapidness in butt joint and separation of multiple hot chambers can be realized through one air brake, the connection surface of the air brake after being separated is free from being polluted; and meanwhile, the vertical butt-type universal hot-chamber maintenance air brake has the advantages of high strength, good sealing performance, convenience in transportation and the like.

The invention provides non-destructive repair waterproof paint of an external wall. A water seepage region is effectively repaired under the condition that a wall surface of the external wall is not damaged, and the waterproof and pollution-resisting performances are good. According to the technical scheme provided by the invention, the non-destructive repair waterproof paint of the external wall comprises 50 percent to 70 percent of waterborne synthetic resin, 2 percent to 10 percent of silane nanoparticle, 10 percent to 30 percent of enhancement powder, 0.3 percent to 1 percent of a de-foaming agent, 0.1 percent to 0.3 percent of a bactericide and 0.3 percent to 1 percent of a thickening agent. The non-destructive repair waterproof paint is prepared by adopting the following method: adding the waterborne synthetic resin and the silane nanoparticle into a dispersion jar and uniformly stirring; adding and mixing the enhancement powder and the de-foaming agent, and uniformly stirring; adding the bactericide and mixing, and uniformly stirring; adding the thickening agent and mixing, and uniformly stirring; filtering and packaging.

The invention relates to a handheld mobile communication terminal. The handheld mobile communication terminal comprises a mobile phone body and a supporting assembly, wherein the mobile phone body comprises a front side display surface and a back side protection surface which are oppositely arranged; a display screen is arranged on the front side display surface; a camera is arranged on the back side protection surface; the supporting assembly comprises a protective shell and two supporting arms; the protective shell is arranged on the mobile phone body in a sleeving manner, a hollowed-out groove is formed in the corner of the protective shell, the hollowed-out groove is aligned with the camera to expose the camera, and an overturning cover plate is arranged on one side of the hollowed-outgroove and is used for overturning and sealing the hollowed-out groove. According to the handheld mobile communication terminal, the rear camera is not easily contaminated by dirt and can be conveniently and obliquely supported at a better display angle.

The invention discloses an inflatable comb, comprising a comb body and a comb handle, wherein the comb body comprises a first comb body and a second comb body; the first comb body comprises a cavity made of flexible material, a hole used for inflating and deflating is arranged in the cavity, comb bristles are arranged on the exterior of the cavity, massage grains are arranged on the comb bristles, and the diameter of the massage grains is more than the diameter of the comb bristles; the second comb body is sleeved on the outside of the first comb body, a plurality of third through holes are arranged in the second comb body, the diameter of the third through holes is more than the diameter of the comb bristles and is less than the diameter of the massage grains, and the comb bristles pass through the third through holes. When air is inflated to the cavity, the comb bristles extend out of the third through holes, the comb is ready for use, when the air in the cavity is deflated, the comb bristles retract to the third through holes, and the massage grains block the third through holes, so that the comb bristles are protected from being contaminated by dust, and the inflatable comb can increase the pleasure of a user.

The invention provides a grinding device for grinding a heat transfer printing color paste. The grinding device comprises a base rack, wherein the base rack is fixedly provided with a sand mill, a control assembly and a power assembly; the power assembly comprises a motor, and the sand mill comprises a grinding barrel and a plurality of grinding media positioned in the grinding barrel. The grinding device further comprises a circulating assembly, wherein the circulating assembly comprises a circulating barrel, a circulating pump and a plurality of conduits. The discharge port of the grinding barrel is communicated with the feed port of the circulating barrel by virtue of the conduit, and the feed port of the grinding barrel and the discharge port of the circulating barrel are respectively connected with the outlet and inlet of the circulating pump. The invention further provides a grinding process utilizing the grinding device. The grinding device provided by the invention has the characteristics of simple structure, favorable heat dissipation effect, low noise, capability of continuous production, low production cost, high grinding efficiency, and high quality of grinded products.

The invention relates to a handheld mobile communication terminal. The handheld mobile communication terminal comprises a mobile phone body and a supporting assembly, wherein the mobile phone body comprises a front side display surface and a back side protection surface which are oppositely arranged; a display screen is arranged on the front side display surface; a camera is arranged on the back side protection surface; the supporting assembly comprises a protective shell and two supporting arms; the protective shell is arranged on the mobile phone body in a sleeving manner, a hollowed-out groove is formed in the corner of the protective shell, the hollowed-out groove is aligned with the camera to expose the camera, and an overturning cover plate is arranged on one side of the hollowed-outgroove and is used for overturning and sealing the hollowed-out groove. According to the handheld mobile communication terminal, the rear camera is not easily contaminated by dirt and can be conveniently and obliquely supported at a better display angle.