50 results about "Membrane stretch" patented technology

A spill resistant container (e.g., a sippy cup) including a flow control element including a membrane defining multiple pinholes for controlling the flow of liquid through a drinking spout. The flow control element is mounted on a cover that screws onto a cup-shaped body such that the membrane is positioned between liquid stored in the cup-shaped body and the drinking spout, which is formed on the cap. The flow control element is formed from a suitable elastomeric material (e.g., soft rubber, thermoplastic elastomer, or silicone) such that the membrane stretches when subjected to a differential pressure. The pinholes are formed by puncturing the membrane using one or more pins having a substantially circular cross-section and sized such that each pinhole is closed by the surrounding elastomeric material when the pins are removed.

The invention provides a temperature-control high-speed large-strain membrane two-way stretching device and an experimental method thereof. A servo motor drives four #-shaped guide rails to move, and a membrane sample is stretched through a scissors mechanism. A high-pressure pneumatic clamp quickly clamps the sample and can realize pressure compensation. Two independent temperature control furnaces are respectively used for preheating the device and stretching the sample. A hot air circulating system can be adopted to realize rapid temperature rise of the control furnaces and also can ensure the temperature uniformity of cavities. Tension sensors are respectively mounted in two stretch directions and used for collecting stress-strain information in the membrane stretching process. The servo motor drives a ball screw so as to enable a stretch part to be switched among different stations. The temperature-control high-speed large-strain membrane two-way stretching device can realize two-way synchronous stretching, two-way asynchronous stretching, limited one-way stretching and unlimited one-way stretching, thus being a good device for simulating industrial membrane stretching processing and establishing the relationship between processing parameters and the membrane structure performance.

A baby bottle assembly including a nipple having a substantially flat membrane defining multiple pinholes for controlling the flow of liquid. The nipple is mounted on a cap that screws onto the bottle body. The nipple is formed from a suitable elastomeric material (e.g., soft rubber, thermoplastic elastomer, or silicone) such that the membrane stretches when subjected to a differential pressure. The pinholes are formed by puncturing the membrane while subjecting the membrane to radial tension, and using one or more pins having a substantially circular cross-section and sized such that each pinhole is closed by the surrounding elastomeric material when the pins are removed.

A microphone shield system captures sound in adverse conditions. The system includes a microphone positioned within an enclosure. A membrane stretched across a portion of the enclosure passes signals within a selected frequency range. The membrane may block or attenuate signals above and/or below the frequency range to pass a desired sound with little surrounding interference.

The invention discloses a sulfonated polyaryl ether ketone (SFPAEK) ion exchange membrane preparation method and application thereof in an all-vanadium redox flow battery, and relates to the field of ion exchange membrane materials. An SFPAEK ion exchange membrane can be prepared from a sulfonic acid polymer and a reinforcing material in a blending and compounding manner; in a membrane preparation process through the processes, such as a flow casting wet method, a hot-pressing dry method, an extrusion dry method, an extrusion and blow moulding dry method and a membrane stretching orientation method, inorganic nanosheets are uniformly dispersed in the basal body of cation exchange resin; a vanadium ion barrier layer is formed; the vanadium ion shuttle effect accompanying in the charging and discharging process of the all-vanadium redox flow battery can be effectively inhibited; the method is simple in process, green, environment-friendly and low in cost; in the implementation process, damage on the membrane itself does not exist; the formed membrane has better mechanical strength; and both the electrical conductivity and the swelling degree of the membrane are ensured.

The invention provides a polyethylene composition and a film thereof. The polyethylene composition contains linear low density polyethylene obtained by ethene-alpha olefin copolymerization. The polyethylene composition has weight-average molecular weight Mw of 100000-180000g/mol, a ratio of Mw/Mn is in a range of 4.0-8.5 and a ratio of Mz/Mw is in a range of 4.5-12.5. In polyethylene film preparation based on a flat membrane stretching method, the polyethylene composition has good stretching multiplying power, a high film forming rate and a good film forming ability.

The invention provides a photocuring 3D printing device and a printing method. The photocuring 3D printing device comprises a liquid tank, a liquid tank lifting mechanism, a printing platform and a printing platform lifting mechanism. The printing platform is disposed in the liquid tank, a membrane immersing mechanism is arranged at the upper end of the liquid tank and comprises a membrane stretching mechanism and an immersed membrane fixed on the membrane stretching mechanism, and the printing platform is located at the lower end of the immersed membrane. By arranging the membrane immersing mechanism, resin at the upper end of the printing platform can be oppressed for leveling through the immersed membrane immersed in the resin, the waiting time of leveling of a liquid level is greatly shortened, and the forming efficiency is improved.

The present invention provides a door system for a temporary, movable structure having a plurality of spaced apart frame members and a membrane stretched between adjacent frame members. The door system has multiple modules movable between open and closed positions. Each module has its own membrane, separate from the membranes of the structure, which is stretched taught over the surface of the module. In the open position, the modules do not obstruct the opening in the structure, and the membranes of the modules and the structure do not go slack. The membranes of both the structure and the modules are always under tension, thus being less susceptible to damage.

The invention provides an underground polyethylene geomembrane connector and a construction method thereof. The underground polyethylene geomembrane connector comprises a connector body. Grouting grooves are formed in the two sides of the connector body correspondingly. A fixing connecting part is arranged in each grouting groove, wherein the grouting groove and the fixing connecting part extend to the middle portion of the connector body from the side end of the connector body. The two side ends of the connector body are provided with openings leading to the grouting grooves, and accordinglyan impermeable membrane or a permeable membrane stretches into the openings. The fixing connecting parts fix the impermeable membrane or the permeable membrane in a winding manner, a water encountering expansion body is arranged between the inner wall of each grouting groove and the corresponding fixing connecting part, and the impermeable membrane or the permeable membrane is jacked through the water encountering expansion bodies. The underground polyethylene geomembrane connector and the construction method thereof solve the problem about how to apply a polyethylene geomembrane to underground anti-seepage treatment construction, the construction quality and efficiency are further improved, and pollution possibly caused by construction is reduced.

A device and method for treating nocturia that transmits a vibratory signal into the lumbar region of a subject. The vibratory signal couples into the subject from a flexible medium, such as a visco-elastic foam, so that the vibratory signal has a dominant frequency. The flexible medium can be a bed mattress, a chair, a recliner, as well as a seat in a vehicle. A vibratory signal source is used to generate the vibratory signal, and can be an oscillating motor. The motor can mount on a membrane stretched across a surface of the flexible medium, or can be supported and held in contact with the flexible medium while on a stand.

An educational system for visualizing sound by a student in a laboratory. The system includes a speaker powered by an audio amplifier. A function generator or a microphone controls the amplitude and frequency of pressure waves originating from the speaker. A model of the ear canal is suspended over the speaker, the model having a plastic pipe with two open ends and a membrane stretched taut over one of the open ends with constant tension. A mirror is affixed to the membrane, creating a mass-loaded membrane. A laser pointer emits light directed toward the mirror. A screen receives a light reflection pattern created by the light reflected from the minor, with the model ear canal, speaker, membrane, and mirror placed equidistant between the screen and the laser pointer. The system is adapted to demonstrate hearing sensitivity to a deaf or hearing-impaired person in an educational setting.

The invention relates to a production line and a preparation method of required elastic and breathable arc-shaped folded type composite non-woven fabric or folded type anti-lateral-leakage non-woven fabric, and surface non-woven fabric and bottom non-woven fabric or non-woven fabric strips can be composited on two surfaces or two sides of an elastic and breathable membrane in a stretching state without application of hot melt glue or stretching of the non-woven fabric and the non-woven fabric strips and the required elastic and breathable arc-shaped folded type composite non-woven fabric or the folded type anti-lateral-leakage non-woven fabric can be formed along with springback reset of the elastic and breathable membrane. The production line comprises a PLC (programmable logic controller), elastic and breathable casting die forming roller groups are arranged below an elastic polymer resin casting die head, multiple pairs of longitudinal elastic and breathable membrane stretching roller groups are horizontally distributed on one side of the elastic and breathable casting die forming roller groups in sequence, composite forming roller groups are horizontally located on one side of the elastic and breathable membrane stretching roller groups at the tail end in the multiple pairs of longitudinal elastic and breathable membrane stretching roller groups, and the roller surfaces of the composite forming roller groups are covered with round grooves and bulge points in concave-convex-point matching.

An externally supported foil with reversible camber and variable chord length is described that allows a thin foil of efficient deformed shape to generate lift equally on opposite angles of attack to a fluid flow. The foil is supported at the leading and trailing edges to ribs that are in turn connected to spanwise spars forming an external structure attachable to a body. The foil is held by leading edge hinge(s) and trailing edge elastic membrane(s) along the span or at the ribs. Membrane pretension keeps the foil taut while generating no lift when parallel to a flow. When rotated by an external mechanism to generate an angle of attack, the membrane stretches due to the differential pressures generated on the foil surface; thereby, passively increasing the chord length and camber. Rib cutouts dictate the deformed aerodynamic or hydrodynamic foil shape that then generates lift.

The invention provides a combined angle regulator for a suspension membrane hollow glass membrane stretching frame. The angle regulator is formed by combining a spring frame pin device, a dry frame corner key and a corner connector which correspond to a spring frame, a dry frame and a partition bar in the stretching frame and made of three different profiles. The spring frame pin device comprises three different pins corresponding to different channels, a dry frame pin corresponds to an inner cavity of the dry frame, a trapezoid inner cavity is formed in the pin, the root portion intersection of the pin device is provided with a boat-shaped pipe, oval holes are formed in a square tube, round holes are formed in the two side walls of the square tube, insertion arms in butt joint with the middle partition bar profile are arranged on the two sides of the connector, connected with a flange of the dry frame and in planar butt joint with the spring frame, the connection root portions of the insertion arms are vertical ribbed plates, the upper section and the lower section are connected to clamping grooves of the two pin device root portions, an oval short pipe is arranged on a transverse ribbed plate extending to the inside of the waist portion, and the two ends of the short pipe are inserted into the oval holes in the square tube, so that the three profiles obliquely cut by 45 degrees are assembled as a whole at an end corner.