578 results about "Elastic membrane" patented technology

A unit for pumping fluid, particularly blood, is provided with an enclosure that has two half-shells and an elastic membrane fixed perimetrically to the enclosure in order to divide its space into two parts. One of the half-shells is provided with valves that are located at the opening of two connecting ducts for the intake and delivery of the fluid, and the other half-shell is connected to a line of working fluid that is alternately pressurized and depressurized. The first valve is a disk-shaped sheet made of elastic material. The first valve is in a central position with a support that is fixed to the opening of the first duct for connection to the outside and is suitable to rest at its peripheral region on the support. A second valve is a sheet of elastic material located at the peripheral region of the disk at the opening of the second duct for connection to the outside which lies at the peripheral region of the opening of the first duct.

The present invention relates to a fluidic intraocular lens inserted into a capsular bag of an eye to replace a crystalline lens. The fluidic intraocular lens may be shaped by elastic membranes bonded to a support ring. The space inside the device may be filled with optically transparent fluid or gel having an index of refraction greater than the index of vitreous humor. The device may be such designed so that the focusing power of the lens can be changed by the deformation of the capsular bag, which may be subsequently controlled by a ciliary muscle.

In one aspect, an apparatus is provided for securing an electrical stimulation lead in position in a person's brain. The apparatus includes a body configured to seat within a burr hole formed in the person's skull. The apparatus also includes a central elastic membrane coupled to the body and extending across a central aperture of the body. The elastic membrane includes a number of pre-formed openings provided for purposes of securing the lead in position within the brain after implantation. Each pre-formed opening may penetrate through an entire thickness of the elastic membrane. Each pre-formed opening may be selected for insertion of the lead into the brain. Each pre-formed opening is adapted to elastically expand as the lead is inserted through the pre-formed opening and positioned in the brain and is adapted to elastically contract on the lead to secure the lead in position within the brain after implantation.

A stereoscopic display is provided. The stereoscopic display is able to control a viewing position and make a viewing angel wide. On top of a display panel, an image is provided through a plurality of pixels and is separated to a left-eye image and a right-eye image by a lenticular lens. An elastic membrane prism array controls an angle of emitted light. An elastic membrane prism array is disposed on the lenticular lens or on and under the lenticular lens. The elastic membrane prism array includes a prism body having a first chamber and a second chamber, a wall disposed between the first and second chamber, a prism plate connected to the wall, a piston adapted for moving back-and-forth and a transporting tube disposed between the piston and the prism body.

Various systems and methods are employed for lift-detection. Beam triangulation can be used, and in one embodiment, an optical lift detection module is separate from the optical tracking module. In one embodiment, a capacitive lift detection technique is used. A capacitor is built into the bottom case of the mouse. When the mouse is resting on a surface, the surface material serves as a dielectric for the capacitor, while air serves as the dielectric when the mouse is lifted. This dielectric change leads to a change in the capacitance value, leading to detection of lift. In one embodiment, a capacitor with an easily compressable material inserted between the two electrodes is used. In another embodiment, a mechanical plunger with an elastic membrane is used for lift detection. Lift detection can be tunable and/or customizable. The actual height of the life can be detected, rather than simple on-off notifications.

The invention discloses an elastic membrane-type low-frequency sound insulation metamaterial structure which comprises two frames and a silicone rubber elastic membrane arranged between the two frames. A plurality of mass blocks are pasted on one side of the silicone rubber elastic membrane, and the mass blocks are separated with one another through the frames. The elastic membrane-type low-frequency sound insulation metamaterial structure solves the problems that a traditional sound insulation material is poor in low-frequency sound insulation performance, large in thickness, heavy in mass and the like and meets the five requirements of low-frequency sound insulation, wherein the five requirements include the low-frequency sound insulation requirement for noise below 500 Hz, the broadband requirement, the requirement for low structural thickness and low weight, and the requirement of easy design processing and low processing difficulty. The elastic membrane-type low-frequency sound insulation metamaterial structure has excellent low-frequency sound insulation performance, can effectively isolate low-frequency noise ranging from 200 Hz to 500 Hz, and can be applied to various carrying tools such as planes, automobiles, trains and ships and various types of building decoration. A brand new sound insulation solution is provided for creating low-noise working and living environments.

The present invention relates to a substrate holding apparatus for holding a substrate to be polished and pressing the substrate against a polishing surface. The substrate holding apparatus comprises a top ring body for holding a substrate, an elastic pad for being brought into contact with the substrate, and a support member for supporting the elastic pad. The substrate holding apparatus further comprises a contact member mounted on a lower surface of the support member and disposed in a space formed by the elastic pad and the support member. The contact member has an elastic membrane for being brought into contact with the elastic pad. A first pressure chamber is defined in the contact member, and a second pressure chamber is defined outside of the contact member. The substrate holding apparatus further comprises a fluid source for independently supplying a fluid into, or creating a vacuum in, the first pressure chamber and the second pressure chamber.

The single integrated sensor chip for temperature, humidity and pressure is manufactured by: on substrate, processing a parallel plate as the electrode of a capacitor for humidity and three resistances as the strain resistance and thermistor; preparing one layer of polymer on the plate and resistances as the capacitor dielectric medium and the elastic membrane respectively; arranging a grid plate on former dielectric medium as another capacitor electrode; forming a voltage-measuring bridge by resistances on pressure-sensitive membrane and substrate; vacuum sealing the cavity under the pressure-sensitive film to measure absolute pressure.

A fluidic variable focal length optical lens has a sealed housing having a first fluidic chamber filled with a first fluidic medium and a second fluidic chamber filled with a second fluidic medium, the first and the second fluidic chamber being separated from each other by an elastic membrane, wherein the first and the second fluidic medium have different refractive indices, and a deformator configured to deform the membrane laterally within a pump zone, thereby laterally displacing the first fluidic medium from the pump zone to a lens zone and the second fluidic medium from the lens zone to the pump zone, so that the membrane also deforms in the lens zone and changes a focal length of the lens zone along a normal direction.

The invention discloses a fiber grating earth pressure sensor which comprises a sensor shell, a pressure transmission component and a fiber grating. The earth pressure sensor is characterized in that the pressure transmission component is of a rhombus structure, and the is positioned between a bearing-type top cover and a bottom plate, and is in contact with the bearing-type top cover and the bottom plate; clearances are arranged among the pressure transmission component and the left side and the right side of the sensor shell; a grating is pasted on a metal elastic membrane; the metal elastic membrane is arranged on a transverse diagonal line between a left angle and a right angle of the pressure transmission component; and two sides of the metal elastic membrane are fixed on the left angle and the right angle of the pressure transmission component. The earth pressure sensor provided by the invention has the characteristics of large measuring span, high accuracy and simple structure, is good for miniaturization of the integral structure.

The invention aims to solve technical problems so as to eliminate harmful influences that misalignment generates additional force, torque, vibration and the like on a to-be-tested electrical spindle in the machine tool electrical spindle reliability testing, and provides a machine tool electrical spindle reliability testing stand centering adjusting device. The machine tool electrical spindle reliability testing stand centering adjusting device comprises horizon iron, a control cabinet and a dynamometer which is used for loading simulated cutting torque on a to-be-tested electrical spindle. An input shaft of the dynamometer is in coaxial key joint with the to-be-tested electrical spindle through an elastic membrane shaft coupling. The machine tool electrical spindle reliability testing stand centering adjusting device is characterized by also comprising a rotating table, an X-Z working table, a lifting platform and a pitching working table. The machine tool electrical spindle reliability testing stand centering adjusting device can timely adjust five degree of freedom of any type of misalignment, eliminates harmful influences caused by misalignment between the to-be-tested electrical spindle and the input shaft of the dynamometer, is suitable for different types of machine tool electrical spindles and mechanical spindles and other equipment with high misalignment error requirements, and has high versatility and flexibility.

The invention provides a sample preparation device for remoulded soil with different stress ratios. The device comprises a clamping unit, an upper fixing plate, a lower fixing plate, a confining pressure cover, an elastic membrane, a force transmission element, a first water-permeable element and a second water-permeable element, wherein the clamping unit comprises an upper clamping plate and a lower clamping plate; the upper clamping plate is provided with a hole; the upper fixing plate is provided with an upper hole matched with the hole; the lower fixing plate is provided with a lower hole having the same diameter as the upper hole; the two ends of the confining pressure cover are fixed on the upper fixing plate and the lower fixing plate respectively; the two ends of the elastic membrane are fixed at the peripheries of the upper hole and the lower hole in a defining manner respectively; and an outer wall of the force transmission element is clung to the elastic membrane. According to the sample preparation device for the remoulded soil with the different stress ratios, thin mud is poured into the sample preparation device, the force transmission element applies vertical pressure on the thin mud in the elastic membrane, and water in the confining pressure cover applies lateral pressure on the thin mud in the elastic membrane, so that the different stress ratios are controlled, a soil sample is solidified, and a remolded soil test sample with the uniform water content is obtained.

The invention relates to a closure of the iris diaphragm type engaging a neck portion of a container. The closure includes a thin, flexible elastic tubular member having one end connected to a rigid mobile tubular member and the other end connected to the fixed neck portion of the container. Two male protrusions on the inner surface of the mobile rigid tubular member engage female notches on the fixed outer surface of the container neck such that when the mobile member is rotated, it causes the elastic tube to twist and fold upon itself in an iris-diaphragm fashion thereby rendering a fluid, solid and light impermeable seal at the iris. The mobile member can be rotated variably thereby reducing the matter flow through the center of the container.

A vacuum sealing device comprises a lid having a rigid rim with a lower opening for receiving a dish, an impermeable elastic membrane peripherally affixed to the rigid rim for sealing the dish, and a valve-less air evacuator formed between the elastic membrane and the dish rim. The valve-less evacuator allows air to flow out of the dish when the lid is being pressed and becomes closed when the lid is released to cause said lid to rebound to form a vacuum in the dish. The rigid rim prevents lid deformation when the lid is pressed, thus enabling the vacuum formation. To facilitate lid removal, the device has a valve-less vacuum releaser comprising a finger-receiving chamber and a section of the elastic membrane located above the chamber and connected to the rigid rim for releasing the vacuum in the dish. To prevent vacuum loss during storage in freezer or fridge, the elastic membrane is sufficiently thinned prior to being affixed to the rigid rim. In use, one places the lid on a dish, forces air out of the dish via the air evacuator between a section of the elastic membrane and the dish rim by pressing the lid, and releases the lid to cause the air evacuator to close and vacuum to form in the dish. To restore the device's capability to generate and maintain vacuum after numerous uses, the lid is exposed to a hot fluid having a temperature higher than 45° C. for a period of time.

A variable focus liquid lens includes: a lens barrel which is configured to include a first cavity to contain first and second liquids which are not mixed with each other in upper and lower portions of the first cavity, respectively; a fluid pressure driving unit which is configured to include a second cavity, a fluid pressure generating groove, and an actuator generating a fluid pressure on the second liquid so as to adjust the fluid pressure of the second liquid by using the actuator; a first transparent elastic membrane sealing an upper portion of the first cavity of the lens barrel; and a conductive transparent substrate sealing a lower portion of the second cavity of the fluid pressure driving unit. The focal length is adjusted by changing the curvatures of the surfaces of the first and second liquids and the curvature of the first transparent elastic membrane by a voltage.

A vacuum seal lid for turning existing containers including plate, bowl, pan and even cutting board into a vacuum storage container comprises a top plate having an opening, a sidewall, sealing means for preserving vacuum, and a knob adapted to be at a first position in which it is above the opening to facilitate evacuation and handling, a second position in which it is at least partly below the opening to facilitate stacking and storage and a third position between the first and second positions in which the vacuum is released. The top plate may further comprise a first plate in which the opening is located and a second plate having an elastic membrane and a smooth lower surface constituting part of the sealing means for sealing containers smaller than the lid. The sealing means also comprises a sealing membrane located below the bottom surface or on the outer surface of the sidewall for sealing containers larger than the lid. To improve the seal, the sealing membrane is separable or apart from the bottom or outer surface of the sidewall. To improve the seal further, at least part of the sealing membrane is sloped at an angle relative to a horizontal plane. The knob has a knob head, a valve opening, and a valve sealer adapted to clean the valve opening by moving the knob head to improve the reliability of the lid.

A device includes a flexible polymer membrane with compliant electrodes attached thereto. The membrane is suspended in a frame. A handle, which is displaceable in respect to the frame, is connected to the membrane. A displacement of the handle causes the electrodes on the membrane to be deformed, thereby changing their area and resistance. The change of area or resistance is measured by a capacitive or resistive sensing circuit and is used to measure the deformation and therefore the displacement of the handle.

An apparatus and method for replicating the profile of a plantar surface of a foot are provided. It has particular application in the production of footwear insoles, the apparatus comprises a pressure resistant container (2); an elastic membrane (3) sealed to an open face of the container, thereby defining a variable volume chamber within the container; means for reversibly introducing fluid (15) into the chamber; a bed of elongate rods (13) of substantially equal length, in which, in one configuration, the rods can slide freely, one relative to another, along their length; and clamping means (10) for reversibly clamping the bed of rods so that the relative sliding movement of the rods is resisted; the bed of rods being arranged, in use, outside the container so that ends of the rods abut the face of the membrane. In this way, a positive and negative mould of the surface can be formed.

The invention relates to a low voltage low power heat bubble thin film type micro-fluid drive apparatus, wherein the fluid arrangement includes a fluid channel, in which fluid fills and flow from and out from the opening of the fluid channel, a heat bubble thin film type actuator comprising heating plates arranged on the bottom of the confined fluid chamber, which is insulated from the fluid channel through elastic membrane and is filled with low-boiling point liquid.