3021 results about "Contact pressure" patented technology

A packer or plug features a main sealing element that swells after a delay long enough to get it into proper position. A sleeve eventually goes away to let the well fluids at the main sealing element to start the swelling process until contact with the surrounding tubular or the wellbore is established. Other sleeves that are disposed above and below the main sealing element preferably swell, but mainly in a longitudinal direction against the main sealing element to increase its contact pressure against the surrounding tubular or the wellbore. The longitudinally swelling members may also be covered to initiate their growth after the main sealing element has started or even completed its swelling action. The longitudinally swelling members can be constrained against radial growth to direct most or all of their swelling action longitudinally. Extrusion barriers above and below the main sealing element can optionally be used.

A suitable contact state is attained by an always stable contact pressure between a male contact and a female contact which form a tuning fork type contact. For a contacts providing a tuning fork type contact 2 that attains a contact state by inserting a male contact 4 between a pair of beams 6a and 6b provided on a female contact 6, in the connected state, male contact 4 and female contact 6 are arranged so as to maintain a state wherein the width direction of the male contact is angled relative to the direction of separation of the beams 6a and 6b.

A probing device for electrically contacting with a plurality of electrodes 3, 6 aligned on an object 1 to be tested so as to transfer electrical signal therewith, comprising: a wiring sheet being formed by aligning a plurality of contact electrodes 21, 110b, corresponding to each of said electrodes, each being planted with projecting probes 20, 110a covered with hard metal films on basis of a conductor thin film 41 formed on one surface of an insulator sheet 22 of a polyimide film by etching thereof, while extension wiring 23, 110c for electrically connecting to said each of said contact electrodes being formed on basis of a conductor thin film formed on either said one surface or the other surface opposing thereto of said insulator sheet of the polyimide film; and means for giving contacting pressure for obtaining electrical conduction between said extension wiring and said object to be tested by contacting tips of said projecting contact probe formed onto said each contact electrode through giving pressuring force between said wiring sheet and said object to be tested.

In a wire-stranded hollow tube (1), a plurality of metallic wires (8) preformed with a predetermined forming rate are twisted along a circular line into a careless hollow configuration. When twisting the metallic wires (8), the neighboring metallic elements (1a, 1a) are subjected to compression with no gap between the neighboring metallic elements (1a, 1a). This increases a contact pressure between the neighboring metallic elements (1a, 1a) to attain a good tightness with a good circularity and diametrical uniformity secured therebetween, thus preventing the wire-stranded hollow tube (1) from inadvertently collapsing. A tightness is strengthened between the neighboring metallic elements (1a, 1a) when the metallic elements (1a, 1a) of different helical pitch are used. By applying the wire-stranded hollow tube (1) to a medical guide wire, a quick torque response and a good torque transmissibility are ensured which lead to a good manipulatability with a favorable follow-on capability.

A method of applying an electrode on the end of a flexible medical device to the surface of a body structure, the method including navigating the distal end of the device to the surface by orienting the distal end and advancing the device until the tip of the device contacts the surface and the portion of the device proximal to the end prolapses. Alternatively the pressure can be monitored with a pressure sensor, and used as an input in a feed back control to maintain contact pressure within a pre-determined range.

Embodiments of the invention include a method and a device for increasing vasodilatation and / or controlling the temperature of a mammal by applying a desired vacuum pressure to the skin of the extremity of a mammal. In some cases it is also desirable to provide heat to regions of the extremity of the mammal to further dilate the veins or arteries in the patient. In some cases it is also desirable to apply a contact pressure to regions of the extremity of the mammal to improve perfusion of these regions. In one embodiment, the device includes a device that is adapted to rigidly enclose a portion of an extremity of the mammal therein so that a sub-atmospheric pressure can be applied to the mammal's extremity, which is further discussed below.

Disclosed is an esophageal catheter that is capable of simultaneously measuring impedance, hydrostatic pressure and contact pressure in an esophagus from peristaltic waves, esophageal fluid and the transit bolus in a single test episode. Circumferential impedance sensors include sensing electrodes that are oppositely disposed on the circumferential impedance sensor, and reference electrodes that are also oppositely disposed on the circumferential impedance sensor and interspersed between the sensing electrodes. Accurate impedance measurements can be made in this fashion in a transverse direction in the esophagus. A hydrostatic pressure sensor is disposed at the distal tip of the esophageal probe that has a rigid cover to protect the hydrostatic pressure sensor from contact pressures of the esophagus. In this manner, the hydrostatic pressure sensor can provide purely hydrostatic pressure data from the fluids in the esophagus. Disposed above the hydrostatic pressure sensor, at the distal end of the probe, is an optical contraction sensor that detects both hydrostatic and contact pressure, by detecting the occlusion created by a flexible membrane disposed between an optical source and an optical detector mounted longitudinally in the probe, in response to contractions at the esophagus. The output of the hydrostatic pressure sensor and the optical contraction sensor permits estimations to be made of the contact pressures created by the esophagus.

A threadless interface for a fluidic system includes a microfluidic device having an outer surface and an internal near-surface channel having a first width and disposed at a first depth relative to the outer surface, with the first width being less than about two times the first depth. A fluidic seal engages the outer surface and exerts an elevated contact pressure against at least a portion of the outer surface without substantially occluding the channel. A preferred seal includes a raised boss. A fault tolerant flow path design can accommodate misalignment between adjacent device layers without detrimentally affecting fluid flow capability. The interface may be used in a microfluidic system for performing parallel analyses such as high performance liquid chromatography.

A fixing device includes a fixing member, a pressure member, a contact member, and a heater. The fixing member is provided in a width direction of a recording medium and to heat and fuse a toner image on the recording medium. The pressure member is to press against the fixing member. The contact member is provided inside the fixing member and to contact the pressure member through the fixing member to form a nip portion between the pressure member and the fixing member. The heater includes a heating element and is to heat the contact member. The heating element of the heater is a mold member of a relatively thin plate extending in a width direction of the fixing member and includes a flat surface that faces the contact member. An image forming apparatus for forming an image includes the fixing device.

A helmet blastometer for characterizing the direction, speed, magnitude, and duration of a blast event to determine the likelihood of blast-induced traumatic brain injury (biTBI). A set of external sensors, each having one or more time of arrival (TOA) gages, is mounted at various positions on a rigid outer shell of the helmet. Each external sensor includes a first TOA gage that produces a TOA signal in response to a fast rising blast induced positive pressure change above a predetermined threshold. These positive pressure change TOA signals are received by a receiver and analyzed to determine direction, speed, and magnitude of a blast. At least one of the external sensors may also include a second TOA gauge that produces a TOA signal in response to a negative pressure change below a predetermined threshold. The positive and negative pressure change TOA signals from the same external sensor are used by the receiver processor to determine blast duration. In another embodiment, a second set of internal contact pressure sensors is connected to an inner liner of the helmet to detect contact pressure on a user's head. Preferably, the receiver processor determines that a biTBI has likely been sustained by when one or more of the blast direction, speed, magnitude and contact pressure has satisfied a predetermined biTBI threshold, upon which a biTBI warning indicator may be triggered.

A floating interface assembly provides signal paths between an integrated circuit (IC) test head and contact pads on a load board or probe card accessing an IC to be tested. Pogo pins or other contactors for contacting the contact pads are mounted on the interface assembly and linked to the test head by flexible conductors. The interface assembly is attached to the test head by springs to allow it the freedom to rotate to some extent about any axis. As the test head approaches the contact pads, alignment pins engage and orient the interface assembly so that its contactors will mate with the contact pads. As the contactors come into contact with the contact pads, the interface assembly adjusts the plane of the contactors so as to evenly distribute contact pressure over all contactor pads.

The mechanical behavior of wires subjected to axial loading and experiencing bending deformation is used to ensure effective control of the contact pressure in mechanical and / or heat removing devices, and similar structures and systems. An apparatus for taking advantage of the characteristics of wires in packaging of a device, such as a semiconductor device, is disclosed, as well as a test device for identifying the accurate contact pressure required in same. Methods for the prediction of such a behavior for pre-buckling, buckling, and post-buckling conditions in wires, carbon nanotubes (CNTs), and similar wire-grid-array (WGA) structures, for example are also disclosed.

A method of applying an electrode on the end of a flexible medical device to the surface of a body structure, the method including navigating the distal end of the device to the surface by orienting the distal end and advancing the device until the tip of the device contacts the surface and the portion of the device proximal to the end prolapses. Alternatively the pressure can be monitored with a pressure sensor, and used as an input in a feed back control to maintain contact pressure within a pre-determined range.

The configuration comprises a base board to be mounted a circuit board, with an IC receiving concave place and a resilient member receiving area, having an upper wall and a lower wall surrounding the resilient member receiving area, the upper wall provided with a first slot for contact and the lower wall provided with a second slot, a contact comprising a first contact portion on which a lead of the IC is loaded, a second contact portion coming into contact with a circuit lead of the circuit board, a contact main body communicating the first contact portion with the second contact portion, and a compressing portion protruding from the rear of the contact main body, the resilient member receiving area receiving the resilient member of integral structure, set in the resilient member receiving area, in which a plurality of contacts are implanted, wherein the compressing portion compresses the resilient member in order that a contact pressure can be obtained for the contact to the IC lead and the circuit lead by means of a restoring force of the resilient member.

An apparatus for distinguishing living body fingerprint from artificial fingerprint and a method thereof are provided. A living body recognition unit determines whether fingerprint in question is living body fingerprint or not, based on the unique color of the living body fingerprint and a change of the fingerprint color which is caused due to a change of contact pressure when the living body fingerprint is contacted with the fingerprint input window. A fingerprint recognition apparatus computes color information from the fingerprint image acquired by the color image sensor, and color change information based on the change of contact pressure, and determines whether the fingerprint in question is the living body fingerprint by determining whether or not the computed color information meets a reference color range and / or if the color change information meets a reference condition.

A method for manufacturing a hermetically sealed window assembly. A first windowpane is provided, as is a first sealing member having inner and outer edges. The inner edge is positioned against the windowpane and pressed against it with sufficient force to produce a first contact pressure along a first junction. The junction is heated to produce a first temperature. The contact pressure and temperature are maintained until a diffusion bond is formed between the member and the windowpane. A second windowpane is provided, as is a second sealing member having inner and outer edges. The inner edge is positioned against the windowpane and pressed against it with sufficient force to produce a second contact pressure along a second junction. The junction is heated to produce a second temperature. The contact pressure and temperature are maintained until a diffusion bond is formed between the member and the windowpane. A spacer assembly is positioned between the first and second windowpanes for maintaining a gap therebetween. The outer ends of the sealing members are hermetically connected to one another, whereby a hermetically sealed cavity is defined between the windowpanes.

The invention relates to a concrete fracture test system and a test method thereof, and belongs to the technical field of concrete material performance test. The system comprises a measurement system and a data acquisition and processing system; a support for supporting a concrete test piece and even cushion posts symmetrically positioned on the surrounding side of the concrete test piece are arranged on a pressure tester platform of the measurement system; and springs which extend out of the tops of the cushion posts and are higher than pressure sensors are sleeved on the cushion posts. The method comprises the following steps of: when a top plate moves relative to the platform by adopting the system, making the top plate contact the springs and then contact the pressure sensors; when the top plate is contacted with the pressure sensors, controlling the load loaded onto the concrete test piece to be continuously loaded with low loading rate till the concrete test piece cracks, destabilizes and is damaged; and meanwhile, acquiring a load signal and a crack opening displacement signal and transmitting the signals to a computer. The system and the method can acquire a fine load-displacement curve so as to calculate an accurate concrete double-K fracture parameter.

There is provided a haptic feedback actuator, a haptic feedback device and an electronic device. The haptic feedback actuator includes a support plate disposed in a lower portion of a haptic device; one or more actuators disposed on the support plate, each having one end towards a central portion of the support plate and the other end towards a corner of the support plate, and generating vibrations so as to give different types of haptic feedback according to a change in contact pressure applied to the haptic device; and one or more dividing portions, each penetrating the support plate in a thickness direction thereof and dividing the support plate into vibration areas corresponding to the respective actuators.

A touch panel display system and driving method thereof is provided. The touch panel display system includes a display device and a display circuit coupled to the display device for driving a display position of the display device. The system further includes a sensing device coupled to the display device for sensing an contact pressure, and a sensing circuit coupled to the sensing device for driving a sensing position of the sensing device. The system further includes a synchronous controller coupled to the display circuit and the sensing circuit for synchronously controlling the display circuit and the sensing circuit such that the display position and the sensing position are not overlapped and maintained beyond a predetermined distance.

An input system for compact devices such as cell phones and watches which includes alphanumeric and pointer capability, provides input rates similar to those of optimized-stylus-keyboard and thumboard systems, and is one-hand operable and compatible with full-face displays. Input is by means of an “eyes-free” pointing device (which may be a touchpad with tactile markings, an isometric sensor or an array of discrete keys) which may be mounted on the back of the unit. An optionally-displayed menu of input options embodies a gestural code: the action needed to select a symbol on the menu is the required gesture—even when the menu is not shown. Cursor control is through an absolute positional function; this permits experienced users to type by touch, relying on kinesthetic cues. The user may maintain contact with the sensor during transits between selections, in which case visual feedback (in the form of a cursor, highlighting of indicated menu features, and / or a stroke trace) is provided—which enables pre-emptive correction of errors, and quick learning. The user indicates selection with a modulation of contact pressure. Two gestural lexicons are described. One uses pointing gestures and a flat menu, and is simpler; the other uses stroke gestures and a cellular menu, and is more space-efficient.

A shaft sealing ring for a shaft comprises a sealing lip made of an elastomeric material or a PTFE compound and dimensioned as to be flaccidly bendable. The flexural elasticity is selected such that it will just be sufficient to press a sealing portion of the sealing lip into sealing engagement with the periphery of the shaft. The sealing portion of the sealing lip engages the periphery for a predetermined length. In the sealing portion, the sealing lip is provided along its circumference, at the side of the shaft, with endless, undulating return channels at least throughout this length. These channels return any medium escaping during rotation of the shaft to the space to be sealed. The return channels do not communicate with the surroundings of the shaft sealing ring. No seperate contact pressure means, such as a helical ring coil spring is required to press the sealing lip into engagement with the shaft.

A touch panel display system and driving method thereof is provided. The touch panel display system includes a display device and a display circuit coupled to the display device for driving a display position of the display device. The system further includes a sensing device coupled to the display device for sensing an contact pressure, and a sensing circuit coupled to the sensing device for driving a sensing position of the sensing device. The system further includes a synchronous controller coupled to the display circuit and the sensing circuit for synchronously controlling the display circuit and the sensing circuit such that the display position and the sensing position are not overlapped and maintained beyond a predetermined distance.

A flexible smart glove detects fine hand and finger motions while permitting the wearer to make hand gestures with dexterity. The flexible smart glove has a thickness of less than about 100 μm and incorporates capacitive micro-sensors positioned at finger joint locations. The micro-sensors are thin film devices built on substrates made of a pliable material such as polyimide. Interdigitated serpentine capacitors monitor strain in the back of the hand, while parallel plate capacitors monitor contact pressure on the palm. Thus the smart glove responds electrically to various types of hand motions. Thin film resistors responsive to changes in body temperature are also formed on the flexible substrate. Motion and temperature data is transmitted from the glove to a microprocessor via a passive RFID tag or an active wireless transmitter. An ASIC is embedded in the smart glove to relay real time sensor data to a remote processor.

A multi-rib tire tread has a plurality of circumferential spaced apart ribs in an axial direction, adjacent ribs separated by a circumferential grooves and each rib having sides extending radially outward to a radially outward contact surface. The outward contact surface of a central rib has an outwardly convex curvature in an axial direction more rounded than a tread curvature. A first lateral rib and a second lateral rib are positioned adjacent opposite sides of the central rib, each lateral rib having an outwardly convex curvature in an axial direction more rounded than a tread curvature. The convex curvature of the first and second lateral ribs are less rounded than the central rib. The radius of curvature of the center rib is within a range of 170 and 270 millimeters; the radius of curvature of the first lateral rib is within a range of 80 to 180 millimeters; and the radius of curvature of the second lateral rib is within a range of 100 to 200 millimeters.

A hydrodynamically lubricating geometry for the generally circular dynamic sealing lip of rotary seals that are employed to partition a lubricant from an environment. The dynamic sealing lip is provided for establishing compressed sealing engagement with a relatively rotatable surface, and for wedging a film of lubricating fluid into the interface between the dynamic sealing lip and the relatively rotatable surface in response to relative rotation that may occur in the clockwise or the counter-clockwise direction. A wave form incorporating an elongated dimple provides the gradual convergence, efficient impingement angle, and gradual interfacial contact pressure rise that are conducive to efficient hydrodynamic wedging. Skewed elevated contact pressure zones produced by compression edge effects provide for controlled lubricant movement within the dynamic sealing interface between the seal and the relatively rotatable surface, producing enhanced lubrication and low running torque.

A hydrodynamic torque converter includes a converter housing and a turbine wheel which is arranged in the converter housing and is rotatable with respect to the converter housing about a rotational axis of the converter. The torque converter further includes a lockup clutch for producing a torque transmission connection between the converter housing and the turbine wheel. The lockup clutch has a first friction surface arrangement held by a first friction surface carrier arrangement substantially fixed with respect to rotation relative to the converter housing, a second friction surface arrangement is held by a second friction surface carrier arrangement substantially fixed with respect to rotation relative to the turbine wheel, a contact pressing arrangement for pressing the first and the second friction surface arrangement against one another in frictional contact, and an abutment arrangement at which the first and second friction surface arrangement can be supported substantially in the direction of the axis of rotation when pressed by the contact pressure arrangement. The first friction surface carrier arrangement has a substantially annular body region connected either directly or indirectly with the converter housing and driver projections which are arranged at a distance from one another in the circumferential direction proceeding from the body region. Respective counter-driver projections at the first friction surface arrangement engage between these driver projections.