178results about How to "Eliminate stress" patented technology

A multimode to low-mode optical fiber is constructed by forming a plurality of multimode optical fibers into a fiber bundle. The bundle is then selectively heated and drawn to form a bi-tapered fiber bundle having a central straight portion in which the multimode fibers are fused into a single length of fiber. During the drawing step, measures are taken to provide an aperture extending through the bi-tapered bundle, including the single straight portion of the bundle. An optical fiber having a low-mode or single-mode core is inserted through the aperture into the straight section of the bi-tapered bundle. The bi-tapered bundle and the low-mode core fiber are heated to a temperature at which cladding of the low-mode core fiber fuses to the straight portion of the bi-tapered bundle. The bi-tapered bundle is then cleaved in the straight portion to provide the multimode to low-mode optical fiber combiner. In one example, the multimode fiber bundle is formed around a metal wire before the drawing operation. After the drawing operation the wire is extracted from the bi-tapered bundle leaving the aperture in the bi-tapered bundle.

A body compatible stent is formed of multiple filaments arranged in at least two sets of oppositely directed helical windings interwoven with one another in a braided configuration. Each of the filaments is a composite including a central core and a case surrounding the core. In the more preferred version, the core is formed of a radiopaque and relatively ductile material, e.g. tantalum or platinum. The outer case is formed of a relatively resilient material, e.g. a cobalt / chromium based alloy. Favorable mechanical characteristics of the stent are determined by the case, while the core enables in vivo imaging of the stent. The composite filaments are formed by a drawn filled tubing process in which the core is inserted into a tubular case of a diameter substantially more than the intended final filament diameter. The composite filament is cold-worked in several steps to reduce its diameter, and annealed between successive cold working steps. After the final cold working step, the composite filament is formed into the desired shape and age hardened. Alternative composite filaments employ an intermediate barrier layer between the case and core, a biocompatible cover layer surrounding the case, and a radiopaque case surrounding a structural core.

A defibrillator system is disclosed including an operational state input, a user-operated information request input, and a user guidance output. The defibrillator system can be implemented as an AED, a manual defibrillator, or as a defibrillator trainer. The defibrillator system further utilizes the state and request inputs to determine a context-sensitive rescue information which is provided to the output.

A rehabilitative shoulder support comprising a supple sleeve component having a pair of elastically adjustable shoulder straps and a pair of downwardly depending elastic straps, a circumferential belt having a pair of shoulder strap circumferential belt loops, the circumferential belt loops being attached to elastically adjustable shoulder straps, the pair of downwardly depending elastic straps being permanently attached to the circumferential belt.

A burner system for heating the material product, i.e., asphalt, includes a burner kettle designed with a thicker bottom heat transfer plate, added heat transfer oil (HTO) circulation pumps, a spiral circulation ring and heat restriction rings. The spiral circulation ring spirals up the burner kettle to move the HTO around the entire circumference of the burner kettle to eliminate hotspots. An HTO pump moves cooler oil from the top of the kettle directly across the hottest part of the bottom of the kettle, i.e., across the heat transfer plate. Keeping this zone cool will eliminate heat stress of the material. Heat restriction rings direct the heat back and forth throughout the burner kettle for increased efficiency.

A lounge chair with ergonomic features. The lounge chair includes frame, a contoured seat section and an adjustable contoured back section that can be angularly biased relative to the seat section. The mechanism that permits the angular positioning between the seat and back sections includes a biasing member (such as a spring) and an actuator that can be operated with one hand, thereby promoting ease of use. A variable-position aperture formed into the back section can accommodate users of different heights. The contouring can be bowed upward to provide additional ventral or dorsal support to a user depending on whether the user lying prone or supine on the chair. In one embodiment, the lounge chair is of predominantly wooden construction, preferably from a dense hardwood.

A body compatible stent is formed of multiple filaments arranged in at least two sets of oppositely directed helical windings interwoven with one another in a braided configuration. Each of the filaments is a composite including a central core and a case surrounding the core. In the more preferred version, the core is formed of a radiopaque and relatively ductile material, e.g. tantalum or platinum. The outer case is formed of a relatively resilient material, e.g. a cobalt / chromium based alloy. Favorable mechanical characteristics of the stent are determined by the case, while the core enables in vivo imaging of the stent. The composite filaments are formed by a drawn filled tubing process in which the core is inserted into a tubular case of a diameter substantially more than the intended final filament diameter. The composite filament is cold-worked in several steps to reduce its diameter, and annealed between successive cold working steps. After the final cold working step, the composite filament is formed into the desired shape and age hardened. Alternative composite filaments employ an intermediate barrier layer between the case and core, a biocompatible cover layer surrounding the case, and a radiopaque case surrounding a structural core.

This invention is a convertible multi-diameter sleeve for optical fiber connectors to allow optical fiber cables with plug ferrules of different internal and external diameters to be pushed into the sleeve and connected with precise core alignment keeping stable conditions. The sleeve has at least one slot extending part way along the length of the sleeve.

A turbine airfoil usable in a turbine engine with a cooling system and a compliant dual wall configuration configured to enable thermal expansion between inner and outer layers while eliminating stress formation is disclosed. The compliant dual wall configuration may be formed a dual wall formed from inner and outer layers separated by a compliant structure. The compliant structure may be configured such that the outer layer may thermally expand without limitation by the inner layer. The compliant structure may be formed from a plurality of pedestals positioned generally parallel with each other. The pedestals may include a first foot attached to a first end of the pedestal and extending in a first direction aligned with the outer layer, and may include a second foot attached to a second end of the pedestal and extending in a second direction aligned with the inner layer.

The Voltage Sense Method is introduced and a number of its implementations using Voltage Sense Circuit are demonstrated to solve problems associated with the start-up of parallel switching converters, each converter having output synchronous rectifiers or more general Current Bi-directional Switches: prevention of the excessive reverse current, elimination of the excess voltage stress of the input switches and elimination of the voltage overshoot in the common output voltage. The Voltage Sense circuit added to each converter generates a Simulated Output Voltage, which predicts how would the output voltage of each particular unit rise during the start-up with enabled synchronous rectifiers if that particular unit were to operate alone. When the simulated output voltage of one converter reaches the actual common output voltage, synchronous rectifiers / CBS switches of that particular converter are all enabled so that their body-diodes, used up until that time to prevent reverse current flow, are by-passed eliminating all start-up problems. The introduced Voltage Sense Method and a number of its Voltage Sense Circuitries are also applicable to solve problems associated with the start-up of the current bi-directional converters with a battery load.

Each crawler shoe comprises a main body having an upper surface, a lower surface, and opposite lateral sides and opposite front and rear sides. Each crawler shoe further includes a mechanism on the main body for articulately and releasably connecting the crawler shoe to an adjacent crawler shoe. Each crawler shoe further includes a roller path on the upper surface of the main body and drive lugs attached to the upper surface of the main body on opposite sides of the roller path. Each crawler shoe further includes an upward extending peening portion so that when a downward force is applied to the peening portion, unrestricted metal flow at the peening portion can occur in a first horizontal direction and in a second horizontal direction greater than 45 degrees from the first horizontal direction. More particularly, the peening portion is greater than 0.1 inch tall, and, in the preferred embodiment, about 0.25 inches tall.

A turbine airfoil usable in a turbine engine with a cooling system and a compliant dual wall configuration configured to enable thermal expansion between inner and outer layers while eliminating stress formation is disclosed. The compliant dual wall configuration may be formed a dual wall formed from inner and outer layers separated by a compliant structure. The compliant structure may be configured such that the outer layer may thermally expand without limitation by the inner layer. The compliant structure may be formed from a plurality of pedestals positioned generally parallel with each other. The pedestals may include a first foot attached to a first end of the pedestal and extending in a first direction aligned with the outer layer, and may include a second foot attached to a second end of the pedestal and extending in a second direction aligned with the inner layer.

A moving object detection device has a magnetic sensor element, a permanent magnet for applying a magnetic field to the magnetic sensor element; a board on which electronic parts are mounted, a holder; and a case. The holder has an integral approximately box-shaped support part to hold the magnet and the board, and the holder is inserted into the case so that the magnetic sensor element, the permanent magnet, and the board are contained in the case. The holder and the case are fitted and fastened to each other by concave-convex-shaped elements.

The invention described herein discloses a chemical mechanical machining and surface finishing process. A conversion coating is formed on the surface of a workpiece and is removed via relative motion with a tool, thereby exposing the workpiece to further reaction with the active chemistry. Low mechanical forces are used such that the plastic deformation, shear strength, tensile strength and / or thermal degradation temperature of the workpiece are not exceeded. Since the chemical mechanical machining and surface finishing process requires little force and / or speed of contact to remove the conversion coating, the equipment's mass, complexity and cost can be significantly reduced, while simultaneously increasing machining precision and accuracy. The present invention lends itself to a very controlled rate of metal removal, and can simply surface finish the workpiece, or if desired, can surface finish the workpiece simultaneously with the shaping and / or sizing process.

The invention discloses a dewatering method used for improving the surging-resisting stability of a confined water stratum foundation pit. During dewatering designing, water pressure of the foundation pit is relieved by deepening and extending draining wells into a confined aquifer overlying acuitard, after being drained, the foundation pit is considered as a water-resisting layer, pressure weight of the confined aquifer overlying water-resisting layer is increased accordingly, the confined drawdown is reduced, and the surrounding environment can be protected. According to the dewatering method used for improving the surging-resisting stability of the confined water stratum foundation pit, the cover weight of the water-resisting layer is adjusted by relieving the micro pressure-bearing performance of the aquitard, the purposes of improving the surging-resisting stability of the foundation pit and reducing the confined water head are achieved, and the dewatering method has high application value.

This invention is an athletic protective mouthpiece and lip shield apparatus used in contact sports and is designed to attach to a helmet's chin strap. The mouthpiece, Air Channel, and Lip Shield structures are particularly designed to comfortably protect both upper and lower jaw of the athlete while removing unwanted impact stress from the front teeth (Incisors) and placing such stress to the stronger Cuspid and Molars regions of the athlete's dentures. This invention solves the problems of airflow restriction and impact stress of the front teeth from other athletic mouthpieces by removing the position of the Incisors from atop the breathing orifice to behind said orifice, whereby providing an improved larger non-condensing airway for the passing of unrestricted airflow. The apparatus is designed to pivot and operate by way of an attachment strap affixed to the Lip shield and fitted into an opening on the helmet's chin strap.

A cable element and a method of making the same, in which the cable element has a central strength member, a plurality of buffer tubes are disposed on the central strength member, each of the plurality of buffer tubes encloses at least one signal transmission element, and a layer of pressure sensitive adhesive is provided on the central strength member. The pressure sensitive adhesive is a repositionable adhesive and releasably couples the plurality of buffer tubes to the central strength member such that the plurality of buffer tubes can be coupled and uncoupled repeatedly from the central strength member.

The rotary internal combustion engine is a rotary internal combustion engine that uses the unique combination of multiple rotors on a vertical axis with piston vanes, which are intersected by horizontally oriented valve rings so that rotating rotors intersect gaps on the rotating valve rings, thus creating the intake compression and power and exhaust cycles on this internal combustion engine. The unique design allows the motor to operation as either a motor or pump. High volume of compressed air virtually eliminates the need for a storage tank. These engines are an elegant solution that fulfills the century long quest for quiet, clean, highly efficient rotary power. When available, the demand for the benefits of rotary piston power in air, surface, and marine applications, will be immediate and rewarding.

A method for reducing maintenance and increasing the effective life of an aircraft's landing gear, thereby increasing the aircraft's flight and landing cycles is provided. The present method eliminates adverse stresses and forces produced on landing gear components by the operation of a tow vehicle to tow the aircraft on the ground by providing an onboard wheel driver that is powered to drive at least one of the aircraft's nose wheels or main wheels to move the aircraft on the ground. Movement of the aircraft on the ground is controlled by the operation of the driver-powered drive wheel, eliminating the possibility of damage to landing gear components associated with tug operation.

The present invention relates to an individually customized online learning system and, more particularly, to an individually customized online learning system which, when respective learners make online connections using terminals belonging to the learners, automatically discloses learning problems on the terminals of respective learners, which instructs the learners to solve the learning problems using the terminals, which receives the learner's answers through the terminals and evaluates the students' grades, which additionally provides information regarding time taken to solve each problem, information regarding answers to respective problems, and information regarding solving of respective problems, and which can automatically adjust the level of difficulty of the automatically disclosed problems using information regarding time taken to solve each problem and to submit the answer and information regarding erroneous answers to corresponding problems, thereby disclosing problems according to the learning level of learners. Accordingly, an individually customized online learning system according to the present invention comprises: an examination server comprising a problem DB, which comprises problem information and example information subordinate to the problem information, and a learner DB, which has already registered and record-managed learner information, such that, when learner information within the learner DB is authenticated, the problem information and example information within the problem DB are output while being subordinate to the authenticated learner information; and a learner terminal, which interworks with the examination server, which connects to the examination server, inputs learner information, and performs authentication from the examination server, and which, when the authentication is successful, receives the problem information and the example information from the examination server, wherein the learner terminal outputs the problem information and the example information on the screen and, when one of pieces of the example information that are subordinate to the problem information is selected by an input device, generates selection information; the learner terminal matches the selection information so as to be subordinate to the problem information, the example information, and the learner information and transmits the same to the examination server, thereby generating examination record information; and the learner terminal connects to the examination server and enables the examination record information to be watched.

This invention is a convertible multi-diameter sleeve for optical fiber connectors to allow optical fiber cables with plug ferrules of different internal and external diameters to be pushed into the sleeve and connected with precise core alignment keeping stable conditions. The sleeve has at least one slot extending part way along the length of the sleeve.

The rotary internal combustion engine is a rotary internal combustion engine that uses the unique combination of multiple rotors on a vertical axis with piston vanes, which are intersected by horizontally oriented valve rings so that rotating rotors intersect gaps on the rotating valve rings, thus creating the intake compression and power and exhaust cycles on this internal combustion engine. The unique design allows the motor to operation as either a motor or pump. High volume of compressed air virtually eliminates the need for a storage tank. These engines are an elegant solution that fulfills the century long quest for quiet, clean, highly efficient rotary power. When available, the demand for the benefits of rotary piston power in air, surface, and marine applications, will be immediate and rewarding.

A semiconductor package includes a package-substrate, a first cavity formed on a first main surface of the package substrate, a first semiconductor chip mounted on the bottom surface of the first cavity, a first resin layer filled into the first cavity, and a thermal stress canceller member mounted on the package substrate for cancelling the thermal stress caused by the difference in the thermal expansion rates between the package substrate and mounting section including a first semiconductor chip and a first resin layer. The thermal stress canceller member may include a second cavity, a second resin layer filled into the second cavity, and a semiconductor chip.

A magnesium alloy sheet having an adequate strength and an excellent bendability is provided along with a method of manufacturing such an alloy sheet. The method comprises, rolling a magnesium alloy sheet through a reduction roll, the alloy thereof containing about 0.1-10.0 mass % of Al and about 0.1-4.0 mass % of Zn, wherein the magnesium alloy sheet has a surface temperature of about 100° C. or below at the time just before it is fed in the reduction roll, and the reduction roll has a surface temperature in the range of about 100° C. to 300° C. Particularly, when executing multipass rolling, at least the last pass is accomplished in non-preheat rolling wherein the magnesium alloy sheet and the reduction roll have specified surface temperatures, respectively.

A rail vehicle having a single frame assembly and a movable platform coupled thereto is provided. The rail vehicle indexes, i.e. advances intermittently, along railroad rails. The movable platform advances in a single direction at a generally steady speed as the rail vehicle indexes along a railroad. The platform is the floor of, or a base for, a cabin preferably having a seat, roof support, and controls for the operator. The platform rides longitudinally with the machine on rollers or slides, thus separating the operator and controls from the rest of the machine. Thus, while the rail vehicle moves in an abrupt stop-and-go manner, the platform and the operator move generally consistently in a single direction.

Exercise apparatuses, and methods of making and manufacturing same, for performing a plank exercise are provided. The apparatuses include a first support member that operates to rest against the chest / body of a user, and a second support member that is attached to, and extends away from, the first support member and may rest on a surface, such as a floor, mat, etc. The apparatuses may include one or more base components to add instability and increase the difficulty of workouts, the base components operating to rest on the surface, instead of the second support member or other component(s), when used. Since an individual, who has not developed proper form and strength, performing the plank exercise can lead to serious injuries, the apparatus / device permits the user to perform the plank exercise more easily and safely while permitting the user to employ the base components to increase the difficulty of an exercise.

A cam type infusion regulator consists of a shell 1, a supporting wheel 2 and a regulating wheel 3. The shell has a structure of a U-shaped groove, two pairs of axle holes (1a, 1c) are correspondingly drilled on the upper side and the lower side, and axial lines of the two pairs of the axle holes (1a, 1c) are parallel with each other and perpendicular with each other; the supporting wheel 2 is arranged in the axle hole 1c on the lower part of the shell; the regulating wheel 3 is arranged in the axle hole 1a on the upper part of the shell; the surface 3c of the regulating wheel has a cam shape, the distance between the surface 3c of the regulating wheel and an axle center changes in an involute mode, and the curvature change of the surface 3c of the regulating wheel meets the regulating and control requirements on the infusion speed; an infusion conduit is arranged between the regulating wheel 3 and the shell 1 and the supporting wheel 2; and during use, fingers twist the regulating wheel 3, the change of the distance between a curved surface 3c of the regulating wheel and a supporting wheel 3 on the bottom of the shell extrudes or releases the conduit, and changes the sectional area of the conduit to achieve the aim of regulating and controlling the infusion speed. Compared with the prior infusion regulator, the cam type infusion regulator has the characteristics of small size, material conservation, capability of self-assembly, improvement on the efficiency, convenient use, reliable regulation and stable speed.