1928results about How to "Large displacement" patented technology

The invention pertains to a measurement system for measuring displacement of a moveable object relative to a base in at least a first direction of measurement, the moveable object having at least one reference part that is moveable in a plane of movement relative to the base, the actual movements of the reference part being within an area of said plane of movement that is bounded by a closed contour having a shape. The measurement system comprises a sensor head that operatively communicates with a planar element. The sensor head is mounted onto the base and the planar element being mounted onto the reference part of the moveable object or the other way around, wherein the planar element has a shape that is essentially identical to the shape of the closed contour.

The invention pertains to a measurement system for measuring displacement of a moveable object relative to a base in at least a first direction of measurement, the moveable object having at least one reference part that is moveable in a plane of movement relative to the base, the actual movements of the reference part being within an area of said plane of movement that is bounded by a closed contour having a shape. The measurement system comprises a sensor head that operatively communicates with a planar element. The sensor head is mounted onto the base and the planar element being mounted onto the reference part of the moveable object or the other way around, wherein the planar element has a shape that is essentially identical to the shape of the closed contour.

The invention discloses a light five-cylinder plunger pump. The light five-cylinder plunger pump comprises a power end assembly and a hydraulic end assembly, wherein the power end assembly is connected with the hydraulic end assembly; the cylinder spacing of the light five-cylinder plunger pump is 9in; the power end assembly comprises a crank shaft, the crank shaft comprises six crank necks and five crank throws, the crank necks and the crank throws are fixedly connected, the distance between rotating centers of the crank necks and the crank throws is 101.6 mm, and the stroke distance of the light five-cylinder plunger pump is 203.2 mm. According to the light five-cylinder plunger pump, power is increased by increasing stroke, reducing transmission ratio and improving bearing capacity, andmeanwhile, dead weight is reduced by reducing the cylinder spacing, the tooth number of a big gear and the tooth thickness of the big gear and a pinion. The light five-cylinder plunger pump meets conditions of working in the area with severe well cementing operation conditions in aspects of weight and power simultaneously, and working efficiency is increased.

The invention discloses a combination bearing type large-specification movable elbow mechanism. The combination bearing type large-specification movable elbow mechanism comprises elbows, connection heads, a pressing cover, a packing seal component and a rotating component, wherein positions between the elbows and the connection heads as wall as between the elbows are fixedly connected through thepressing cover and are sealed through the packing seal component, cavities are formed at the positions between pressing cover and the connection heads as wall as between the pressing cover and the elbows and are internally provided with the rotating component, the rotating component is used for relative rotating of the connection heads or the elbows and comprises a centripetal bearing and a thrustbearing, and the elbows and the connection heads as wall as the elbows are flexibly connected. The combination bearing type large-specification movable elbow mechanism has the beneficial effects thatthe combination bearing type large-specification movable elbow mechanism is flexible in connection, smooth in rotating, simple in structure, not limited by the pipe diameter, also not limited by theelbow structure molding method, small in volume and diversified in molding method.

An improved controlled-motion instrument is provided for grasping, holding or otherwise manipulating an object in operations such as endoscopic procedures. The instrument opens and closes jaws or other manipulation members by way of a longitudinally movable cam member, but maintains the longitudinal position of the manipulation members constant relative to the instrument's body regardless of opening and closing motion. The manipulation members thus have increased length-to-diameter ratio and column strength, and the cam provides positive lateral jaw support and stability during opening and closing. The movable cam member can also include other manipulation members thereon that work in conjunction with the longitudinally fixed manipulation members.

A micromachined ultrasonic transducer array comprising a multiplicity of cMUT cells built on a substrate. Each cMUT cell comprises a compliant support structure built on the substrate, a membrane supported over a cavity by the compliant support structure, a first electrode supported by the membrane, and a second electrode that forms a capacitor with the first electrode, the cavity being disposed between the first and second electrodes. The compliant support structure uncouples the non-membrane outer surface of each cMUT cell from the supporting substrate.

A tamper switch mechanism utilized in security interface devices such as keypad installations to render them tamper-resistant, wherein the devices are generally connected to burglar alarm and fire alarm systems. More particularly, provided is a conductive tamper switch which is installed in a security interface device, such as a keypad, which upon an unauthorized attempt to dislodge the device or keypad from a wall or surface on which it is mounted, will trigger an alarm or generate a warning signal at a monitoring site indicative that an effort at tampering with the device has been effected. Also disclosed is a method of providing the tamper switch mechanism in a security interface device, such as a keypad installation.

An ultrasonic transducer includes: a support member having an opening section; a diaphragm adapted to cover the opening section; and a piezoelectric member provided to the diaphragm and at least one of expanding and contracting in an in-plane direction in response to application of a voltage, wherein the diaphragm has a concave groove section formed to have a concave shape on a surface on an opposite side to one side exposed to the opening section, and the piezoelectric member is fixed to the diaphragm in an area outside the concave groove section, and disposed to cover the concave groove section so as to be opposed to a bottom of the concave groove section via a space.

An elongated medical clip applying device having a handle grip assembly on a proximal end thereof and an elongated channel with a pair of squeezable jaws on a distal end thereof. A push rod arrangement is included having a distal end and a proximal end. The push rod arrangement is utilized for advancing a plurality of clips in a sequential manner between the jaws. The push rod includes a multiplier extender arrangement to increase the distance of travel of the distal end of the push rod arrangement a multiple of the distance of travel of the proximal or input end of the push rod arrangement.

A liquid droplet discharging piezoelectric device 1 provided with a cavity member 11 with a built-in cavity 3; an introduction member 13 having introduction channel 5 connecting with the cavity 3; and a nozzle member 12 having nozzle channel 4 connecting with the cavity 3 on a side opposite to the channel 5. This liquid droplet discharging piezoelectric device 1 is provided with an introduction port 6, attached to the introduction member 13, capable of introducing a liquid into the cavity 3 via the introduction channel 5, and a discharge port 7, attached to the nozzle member 12, capable of discharging as droplets a liquid filled in the cavity 3 via the nozzle channel 40. Even in a case where an amount of liquid droplets is of a nanoliter (nl) order, excellent stability and reproducibility are attained, and the unit can stably be operated when attached to an apparatus.

An acceleration sensor includes first and second fixed electrodes on a substrate, and a movable electrode located above the first and second fixed electrodes, with respect to the substrate, and facing them. The movable electrode is elastically supported on the substrate by a first elastic supporting body and is movable. A mass, which is elastically supported on the substrate by a second elastic supporting body, moves in response to an acceleration in a direction perpendicular to the substrate. A linking portion links the movable electrode and the mass at a position spaced from an axis of movement of the movable electrode by a distance. Acceleration is measured based on changes in a first capacitance between the first fixed electrode and the movable electrode and a second capacitance between the second fixed electrode and the movable electrode. Thus, a highly impact resistant and highly reliable acceleration sensor is obtained.

A golf club includes a golf club head that is generally constructed as a perimeter weighted golf club head and comprises a perimeter body, a hosel, at least one truss member and a face. The truss member extends between portions of the perimeter body to tune the vibration and deflection response of the golf club head in response to a golf ball impact.

A photosensor system is provided which includes a photosensor array constituted by two-dimensionally arraying a plurality of photosensors, a driver circuit for supplying a drive signal to the photosensors, and a controller for controlling a reading operation of a subject image and a sensitivity setting. Before the start of normal reading operation of a subject image, a pre-reading operation of changing the image reading sensitivity at a plurality of stages for respective rows is executed. A row in an optimal image reading state is easily determined based on the dynamic range distribution of the lightness data of read image data or a dynamic range distribution from which an abnormal value deviating from the main change trend of lightness data is removed, and the linearly differentiated value of the dynamic range. An image reading sensitivity set for this row is set as an optimal sensitivity.

Disclosed is an oscillation device comprising: a first movable plate adapted to be oscillated about a first rotation axis; a first elastic supporting portion for oscillatively supporting the first movable plate; a supporting substrate for fixing the first elastic supporting portion; a first magnetic field generating portion arranged in a position remote from the first movable plate; a second movable plate adapted to be oscillated about a second rotation axis; and a second elastic supporting portion fixed to the first movable plate for oscillatively supporting the second movable plate, in which a first coil is provided in the first movable plate to be turned round the second movable plate, and in which a second magnetic field generating portion is provided in the second movable plate. The oscillation device is capable of: operating at a high speed with large displacement; enhancing an energy efficiency; and oscillating about two axes.

In a vehicle seat, a central support member typically consisting of wire mesh or grid and supports most of the load of the vehicle occupant via spring members, and undergoes a relatively large displacement when the occupant is seated in the seat. Thus, by detecting the displacements of various parts of the central support member, preferably peripheral parts thereof, the magnitude of the total load and distribution of the load can be evaluated both reliably and accurately. Additionally, displacement sensors for measuring such large displacements are relatively inexpensive and easy to handle. Also, such sensors would not interfere with the existing seat designs, and would not be adversely affected by the equipment of the seat such as seat heaters.

Disclosed is a method accessing one or more optical fibers in a telecommunication cable in a way that considerably reduces the risk of damaging the optical fibers. To avoid inadvertent damage caused by a cutting tool, the method includes moving optical fibers and / or micromodules away from the area on the cable that is to be cut.

A piezoelectric acoustic transducer (1) of the present invention includes a lower frame (78), a lower speaker circuit (20), an upper frame (77), an upper speaker circuit (10), and a surround (76). The upper speaker circuit (10) has a piezoelectric diaphragm (14) in which piezoelectric elements (16, 17), each having a structure that flat plate electrodes are disposed on top and bottom of a piezoelectric member, are mounted on top and bottom surfaces of a board (15). The lower speaker circuit (20) has a piezoelectric diaphragm (24) in which piezoelectric elements (26, 27), each having the same structure, are mounted on a top surface and a bottom surface of a board (25). The piezoelectric diaphragms (14, 24) are coupled to each other via coupling members (74, 75). At an application of a voltage, the piezoelectric diaphragms (14, 24) are caused to curve in directions opposite to each other. Having this structure, the piezoelectric acoustic transducer (1) has an increased displacement in a thickness direction thereof, and thereby achieving high quality sound with space-saving.

Disclosed are MEMS-based optical image scanners and methods for imaging using the same. According to one embodiment, a 3-D scanner for endoscopic imaging is provided, which includes a MEMS mirror for 1-D or 2-D lateral scanning and a MEMS lens for scanning along the optical axis to control the focal depth. The MEMS lens can be a microlens bonded to a MEMS holder. Both the MEMS holder and the MEMS mirror can be electrothermally actuated. A single-mode fiber can be used for both delivering the light to and receiving the returning light from an object being examined.

An electroactive optical device, in particular an electroactive lens, comprising an optical element (1) as well as an electroactive element (2) is described. The optical element (1) is an elastic solid, such as a gel or a polymer. The electroactive element (2) comprises a plurality of compliant electrodes (3a-3e) stacked on top of each other with an electroactive material (5) between them. The electroactive element (2) is surrounded by a rigid wall (4a, 4b), which provides two common contacts for the electrodes (3a-3e). In the absence of an applied electric voltage, the optical element (1) is in a mechanically relaxed State, which reduces undesired ageing effects. Upon application of a voltage to the electrodes (3a-3e) the optical element (2) is deformed.

A piezoelectric micromachined ultrasonic transducer (PMUT) device includes a substrate having an opening therethrough and a membrane attached to the substrate over the opening. A portion of the membrane that overlies the opening is divided into a plurality of cantilevers that are mechanically coupled so that the cantilevers resonate at a common frequency.

A force sensor for measuring force and / or torque about a single axis or multiple axes is rugged, inexpensive and can be fabricated over a wide range of sizes. The force sensor includes first and second members that are coupled to each other by an elastomeric flexure that allows at least one member to be movable with respect to the other member when a force is applied. The force sensor includes a transmitting coil or printed circuit trace and a receiving coil or printed circuit trace. In one embodiment, the transmitting and receiving coils are formed on different ones of the first and second members. In another embodiment, the transmitting and receiving coils are formed on the same member and the other member is formed as a shading plate. A signal applied to the transmitting coil induces a signal in the receiving coil that represents the force applied.

A position adjusting mechanism, a rotation-axle bearing mechanism, and a rotation-speed reduction mechanism for a flat display apparatus. The rotation-speed reduction mechanism comprises a position adjusting mechanism that includes one or more means for securely attaching a stand and a main body unit of the apparatus to one another, and a position adjusting means for adjusting the mounting position of the stand and main body unit. The rotation-axle bearing mechanism comprises a radial bearing and a thrust bearing for supporting a rotation axle between a display screen unit and the stand. The rotation-speed reduction mechanism reduces the speed of rotation between the display screen unit and the stand upon application of a rotation load exceeding a certain level.

A micromachined ultrasonic transducer array comprising a multiplicity of cMUT cells built on a substrate. Each cMUT cell comprises a compliant support structure built on the substrate, a membrane supported over a cavity by the compliant support structure, a first electrode supported by the membrane, and a second electrode that forms a capacitor with the first electrode, the cavity being disposed between the first and second electrodes. The compliant support structure uncouples the non-membrane outer surface of each cMUT cell from the supporting substrate.

There is disclosed a piezoelectric thin film having less non-uniform portion and holding satisfactory piezoelectric characteristics, a method of manufacturing the film, a piezoelectric element using the piezoelectric thin film, and an ink jet system recording head using the piezoelectric element. In the piezoelectric thin film of perovskite crystals formed on a substrate by a sol-gel process and represented by a general formula Pb(1-x)Lax(ZryTi1-y)O3 (where 0≦x<1, 0.05≦y≦1), a film thickness of the thin film is 1000 nm or more and 4000 nm or less, and a difference between a maximum value and a minimum value of y in an arbitrary portion of the thin film is 0.05 or less.