61results about How to "Accurate diameter" patented technology

A resonant tunneling diode, and other one dimensional electronic, photonic structures, and electromechanical MEMS devices, are formed as a heterostructure in a nanowhisker by forming length segments of the whisker with different materials having different band gaps.

The present invention provides a tampon pledget with one or more of the following properties: increased absorbency rate; high absorbent capacity and fluid retention; rapid expansion potential; and ease of ejection of the pledget from the applicator. Surprisingly, the one or more properties are achieved by using a modified dual cross-pad, folded, compressed tampon pledget design.

Unitary, one-piece plastic molded micro-brushes are provided to remove the smear layer that remains in the root canal and access chamber after the pulp, bacteria, and related irritants have been mechanically and chemically removed from the root canal and access chamber using rotary cutting burs, files and various chemical reagents. The brushes include a handle, shaft or shank and a tapered brush section extending from the distal end of the shank. The brush section includes a plurality of bristles extending radially from a core. The bristles of the root canal brush can be formed in a reverse thread pattern. The brush section of the root canal brush has a diameter of between about 0.1 mm and about 0.2 mm at a tip end and a diameter of between about 0.5 mm and 3 mm at a coronal-most end. The brush section of the root canal brush is about 16 mm long, and has a taper of about 2% to about 12%. In the access chamber brush, the core can be formed as to be spherical, football-shaped, or tapered. The brushes are injection molded from an FDA approved resin.

A radar level gauge system for gauging the level of a filling material in a container is disclosed. The system comprises a waveguide extending towards the surface of said filling material; a transmitter for transmitting a microwave signal of a first mode of propagation in the waveguide; and a receiver for receiving the microwave signal reflected against the surface of the filling material and propagating back through the waveguide. Further, it comprises a processing circuitry for determining the filling level of the container based on the reflected microwave signal; and a transition element connecting the waveguide and the transmitter, wherein the transition element is configured to allow a part of the transmitted microwave signal to leak into a second mode of propagation. The first and second modes of propagation are within a frequency band which admits propagation of said microwave signal in the two different modes of propagation in the waveguide, wherein the receiver is arranged to receive the microwave signal in the at least two different modes of propagation.

An endodontic probe system comprises a measuring kit of a plurality of flexible rods for insertion as probes into a root canal for determining the apical aperture diameter. Each rod has a tip end with a diametrally enlarged end ball structure so that a user obtains a precise tactile sensation when passing the end ball through the apical aperture. A variety of different end ball shapes are disclosed. Measurement of the apical aperture diameter is important to determine so that the root canal may be properly and entirely cleaned without unnecessary reaming or enlarging the diameter of the apical aperture.

From a light source (51), light beams (57) are directed tangentially through the hook body (17), the hook base (27), and the bobbin case (28), onto a light receiver (53). Using the time (t) or the position of angular rotation of the hook body (17) at the impingement of the first light beam (57), the diameter of the bobbin packing on the lower thread bobbin (29) can be calculated.

A multilayered gas sensing element includes a solid electrolytic substrate. A measured gas side electrode and a reference electrode are provided on surfaces of the solid electrolytic substrate. The measured gas side electrode is provided in a measured gas chamber. An introducing hole forming layer has an introducing hole for introducing a measured gas from an ambient atmosphere into the measured gas chamber and also providing a diffusion resistance to the measured gas introduced into the measured gas chamber. In manufacturing this gas sensing element, the introducing hole is formed by performing laser irradiation applied to the introducing hole forming layer.

A transparent tube is placed in a parallel laser light beam emitted from a light projector and reaching a photoreciever, and a detection signal indicating an amount of light received corresponding to a width direction position of the parallel laser light beam is obtained from the photoreceiver. Peaks formed in the detection signal by beams reflected by an inner circumferential surface of the transparent tube and incident to the photoreceiver are detected; width direction positions of two intersection points where the peaks cross a predetermined threshold value are detected; the width direction positions of the light beam reflected by the inner circumferential surface of the transparent tube are calculated from an average value of the two intersection points; and an internal diameter of the transparent tube is measured from the width direction positions.

A feeding apparatus comprises a rotatably supported turret arm for supporting a new web roll and an old web roll, and a turret arm turning motor for rotating the turret arm, and splices a web of the new web roll to a web of the old web roll, thereby continuously supplying a web. The feeding apparatus further comprises a web roll diameter measuring distance meter, provided at a position opposed to the circumferential surface of the new web roll when the new web roll stops at a diameter measuring position, for measuring the distance to the new web roll; and a control device for determining the diameter of the new web roll in accordance with an output from the distance meter, and driving the turret arm turning motor in accordance with the determined diameter of the new web roll to move the new web roll to a splicing standby position.

A device and a method are provided to allow a user to ream a hole to an accurate final diameter as desired, and at the same time, to cold work the hole to induce a beneficial residual stress that will enhance the life of the component by retarding the onset and growth of fatigue cracks in the hole. The basic design of the device has an elongated body having a forward end portion to extend through a hole to be reamed and cold worked, a reamer section formed on the circumference of the forward end portion to enlarge the hole, and a burnishing section formed on the circumference of the elongated body adjacent to the reamer. The burnishing section is operative to upset the material around the hole, so as to result in a residual stress beneficial to the hole. The reamer section is in the form of a plurality of cutting edges extending from a tip of the elongated body, while the burnishing section is also in the form of a plurality of cutting edges adjacent to the reamer section along the elongate body. The cutting edges of the reamer sections are parallel straight cutting edges or helical cutting edges. The cutting edges of the burnishing section are configured with an orientation opposite to that of the cutting edges of the reaming section. Therefore, when the cutting edges of the burnishing section are configured with the same profile as the cutting edges of the reamer section, the burnishing section is in the form of a backward reamer section.

The present invention provides a tampon pledget with one or more of the following properties: increased absorbency rate; high absorbent capacity and fluid retention; rapid expansion potential; and ease of ejection of the pledget from the applicator. Surprisingly, the one or more properties are achieved by using a modified dual cross-pad, folded, compressed tampon pledget design.

An automated cascade impactor comprises an extension mechanism operable to couple to a plurality of impactor stages. The extension mechanism is operable to compress and separate impactor stages of the plurality of impactor stages via automation. The system provides a plurality of isolation stages operable to be automatically inserted between respective impactor stages when the impactor stages are separated by the extension mechanism. The system provides the plurality of isolation stages to be automatically compressed between impactor stages to isolate each impactor stage from at least one adjacent impactor stage. The plurality of isolation stages is operable to be automatically uncompressed and removed from between the impactor stages. The isolation stages allow automated extraction of particulate matter, cleaning and drying of interior surfaces of each impactor stage.

A feeding apparatus comprises a rotatably supported turret arm for supporting a new web roll and an old web roll, and a turret arm turning motor for rotating the turret arm, and splices a web of the new web roll to a web of the old web roll, thereby continuously supplying a web. The feeding apparatus further comprises a web roll diameter measuring distance meter, provided at a position opposed to the circumferential surface of the new web roll when the new web roll stops at a diameter measuring position, for measuring the distance to the new web roll; and a control device for determining the diameter of the new web roll in accordance with an output from the distance meter, and driving the turret arm turning motor in accordance with the determined diameter of the new web roll to move the new web roll to a splicing standby position.

When pulling and growing a single crystal from a raw material melt by the Czochralski method, a boundary between the single crystal and the raw material melt is imaged by an optical sensor, and also the weight of the single crystal is measured by a weight sensor, a diameter value of the single crystal is calculated on the basis of first measured values of the diameter of the single crystal derived from image data captured by the optical sensor and second measured values of the diameter of the single crystal derived from weight data captured by the weight sensor, and a pulling rate of the single crystal and the temperature of the raw material melt are adjusted on the basis of the calculated diameter value to thereby control the diameter of the single crystal, and thus it is possible to accurately measure the diameter of a growing single crystal.

The present invention pertains to a device and a method for measuring a via hole of a silicon wafer, wherein it is possible to precisely measure the depth of the via hole without damaging the wafer. Broadband infrared light is radiated to a silicon wafer which has a superior light transmission property, so that the depth of the via hole may be measured from the light which is reflected from each boundary surface of the wafer and the interference signal of reference light. The via hole measuring device according to the present invention includes: a light source unit for generating broadband infrared light; and an interferometer for radiating the light generated from the light source unit to a silicon wafer, so as to measure the depth of a via hole formed on the wafer according to the spectrum period of the interference signal of the light, which is reflected from the silicon wafer.

Provided are a filament winding method and a filament winding apparatus, in which, when a new bobbin is mounted on a bobbin rotation driving device, the control device is programmed to rotate the bobbin and oscillate a dancer while maintaining a state where a distal end of filament unwound through the dancer is fixed further beyond the dancer and the filament is stretched. The control device is programmed to obtain a bobbin diameter of the bobbin mounted on the bobbin rotation driving device based on a length of the dancer, an oscillation angle of the dancer, and a rotation angle of the bobbin.

An apparatus for inspecting a function of an endothelium of a blood vessel of a living being, by stopping, using an inflatable cuff wound around a forearm of the living being, a flow of blood in a blood vessel of the forearm, subsequently ending the stopping of the flow of blood, and causing an ultrasonic probe placed on a skin of an upper arm of the living being to emit, from an emission surface thereof, an ultrasonic wave toward a blood vessel under the skin, the apparatus including an elbow-portion support member which supports an elbow portion of the living being; and a hand-dorsal-portion support member which supports a dorsal portion of a hand of the living being and which cooperates with the elbow-portion support member to keep, in a space, the inflatable cuff wound around the forearm of the living being.

An objective lens for a plurality of types of optical discs is provided with a diffracting structure on at least one surface thereof. The surface includes an inner area including the optical axis and an outer area. The outer area includes at least one special annular zone. Part of a first beam (having a first wavelength for a first optical disc of lower data density) passed through the zone will be substantially in antiphase with part of the first beam passed through the inner area. The convergence angle θ of part of the first beam incident on the outermost part of the inner area measured after emerging from the objective lens and a design numerical aperture NAref of the first optical disc satisfy:1.0<sin θ / NAref<1.1.The effective NA of the objective lens for the first beam is substantially equal to the design numerical aperture NAref.

One can impart outstanding resistance against collapse under pressure to gas-filled microvesicle used as contrast agents in ultrasonic echography by using as fillers gases whose solubility in water, expressed in liter of gas by liter of water under standard conditions, divided by the square root of the molecular weight does not exceed 0.003.

One can impart outstanding resistance against collapse under pressure to gas-filled microvesicle used as contrast agents in ultrasonic echography by using as fillers gases whose solubility in water, expressed in liter of gas by liter of water under standard conditions, divided by the square root of the molecular weight does not exceed 0.003.

A system and method are described for ballizing and measuring a workpiece bore hole. In one embodiment, a ballizing unit having a distal end removably coupled to a ballizing member moves the ballizing member from a first position within the bore hole to a second position. A metrology unit having a distal end removably coupled to the ballizing member moves the ballizing member from the second position back to the first position. A sensor detects a force exerted on the ballizing member by the workpiece at a third position, which is located between the first and second positions.

One can impart outstanding resistance against collapse under pressure to gas-filled microvesicle used as contrast agents in ultrasonic echography by using as fillers gases whose solubility in water, expressed in liter of gas by liter of water under standard conditions, divided by the square root of the molecular weight does not exceed 0.003.