Abstract: An auxiliary heater is provided for heating a fluid flowing through a pipe. The heater includes a conductor mounted in proximity to the pipe. A magnet is opposed to the conductor with a small gap therebetween. Relative rotation is generated between the conductor and the magnet. The rotation causes the conductor to be heater by slip heat generation. The heated conductor, in turn, heats the fluid in the pipe.

Abstract: An apparatus is provided for simultaneously generating a fluid flow and heating the flowing fluid. The apparatus includes a conductive material provided on at least a part of a member which is rotated. The rotatable member generates the flow of the fluid to be heated. Magnets are opposed to one side of the conductive material with a slight gap and are mounted within a casing for the rotatable member. Fluid flows through the casing and is heated due to a slip heat energy generated by rotating the conductive material relative to the magnet.

Abstract: An inspection equipment is provided by which the endodontic file is examined and judged as to if it reaches to its critical strength. When an appropriately selected endodontic file out of the endodontic files 11, 12, 13 in the kit case 1 is set at the file sample holding portion 5 in the kit case 1 and data corresponding to the endodontic file is input from the data input portion 22, the electric resistance value on the file portion of the endodontic file measured by the resistance measuring portion 20 and the resistance value on the critical strength with correspondence to the data on the file read-out from the RAM 23 are brought together and compared by the inspection unit 30. If the calculating judgement portion 25 makes a judgement to the file to reach its critical level of strength in the cumulative damage, the alarm 19 issues an alarm sound, so that an endodontist or dental assistant knows that the file is not usable any more and should be discarded.

Abstract: A common rail includes a generally cylindrical peripheral wall having a communication passage extending axially therethrough. At least one branch hole extends through the peripheral wall and is aligned perpendicular to the axis of the common rail. The intersection of the branch hole with the outer surface of the main pipe rail defines an outwardly flared pressure receiving seat for receiving the connection head portion of a branch pipe. A sleeve nipple is welded or brazed to the outer surface of the main pipe rail and surrounds the branch hole. Inner surface regions of the peripheral wall surrounding the branch hole have a compression residual stress imparted thereto. The creation of the compression residual stress may cause a portion of the inner surface of the main pipe rail surrounding the branch hole to assume a non-cylindrical configuration.

Abstract: A lapped steel tube which is improved in resistances to the repeated high-pressure fatigue and the cavitation erosion, in the vibration resistance and in the fitting properties to eliminate the clearances between its inner, outer and intermediate pipes and to lower the production cost. The lapped steel tube comprises an outer pipe, an intermediate pipe and an inner pipe. The outer pipe is made of an electroseamed pipe, the intermediate pipe is made of a duplex-wound pipe or an electroseamed pipe, and the inner pipe is made of a seamless pipe. The outer, intermediate and inner pipes are lapped by drawing them together and are integrated by soldering the individual lapped faces.

Abstract: The present invention provides a corrosion- and chipping-resistant resin coating structure for stainless steel pipes with a small diameter and thin wall. The coating structure comprises a stainless steel pipe (1) and a polyolefin or polyamide layer (4) formed on the outer surface thereof. In a preferred embodiment, the coating structure further comprises adhesive layer (2), a fluoroplastic layer (3), and a polyamide adhesive layer (5). The coating structure exhibits good resistance to corrosion with mud and chipping by splashed pebbles.

Abstract: A multi-walled steel pipe includes at least two pipe bodies of different diameters. The two pipe bodies are overlapped with one another. Either the inner surface of the outer pipe body or the outer surface of the inner pipe body is a rough surface having a roughness of 10 to 30 .mu.m. The rough surface is made by brasting, etching, or brushing or by the use of rolls. At least one of the overlapping surfaces is plated with copper to provide a brazing layer by which the overlapping surfaces are brazed together. The pipe bodies are double-walled stainless pipes, seamless stainless pipes, or electroseamed pipes.

Abstract: The present invention provides a corrosion- and chipping-resistant resin coating structure for stainless steel pipes with a small diameter and thin wall. The coating structure comprises a stainless steel pipe (1) and a polyolefin or polyamide layer (4) formed on the outer surface thereof. In a preferred embodiment, the coating structure further comprises an adhesive layer (2), a fluoroplastic layer (3), and a polyamide adhesive layer (5). The coating structure exhibits good resistance to corrosion with mud and chipping by splashed pebbles.

Abstract: A fuel injection pipe for a diesel engine which can sustain high internal pressure is provided. The inventive fuel injection pipe of a thick doublet pipe structure comprising an inner pipe and an outer pipe and having a thin inner diameter is arranged such that the inner pipe is formed out of a seam welded pipe made of a high tension steel plate and having a thickness of 0.4 to 1.5 mm and the outer pipe is formed out of a thick steel pipe made of the same material with the inner pipe or of carbon steel. Because the fuel injection pipe thus obtained allows inner facial wrinkles of the inner pipe to be suppressed to 25 .mu.m or less in depth, it can fully sustain high internal pressure of 1200 bar or more.

Abstract: A main tube provided with a channel is mounted in a fuel rail and has a peripheral wall. One or more holes extend vertically through the peripheral wall and are in communication with the channel. Each hole forms a dished seat portion having either a staircase-like cross section or an inclined surface. The enlarged portion is formed near one end of the branching connector and extends to the inclined wall toward the front end. A connection head portion is formed at the front end of the enlarged portion. The connection head portion totally conforms in cross-sectional shape with the seat portion. The head portion is brought into abutting engagement with the seat portion. The engaging portions of the abutting portions are brazed and connected together.

Abstract: A metal support for exhaust gas cleaning has a metal honeycomb core body fabricated by laying a planar sheet on a corrugated sheet and rolling the laminated sheets into a cylindrical configuration. The corrugated sheet has sinusoidal shaped portions having a wave height which is sufficient to contact the adjacent planar sheet and square wave portions which have a wave height which is insufficient to enable contact with the adjacent sheets. The square wave portions have corners which project out beyond the sinusoidal shaped portions and produce agitation and disturb the flow of gas and to induce an increase in the contact efficiency between the gas and surfaces carrying catalytic material. The planar sheet is not limited to continuously flat sheets and can include flat surfaces formed by zigzag or square wave shaped members. These members can be perforate and or made of a mesh material.

Abstract: A high-pressure piping metal tube to be exposed to a high-pressure fluid on its inner face and having an increased number of service times, and a process for manufacturing the high-pressure piping metal tube. This high-pressure piping metal tube is made of a bent metal tube having a large thickness and a small diameter, in which a compressive stress is left in the inner face thereof. The high-pressure piping metal tube manufacturing process, comprises: the step of bending a metal tube having a large thickness and a small diameter; and the step of adding a residual compressive stress to the inner face of said metal tube.

Abstract: The present invention provides a metallic support, which is superior in economy and also in various properties such as durability and exhaust gas cleaning ability to conventional metallic supports, each of which is composed, as a principal element, of a metallic honeycomb body of a honeycomb structure making use of expensive planar band(s) and/or corrugated band(s) ?sheet(s)! or conventional metallic supports, each of which is of a honeycomb structure constructed by close-packing small-diameter tubes within a metal casing.Namely, the metallic support according to the present invention for supporting thereon a cleaning catalyst for exhaust gas comprises(i) a cylindrical metal casing;(ii) a desired number of small-diameter open tubes of a desired cross-sectional shape arranged within the metal casing; and(iii) metal wires fixing the small-diameter open tubes arrayed within the metal casing.

Abstract: A connecting and fitting method is provided for metallic pipes with a small diameter. The method includes providing a piping component having a tube wall extending therefrom and defining an expanded chamber. The method further includes providing a pipe member and forming at least one circumferential discontinuity in the pipe member near one end. The end of the pipe member is then inserted through an annular sealing component and into the expanded chamber defined by the tube wall. A diameter reducing area is then formed on the tube wall at a location substantially registered with the circumferential discontinuity in the pipe member to squeeze and tightly seal the sealing component into connecting engagement with the circumferential discontinuity on the pipe member.

Abstract: A dental examination mirror is provided. The dental examination mirror includes an examination unit having a planar base wall and a side wall projecting upwardly and outwardly from the base wall. The side wall includes an edge remote from the base wall. A mirror wall is sealingly secured to the edge of the side wall and is substantially parallel to the base wall. The surface of the mirror wall facing away from the base wall are reflective to permit observation of regions in an intraoral cavity. At least portions of the mirror wall enable transmission of light. A light source and a heat source are disposed in the examination unit between the base wall and mirror wall. Light from the light source will be transmitted through at least portions of the mirror wall to illuminate at least portions of the intraoral cavity without shining light toward the eyes of the dentist or patient. The heat source in the examination unit prevents fogging of the mirror.

Abstract: A support is composed of a plurality of units which each consist of a hollow essentially cylindrical member in which a sets of parallel non-intersecting wires are strung. The units are arranged one after the other with the wires extending either parallel to each other or at different angles to one another. The cylindrical members are in some embodiments formed with crenelations over which wire wound during the stringing process. Alternatively, through-holes are used to receive portions of the wires.

Abstract: A corrugated pipe formed by electric welding of a thin-walled hoop material made of ferrite type stainless steel containing not less than 1% by weight but not more than 3% by weight of Si. A Ni-type plating may be formed to at least one surface of the pipe. The corrugated pipe is free from crystal grain growth in the vicinity of the bead area of electric welding and excellent in the mechanical strength and further has excellent corrosion resistance.

Abstract: An exhaust gas cleaning metallic honeycomb body for supporting thereon an exhaust gas cleaning catalyst is described. The body is of a honeycomb structure formed by alternately superposing two types of corrugated bands made of metal sheets one over the other in a contiguous relation and defining a number of network-patterned gas flow passages along a central axis thereof. The two types of corrugated bands comprise:(i) a first corrugated band having a triangular waveform of the structure that substantially-equilateral triangles are continuously connected in a lengthwise direction; and(ii) a second corrugated band having a substantially a sinusoidal waveform.

Abstract: The present invention provides a sanitary dental mirror for diagnosing and observing a diseased part of a mouth which can prevent an undesired foggy mirror surface. A dental mirror used for diagnosing and observing a diseased part of a patient's mouth is provided with a stem portion, a distal end portion, a mirror attached on one surface of the distal end portion, and a holding member having a concave-shaped filling canister. The dental mirror furthermore comprises a certain type of substance which is filled in the concave-shaped filling canister and stores heat generated by an absorbing reaction with moisture, a lid which has a plurality of small through-holes and opens/closes an opening portion of the concave-shaped filling canister, and a sealing film which is temporarily adhered on the outer surface of the lid.

Abstract: Described is an exhaust gas cleaning metallic substrate of the structure that three metallic honeycomb bodies are successively arranged within a metallic casing. Among the three metallic honeycomb bodies, (i) the metallic honeycomb bodies at front and rear positions have each been constructed by fixing a planar and corrugated bands as constituent members of said metallic honeycomb body at at least some of points of contact therebetween and also an outer peripheral wall of the metallic honeycomb body and an inner peripheral wall of the metallic casing at at least some of points of contact therebetween, and (ii) the metallic honeycomb body at a middle position has been constructed without fixing a planar and corrugated bands as constituent members of said metallic honeycomb body at points of contact therebetween and also an outer peripheral wall of the metallic honeycomb body and an inner peripheral wall of the metallic casing at points of contact therebetween.