Abstract: This invention provides a wear-resistant copper-base alloy, which can not only enhance wear resistance in a high temperature range but also enhance crack resistance and machinability and which is especially suitable for forming a weld bead layer. The wear-resistant copper-base alloy is composed, by weight, of 5.0 to 20.0% nickel, 0.5 to 5.0% silicon, 3.0 to 20.0% iron, 1.0 to 15.0% chromium, 0.01 to 2.00% cobalt, 3.0 to 20.0% by weight one or more of molybdenum, tungsten and vanadium, and the balance of copper with inevitable impurities. It is preferable to contain 0.01 to 5.0% niobium carbide.

Abstract: A connecting structure including a press-fitting body 341 of a press-fitting member 34 is press-fitted into one end of a resin tube 1 to thereby form a diameter-enlarged end portion 1a at one end of the resin tube 1 and fixedly engage an axially-inner end portion of the diameter-enlarged end portion with inner circumferential surface of a base portion 271 of a connection member 27. A sealing member 71 is fitted into an annular outer circumferential groove formed in the outer circumference of the diameter-enlarged end portion. An end portion 551 of a mating member 55 is fitted onto or inserted into the diameter-enlarged end portion, so that the end portion 551 engages the outer circumference of the sealing member in a fluid-tight condition. Upon insertion or fitting of the end portion of the mating member, a second engagement portion 552 projecting radially outward from the outer circumferential surface of the end portion 551 of the mating member 55 engages arm portions 272 of the connection member.

Abstract: A process of cladding by welding includes the steps of: (1) preparing a workpiece having a cladding-scheduled portion including an exposed normal region, the exposed normal region having a normal surface including a possibility that a foreign substance portion exists, and the foreign substance portion to form a defect of cladding; (2) irradiating the exposed region of the cladding-scheduled portion of the workpiece with an high-density energy beam, the high-density energy beam capable of eliminating or decreasing the foreign substance portion, substantially without melting the exposed normal region of the cladding-scheduled portion; and (3) covering the exposed normal region of the cladding-scheduled portion of the workpiece with a clad layer.

Abstract: At one end of the hose body 55 formed by the thin cylindrical wall, and straight end portion 54 extending straightly and an annular groove 56 integrally mold-formed on an outer peripheral surface of the straight end portion 54 are provided. An connecting member 60 for connecting the one end of the hose body 55 with the mating member has a cylindrical portion 61 secured on an outer peripheral surface of the straight end portion 54 coaxially. When the straight end portion 54 onto which the cylindrical portion 61 is secured is inserted into the straight end portion 54, a first engaging element 60b extending radially outwardly from the cylindrical portion 61 engages with a second engaging element 77 protruded from the opened end portion 76 radially outwardly.

Abstract: A tube connecting structure for connecting a resin tube and a tubular mating member. The structure includes an engagement member having a cylindrical base that is attached onto the outer peripheral surface of an end portion of the resin tube and is fixed to the resin tube by a cylindrical press-fitted member. The cylindrical press-fitted member is press-fitted into the inner peripheral surface of the end portion, thereby expanding the diameter of the end portion of the resin tube and fixing the cylindrical base to the resin tube. The engagement member has a plurality of arm portions radially extending from the cylindrical base. First engagement portions, in the form of ratchets, are provided to protrude from tip end portions of the arm portions, such that the first engagement portions can be snap-engaged with a second engagement portion on the tubular mating member. The tubular mating member and the resin tube are directly connected to each other with a ring-shaped elastic seal member positioned therebetween.

Abstract: A hose connecting structure includes a hose whose central and engaging portion having a thermal flexibility resin which is molded by a blow molding method and a mating member which is inserted into the edge opening of the hose. The hose connecting structure further includes a ring-shaped sealing material and a first engaging portion which is disposed in the axial direction by a predetermined distance to the sealing material at either the edge portion of the hose or the mating member and second engaging portion which is directly or indirectly engaged with the first engaging portion at either the edge portion of the hose or the mating member. The central and the engaging portion of the hose connecting structure includes a thermal flexibility resin which is molded by a blow molding method. Therefore, the most suitable soft and hard resin for the appropriate portion can be used. When the engaging portion with the mating member and the central portion are molded integrally, the working efficiency is improved.

Abstract: A hose connecting structure includes a hose whose central and engaging portion having a thermal flexibility resin which is molded by a blow molding method and a mating member which is inserted into the edge opening of the hose. The hose connecting structure further includes a ring-shaped sealing material and a first engaging portion which is disposed in the axial direction by a predetermined distance to the sealing material at either the edge portion of the hose or the mating member and a second engaging portion which is directly or indirectly engaged with the first engaging portion at either the edge portion of the hose or the mating member. Since the central and the engaging portion of the hose connecting structure includes a thermal flexibility resin which is molded by a blow molding method, the most suitable soft and hard resin for the appropriate portion can be used. When the engaging portion with the mating member and the central portion are molded integrally, the working efficiency is improved.

Abstract: A hose with a protector comprises: a tubular-shaped hose body 10; a tubular-shaped protector 20 which is coaxially provided in the state in which it covers the outer peripheral surface of the hose body 10; a tubular-shaped engager 30 which bonds the hose body 10 and the protector 20 integrally at both edge portions thereof and which forms an inserting opening into which a nipple is inserted and bonded. By producing the hose body out of resin and producing the protector out of rubber, the present hose with a protector can obtain heat resistance and anti flame resistance which are suitable for a filler hose and which are necessary at the time of vehicle fire and also the present hose with a protector is good in sealing property with the mating pipe and good in connecting function.

Abstract: A wear-resistant copper-based alloy includes 10.0 to 30.0% by weight Ni, 2.0 to 15.0% by weight Fe, 2.0 to 15.0% by weight Co, 0.5 to 5.0% by weight Si, 1.0 to 10.0% by weight Cr, 2.0 to 15.0% by weight at least one first optional element selected from the group consisting of Mo, Ti, Zr, Nb and V, at least one second optional element selected from the group consisting of C and O, and the balance of Cu and inevitable impurities. A carbon content "X" and an oxygen content "Y" satisfy the following relationships; namely: 0.ltoreq."X".ltoreq.0.5, 0.ltoreq."Y".ltoreq.0.05, and "Y".gtoreq.(-0.8)("X")+0.04. The wear-resistant copper-based alloy enables to improve the toughness of weld bead, and to inhibit weld bead from cracking effectively in the solidifying process of a building-up operation.

Abstract: A multi-layered hose according to the present invention comprises a rubber outer layer and a resin or metal inner layer which is integrally formed at the inner periphery surface of the rubber outer layer. The thickness of the resin inner layer formed at the inner periphery surface of the edge portion is thinner than that of the resin inner layer formed at the inner periphery surface of a main portion of the hose. Therefore, when a mating pipe is inserted into the hose edge portion, the mating pipe is satisfactorily adhered to the inner surface of the hose edge portion, thereby obtaining excellent sealing.

Abstract: A hose with a protector includes a tubular-shaped hose body; a tubular-shaped protector which is coaxially provided to cover the outer peripheral surface of the hose body; a tubular-shaped engager which bonds the hose body and the protector integrally at both edge portions thereof and which forms an inserting opening into which a nipple is inserted and bonded. By producing the hose body out of resin and producing the protector out of rubber, the present hose with a protector can obtain heat resistance and anti-flame resistance which are suitable for a filler hose and which are necessary at the time of vehicle fire and also the present hose with a protector is good in sealing property with the mating pipe and good in connecting function.

Abstract: It is unnecessary to carry out the grinding process for improving the accuracy in the inner surface configurations, dimensions and the like of the hoses around the portion to be connected to a mating member. Further, the flashes, resulting from the material leakage, are inhibited from producing during the injection molding of a connecting portion following the blow molding of a hose body. Accordingly, it is possible to obviate the deflashing and finishing process and to prevent the material shrinkage from occurring.After forming a hose body 12 with a thermoplastic resin by blow molding, the hose body 12 is set in an injection molding mold 20 including an inner mold 24 and an outer mold 22, and the inner mold 24 is adhered to the opening portion of the hose body 12 by sealing means 28, 30, 40 or 42 in a fluid-proof manner.

Abstract: A multi-layered hose according to the present invention comprises a rubber outer layer and a resin or metal inner layer which is integrally formed at the inner periphery surface of the rubber outer layer. The thickness of the resin inner layer formed at the inner periphery surface of the edge portion is thinner than that of the resin inner layer formed at the inner periphery surface of a main portion of the hose. Therefore, when a mating pipe is inserted into the hose edge portion, the mating pipe is satisfactorily adhered to the inner surface of the hose edge portion, thereby obtaining excellent sealing.

Abstract: Method and apparatus for bidirectionally oscillating a spot of a laser beam incident upon a workpiece to be processed with the laser beam, wherein the laser beam generated by a laser source is reflected by a movable reflecting mirror which is bidirectionally pivoted about a first axis by an oscillating actuator, so that the reflected laser beam is incident upon the workpiece. The apparatus includes a rotary support member which supports the mirror and the oscillating actuator and which is rotatable about a second axis perpendicular to the first axis, and a rotating actuator for rotating the rotary support member about the second axis during bidirectional oscillation of the spot of the laser beam incident upon the workpiece, to thereby change an oscillating direction of the beam spot.

Abstract: A resin hose connecting structure includes a resin hose including a hose body and a connecting portion formed coaxially and integrally with an end portion of the hose body and having an inserting inner peripheral surface, and a mating member made of structural material having a tubular inserting end portion for inserting into the connecting portion of the resin hose. The tubular inserting end portion includes a ring-shaped contacting surface and an inserting outer peripheral surface. In the hose body, at least the end portion is made of hard thermoplastic resin and is molded by a blow molding method. The connecting portion is made of soft thermoplastic resin and is molded by an injection molding method.

Abstract: A method for producing a multi-layered hose by electrostatically applying a thin resin layer on the inner surface of a tubular rubber outer layer. The resin can be applied by spraying resin powder from a bar nozzle inserted into an opening of the tubular outer layer, and the applied resin can be heated by an induction or dielectric heating source placed inside the tubular outer layer. The resin can be applied only to the hose body portion and not to edge portions which are to be attached to mating pipes, or a thinner layer of resin can be applied on the edge portions than on the body portion. An intermediate layer containing dielectric material or at least one of electrically conductive and magnetic material can be formed between the tubular outer layer and resin inner layer.

Abstract: In forming a weld bead of pure copper on a ferroalloy base material by laying a powder of copper and melting the powder by a high density energy source such as laser beams, TIG arc or electron beams, the powder of copper is beforehand mixed with a powder of an auxiliary metal having a higher melting point than pure copper. In order to ensure the substantial purity in copper of the weld bead, the powder mixture should not include more than 16 wt % nickel.

Abstract: A wear-resistant copper-base alloy having superior self-lubricity includes, by weight %,Ni: 10.0 to 30.0%;Si: 0.5 to 3%;Co: 2.0 to 15.0%;at least one metal selected from the group consisting of Mo, W, Nb and V:2.0 to 15.0%; andthe balance being Cu and unavoidable impurities, and having a structure in which hard phase grains containing 5 vol% or more of silicide of at least one metal selected from the group consisting of Mo, W, Nb and V are uniformly dispersed in an amount of 10 to 60 vol% in a copper-rich matrix, to which 2.0 to 15.0% of Fe and/or 1.0 to 10.0% of Cr may be further added.

Abstract: An oscillatory mirror device having a mirror and a pair of exciting systems to exert a couple of forces to turn the mirror around an axis of oscillation in an oscillating manner.

Abstract: A copper base alloy exhibits improved wear resistance particularly at elevated temperatures, which consists essentially of, in percent by weight, 10-40% of Ni, 1-7% of Si, 0.5-5% of B, 1-20% of Cr, and the balance of Cu, wherein particles of at least one of chromium boride and chromium silicide having a size of about 0.1 to about 50 .mu.m are evenly dispersed in a copper-nickel base matrix. The alloy may further contain W, Mo or Fe and/or a high-melting carbide such as WC and TaC.