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 bent metal tube of high quality having a bend formed with a small radius of curvature, and not having any flattened, cracked, broken, folded, or otherwise defective wall portion, and a bending process which can make the same efficiently. The tube has along the inside corner of its bend a thickened wall portion having a thickness of 2.0 t to 1.5 t (t is the wall thickness of work), and a pair of transitory wall portions formed on both sides, respectively, of the thickened wall portion, and each having a gradually decreasing thickness approaching the wall thickness t of the work, and a length which is at least equal to 1/3 D (D is the diameter of the work), while the bend has an outer peripheral configuration which is substantially equal to that of the work.

Abstract: A fluid clutch includes a rotatably driven shaft. A closed casing is rotatably mounted on the shaft by bearings. The casing includes an oil basin chamber and a torque transfer chamber. A driving disc is rigidly mounted to the shaft and in the torque transfer chamber. An exhaust passage extends from an outer position in the torque transfer chamber to the oil basin chamber. A dam in the torque transfer chamber urges oil into the exhaust passage and to the oil basin chamber. A pump is disposed between the oil basin chamber and the torque transfer chamber and is operative to urge oil from the oil basin chamber downstream into the torque transfer chamber. A valve is operative to selectively open or close access to the pump in accordance with sensed temperature. Thus, the dam and exhaust passage urge oil from the torque transfer chamber to prevent accompanying rotation. However, the pump urges oil into the torque transfer chamber in accordance with cooling needs.

Abstract: A temperature sensitive fluid-type fan coupling device is provided. The device includes a rotating shaft having a hollow housing rotatably mounted on one end. The housing is divided into an oil basin chamber and a torque transmission chamber. A driving disc is securely mounted to the driving shaft and is disposed within the torque transmission chamber of the housing. The driving disc is substantially hollow and includes a plurality of radially aligned walls extending inwardly from outer circumferential portions thereof. A through hole extends through a central portion of a side wall of the driving disc opposite the rotating shaft. A plurality of apertures extend through the opposed side wall of the driving disc at radially outer positions thereon. Oil flow into and out of the hollow driving disc is controlled to avoid accompanying rotation during the short period of time after starting the engine.

Abstract: An improved joint for coupling flexible hoses for forming an air or oil supply system for an automobile or outdoor machines and equipment. The joint is provided with hose clamp means such as a collet which bites the outer peripheral surface of the top end of the hose inserted into the joint and a cover member for controlling the movement of the hose and at the same time, it is provided with several means for sealing the hose with respect to the joint so that the entry of water into the joint can be completely prevented and the corrosion of the joint elements and the hose within the joint can be eliminated to thereby keeping the sealing property of the joint for a long time.

Abstract: A steel product (or copper-plated steel product) with heat-resistant, corrosion-resistant plating layers which are composed of a 0.2-10 .mu.m thick nickel plating layer formed on said steel product, a Zn-Ni alloy plating layer formed on said nickel plating layer, and a chromate film formed on said Zn-Ni alloy plating layer.

Abstract: Herein disclosed is a high-pressure fuel injection tube structure comprising: an injection tube body having a joint head at its one end; and a cap collar having a through hole generally at its center and such a sectional shape as to cover the joint head of the injection tube and made of a highly strong and corrosion-resistant metal material. Also disclosed is a method of manufacturing the high-pressure fuel injection tube structure. The cap collar is formed at the circumferential edge of the through hole thereof with a raised pawl wall retained on the circumferential of the communication hole of the injection tube body. The cap collar is formed with an inward flange at the end of its outer circumference. The highly corrosion-resistant metal material is one selected from the group consisting of stainless steel, inconel, hastelloy and titanium. The injection tube body has a double tube structure composed of a thicker outer tube member of steel and a thinner inner tube member of stainless steel or inconel.

Abstract: A metal-made honeycomb carrier body is provided for carrying thereon an exhaust gas cleaning catalyst. The carrier body has been formed by superposing a planar metal band made of a metal sheet and a corrugated band made from another metal sheet one over the other in a contiguous relation and defines a number of network-patterned gas flow passages along a central axis thereof. At one of opposite axial ends of the honeycomb carrier body, one of the planar band and the corrugated band extends outwardly relative to the other band.

Abstract: Herein disclosed is a flared double-wall structure which forms one open end of a metal pipe to be connected to one end of a mating joint. The flared double-wall structure has one annular brim formed on and along the inner sheet face of the double walls and in the open end.

Abstract: A connector for connecting a pipe of small diameter in which chamber in communication with a flow bore of a cylindrical connection is are perforated axially on the side of the top end of a connector main body recessed windows are disposed to the circumferential wall of the chamber and the circumferential wall at the rear end thereof is formed as an engaging wall, the rear end of the chamber is engaged by the engaging wall and a separate receptacle member having a pair of finger walls protruded being opposed to each other in the inserting direction thereof, in which connection is made by engaging the finger wall to an annular bulged wall disposed near the connection end of a pipe incorporated to the inside of the connector main body in a state of connecting the pipe, wherein the receptacle main body 8 comprises an annular circumferential wall 7 to be attached on the outer circumferential surface at the rear part of the connector main body 1 and a pair of finger walls 5 each of a square block form being dispose

Abstract: A method of manufacturing a thick-walled small diameter pipe by repeating a process comprising a pipe extension process and a heating process on a pipe to be processed plural times, wherein a machining process on the inner circumferential surface of said pipe to be processed is performed prior to the pipe extension process in the final cycle of said process or a process near the final cycle to remove a black skin layer, cracks and puckers, providing smooth inner surface and excellent proof pressure.

Abstract: Herein disclosed is a connector for connecting a slender pipe engageably, which connector comprises: a generally cylindrical connector body having a communication hole, a radially reduced chamber leading to the communication hole, a radially enlarged chamber stepped from and leading to the reduced chamber, a notched aperture formed in the circumferential wall of the enlarged chamber, and a retaining wall formed at the rear end of the body; a seal ring member fitted in the reduced chamber; and a retainer adapted to engage with the retaining wall and having a pawl wall made engageable with an annular bulging wall, which is formed in the vicinity of the connected end of the pipe when the pipe is inserted for connection into the connector body. The retainer has a block-shaped pawl wall formed with an engagement face at its front and a diverging face in the vicinity of the rear portion of its inner face. At least one of the back face of the pawl wall and the retaining wall has a retaining portion.

Abstract: Disclosed are a welded pipe with an excellent corrosion resistance, having two plate layers on the inner surface thereof, and a method of manufacturing it. The inner surface is coated with the plate layers even on the bead part and other steel foundation-exposed parts. A first plate layer of at least one of Ni, Co and Ni- or Co-base alloys is formed on at least one surface of a steel strip, then a second plate layer made of a metal or alloy having a lower melting point than the metal or alloy of forming the first plate layer is formed over the first plate layer. The thus plated steel strip is formed into a pipe and then heat-treated to give a welded pipe having no exposed steel foundation. The welded pipe has excellent corrosion resistance and workability.

Abstract: A thin pipe connecting joint comprises: a joint body including retaining walls bent individually from the two end portions thereof, and an assembly hole extending through the axis thereof; and a pair of pipes including engagement walls formed at their end portions to be connected and adapted to be brought into abutment against each other, elastic seal ring members assembled on the individual back faces of the engagement walls, and a socket member inserted on the back of one of the elastic seal ring members and having a plurality of protruded tongue walls opened backward. When the engagement walls of the pipes are assembled in the assembly hole of the joint body, the other of the seal ring members is retained on the retaining wall at the same side, and the one of the seal ring members is pushed and held by the socket member so that the pipes are connected by retaining the tongue walls of the socket member on the retaining wall at one side of the joint body.

Abstract: A connector for coupling pipes having a small diameter includes a generally cylindrical main body 1 having a connecting end portion 2, a small-diameter chamber 3' which is larger in diameter than the bore of the end 2, and a large-diameter chamber 3. The end portion 2 and the chambers 3' and 3 are coaxially connected with one another. The large-diameter chamber 3 is surrounded by a wall having a pair of window openings 9, and a pair of resilient arms 7 each lying in one of the window openings 9 and having a radially inwardly bent pawl 5. The small-diameter chamber 3' contains seal rings 6, a bush 12 and a sleeve 13 positioned on the opposite side of the seal rings from the bush, which are all fitted about a pipe P connected in the main body 1. The large-diameter chamber 3 contains a cylindrical holding member 8 having an inner surface portion engaged with a wall portion of the pipe P, and an outer surface having a shoulder against which the pawls 5 are held.

Abstract: A device for cutting the inner circumferential surface of a thick-walled small diameter pipe comprising a setting means for inserting a core bar having a cutting blade on one end thereof into a pipe to be processed, a rotating means for rotating said pipe to be processed set by the setting means about the axis thereof relative to said core bar, a feed means for cutting the inner surface of said pipe to be processed with said cutting blade while pulling the core bar which is securedly held at the other end thereof relative to said pipe to be processed, and a control means for controlling each of said means, providing a smooth high quality inner surface having excellent proof pressure against internal pressure.

Abstract: A coupling for a resin tube is provided with a body having opposed front and rear ends. The large diameter chamber extends into the rear end and a communication hole extends into the front end. A small diameter chamber connects the communication hole and the large diameter chamber. A seal is disposed in the small diameter chamber for sealing engagement with both the body and the resin tube to be coupled. A split annular grip with an inwardly directed annular pawl also is disposed in the small diameter chamber and is dimensioned for surrounding the tube. The outer circumference of the grip is tapered to define a minor diameter adjacent its rear end. A holding member has a front end with an internal taper engaged with the grip. The rear end of the holding member is releasably engaged with the rear end of the body. The tube can easily be inserted in a forward direction through the split annular grip for engagement by the seal.

Abstract: A tube bending machine in which a tube detecting sensor detects an amount of bending a tube during the bending process and a controlling unit performs control so that the amount of bending detected by the sensor becomes a value corresponding to the program stored in a memory beforehand; thus, the second and subsequent tubes are bent accurately and efficiently by a drive command from the memory.

Abstract: A high-pressure fuel injection tube for a diesel engine, comprising: a tube body having connecting heads at its two end portions; fastening nuts assembled at the backs of the connecting heads; a pair of separate outer tubes so fitted on the outer circumference of the tube body as to be spaced from each other at a gap between the opposed end faces thereof and to move in the axial direction; seal ring members so fitted on the outer circumferences of the outer tubes in the vicinity of the outer end portions of the outer tubes as to engage with the fastening nuts respectively; and a relatively short joint cylinder fitted on the outer circumferences of the outer tubes across the inner end portions of the outer tubes. Further comprised is a seal ring member which is fitted between at least one fitted end portion of the joint cylinder and the outer circumference of the faced one of the outer tubes.

Abstract: A cylinder manufacturing process including the steps of: pressing an annular member of steel onto the outer circumference of one end of a cylindrical tube, which is made of steel and cut to a desired length in advance, and soldering it with a metal solder to form a flange wall; inserting the cylindrical tube portion into that portion of a mold, which has an internal diameter slightly larger than the external diameter of the tube; pressing the tube radially, while being set by fixing the flange wall, to increase the diameter of the tube with a plug which is made movable while being fitted therein and which has a slightly larger diameter than the internal diameter of the tube; and finishing the other end of the tube to product sizes.