Abstract: A small-diameter resin tube connecting structure used as a small-diameter tube connector is provided. The connector comprises: a main body including therein a small-diameter chamber continuous with a communication hole defined by the connecting cylindrical wall at the top end of the main body and a large-diameter chamber formed behind the small-diameter chamber; and a socket having repulsive walls each in the form of a pawl wall and formed integral with, or separately from, the outer periphery of the connector main body whereby the repulsive walls of the socket are brought into engagement with an annular bulged wall of the target resin tube. Further, a thin-wall metallic tube having an annular bulged wall is inserted into at least the connecting end of the resin tube with the metallic tube serving as a reinforcing member for the resin tube. The resin tube may have the annular bulged wall together with the metallic tube by press-working the inserted metallic tube in the axial direction.

Abstract: A connector is provided for connecting a conductive resin tube to a metal pipe. The connector includes a front end for insertion into the conductive resin tube and a rear end defining a chamber for accommodating an end of the metal pipe. A support member is disposed in the connector for supporting the front end of the resin connector. The support member has a front end that engages the inner surface of conductive resin tube and a rear end that engages the metal pipe.

Abstract: A connecting structure of an externally resin-coated small-diameter metallic pipe having an excellent corrosion-resistant property with respect to a mating member is provided. According to the present invention, a resin-uncovered portion of the metallic pipe provided for applying an end processing thereon is completely covered with a protective pipe made of a resin material so that the processed pipe can be connected with the mating member without spoiling its anti-chipping property and an anti-splashing property of the metallic pipe over the entire length thereof. With the exception of the end of the metallic pipe corresponding to the margin at least required for applying an end processing on the pipe, the pipe is covered with an extrusion-moldable thick film-like resin and is connected with a mating member by means of a clamp nut assembled to the pipe end so as to be screw-fitted with the mating member.

Abstract: There are provided a connection structure and process for connecting an eye-joint and a slender metal pipe, which is enabled by making the welding operation completely unnecessary to eliminate the working troubles and a fear of cracking or breakage, as might otherwise be caused by deteriorations in the mechanical properties in the vicinity of the connection end portion, which can use the eye-joint body and the metal pipe, as plated with a corrosion-resistance substance or coated with a resin in advance, to improve the productivity drastically thereby to ensure the connection with neither axial nor circumferential movement, and which can connect a metal pipe, if necessary, as having a diameter larger than the width of the eye-joint body.

Abstract: There are provided a connection structure and process for connecting a eye-joint and a slender metal pipe, which is enabled by making the welding operation completely unnecessary to eliminate the working troubles and a fear of cracking or breakage, as might otherwise be caused by deteriorations in the mechanical properties in the vicinity of the connection end portion, which can use the eye-joint body and the metal pipe, as plated with a corrosion-resistance substance or coated with a resin in advance, to improve the productivity drastically thereby to ensure the connection with neither axial nor circumferential movement, and which can connect a metal pipe, if necessary, as having a diameter larger than the width of the eye-joint body.

Abstract: A connector is provided for a small diameter pipe that has been formed to include an annular swelled part near the end of the pipe. The connector includes a body with a communication hole extending axially therethrough. A chamber extends axially into one end and joins the communication hole. A window is formed through portions of the connector body defining the chamber, and a pawl extends across the window. The pawl includes a central portion that projects into the chamber. The pawl is configured to engage the annular swelled part of the pipe for holding the pipe in the connector body. The connector further includes a releasing member rotatably mounted around the connector body in proximity to the pawl. Outer circumferential portions of the releasing member define a cam wall configured such that rotation of the releasing member into a selected rotational orientation will deflect the pawl outwardly to enable release of the pipe.

Abstract: A joint structure for jointing a small-diameter thin metal tube and a pressure rubber hose, comprising: a joint portion having a joint end portion of a metal tube, which is given a double wall by fitting a short inner tube therein, and having a plurality of annular comb-tooth faces formed at least in the metal tube at the double wall in the vicinity of the joint end portion; and a bottomed cylindrical socket member having its bottom wall portion retained on the side of the metal tube and caulking and fixing the overlapping portions of the metal tube and the pressure rubber being fitted on the joint portion.

Abstract: A connecting joint for connection to a plastic tube comprising: a main body having proximal and distal ends with a flow passage and chamber between the ends in communication with each other. An engaging wall extends inwardly at the distal end defining a small diameter entry into the chamber, a support provided with a guard wall and resilient arms extending from the guard wall with projection walls on the terminal ends of the resilient arms having outwardly extending inclined surfaces and inwardly extending pawl walls is located in the chamber and a collar is secured in the chamber by the engaging walls. When the tube is inserted into the chamber, one of the guard wall, an annular friction ring or a seal located in the chamber engages the tube and as the tube is withdrawn the member engaging the tube moves the outwardly extending inclined surfaces into engagement with the collar thereby urging the pawls into engagement with the tube.

Abstract: An improved method of making a cross joint between different size pipes is provided. A punch, die and a pressing machine are prepared. The punch includes a center rest for receiving a small pipe, a curved slot and a curved surface for transforming an end of the small pipe. Under the actuation of the pressing machine, the end of the small pipe is transformed into an arcuate configuration which is identical with the inside curvature of a large pipe. Simultaneously, a curved bead is formed on the small pipe remaining circumferentially equal distances from the resultant arcuate edge of the small pipe. This distance is substantially the same as the wall thickness of the large pipe. Utilizing the arcuate edge and the curved bead, the small pipe and the large pipe are welded or brazed together, resulting in a cross joint having no protrusion into the large pipe space.

Abstract: A fuel delivery rail assembly is disclosed for supplying fuel to a plurality of fuel injectors in an engine. The assembly comprises a plurality of sockets and rail tubes. Each socket is divided into an upper portion and a lower portion. In one embodiment, each rail tube is also divided into an upper portion and a lower portion. All the socket upper portions and all the rail tube upper portions are combined into an elongated upper half unit, and all the socket lower portions and all the rail tube lower portions are combined into an elongated lower half unit. The upper half unit and the lower half unit are tightly connected byu a caulking deformation of one edge relative to another, with a seal member therebetween.