Abstract: A fuel hose including a straight insertion end portion at one axial end, an outer layer formed of an elastic body, a groove portion formed coaxially on the inner wall at an axially inward end of the insertion end portion, a thin-walled inner layer made of a resin material of low gasoline permeability and provided to a portion of the inner wall, the portion including the groove portion and extending axially inward from the groove portion, and an annular seal member fitted into the groove portion with the inner layer. The insertion end portion is configured to receive a mating pipe having an engagement protrusion protruding radially outward at an end portion under pressure such that the engagement protrusion presses the seal member fitted into the groove portion to be engaged with the groove portion in a fluid-tight condition. The outer layer is configured to be fitted with a clamp.

Abstract: A quick connector including: (a) a tubular male element having an introduced end portion which has an extreme end portion and an annular protrusion portion; and (b) a tubular female element having a first receiving portion and a second receiving portion which have respective tubular shapes configured to receive therein the annular protrusion portion and the extreme end portion of the introduced end portion of the tubular male element, respectively. The first receiving portion has an elastically-deformable tongue portion which is defined by a U-shaped slot formed through the cylindrical wall of the first receiving portion. The tongue portion extends in a circumferential direction of the tubular female element, and has a free end portion which is displaceable in a radial direction of the tubular female member.

Abstract: A metal-composite hose having a wall including an innermost metal layer and a resin layer surrounding it, in which the metal layer has at each end portion of the hose an inner surface covered with a resin layer, an elastic rubber layer, or both. A process for manufacturing a metal-composite hose includes: forming a metal layer; covering the metal layer with an elastic rubber layer, if required; and after masking a specific portion of the metal layer, forming a thermoplastic resin layer thereon by powder or spray coating. The hose is preferably a corrugated one. It has high fluid impermeability, flexibility and strength, as well as high metal-rust resistance and sealing property at both ends.

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 tank joint part has a welding member welded to the outer surface of a fuel tank and a main body formed of a material of low fuel permeability and welded or otherwise joined to the welding member. The welding member is formed of modified polyethylene, which is easily weldable or otherwise joinable to the outer surface of the fuel tank and the main body, and in which very fine particles of a layered mineral are easily dispersible. The mineral is dispersed in layers oriented substantially at right angles to the direction of any possible permeation from the tank joint part. The tank joint part ensures a low fuel permeability and a high bonding strength.

Abstract: Tube 1 is comprised with an engaging end portion 11 formed on one end thereof and an annular concave portion 1b formed on the engaging end portion at a position remote from the end surface in the axial direction; an elastic sealing member 2 is comprised with an inner tube 21, which has an outer peripheral surface to be fitted to an inner peripheral surface 13 of the tube, and an outer tube portion 22, which is provided at one end side of the inner tube portion that is bent outwardly over as to cover one end surface of the engaging end portion while covering the outer peripheral surface of the engaging end portion 11; and an elastic sealing member 2, which comprises an annular concave portion 2b formed on the inner peripheral surface of the inner tube portion and an annular protrusion 2a matching the annular concave portion 1b of the tube formed on the outer peripheral surface, is inserted into the tube.

Abstract: A tank joint part welded to the resinous outer surface of a fuel tank is formed of a resinous material such that the difference in volume swelling between materials of the tank joint part and the outer surface of the tank is 10% or less when they swell with fuel, and that the bonding strength therebetween is at least 2 MPa. The tank joint part may be comprised of a main member and a joining member if every two adjoining materials satisfy the above requirements. The main and joining members are preferably formed by two-color injection molding. The tank joint part maintains good fuel impermeability and bonding strength even after exposure to fuel.

Abstract: A quick-action connector assembly including a male member, a female member, a latching indicator member substantially fitted within the female member, a first engaging device for permitting engagement of the indicator member and the male member upon insertion of the male member into the female member, to move the indicator member with the male member, and a second engaging device for substantially inhibiting rotation of the indicator member relative to the female member, prior to the insertion of the male member into the female member, and for disengaging the indicator member and the female member from each other, to permit the rotation of the indicator member relative to the female member, on the basis of the movement of the indicator member with the male member, after an annular protrusion formed on the male member has been latched in engagement with a latching projection of at least one elastically deformable latching arm provided on the female member as a result of the insertion of the male member into th

Abstract: A connection member includes a nipple portion formed at one end and a first end face portion formed at an end part of the nipple portion. A valve cap includes a small-diameter portion; a large-diameter portion; a valve seat portion having a valve seal surface formed on an inner circumferential surface of the valve cap and located between the small-diameter portion and the large-diameter portion; and a fitting end portion fitted to the outer circumferential surface of the end part of the nipple portion. A valve body includes a bottom portion having an abutment part to abut the valve seal surface; a cylindrical open end portion extending from the bottom portion; a second end face portion formed at the open end portion in such a manner as to face the first end face portion; a first sliding portion provided on the open end portion; and a first flow path portion provided in the first sliding portion. The valve body is accommodated within the large-diameter portion in an axially slidable condition.

Abstract: A connection member includes a nipple portion formed at one end and a first end face portion formed at an end part of the nipple portion. A valve cap includes a small-diameter portion; a large-diameter portion; a valve seat portion having a valve seal surface formed on an inner circumferential surface of the valve cap and located between the small-diameter portion and the large-diameter portion; and a fitting end portion fitted to the outer circumferential surface of the end part of the nipple portion. A valve body includes a bottom portion having an abutment part to abut the valve seal surface; a cylindrical open end portion extending from the bottom portion; a second end face portion formed at the open end portion in such a manner as to face the first end face portion; a first sliding portion provided on the open end portion; and a first flow path portion provided in the first sliding portion. The valve body is accommodated within the large-diameter portion in an axially slidable condition.

Abstract: A fuel hose (10) has a straight insertion end portion (10a) at one axial end thereof and includes an outer layer (11) formed of a cylindrical elastic rubber body and having a groove portion (12) formed coaxially on the inner wall at an axially inward end of the insertion end portion (10a); a thin-walled inner layer (18) made of a resin material of low gasoline permeability and fixedly bonded to the entirety of a portion of the inner wall of the outer layer, the portion including at least the groove portion and extending axially inward from the groove portion; and an annular seal member (19) fitted tightly into the groove portion lined with the inner layer. A mating pipe (21) having an engagement protrusion (22) formed at an end portion thereof is inserted under pressure into the insertion end portion of the outer layer such that the engagement protrusion presses the seal member fitted into the groove portion to thereby be engaged with the groove portion in a fluid-tight condition.

Abstract: A cylindrical elastomeric sleeve 50 is attached to and held in a receive end portion of a tubular female member 40 made of a resin or a metal. When a tubular male member 30 is inserted, an annular projecting portion 31 of the male member 30 is engaged with an engagement inner peripheral groove 56 while a diameter of a swelling portion 53 of the elastomeric sleeve 50 is increased in a first diameter portion 41 of the female member 40. A portion between the male member 30 and the female member 40 is sealed by a seal portion 54 at the other end side of the elastomeric sleeve 50 received in a second diameter portion 43 of the female member 40.

Abstract: A metal-composite corrugated hose having a wall including a metal layer forming its innermost layer and a resin layer surrounding it. Its wall has in its corrugated portion a metal layer thickness (A) of at least 20 &mgr;m, but below 200 &mgr;m, and a resin layer thickness (B) of 80 to 5,000 &mgr;m. Each thickness of A and B has a ratio (A:B) of 1:4 to 1:50. The hose is made by a specific process in which the metal and resin layers are not corrugated simultaneously. Thus, there is a provided a metal-composite corrugated hose having high fuel impermeability, flexibility and strength, and having a reinforcing effect sufficient to protect the metal layer from any fatigue failure.

Abstract: A relatively small amount of a plasticizer having an SP value of at least 8.8 and a molecular weight of at most 550 is added to blend rubber of NBR-PVC in which NBR has an AN content of from 43 to 50% by weight. The fuel impermeability and the low-temperature flexibility of the resulting rubber composition are improved to be comparable to those of FKM, and the amount of the plasticizer and its reaction product to be released from the rubber composition in fuel is reduced. Adding a controlled amount of carbon black to the rubber composition makes the composition have favorable electroconductivity. The rubber composition is formed into hoses or electroconductive hoses of low fuel permeation.

Abstract: A corrugated or convoluted laminated tube has a wall formed by an outer resin layer formed from e.g. nylon and a thin inner layer of a THV terpolymer bonded to its inner surface. It is high in flexibility, etc., has a low fuel permeability and is not deformed by swelling with fuel.

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 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 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.