摘要:
A hose of low fuel permeability has a fuel permeability in a bent state with R50 not more than three times a fuel permeability in a straight state, R50 being a bent state where the hose has its longitudinal axis bent to form an arc having a diameter of 100 mm. Its low fuel permeability is achieved if the resin forming its inner wall layer has a melt viscosity falling within a certain range, which can be obtained by, for example, increasing the degree of polymerization of the resin, or grafting a specific side chain to the main chain in each molecule of the resin, or if the resin has a volume swelling degree falling within a certain range, which can be obtained by copolymerizing a monomer having fuel resistance, or blending a polymer having fuel resistance. The hose maintains its low fuel permeability even if it may be subjected to a large load of bending stress as when it is used to form a fluid conveying line.
摘要:
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.
摘要:
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.
摘要:
An cylindrical convex portion of which opposite ends are open is integrally formed onto a fuel tank made of HDPE therewith so as to inwardly extend in the fuel tank to provide an opening thereon. A press-fit portion of a filler hose connecting pipe made of PA as a tubular member is press-fitted in the cylindrical convex portion to connecting the tubular member to the fuel tank. At least one continuous annular projection is provided on the outer peripheral surface of the press-fit portion of the tubular member so as to bite into the inner peripheral surface of the cylindrical convex portion to provide continuous circumferential contact. A face of the annular projection in direction axially of one end of tubular member is formed so as to extend outwardly and inclinedly with respect to the axial direction of the tubular member form one end toward the other end thereof.
摘要:
A heat resistance resin based engaging and holding member 4 for a connector is stopped at a female member 2 of a connector, and is engaged with a male member 1 housed at one end of the female member 2 to connect the male member 1 to the female member 2. This engaging and holding member consists of a heat resistance resin having 10% or more in elongation; 4000 MPa or less in Young's modulus in flexure; 80° C. or more in glass transition temperature; and 100° C. or more in heat distortion temperature under a load of 1.85 MPa.
摘要:
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. An engaging protrusion portion is provided in the free end portion so as to protrude inwardly in the radial direction so as to be brought into engagement with the annular protrusion portion of the introduced end portion of the tubular male element in a snap action manner. The engaging protrusion portion preferably has a tapered guide surface in its inner surface.
摘要:
A hose having a corrugated metal tube as the innermost layer and an outer layer including an inner elastic layer, a reinforced layer and an outer elastic layer. A socket fitting is swaged onto the hose body at three axially spaced points. The corrugated metal tube is provided with a flattened end portion. A proximal end of the flattened end portion extends for a minimum of 10 mm. axially away (in the direction of the complete corrugations) from the swaged point which is axially most proximate to the proximal end of the flattened end portion.
摘要:
A high-pressure resistant vibration absorbing hose includes an inner surface rubber layer, a reinforcing layer formed by braiding a reinforcing yarn in an outer side thereof at a high braiding density equal to or more than 50%, and an outer surface rubber layer, and has a joint metal fitting to an axial end portion, the caulked portion is formed in an expanded shape, and a braiding angle of the reinforcing yarn is set to 55 degree±2 degree in both of a caulked portion and a main portion.
摘要:
A high-pressure resistant vibration absorbing hose has a hose body and a joint fitting. The joint fitting is attached to a swaged portion of the hose body. The hose body has an inner surface layer, a reinforcing layer, and an outer surface layer. The swaged portion is made to have an enlarged diameter relative to a main portion of the hose body in a state before the joint fitting is securely swaged thereto. The reinforcing layer has a braid or winding angle of a reinforcing wire member in a range of 53° to 57° at the main portion, and in a range of above 53° to 62° at the swaged portion.
摘要:
A female member for use with a male member of a quick connector assembly, including a first tubular portion which has a first axial bore having a first diameter, a second tubular portion which is coaxial with the first tubular portion and which has a second axial bore which has a second diameter greater than the first diameter of the first axial bore, which is adapted to hold one or more annular seal members and which cooperates with the first axial bore to receive an end portion of the male member, and a connecting portion which connects between the first and second tubular portions and which has an annular recess which opens in the second axial bore, which is located radially outwardly of the first axial bore and which prevents the annular seal member or members from being moved from the second axial bore into the first axial bore when the end portion of the male member is inserted into the female member.