Abstract: A fuel cutoff valve is mounted on an upper wall of a fuel tank to open and close a connection conduit, so as to connect and disconnect the fuel tank with and from outside. The fuel cutoff valve of the present invention includes a casing, a cup-shaped float, a bottom plate, and a cover. Both the cover and the casing swell in the liquid fuel. The cover is made of a first resin material, which has the greater fuel swelling property than a second resin material that is applied for the casing. The cover is accordingly expanded to a greater degree than the casing. A holder unit disposed on the casing increases the supporting force against a support member of the cover with the swell of the cover. The casing is thus securely held by the cover via the holder unit and is not movable against the cover under the swelling condition of the cover.

Abstract: A check valve attached to an inner wall of a main body of a fuel tank ensures a sufficient seal of the main body from outside, without increasing the required number of parts. The check valve communicates with a fuel conduit of a fuel inlet pipe and functions to prevent liquid fuel and fuel vapor in the main body from flowing through the fuel inlet pipe and being released to the outside. The check valve is opened by a flow of fuel in the fuel inlet pipe and allows the flow of fuel to be introduced into the main body. The check valve includes a casing with a fuel outlet, a valve disc, and a fixation plate. The valve disc is movable between an open position and a closed position to open and close the fuel outlet of the casing. The fixation plate has one end inserted in an end of the casing and the other end welded to the main body. This arrangement enables the main body to be securely sealed from the outside.

Abstract: A fuel tank fueling device for feeding fuel through the fuel passage of an inlet pipe into a tank main body is provided. The fueling device is easier to manipulate when the fuel cap is opened and closed, and also has better fuel tank sealing properties against the outside air. The fueling device includes a handle provided on a casing main body, operated to open and close the fuel passage; a sealing component interposed between the casing main body and the seat surface of the fuel inlet pipe; a spring disposed so as to urge the sealing component against the seat surface; and a cam mechanism whereby the operating force of the handle in the closing direction is converted via the spring into the sealing force of the sealing component pressing against the seat surface.

Abstract: An elastic arm part is provided on an outer periphery of a cylinder part of a cap, and a projection is formed in an outer periphery of an opening part. When the cap is loosened, the arm part engages the projection and is elastically deformed and after releasing the engagement of the arm part and the projection, an engagement between a first screw part and a second screw part is released. Even if an engaging distance between a first screw part and a second screw part is short, the cap is prevented from rapidly opening, and it is possible to lengthen a time a fuel steam is slowly discharged from the opening part.

Abstract: The present invention relates to a polyamide resin composition comprising a polyamide resin, a modified ethylene copolymer, an amide-based dispersant and an electroconductive material, said composition having not more than 1011 &OHgr;·cm of an intrinsic volume resistivity and not less than 30 KJ/m2 of an Izod impact strength measured according to ASTM D256.

Abstract: A check valve 30 set in a fuel tank 10 that dispenses incoming cooler fuel over a wide area that also reduces development of the fuel vapor in a gas tank body 12 when filling the tank. The check valve 30 is attached to one end of an inlet pipe 22 for introducing a supply of fuel into the tank body 12, and includes a housing 32 with a plurality of outlets 38, a valve member 40, and a spring 50. The plurality of outlets 38 are arranged at substantially equal intervals along a circumferential direction of the housing 32. The check valve 30 is generally set in its normally closed position by the pressing force of the spring 50 in order to prevent the fuel vapor in the tank body 12 from being discharged to the atmosphere even without a cap. The flow of fuel presses open the check valve 30 and is discharged out of the plurality of outlets 38 toward a wide area in the tank body 12, so as to cool down the fuel stored in the tank body 12, thereby reducing development of the fuel vapor.

Abstract: A check valve 30 set in a fuel tank 10 that dispenses incoming cooler fuel over a wide area that also reduces development of the fuel vapor in a gas tank body 12 when filling the tank. The check valve 30 is attached to one end of an inlet pipe 22 for introducing a supply of fuel into the tank body 12, and includes a housing 32 with a plurality of outlets 38, a valve member 40, and a spring 50. The plurality of outlets 38 are arranged at substantially equal intervals along a circumferential direction of the housing 32. The check valve 30 is generally set in its normally closed position by the pressing force of the spring 50 in order to prevent the fuel vapor in the tank body 12 from being discharged to the atmosphere even without a cap. The flow of fuel presses open the check valve 30 and is discharged out of the plurality of outlets 38 toward a wide area in the tank body 12, so as to cool down the fuel stored in the tank body 12, thereby reducing development of the fuel vapor.

Abstract: A fuel cap which is to be attached to a filler neck which is open for a fuel supply has a closure which is to be fitted to the filler neck and which is made of a resin, and a shell which covers an upper part of the closure and which is made of a resin. The shell is formed by an electrically conductive resin material which has a surface resistance of 10.sup.11 .OMEGA. or less, or has a volume resistance of 10.sup.11 .OMEGA..multidot.cm or less, and a discharge rib portion is integrally formed on the inner peripheral face of the shell. In a state where the fuel cap is attached to the filler neck, the distance between the discharge rib portion and the filler neck or the body of an automobile is 3 mm or less.

Abstract: A fuel tank cap with enhanced sealing property of a valve body of a positive pressure valve, which improves the pressure control ability of the fuel tank cap is disclosed. The positive pressure valve controls the pressure in a fuel tank by opening and closing a rubber valve body. The valve body is supported on its rear face by a valve support member, and is seated on and separated from a seat member. The valve body has a ring recess arranged in an outer circumferential portion thereof to form a thin-wall seating portion, which is seated on the seat member. The valve body is seated horizontally on the seat member, and is supported by the valve support member on both the inner circumferential side and the outer circumferential side of the ring recess.

Abstract: A fuel tank cap structure with reduced casing body weight and improved dimensional accuracy is disclosed. The casing body of the fuel tank cap has a valve chamber, in which a positive pressure valve and a negative pressure valve are received. The casing body includes an outer tubular body and a valve chamber-forming member located inside the outer tubular body. The outer tubular body is joined with the valve chamber-forming member via a horizontal joint member and vertical horizontal members, which are arranged in a hollow portion.

Abstract: A fuel tank cap structure and method of manufacturing which prevents a parting line formed on a cover member in the process of injection molding from being undesirably shaven. The fuel tank cap includes a casing body and a cover member that is rotatable in one direction relative to the casing body via a ratchet mechanism when a torque of or above a predetermined level is applied to the cover member. The cover member has fitting projections that are held by an outer ring member of the casing body. A slide mold is used for manufacturing the cover member having the fitting projections that are undercut in the injection molding. This causes a parting line to be formed on a top wall of the cover member. Anti-shaving projections formed at substantially the same height as that of the parting line prevent the parting line from being slid against the outer ring member and shaven.

Abstract: A fuel tank cap structure which enables a cover member to be readily attached to a casing body. The fuel tank cap includes the casing body and the cover member that is rotatable in one direction relative to the casing body via a ratchet mechanism when a torque of or above a predetermined level is applied to the cover member. The cover member has fitting projections that are held by an outer ring member of the casing body. The outer ring member has a plurality of slits, which cause the outer ring member to be elastically deformed when riding over the fitting projections, thereby facilitating the engagement of the fitting projections with the outer ring member.

Abstract: A fuel tank cap which enables static electricity to be discharged quickly and stably when the user manually touches a fuel tank cap to open or close the cap. The fuel tank cap has a casing body and a cover member with four discharge projections for discharging static electricity to a filler neck of a fuel tank. The four discharge projections are arranged in a third radial direction that has an angle of 45 degrees with respect to both a first radial direction and a second radial direction. The first radial direction, in which a handle member of the cover member is arranged, gives the maximum contraction of the cover member, whereas the second radial direction gives the minimum contraction of the cover member. The four discharge projections are arranged on a circle about the center of the cover member to reduce the effect of resin contraction.

Abstract: A hose 10 of the invention includes an outer hose member 12 composed of a rubber and an inner hose member 14 composed of a resin. A pair of projection ring elements 26 formed on opposite ends of the inner hose member 14 are received in a pair of inner circumferential grooves 24 formed in thick-walled tube elements 18 of the outer hose member 12. The projection ring elements extend the inner circumferential grooves 24 with such dilatation and deformation of the concavity of the inner circumferential grooves 24 enabling the thick-walled tube elements 18 to generate forces acting along the concavity of the inner circumferential grooves 24. Such forces are applied as pressing forces against the projection ring elements 26. The thick wall of the thick-walled tube elements 18 enables the pressing forces to be maintained while the projection ring elements 26 are retained in the inner circumferential grooves 24.

Abstract: A fuel cap structure which enables part of a flange member to be readily broken when an external force is applied via a cover member in any direction. A fuel cap includes a casing body and a cover member attached to the flange member formed on the upper portion of the casing body. The flange member includes a joint member to join the upper portion of the casing body with an outer ring member, in which the cover member is fitted. The joint member has fragile portions including notches. Each fragile portion starts a break of the joint member when an external force is applied to the flange member via the cover member in a variety of directions.

Abstract: A check valve (32) includes a cylindrical body (32) and a valve plate (32) attached to one end of the body (32) to open and close a flow outlet. A stepped seat element (36a) having a seat surface (36a) is formed along the periphery of the flow outlet of the body (40). The valve plate (40) is press-cut from a thin stainless steel plate to be integrally formed as a leaf spring. The valve plate includes a leaf element movable with respect to the seat surface so as to close and open the flow outlet, an arm element (41) coupled to the leaf element (41) via a joint element, and a base element connected to the arm element and received by a valve support projection on the cylindrical body.

Abstract: A hose includes an outer hose member, and an inner hose member. The outer hose member includes a first bellows-like tubular portion at least in the intermediate area in the axial direction. The inner hose member is disposed substantially coaxially in the outer hose member, includes a second bellows-like tubular portions in the area corresponding to the first bellows-like tubular portion of the outer hose member, and adapted to form a tubular air layer between the second bellows-like tubular portion and the first bellows-like tubular portion. Because of the outer hose member and the inner hose member, the hose exhibits a high flexibility, a reliable barrier ability against gasoline fuels or the like, and an improved adiabatic ability and anti-flammability for the inner hose member.

Abstract: A fuel additive pipe 11 comprised of a pipe main body 12 and a plating layer 13 formed on the external or interior wall surface of the pipe main body 12 and composed of an electroless plating layer 131 and an electroplating layer 132. The pipe main body 12 contains a high-density polyethylene as a base material and an additive 21 such as mica. While the pipe main body 12 is subjected to an etching treatment, the additive 21 does not dissolve in the etching solution, so that the additive 21 protrudes from the surface of the pipe main body 12. The thus protruding additive 21 serves as the starting point for forming the electroless plating layer 131 and promotes growth of the layer 131. This electroless plating layer 131 is firmly bonded with the pipe main body 12 by chemical absorption to the additive 21 from which inactive sites are removed by the etching treatment as well as by the physical absorption to the fine roughness formed by the etching treatment on the surface of the pipe main body 12.

Abstract: A cuvette, to be used for measuring the properties of liquid contained therein by applying a measuring beam of light from a direction intersecting the vertical axis of the cuvette, includes a rectangular or square-outlined portion on the top thereof as viewed in a horizontal cross section, a cylindrical portion below the top portion, and a lower rectangular or square portion provided vertically below the cylindrical portion and having four sides parallel to these of the top rectangular portion, respectively. Thus, the cuvette does not unfavorably rotate when measuring the absorption of light transmitted therethrough. Further, an apparatus for transporting the aforementioned transparent cuvette, accurately controls the position of the cuvette during transportation so that a flat surface thereof can be irradiated with a measuring beam of light.

Abstract: The controller executes a control calculation based on proportional and integration calculation parameters which are preset, and outputs a control output to a process, and comprises a display device for displaying panels having characters and figures thereon; a panel expanding key for instructing the display device to expand, or change, the panel to be displayed; a plurality of keys for setting control operations and various parameters; an operating panel generating unit for displaying as a bar graph; a process value and a control output value on an operating panel to be displayed on the display device; a trend graph panel generating unit for displaying the transition of the process value on a trend graph panel to be displayed on the display device; a tuning panel generating unit for displaying information to control the control parameter used in the control calculation on a tuning panel to be displayed on the display device; a display controlling unit for controlling the displays of the panels; and an operat