Abstract: An allowable angle of a float valve member with respect to a valve case is so set that a deformed direction, as caused by a gate position at a injection molding time, of a inner circumference of a communication hole of the valve case with respect to a roundness and a deformed direction, as caused by a gate position at a injection molding time, of an outer circumference of a crest portion of the float valve member with respect to the roundness may be substantially aligned. Between the valve case and the float valve member, there is an interposed angle regulating unit for preventing the angle of the float valve member with respect to the valve case from varying over the allowable angle.

Abstract: A non-return valve includes a main tube to be externally inserted into and joined to a fuel filling pipe, and a valve element to be provided on a downstream end of the main tube for allowing fuel to flow into a fuel tank and inhibiting a back flow out of the fuel tank. On an upstream side of the main tube, provided is a first inner tube including a first retaining portion relevant to the fuel filling pipe, an annular sealing member abutting on an inner periphery of the main tube and on an outer periphery of the fuel filling pipe, and a second inner pipe disposed more upstream than the first inner tube so as to sandwich the annular sealing member together with the first inner tube, the second inner tube including a second retaining portion relevant to the main tube.

Abstract: A resin member has a first barrel member 30, which can be welded to the fuel tank, and a second barrel member having a higher melting temperature than the first barrel member. The first barrel member is joined to the outer circumference of the second barrel member and protrudes at one axial end. The second barrel member protrudes at the other axial end. A bolt is inserted from one end where the first barrel member protrudes through the second barrel member out of an end face where the second barrel member protrudes. The first barrel member of the resin member is welded to the fuel tank. The bolt is inserted into a mounting hole of the heat insulation plate and securely fastened. A flange spreading diametrically is preferably formed on a protruding end face of the second barrel member.

Abstract: Pyrazine derivatives represented by general formula [1]: 1

Abstract: A non-return valve includes a main tube to be externally inserted into and joined to a fuel filling pipe, and a valve element to be provided on a downstream end of the main tube for allowing fuel to flow into a fuel tank and inhibiting a back flow out of the fuel tank. On an upstream side of the main tube, provided is a first inner tube including a first retaining portion relevant to the fuel filling pipe, an annular sealing member abutting on an inner periphery of the main tube and on an outer periphery of the fuel filling pipe, and a second inner pipe disposed more upstream than the first inner tube so as to sandwich the annular sealing member together with the first inner tube, the second inner tube including a second retaining portion relevant to the main tube.

Abstract: Processes for producing a 7-isoindoline-quinolonecarboxylic acid derivative represented by the general formula [1] which is useful as an antibacterial agent, and an intermediate thereof: comprising reacting, in the presence of metallic palladium, an isoindoline-5-boronic acid, or of a 5-halogenoisoindoline, in the presence of a palladium catalyst, with a dialkoxyborane or an alkoxydiborane.

Abstract: Processes for producing a 7-isoindoline-quinolonecarboxylic acid derivative represented by the general formula [1] which is useful as an antibacterial agent, and an intermediate thereof: 1

Abstract: This invention relates to processes for producing a 7-isoindoline-quinolonecarboxylic acid derivative represented by the general formula [1] which is useful as an antibacterial agent, and an intermediate thereof: wherein R1 represents a hydrogen atom or a carboxyl-protecting group; R2 represents a substituted or unsubstituted alkyl, alkenyl, cycloalkyl, aryl or heterocyclic group; R3 represents at least one group selected from hydrogen atom, halogen atoms, substituted or unsubstituted alkyl, alkenyl, cycloalkyl, aryl, alkoxy or alkylthio groups, nitro group, cyano group, acyl groups, protected or unprotected hydroxyl groups and protected or unprotected or substituted or unsubstituted amino groups; R4 represents at least one group selected from hydrogen atom, halogen atoms, substituted or unsubstituted alkyl, alkenyl, cycloalkyl, aralkyl, aryl, alkoxy or alkylthio groups, protected or unprotected hydroxyl or imino groups, protected or unprotected or substituted or unsubstituted amin