Abstract: When the common part of the outer pipe and the inner pipe is worked with the pressing-type punching-out work for connecting with the inner pipe, there occurs no possibility that any disadvantage caused by the punched-out debris is generated. An inner pipe is arranged at the inside of an outer pipe. Each part of the outer pipe and the inner pipe is partially made common and integrally formed to each other. The inner pipe has the side walls extending from a common part of the outer pipe and the inner pipe to the diametral direction of the outer pipe in parallel and the recess wall facing the common part of the outer pipe and the inner pipe at a deep end of the side walls is not expanded more than the space between the side walls.

Abstract: When the common part of the outer pipe and the inner pipe is worked with the pressing-type punching-out work for connecting with the inner pipe, there occurs no possibility that any disadvantage caused by the punched-out debris is generated. An inner pipe is arranged at the inside of an outer pipe. Each part of the outer pipe and the inner pipe is partially made common and integrally formed to each other. The inner pipe has the side walls extending from a common part of the outer pipe and the inner pipe to the diametral direction of the outer pipe in parallel and the recess wall facing the common part of the outer pipe and the inner pipe at a deep end of the side walls is not expanded more than the space between the side walls.

Abstract: A double pipe connection structure includes a joint member and a double pipe having an inner pipe and an outer pipe coaxially disposed therein. Further, the double pipe connection structure includes a supporting rib formed integrally therewith in an axial direction, wherein the supporting rib connects the inner pipe to the outer pipe. Further, the joint member includes a first hole into which the outer pipe is inserted and a second hole into which the inner pipe is inserted, wherein the second hole has a diameter that is smaller than a diameter of the first hole, and wherein the first and second holes are bored to be aligned in an axial direction. Moreover, in the joint member, a first-pressure connecting hole communicates with the first hold and a second-pressure connecting hole communicates with the second hole, such that a pressure in the first-pressure connecting hole is lower than a pressure in the second-pressure connecting hole.

Abstract: The invention is principally to provide an archival optical recording medium of high quality which has satisfactory recording/reading characteristics when used in high-speed recording and high-density recording. The invention accomplishes the object with an optical recording medium comprising a resin substrate, a recording layer comprising an organic dye, and a reflective layer, wherein the reflective layer has a first reflective layer and a second reflective layer in this order from the side close to the recording layer, the second reflective layer has a thermal conductivity lower than the thermal conductivity of the first reflective layer, and the first reflective layer has a film thickness larger than the thickness of the second reflective layer.

Abstract: The invention is principally to provide an archival optical recording medium of high quality which has satisfactory recording/reading characteristics when used in high-speed recording and high-density recording. The invention accomplishes the object with an optical recording medium comprising a resin substrate, a recording layer comprising an organic dye, and a reflective layer, wherein the reflective layer has a first reflective layer and a second reflective layer in this order from the side close to the recording layer, the second reflective layer has a thermal conductivity lower than the thermal conductivity of the first reflective layer, and the first reflective layer has a film thickness larger than the thickness of the second reflective layer.

Abstract: The invention is principally to provide an archival optical recording medium of high quality which has satisfactory recording/reading characteristics when used in high-speed recording and high-density recording. The invention accomplishes the object with an optical recording medium comprising a resin substrate, a recording layer comprising an organic dye, and a reflective layer, wherein the reflective layer has a first reflective layer and a second reflective layer in this order from the side close to the recording layer, the second reflective layer has a thermal conductivity lower than the thermal conductivity of the first reflective layer, and the first reflective layer has a film thickness larger than the thickness of the second reflective layer.

Abstract: The invention is principally to provide an archival optical recording medium of high quality which has satisfactory recording/reading characteristics when used in high-speed recording and high-density recording. The invention accomplishes the object with an optical recording medium comprising a resin substrate, a recording layer comprising an organic dye, and a reflective layer, wherein the reflective layer has a first reflective layer and a second reflective layer in this order from the side close to the recording layer, the second reflective layer has a thermal conductivity lower than the thermal conductivity of the first reflective layer, and the first reflective layer has a film thickness larger than the thickness of the second reflective layer.

Abstract: The present invention provides a double pipe connection structure where, in a distal end portion of an outer pipe of a double pipe, an outer pipe expanded part detached from a supporting rib and having a diameter expanded more than that of a general part of the outer pipe is formed; the outer pipe is coupled with a joint member by caulking a collar part at a periphery of an open end portion of a large diameter hole of the joint member in a state that an inner pipe end portion of the double pipe is inserted into a small diameter hole while an inner pipe side O-ring mounted on an outer periphery thereof is press-contacted with an inner periphery of the small diameter hole of the joint member; and the outer pipe expanded part is inserted into the large diameter hole while an outer pipe side O-ring mounted on an outer periphery thereof is press-contacted with an inner periphery of the large diameter hole of the joint member.

Abstract: A production apparatus for bending a multi-channel tube having an outer tube and a partition partitioning an interior of the outer tube into two or more channel holes is provided with a bending mold configured to bend the multi-channel tube in a bend radius; a pressure mold configured to press the multi-channel tube toward the bending mold; a chuck portion configured to hold and draw the multi-channel tube along the bending mold; and mandrels respectively inserted into the channel holes, each of the mandrels including; a mandrel body configured to support inner surfaces of each channel hole; a support device rotatably and movably supporting the mandrel body.

Abstract: A structure connects a first member and a second member. The first member has a peripheral wall portion that includes a stepped portion that is engaged with the second member. The peripheral wall portion is a deformed portion that is deformed inwardly of the stepped portion of the first member. The deformed portion has a thin shape that is provided by a cut section of the peripheral wall portion.

Abstract: A connection structure of a multi-channel tube with branching tubes is provided with a multi-channel tube having an end, the multi-channel tube including; an outer tube; a partition being formed in a unitary body and running parallel with the outer tube, the partition partitioning an interior of the outer tube into two or more channel holes; and a passage formed at an end of the partition, the passage linking the channel holes; two or more branching tubes respectively inserted into the channel holes to an insertion depth greater than a depth of the passage measured from the end of the multi-channel tube; and brazing material spreading beyond the passage over clearances between the multi-channel tube and the branching tubes and connecting the multi-channel tube and the branching tubes.

Abstract: A connection structure of a multi-channel tube with branching tubes is provided with a multi-channel tube having an end, the multi-channel tube including; an outer tube; a partition being formed in a unitary body and running parallel with the outer tube, the partition partitioning an interior of the outer tube into two or more channel holes; and a passage formed at an end of the partition, the passage linking the channel holes; two or more branching tubes respectively inserted into the channel holes to an insertion depth greater than a depth of the passage measured from the end of the multi-channel tube; and brazing material spreading beyond the passage over clearances between the multi-channel tube and the branching tubes and connecting the multi-channel tube and the branching tubes.

Abstract: A production apparatus for bending a multi-channel tube having an outer tube and a partition partitioning an interior of the outer tube into two or more channel holes is provided with a bending mold configured to bend the multi-channel tube in a bend radius; a pressure mold configured to press the multi-channel tube toward the bending mold; a chuck portion configured to hold and draw the multi-channel tube along the bending mold; and mandrels respectively inserted into the channel holes, each of the mandrels including; a mandrel body configured to support inner surfaces of each channel hole; a support device rotatably and movably supporting the mandrel body.

Abstract: A structure for connecting a first member and a second member, has a first member having a peripheral wall portion including a stepped portion engaged with a second member. The peripheral wall portion is a deformed portion deformed inwardly of the stepped portion of the first member. The deformed portion has a thin shape provided by a cut section of the peripheral wall portion.

Abstract: A vacuum cleaner having a vacuum cleaner main body, an electric blower motor provided in the vacuum cleaner main body, a dust collection part provided in the vacuum cleaner main body, a suction nozzle body for communicating with the dust collection part, an impeller having a rotary axis provided in an interior portion of the suction nozzle body and driven by a suction force which is generated by said electric blower motor. At least one of a rotation brush member and a rotation blade member is included in the suction nozzle body and an opening portion of the suction nozzle body is opposed to a surface to be subjected to cleaning, a suction inlet port for the suction nozzle body is provided for sucking air from an outside portion and is located separately from the opening portion of the suction nozzle body.

Abstract: At an interior portion of a suction nozzle body, an impeller and a brush member are installed. The impeller is rotated in response to an air flow produced by a suction force and a brush or a blade member is mounted in a spiral shape along the whole impeller or a part of the impeller and contacts a surface to be subjected to cleaning. The rotary brush rotates integrally with the impeller on the same shaft and no partition wall is provided between the impeller and the rotary brush. A suction nozzle body having a small size, and which is of light weight and provides for silent operation, and a vacuum cleaner using the same, can be provided.

Abstract: The present invention relates to a process for the production of hydrogen comprising treating in an anaerobic condition a substrate such as waste water including organic matter using sludge compost, whereby stable hydrogen generation at a higher efficiency for a longer period of time is attained together with the treatment of waste water.

Abstract: The disclosure describes an air circuit breaker including a compression coil; a second spring holder to compress the compression coil in the axial direction thereof; and a first spring holder which is subjected to the compression force of the compression coil, the second spring holder being constructed in such a manner that it is formed of a plate material in a rectangular shape, a pair of projected pieces are provided on both sides of the plate material, and a pin is held to pass between the pair of projected pieces in the direction of thickness of the plate so as to be able to support one end of the energy accumulating spring at four points with the pair of projected pieces and the pin in a compressible manner. After compression of the energy accumulating spring by pressure application thereto, its pressure application is released to stretch the energy accumulating spring so as to close a pair of contact points through the first and second spring holders.

Abstract: The present invention describes an air circuit breaker having a bounce preventive device which is provided on the direction changing lever interposed between the link mechanism to drive the contact opening and closing mechanism for closure of the contact and the contact opening and closing mechanism, so as to prevent the bouncing phenomenon from occuring at the time of the OFF-operation, thereby making it possible to secure accurate circuit breaking action.