Abstract: A technique that can synthesize an aromatic sodium compound easily, in a short time, and efficiently through a small number of steps is constructed.

Abstract: Provided are an electron donor that is easy to handle and can be used to carry out a coupling reaction economically and efficiently through simple operations under mild conditions in a short period of time, and a method for synthesizing 4,4?-bipyridine using the electron donor. The electron donor includes a mixture of a dispersion product obtained by dispersing sodium in a dispersion solvent and 1,3-dimethyl-2-imidazolidinone, and this electron donor is used in the method for synthesizing 4,4?-bipyridine.

Abstract: An object is to establish a technology with which a boronate ester compound can be easily and efficiently synthesized at a low cost with a small number of steps without the need for a complex chemical method and reagents that need to be carefully handled. A further object is to establish a sodium salt of a boronate ester compound that is a novel compound and a technology for synthesizing the sodium salt of a boronate ester compound. Provided are a sodium salt of a boronate ester compound and a method for synthesizing a boronate ester compound or a sodium salt of a boronate ester compound that includes reacting, in a reaction solvent, an organic chloride with a dispersion product obtained by dispersing sodium in a dispersion solvent to obtain an organic sodium compound, and reacting the obtained organic sodium compound with a borate ester compound to obtain a boronate ester compound or a sodium salt of a boronate ester compound.

Abstract: An object is to establish a technology with which an organic magnesium compound can be easily and efficiently synthesized at a low cost with few steps that do not involve a complex chemical method. A method for synthesizing an organic magnesium compound includes, in a reaction solvent, reacting an organic halide represented by General Formula I (Ra—Xa) with a dispersion product obtained by dispersing sodium in a dispersion solvent to obtain an organic sodium compound represented by General Formula II (Ra—Na), and reacting the obtained organic sodium compound with a magnesium halide represented by General Formula III (Mg—(Xb)2) to obtain an organic magnesium compound represented by General Formula IV (Ra—Mg—Xb).

Abstract: There is a demand for the development of a technique according to which sodium 2,2,6,6-tetramethylpiperidides (Na-TMPs) can be economically and efficiently synthesized through simple operations including a small number of steps under mild conditions in a short period of time. Also, there is a demand for the development of a technique according to which high-quality Na-TMPs that do not contain lithium or lithium compounds such as Li-TMP can be synthesized. The method for synthesizing sodium 2,2,6,6-tetramethylpiperidides includes a step of obtaining sodium 2,2,6,6-tetramethylpiperidides by reacting, in a reaction solvent, 2,2,6,6-tetramethylpiperidines with a dispersion product obtained by dispersing sodium in a dispersion solvent or an organosodium compound having an aromatic ring obtained through a reaction with a dispersion product obtained by dispersing sodium in a dispersion solvent.

Abstract: Provided are an electron donor that is easy to handle and can be used to carry out a coupling reaction economically and efficiently through simple operations under mild conditions in a short period of time, and a method for synthesizing 4,4?-bipyridine using the electron donor. The electron donor includes a mixture of a dispersion product obtained by dispersing sodium in a dispersion solvent and 1,3-dimethyl-2-imidazolidinone, and this electron donor is used in the method for synthesizing 4,4?-bipyridine.

Abstract: A target bipyridine compound is synthesized with high purity and a high yield in a simple and safe manner in a short period of time. A method for synthesizing a di-tert-butyl-2,2?-bipyridine compound is provided, and the method includes a step of reacting, in a reaction solvent, a tert-butylpyridine compound with a dispersion product obtained by dispersing an alkali metal in a dispersion solvent. A method for synthesizing a bipyridine compound having no substituents is also provided, and the method includes a step of reacting, in a reaction solvent, pyridine with a dispersion product obtained by dispersing an alkali metal in a dispersion solvent.

Abstract: There is a demand for the development of a technique according to which sodium 2,2,6,6-tetramethylpiperidides (Na-TMPs) can be economically and efficiently synthesized through simple operations including a small number of steps under mild conditions in a short period of time. Also, there is a demand for the development of a technique according to which high-quality Na-TMPs that do not contain lithium or lithium compounds such as Li-TMP can be synthesized. The method for synthesizing sodium 2,2,6,6-tetramethylpiperidides includes a step of obtaining sodium 2,2,6,6-tetramethylpiperidides by reacting, in a reaction solvent, 2,2,6,6-tetramethylpiperidines with a dispersion product obtained by dispersing sodium in a dispersion solvent or an organosodium compound having an aromatic ring obtained through a reaction with a dispersion product obtained by dispersing sodium in a dispersion solvent.

Abstract: A target bipyridine compound is synthesized with high purity and a high yield in a simple and safe manner in a short period of time. A method for synthesizing a di-tert-butyl-2,2?-bipyridine compound is provided, and the method includes a step of reacting, in a reaction solvent, a tert-butylpyridine compound with a dispersion product obtained by dispersing an alkali metal in a dispersion solvent. A method for synthesizing a bipyridine compound having no substituents is also provided, and the method includes a step of reacting, in a reaction solvent, pyridine with a dispersion product obtained by dispersing an alkali metal in a dispersion solvent.

Abstract: The present invention relates to an electromagnetic coupling device. In the electromagnetic coupling device according to the present invention, ends (5a and 5b) of a winding of an electromagnetic coil (5) are fitted to grooves of a terminal casing, and terminal members (19a and 19b) are press-fitted to a groove crossing the abovementioned groove, so that lead wires (18a and 18b) held by the terminal members (19a and 19b) are electrically connected to the ends (5a and 5b) of the winding. Terminal lines (51a and 51b) made of enameled copper wires are connected to the opposite ends of the winding of the electromagnetic coil (5) made of an aluminum wire, and the terminal lines (51a and 51b) handled as the ends (5a and 5b) of the winding are connected to brass-made connection pieces (29a and 29b) of the terminal members (19a and 19b).

Abstract: To provide a scroll-type fluid machine in which the influence on power recovery efficiency of a clearance in an expansion section is reduced. A scroll-type fluid machine (100) includes: a scroll unit (20) in which a fixed scroll (3) and an orbiting scroll (4) are disposed and an expansion section (1) and a compression section (2) are formed; and a support part (30) that supports the orbiting scroll (3) so as to be able to perform revolving motion, the compression section (2) being driven by power recovered in the expansion section (1). A minimum clearance between a wrap (3L) of the fixed scroll (3) and a wrap (4L) of the orbiting scroll (4) in the expansion section (1) is set to be less than a minimum clearance between the wrap (3L) of the fixed scroll (3) and the wrap (4L) of the orbiting scroll (4) in the compression section (2).

Abstract: The present invention relates to an electromagnetic coupling device. In the electromagnetic coupling device according to the present invention, ends (5a and 5b) of a winding of an electromagnetic coil (5) are fitted to grooves of a terminal casing, and terminal members (19a and 19b) are press-fitted to a groove crossing the abovementioned groove, so that lead wires (18a and 18b) held by the terminal members (19a and 19b) are electrically connected to the ends (5a and 5b) of the winding. Terminal lines (51a and 51b) made of enameled copper wires are connected to the opposite ends of the winding of the electromagnetic coil (5) made of an aluminum wire, and the terminal lines (51a and 51b) handled as the ends (5a and 5b) of the winding are connected to brass-made connection pieces (29a and 29b) of the terminal members (19a and 19b).

Abstract: A variable displacement compressor comprises an opening-degree adjustment valve which is disposed in a flow passage between a suction port and a suction hole communicating with a cylinder bore and variably controls the opening area of the flow passage. The variable displacement compressor is characterized in that the resistance against the movement of the valve body of the opening-degree adjustment valve in the direction of increasing the opening area of the flow passage is made to be greater than the resistance against the movement thereof in the direction of decreasing the opening area. The liquid compression at the starting of the compressor is prevented from occurring, whereby the durability and the reliability of the device can be improved and the device can exhibit excellent displacement control responsiveness.

Abstract: A power transmission in which a driven body and a drive body for driving the driven body are rotated in the same direction and are coupled through a coupling portion, transmission of torque from the drive body is interrupted when the driving load of the driven body exceeds a predetermined level, and the coupling portion is constituted by combining members different from each other of a positive torque transmission member for transmitting torque in the direction of forward rotation and interrupting transmission of torque from the drive body by its own fracture when the driving load of the driven body exceeds the predetermined level and a negative torque transmission member capable of transmitting torque in the direction of reverse rotation. At a contact portion between the positive torque transmission member and the negative torque transmission member, interposed is a surface layer composed of a different kind of material from a material composing the positive and negative torque transmission members.

Abstract: A power transmission interconnects a drive body and a driven body by a coupling member, transmits torque of the drive body to the driven body, and interrupts the torque when a drive load of the driven body exceeds a predetermined value. The coupling member has, as separate sections in the coupling member, both of a positive torque transmission section and a negative torque transmission section. The positive torque transmission section holds torque in the forward rotational direction and, when a drive load of the driven body exceeds the predetermined value, interrupts transmission of torque from the drive body by its own fracture. The negative torque transmission section holds torque in the reverse rotational direction. Even if there is a torque fluctuation on the drive body, its influence can be suppressed as little as possible, and interruption of torque can be performed properly at a target interruption torque value.

Abstract: A power transmission in which a driven body and a drive body for driving the driven body are rotated in the same direction and are coupled through a coupling portion, transmission of torque from the drive body is interrupted when the driving load of the driven body exceeds a predetermined level, and the coupling portion is constituted by combining members different from each other of a positive torque transmission member for transmitting torque in the direction of forward rotation and interrupting transmission of torque from the drive body by its own fracture when the driving load of the driven body exceeds the predetermined level and a negative torque transmission member capable of transmitting torque in the direction of reverse rotation. At a contact portion between the positive torque transmission member and the negative torque transmission member, interposed is a surface layer composed of a different kind of material from a material composing the positive and negative torque transmission members.

Abstract: A variable displacement compressor comprises an opening-degree adjustment valve which is disposed in a flow passage between a suction port and a suction hole communicating with a cylinder bore and variably controls the opening area of the flow passage. The variable displacement compressor is characterized in that the resistance against the movement of the valve body of the opening-degree adjustment valve in the direction of increasing the opening area of the flow passage is made to be greater than the resistance against the movement thereof in the direction of decreasing the opening area. The liquid compression at the starting of the compressor is prevented from occurring, whereby the durability and the reliability of the device can be improved and the device can exhibit excellent displacement control responsiveness.

Abstract: A power transmission interconnects a drive body and a driven body by a coupling member, transmits torque of the drive body to the driven body, and interrupts the torque when a drive load of the driven body exceeds a predetermined value. The coupling member has, as separate sections in the coupling member, both of a positive torque transmission section and a negative torque transmission section. The positive torque transmission section holds torque in the forward rotational direction and, when a drive load of the driven body exceeds the predetermined value, interrupts transmission of torque from the drive body by its own fracture. The negative torque transmission section holds torque in the reverse rotational direction. Even if there is a torque fluctuation on the drive body, its influence can be suppressed as little as possible, and interruption of torque can be performed properly at a target interruption torque value.

Abstract: A power transmission device having a coupling portion of a driven body and a drive body constituted by combining a positive torque transmission member for transmitting torque in forward rotational direction but interrupting transmission of torque from the drive body by breaking itself when the drive load of the driven body exceeds a predetermined level, with a separate negative torque transmission member for transmitting torque in reverse rotational direction is further provided with a means for generating pretension in the positive torque transmission member in the pulling direction and simultaneously generating a pretension in the negative torque transmission member in the compressing direction after both torque transmission members are combined. A highly reliable power transmission device which can impart a desired pretension precisely and conveniently, and can interrupt torque properly by suppressing fatigue of material at the coupling portion can be provided.

Abstract: An object of the present invention is to provide a reciprocal compressor wherein a cylinder block is provided with a void space communicating with a discharge chamber to increase the volume of the discharge chamber and which can resolve the problem of a conventional reciprocal compressor.