Abstract: The present invention relates to a synapse formation promoter and a brain plasticity promoter comprising CD24-negative mesenchymal stem cells prepared from a patient's own bone marrow aspirate and treatment of dementia, chronic-phase cerebral infarction, chronic-phase spinal cord injury, mental diseases, and the like using the synapse formation promoter and brain plasticity promoter.

Abstract: A lubricating oil composition for refrigerator including a base oil and an acid scavenger, and a compressor using the composition are provided, where the acid scavenger is a polyalkylene glycol derivative represented by a formula (1) as follows: R1—[(OR2)e—OR3]f??(1) and the base oil is at least one compound selected from a group consisting of polyvinyl ether, polyalkylene glycol and an ether-base compound represented by a formula (2) as follows, Ra-[(ORb)n-(X)—(ORc)k]x-Rd??(2) where meanings of respective signs are as described in the specification.

Abstract: A lubricating oil composition for refrigerators comprising a base oil which comprises as a main component a polyol ester compound obtained from a polyhydric alcohol selected from among pentaerythritol, dipentaerythritol, trimethylolpropane, and neopentyl glycol and a C4 to C20 aliphatic monocarboxylic acid and which has an acid value of 0.02 mgKOH/g or less and a hydroxyl value of 5 mgKOH/g or less. A compressor using the lubricating composition. The lubricating oil composition is applicable to such refrigerators that use a refrigerant having a specific structure, such as an unsaturated fluorinated hydrocarbon compound, and being usable in current car air conditioner systems, and has excellent compatibility with the refrigerant, good sealing properties, capability of imparting a low coefficient of friction to sliding members and, yet, excellent stability. The compressor uses the lubricating composition.

Abstract: Provided is a lubricant composition for a refrigerator, which is characterized by using a substance mainly containing a polyoxyalkylene glycol derivative and having a hydroxyl number of 5 mgKOH/g or less, as a base oil. Also provided is a compressor using such the lubricant composition for a refrigerator. The lubricant composition for a refrigerator is used for a refrigerator which uses a refrigerant having a specific structure such as an unsaturated fluorohydrocarbon and being usable in current air-conditioning systems for cars or the like. The lubricant composition for a refrigerator exhibits excellent compatibility with the refrigerant, while having excellent stability. The compressor uses such the lubricant composition for a refrigerator.

Abstract: A lubricating oil composition for refrigerator including a base oil and an acid scavenger, and a compressor using the composition are provided, where the acid scavenger is a polyalkylene glycol derivative represented by a formula (1) as follows: R1-[(OR2)e—OR3]f??(1) and the base oil is at least one compound selected from a group consisting of polyvinyl ether, polyalkylene glycol and an ether-base compound represented by a formula (2) as follows, Ra-[(ORb)n-(X)—(ORc)k]x-Rd??(2) where meanings of respective signs are as described in the specification.

Abstract: Provided is a lubricant composition for a refrigerator, which is characterized by using a substance mainly containing a polyoxyalkylene glycol derivative and having a hydroxyl number of 5 mgKOH/g or less, as a base oil. Also provided is a compressor using such the lubricant composition for a refrigerator. The lubricant composition for a refrigerator is used for a refrigerator which uses a refrigerant having a specific structure such as an unsaturated fluorohydrocarbon and being usable in current air-conditioning systems for cars or the like. The lubricant composition for a refrigerator exhibits excellent compatibility with the refrigerant, while having excellent stability. The compressor uses such the lubricant composition for a refrigerator.

Abstract: A lubricating oil composition for refrigerators comprising a base oil which comprises as a main component a polyol ester compound obtained from a polyhydric alcohol selected from among pentaerythritol, dipentaerythritol, trimethylolpropane, and neopentyl glycol and a C4 to C20 aliphatic monocarboxylic acid and which has an acid value of 0.02 mgKOH/g or less and a hydroxyl value of 5 mgKOH/g or less. A compressor using the lubricating composition. The lubricating oil composition is applicable to such refrigerators that use a refrigerant having a specific structure, such as an unsaturated fluorinated hydrocarbon compound, and being usable in current car air conditioner systems, and has excellent compatibility with the refrigerant, good sealing properties, capability of imparting a low coefficient of friction to sliding members and, yet, excellent stability. The compressor uses the lubricating composition.

Abstract: A limiter device is provided in a variable displacement compressor capable of varying a discharge displacement per revolution and compressing a fluid in a cycle. The limiter device includes an operating characteristic acquiring means for acquiring a predetermined characteristic during a compression operation of the compressor, and a varying means for varying the discharge displacement of the compressor to a minimum side when the predetermined characteristic obtained by the operating characteristic acquiring means exceeds a predetermined value. Thus, the limiter device can prevent the compressor from being brought into trouble such as locking and can protect a driving belt and other auxiliary equipment on a side of an engine, while it is unnecessary to provide a pulley with a limiter function.

Abstract: An object of the present invention is to protect a shaft seal of a variable displacement compressor of an air conditioner for a vehicle by the control thereof. The air conditioner for a vehicle comprises a variable displacement swash plate type compressor for compressing a refrigerant and a control unit for controlling the compressor. The compressor is driven by an engine of a vehicle and is normally connected to the engine at all times. The control unit controls the compressor such that when the compressor is in an off state the compressor turns on and operates at predetermined time intervals of 10 minutes and for one minute, and the revolution speed of the compressor is equal to or higher than predetermined 6,000 rpm.

Abstract: A limiter device is provided in a variable displacement compressor capable of varying a discharge displacement per revolution and compressing a fluid in a cycle. The limiter device includes an operating characteristic acquiring means for acquiring a predetermined characteristic during a compression operation of the compressor, and a varying means for varying the discharge displacement of the compressor to a minimum side when the predetermined characteristic obtained by the operating characteristic acquiring means exceeds a predetermined value. Thus, the limiter device can prevent the compressor from being brought into trouble such as locking and can protect a driving belt and other auxiliary equipment on a side of an engine, while it is unnecessary to provide a pulley with a limiter function.

Abstract: A compressor is provided with a housing having a boss portion forming a central bore through which a drive shaft is passed, and a clutch has a rotor rotatably supported by the boss portion through a ball bearing. An armature thereof has a frictional surface facing, with a small gap therebetween, a frictional surface of the rotor, and a holder plate is connected to a surface of the armature opposite that frictional surface by rivets. The holder plate has a tubular portion connected to a hub via an annular cushion rubber, and the hub is in spline engagement with the drive shaft of the compressor. An oil sleeve is oil-tightly fitted to the boss portion and axially passed through a central opening of a cover located on the surface of the armature, opposite the frictional surface thereof. The oil sleeve has at its free end an annular flange shaped oil cut portion radially faced with the cover.