Abstract: In a scroll type compressor, a simple structure provides oil intake assistance to ensure that lubricating oil in an oil space is induced into a spiral groove in correspondence to the rotation rate of a drive shaft. The drive shaft is provided with an inclined spiral groove which is formed in the external circumferential surface of the drive shaft. The drive shaft slides in contact with a main bearing. A leading end of the spiral groove, in the direction of the rotation of the drive shaft, communicates with the oil space and a trailing end of the spiral groove opens into the lubricating oil reservoir. The lubricating oil is supplied to the area where the drive shaft slides in contact with the main bearing by the spiral groove. Also, upon rotation of the drive shaft, intake of lubricating oil into the spiral groove is assisted when the suction force is reduced due to a high rotation rate.

Abstract: A scroll type compressor including a drive shaft which is provided with a spiral groove formed in an external circumferential surface of the drive shaft. The spiral groove communicates diagonally between the oil space and the upper portion of the main bearing to ensure sufficient lubrication and sealing in the area where the drive shaft slide in contact with the main bearing. A seal bearing portion is positioned between the oil space and the low pressure space to isolate the oil space from the low pressure orbiting space, achieving an improvement in lubrication. The seal bearing portion is constituted with a seal washer, a seal bearing and a seal member, and, furthermore, with seal reinforcing material, to especially improve the seal between the oil space and the oscillation space.

Abstract: A scroll compressor reduces the load applied to the thrust bearing, to prevent a thrust bearing from seizing and to improve the service life of the thrust bearing. It comprises an electric motor that is provided within a high pressure space inside a sealed case with a stator fixed within the sealed case and a rotor fixed to a drive shaft. An oscillating shaft is decentered on and extends from the drive shaft. An oscillating scroll member has an insertion hole into which the oscillating shaft is inserted. A fixed scroll member forms a compression space by fitting into the oscillating scroll member, and a block secures the fixed scroll member inside the sealed case and clamps the oscillating scroll member so that it can oscillate freely between the block and the fixed scroll member. The thrust bearing is provided between the drive shaft and the block to hold the lower end of the drive shaft so that it can rotate freely.

Abstract: In order to provide a simple structure to achieve sufficient lubrication and sealing in the various areas of a scroll compressor where sliding contact occurs, a spiral groove that communicates between a high-pressure side space and an area at an upper portion of a main bearing is formed on the external circumferential surface of the drive shaft where it comes in contact with and slides against the main bearing. A seal bearing is provided in a drive shaft-receiving block between the high-pressure side space and a low pressure side space to seal off the high-pressure side space from the low pressure side space. An oil supply hole is provided that communicates between the high-pressure side space and an oscillation space which is formed by an oscillating scroll member and an oscillating shaft. With this, a first oil passage that lubricates the main bearing and a second oil passage that lubricates an oscillating shaft-insertion hole are formed.

Abstract: To reduce a load applied to the thrust bearing, to prevent the thrust bearing from seizing and to improve the service life of the thrust bearing, the thrust bearing is provided between a drive shaft and a block to seal a high-pressure side space from a low-pressure side space. By providing an oil supply through hole, one end of which opens into high-pressure side space and the other end of which opens into a space formed by inserting the shaft into the insertion hole, high-pressure lubricating oil can be supplied to the space. The constric within the shaft with the effect of the constriction clearance is formed between the aforementioned oscillating shaft and the insertion hole, and a pressure differential between the two ends of the drive shaft is eliminated.

Abstract: A swash plate type axial piston pump having a valve plate along which a cylinder block slides. The valve plate has an intake port and a discharge port, respectively positioned on a small pitch circle. Oil passages are slanted extending from the intake port and the discharge port to a cylinder hole of the cylinder block of the piston pump, converging at an axial centerline of the cylinder block. Being different from the slanted oil passage, oil guide holes are formed extending from a bottom of the cylinder hole in parallel with a rotary shaft. Supplying pressed oil to the oil guide hole enables to decrease a pressure between the cylinder block and the valve plate.

Abstract: A connector device for electrically connecting an IC card to a reading and/or writing apparatus. A first guide defining a transport path for the IC card is arranged within a casing having an insertion opening for the IC card. The transport path for the IC card extends from the insertion opening. A second guide extends in inclined relation to the transport path. A contact-probe support is guided by the second guide. The contact-probe support has supported thereon a plurality of contact probes projecting toward the first guide and an elastic arrangement biasing the contact probes toward the first guide. An abutment is associated with the contact-probe support and is arranged in crossing relation to the transport path.