Abstract: A scroll-type fluid machine in which: a fixed scroll and a moveable scroll are disposed in a housing; a fluid pocket, the volume of which varies, is formed between the fixed scroll and the moveable scroll; and a thrust plate for receiving the reaction force in the axial direction of pressure applied within the fluid pocket is disposed between the bottom plate of the moveable scroll and the housing. The scroll-type fluid machine is characterized in that at least the surface of the thrust plate facing the bottom plate of the moveable scroll is subjected to tin plating. As a consequence, it is possible to efficiently produce, at a low cost, a thrust bearing which is disposed between the bottom plate of the moveable scroll and the housing, exerts excellent seizure resistance, and has a high PV limit level and a low friction coefficient.

Abstract: A scroll-type fluid machine (1) in which in which a spiral body (50, 52) and an end plate (8a, 10a) come into sliding contact with each other between fixed and movable scrolls (8, 10) with a chip seal (56, 58), which is provided to the spiral body, intervening therebetween. The spiral body of at least one of the scrolls is provided, in the corner on the end plate side thereof, with a base portion (62) formed of a concave arc face (64), and the chip seal of the other scroll is provided, in the corner of a tip end (56a) thereof, with a fillet (70) that is formed of a first convex arc face (72) that comes into sliding contact with the concave arc face.

Abstract: A scroll-type fluid machine (1, 88) in which a fixed scroll (8) and a movable scroll (10), in consort, demarcate a compression or expansion chamber (60) of a lubricant-containing working fluid, the fluid machine having a housing (4) provided with a port (16) through which the working fluid passes, and a pedestal section (62) in which the port opens, and which is applied with thrust load on the back face (64) side of an end plate (10a) of the movable scroll due to the demarcation of the compression or expansion chamber. The pedestal section has a groove (72, 90) formed in a region including an opening of the port.

Abstract: In a scroll compressor, a fixed scroll (3) and a movable scroll (5) each having a spiral body are engaged with each other, grooves (13, 14) extending along the spiral shape of the spiral body are formed on the forward end surface of the spiral body of at least either one of the fixed scroll and movable scroll, and tip seals (11, 12) are disposed in the grooves so as to project from the forward end surface and be slidable on the bottom plate surface of the other scroll facing the forward end surface. The tip seals have large projection parts (17, 18) with a larger amount of projection from the forward end surface and small projection parts (19, 20) with a smaller amount of projection from the forward end surface, and the large projection parts and small projection parts are arranged alternately in the direction along the spiral shape of the spiral body.

Abstract: In a scroll compressor, a fixed scroll (3) and a movable scroll (5) each having a spiral body are engaged with each other, grooves (13, 14) extending along the spiral shape of the spiral body are formed on the forward end surface of the spiral body of at least either one of the fixed scroll and movable scroll, and tip seals (11, 12) are disposed in the grooves so as to project from the forward end surface and be slidable on the bottom plate surface of the other scroll facing the forward end surface. The tip seals have large projection parts (17, 18) with a larger amount of projection from the forward end surface and small projection parts (19, 20) with a smaller amount of projection from the forward end surface, and the large projection parts and small projection parts are arranged alternately in the direction along the spiral shape of the spiral body.

Abstract: A compressor is provided with an oil separator for separating part of the lubricating oil contained in the compressed refrigerant, path arrangement for connecting a separation chamber of the separator and a delivery port of the compressed refrigerant, the path arrangement having a plurality of linear holes with opening ends that open in the outer surface of the housing wall, and screw plugs closing the opening ends except for the one serving as the delivery port, and a safety device built in at least one of the screw plugs, the safety device having a pressure relief valve and/or a temperature sensor.

Abstract: A compressor is provided with an oil separator for separating part of the lubricating oil contained in the compressed refrigerant, path arrangement for connecting a separation chamber of the separator and a delivery port of the compressed refrigerant, the path arrangement having a plurality of linear holes with opening ends that open in the outer surface of the housing wall, and screw plugs closing the opening ends except for the one serving as the delivery port, and a safety device built in at least one of the screw plugs, the safety device having a pressure relief valve and/or a temperature sensor.

Abstract: A hermetic type scroll compressor includes a hermetically sealed compressor housing formed by first and second cup-shaped casings. A cylindrical housing portion is disposed between the first and second cup-shaped casings and has an annular inner block extending inwardly therefrom. The inner block divides the interior of the compressor into a first chamber in which the drive mechanism is housed and a second chamber in which the compression mechanism is housed. At one end, the drive shaft is supported by the inner block through bearings, and at the its other end, the drive shaft is supported by an annular projection extending from and integral with the second cup-shaped casing. Additionally, the stator is fixedly secured to the second cup-shaped casing. A gas passage, which allows the outer diameter of the compressor to be reduced, extends through the inner block to provide fluid communication between the first and second chambers.

Abstract: In a laser beam machine comprising: a laser oscillator for generating a laser beam; a machining head for applying the laser beam, as a light spot, to a workpiece mounted on a machining table; and a control unit for controlling the movement of the machining table in an X-Y plane, the laser beam is kept inclined with respect to the workpiece in the machining direction, whereby, when the machining speed is increased, the sticking of dross to the workpiece is suppressed, and the machining speed can be increased accordingly.