Abstract: In a profiling method, a shank section of a rotary tool which has a cutter and a rotatable journal bearing provided at a tip of a cutter, is chucked, and a spindle for driving the tool is resiliently supported in such a way as to be movable perpendicularly to the tool axis, the rotatable journal bearing being pressed against a surface of a workpiece to perform machining thereon by using the surface as a reference.

Abstract: In a scroll compressor, a stationary scroll is pressed toward a movable scroll by a back pressure of a discharge fluid compressed by a compression mechanism, and wear powder, produced from an annular seal (which receives the pressure of the discharge fluid) as a result of precession of the stationary scroll, is arrested, thereby achieving the scroll compressor high in efficiency and reliability. A pressure-receiving surface for receiving a back pressure of the discharge fluid so as to press the stationary scroll toward the movable scroll is formed on that portion of the stationary scroll disposed around a communication port which is formed in the stationary scroll, and communicates with a discharge port.

Abstract: A thrust plate disposed between an orbiting scroll member and a bearing for receiving a force axially exerted thereon is provided with a protrusion formed on the same plane as the thrust plate and projected radially inward. The bearing has a thrust plate holder comprising a recess to which the protrusion of the thrust plate fits in, by which the thrust plate is prevented from rotating while being able to move smoothly in an axial direction. Abrasion caused by rotation of the thrust plate is thus prevented, as well as abrasion on outer circumferential parts of the thrust plate can be prevented as a result of the thrust plate is capable of slightly shifting for adjustment to follow up any precessional movement of a thrust load.

Abstract: A scroll compressor has a closed vessel, a compression mechanism accommodated in the closed vessel and including a non-orbiting scroll and an orbiting scroll in engagement with each other, and an electric motor for driving the compression mechanism. The non-orbiting scroll includes a frame portion and a non-orbiting end plate axially movable relative to the frame portion. The frame portion has a recess defined therein and a pin secured thereto. The non-orbiting end plate has a cylindrical wall integrally formed therewith and loosely received in the recess, thereby radially positioning the non-orbiting end plate relative to the frame portion. The non-orbiting end plate also has a recess defined therein in which the pin is loosely received, thereby circumferentially positioning the non-orbiting end plate relative to the frame portion.

Abstract: A scroll compressor has a closed vessel, a compression mechanism accommodated in the closed vessel and including a non-orbiting scroll and an orbiting scroll in engagement with each other, and an electric motor for driving the compression mechanism. The non-orbiting scroll includes a frame portion and a non-orbiting end plate axially movable relative to the frame portion. The frame portion has a recess defined therein and a pin secured thereto. The non-orbiting end plate has a cylindrical wall integrally formed therewith and loosely received in the recess, thereby radially positioning the non-orbiting end plate relative to the frame portion. The non-orbiting end plate also has a recess defined therein in which the pin is loosely received, thereby circumferentially positioning the non-orbiting end plate relative to the frame portion. The pin is hardened so as to have a Rockwell hardness of more than 35 on scale C and has a chemical compound layer deposited thereon, to thereby minimize wear thereof.

Abstract: A scroll compressor has a compression mechanism accommodated in a closed container and comprising a stationary scroll and an orbiting scroll. The stationary scroll includes a frame and a separate wrap element secured to the frame or otherwise movable relative to the frame. The orbiting scroll has a wrap element allowed to undergo circular translation with respect to the wrap element of the stationary scroll to compress gas. The wrap element of the stationary scroll is made of a readily machinable abrasion-resistant material to reduce the manufacturing cost of the scroll compressor.

Abstract: In a scroll compressor, an internal space of a sealed container is partitioned by a cylinder-shaped partition wall into a delivery chamber and a suction chamber including a driving motor, and a pressure relief valve is provided with the cylinder-shaped partition wall, and a thermal switch is disposed at the position to receive heat of the high-pressure coolant relieved from the pressure relief valve into the suction chamber, thereby, the pressure relief valve reduces pressure of coolant of the delivery chamber, and thermal switch is operated by the coolant from the pressure relief valve so as to stop the driving motor.

Abstract: A scroll compressor has a compression mechanism accommodated in a closed container and comprising a stationary scroll and an orbiting scroll. The stationary scroll includes a frame and a separate wrap element secured to the frame or otherwise movable relative to the frame. The orbiting scroll has a wrap element allowed to undergo circular translation with respect to the wrap element of the stationary scroll to compress gas. The wrap element of the stationary scroll is made of a readily machinable abrasion-resistant material to reduce the manufacturing cost of the scroll compressor.

Abstract: A scroll compressor includes a compression mechanism having a stationary scroll and an orbiting scroll in engagement with each other, a crank shaft for causing orbiting of the scroll relative to the stationary scroll, a bearing member for rotatably supporting the crank shaft and having a thrust bearing for axially supporting the orbiting scroll, an electric motor for driving the crank shaft, and an eccentric bearing radially movably accommodated within a recess defined in an end portion of the crank shaft. The orbiting scroll has a shaft journaled in the eccentric bearing. A leaf spring is interposed between the eccentric bearing and a side wall of the recess for pressing the eccentric bearing radially outwardly. The eccentric bearing has inclined planes defined on an external surface thereof for receiving a biasing force of the leaf spring so that an axial component of the biasing force is directed towards the crank shaft.

Abstract: A scroll compressor includes a scroll assembly accommodated in a closed container, a crankshaft for driving the scroll assembly, a main bearing for rotatably supporting one end of the crankshaft, and an auxiliary bearing for rotatably supporting the other end of the crankshaft. A recess is defined between the internal surface of the closed container and the external surface of a compression section comprised of the scroll assembly and the main bearing. A portion of a jig is inserted into the recess to achieve concentricity and parallelism of the auxiliary bearing with respect to the main bearing using reference planes defined in the auxiliary bearing and the compression section or by radially adjusting the auxiliary bearing.

Abstract: A scroll compressor includes a scroll assembly accommodated in a closed container, a crankshaft for driving the scroll assembly, a main bearing for rotatably supporting one end of the crankshaft, and an auxiliary bearing for rotatably supporting the other end of the crankshaft. A recess is defined between the internal surface of the closed container and the external surface of a compression section comprised of the scroll assembly and the main bearing. A portion of a jig is inserted into the recess to achieve concentricity and parallelism of the auxiliary bearing with respect to the main bearing using reference planes defined in the auxiliary bearing and the compression section or by radially adjusting the auxiliary bearing.

Abstract: A scroll compressor has a closed container 1 with a bottom serving as an oil storage 10 reserving lubricating oil 9. A gas-liquid separator 28 is provided near the closed container 1. An intake pipe 23 is connected to an upper end of the gas-liquid separator 28. An intake gas connecting pipe 29 extends normal to the axial direction of the gas-liquid separator 28 to connect the upper part of the gas-liquid separator 28 with the closed container 1. Meanwhile, a connecting pipe 24 is provided to connect the bottom of the gas-liquid separator 28 with the oil storage 10 in the closed container 1. Furthermore, there in provided a filter 30 between the intake pipe 23 and the intake gas connecting pipe 29. Thus, oil amount introduced into the compressor is reduced. Reliability is increased, and efficiency of air-conditioning apparatus is improved.

Abstract: A scroll blade of a scroll fluid machine is formed of eutectic graphite cast iron in whose structure the average value of the largest eutectic shell is not more than one fourth of the height of a lap of the scroll blade. The scroll blade material thus formed will facilitate increasing working precision and reducing the number of working steps.