Abstract: A scroll fluid machine comprising a first scroll rotated by a drive source, a second scroll eccentric from the central axis of the first scroll, the second scroll cooperating with the first scroll to compress fluid, a coupling which is provided on the outer end surface of one of said first and second scrolls and engaged with the one scroll at two positions in the periphery thereof so that the scrolls are movable in diametrical directions which are perpendicular to each other, respectively, and a pair of coupling arms which are provided on the other of the first and second scrolls and engaged with the coupling at two positions in the periphery thereof, in such a manner that the phantom line connecting the positions of engagement of said coupling arms is perpendicular to the phantom line connecting the positions of engagement of said coupling.

Abstract: A scroll-type positive displacement apparatus which can be used as a vacuum pump is disclosed. A pair of interfitting scrolls are housed in a first container which communicates with a vacuum chamber to be evacuated by the pump. The scrolls are rotated in synchrony about parallel, nonaligned axis by a drive motor. The scrolls define a plurality of spiral compression chambers which change in size when the scrolls are rotated, compressing a gas contained in the compression chambers. The shaft of one of the scrolls has a discharge port formed therein which communicates between the centermost compression chamber and the inside of a second container which adjoins the first container. The second container is partially filled with lubricating oil and communicates with the atmosphere. The discharge port is equipped with a check valve which permits compressed gas to enter the second container from the scrolls but prevents gas from flowing in the opposite direction.

Abstract: In a scroll compressor for compressing gas by the relative orbital movement between first and second scrolls which combined with each other to form a compresson chamber therebetween and a super-charging tube is connected to an intake port formed in the first scroll. The volume of the gas to be compressed is controlled by changing the length of the super-discharging tube.

Abstract: A scroll compressor comprises a driving scroll, a driven scroll combined with the driving scroll to be driven by the same through the mutual contact of the wrap plates of the both scrolls, a movable bearing support held in a sealing container so as to be movable in the axial and radial directions of the container. The movable bearing support supports the driven scroll so that the driven scroll is pushed in the radial direction of the container, whereby gaps formed between the wrap plates of the driving and driven scrolls can be avoided.

Abstract: A scroll type positive displacement apparatus which can be used as a vacuum pump is disclosed. A pair of interfitting scrolls are housed in a first container which communicates with a vacuum chamber to be evacuated by the pump. The scrolls are rotated in synchrony about parallel, nonaligned axes by a drive motor. The scrolls define a plurality of spiral compression chambers which change in size when the scrolls are rotated, compressing a gas contained in the compression chambers. The shaft of one of the scrolls has a discharge port formed therein which communicates between the centermost compression chamber and the inside of a second container which adjoins the first container. The second container is partially filled with lubricating oil and communicates with the atmosphere. The discharge port is equipped with a check valve which permits compressed gas to enter the second container from the scrolls but prevents gas from flowing in the opposite direction.

Abstract: A scroll-type positive displacement apparatus which can be used as a vacuum pump is disclosed. A pair of interfitting scrolls are housed in a first container which communicates with a vacuum chamber to be evacuated by the pump. The scrolls are rotated in synchrony about parallel, nonaligned axes by a drive motor. The scrolls define a plurality of spiral compression chambers which change in size when the scrolls are rotated, compressing a gas contained in the compression chambers. The shaft of one of the scrolls has a discharge port formed therein which communicates between the centermost compression chamber and the inside of a second container which adjoins the first container. The second container is partially filled with lubricating oil and communicates with the atmosphere. The discharge port is equipped with a check valve which permits compressed gas to enter the second container from the scrolls but prevents gas from flowing in the opposite direction.

Abstract: A scroll compressor comprising a driving scroll and a driven scroll which is combined with the driving scroll and is driven by the driving scroll through an Oldham's coupling, a partition plate fixed to a container for housing the structural elements such as scrolls and having a supporting pin provided at a position near the inner wall of the container, a movable bearing support which is placed below the partition plate and is engaged with the supporting pin so as to be swingable around the supporting pin, and which supports the driven scroll through a bearing, and a rotation controlling structure which causes a swinging movement of the movable bearing support around the supporting pin along with a driven scroll whereby the distance between the axial centers of said driving and driven scrolls is changed.

Abstract: In a scroll compressor for compressing gas by the relative orbital movement between first and second scrolls which combined with each other to form a compression chamber therebetween and a super-charging tube is connected to an intake port formed in the first scroll. The volume of the gas to be compressed is controlled by changing the length of the super-discharging tube.

Abstract: In a scroll type compressor, the shaft of a driven scroll is rotatably supported in a sealing container so that the axis of rotation of the driven scroll shaft is deviated from the axis of rotation of a driving scroll; the wrap plates of the driving and driven scrolls are mutually combined with each other so that the parts of the side surface of the wrap plates come in contact with each other to form a compression chamber; and the driven scroll is directly driven by the driving scroll in synchronism therewith, whereby the function of compression of a fluid is obtainable during the movement of the compression chamber toward the centers of the driving and driven scrolls.

Abstract: A scroll type fluid transferring machine for sucking, compressing and discharging a fluid comprises a first scroll having a first wrap plate, a second scroll having a second wrap plate which is opposed to and combined with the first scroll, a first motor having a rotary shaft which is connected to the first scroll so as to be in agreement with its center of rotation, and a second motor having a rotary shaft which is connected to the second scroll so as to be in agreement with its center of rotation.

Abstract: A scroll compressor comprises a driving scroll and a driven scroll which is combined with the driving scroll and is driven by the driving scroll through an Oldham's coupling, a partition plate fixed to a container for housing the structural elements such as scrolls and having a supporting pin provided at a position near the inner wall of the container, a movable bearing support which is placed below the partition plate and is engaged with the supporting pin so as to be swingable around the supporting pin, and which supports the driven scroll through a bearing, and a rotation controlling means which causes a swinging movement of the moveable bearing support around the supporting pin along with the driven scroll whereby the distance between the axial centers of said driving and driven scrolls is changed.

Abstract: A refrigerating cycle apparatus of an improved operating efficiency, which is constructed, in combination, with: a refrigerant circuit including an evaporator, a compressor, a condenser, a first throttle, an economizer for separating the refrigerant into a gas phase and a liquid phase, and a second throttle, all these component elements being interconnected in the order as mentioned; and a piping for the economizer, which connects the gas phase portion of the economizer and an intermediate pressure region of the compressor, wherein the length of the economizer is set in such a value that is greater than the values to be determined from a Mollier's diagram on the basis of the operating conditions for the refrigerating cycle apparatus for the increase in the cooling or warming capability as well as the increase in the coefficient of performance.

Abstract: An upper housing for rotatably supporting a driving scroll in a sealing container is provided with an annular chamber to be maintained at the atmospheric pressure. The annular chamber is communicated with a compression chamber formed between the driving and driven scrolls through a discharge conduit which is formed in the driving shaft of the driving scroll. The annular chamber is communicated with the inside of the container through a throttling path. An oil stored in the lower part of the container is induced with the compression chamber during the revolution of the both scrolls to be introduced into the annular chamber. Owing to the throttling path, the oil is stored in the annular chamber to separate the inside of the container and the annular chamber kept at the atmospheric pressure.

Abstract: A scroll-type apparatus having a main journal bearing which journals the drive shaft of the apparatus and is capable of pivoting by small angles with two degrees of freedom. The main journal bearing comprises three or more arcuate pads whose inner surfaces journal the drive shaft and which are pivotably supported by a stationary main bearing housing. In a preferred embodiment, each of the pads has a spherical protrusion and two rotation-preventing pins secured to its back surface. The protrusions contact the inner surface of the main bearing housing and pivotably support the pads, while the rotation-preventing pins are inserted into grooves formed on the inner surface of the main bearing housing.

Abstract: A scroll type hydraulic machine having an improved thrust bearing structure, whereby the thrust bearing is capable of tilting radially and peripherally. The thrust bearing is preferably composed of at least three sectors, and an anti-rotation member is provided between adjacent ones of the sectors. A bearing support is provided, a portion of which has the form of a ball. The thrust bearing is surrounded by an annular portion whose height is substantially the same as that of the thrust bearing.

Abstract: A scroll-type fluid machine, preferably, a scroll-type compressor, having a small size and improved sealing between scroll members. An orbiting scroll is interleaved with a stationary scroll. A crank mechanism is provided for causing the orbiting scroll to undergo an orbiting motion. The crank mechanism includes a crankshaft and an eccentric ring rotated in an eccentric pattern by the crankshaft. Orbital movement of the orbiting scroll is transmitted from the eccentric ring to a shaft of the orbiting scroll. The distance between the center of rotation of the crankshaft and the center of the orbiting scroll shaft is made substantially equal to the radius of orbit when the center of rotation of the crankshaft, the center of the orbiting scroll shaft, and the center of rotation of the eccentric ring are arranged along a straight line in the stated order.

Abstract: A scroll-type hydraulic machine having a first stationary scroll with a first scroll wrap, a first orbiting scroll with a second scroll wrap on one surface thereof interleaved with the first scroll wrap, a first orbiting scroll shaft on the other surface of the first orbiting scroll, a second stationary scroll having a third scroll wrap, a second orbiting scroll having a fourth scroll wrap on one surface interleaved with the third scroll wrap, a second orbiting scroll shaft provided on the other surface of the second orbiting scroll, and a crank mechanism. The crank mechanism includes a rotatably driven crankshaft having an eccentric through-hole extending lengthwise therethrough, an eccentric shaft rotatably supported by bearings in the eccentric through-hole, and first and second eccentric ring mechanisms. Each eccentric ring mechanism is provided at one end of the eccentric shaft and is rotatable with respect thereto.

Abstract: A turbine includes a plurality of blades mounted on a rotary pedestal such that the pedestal is rotatable in the same direction regardless of the direction of flow. Conversion efficiency is improved by generally locating the zero lift plane of the blades on a cylindrical or conical surface coaxial with the rotary output.

Abstract: A scroll-type hydraulic machine, particularly, a compressor, in which thrust flows acting on a pair of orbiting scrolls cancel one another, thereby improving the reliability of the machine. The hydraulic machine includes first and second fluid volume changing mechanisms, each of which has a stationary scroll and an orbiting scroll assembled together such that fluid introduced between the wraps of the two scrolls is reduced in volume and discharged. A crank mechanism including a crankshaft having an eccentric through-hole extending therethrough has a first crank portion at one end for rotatably supporting a shaft of the orbiting scroll of the first fluid volume changing mechanism and a second crank portion at the other end thereof rotatably supporting the orbiting scroll of the second fluid volume changing mechanism. A thrust-cancelling shaft is disposed in the eccentric through-hole supporting at the opposed ends thereof the orbiting scrolls of the first and second fluid volume changing mechanisms.