Abstract: A scroll-type apparatus having an improved radial seal and a method for the assembly thereof is disclosed. The spiral wrap of a moving scroll and a stationary scroll are provided with gap adjusting means for providing a gap of a desired size between the top surface of the spiral wrap of each scroll and the top surface of the base plate of the opposing scroll. The gap adjustment means comprises a spiral-shaped elastic element which fits into a groove formed in the top surface of a spiral wrap or on top of a protrusion formed on the top surface of the spiral wrap, to form a nonpressurized seal. The elastic element is supported by the spiral wrap by friction, bonding, or solvent welding.

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 fluid transferring machine comprises a stationary scroll member and an oscillatable scroll member, each of which has a spiral wrap of an involute curve or other curves projecting from a base plate and which cooperate to form a compression chamber between the spiral wraps and the base plates by mutually fitting one into the other, an oscillatable scroll shaft provided on the surface of the base plate at the position opposite the spiral wrap of the oscillatable scroll member, a crank shaft having an eccentric recess having its axis which is shifted by a predetermined distance from the axis of the crank shaft, wherein a cylindrical bush having the coaxial outer and inner circles is loosely fitted in the eccentric recess of the crank shaft with a gap between the outer circumference of the bush and the inner wall of said eccentric recess, and the shaft of the oscillatable scroll member is fitted in the inner circumference of the bush in a freely rotatable manner.

Abstract: A scroll-type compressor including stationary and orbiting scrolls housed in a shell. A first frame, also housed in the shell, receives a portion of the orbiting scroll. The stationary scroll is fixed to the first frame, and a second frame is further mounted in the shell. A balancer chamber is formed between the first and second frames. A main shaft having a balancer is housed in the balancer chamber rotatably. The main shaft includes an enlarged diameter portion on one end of the shaft which is attached to the orbiting scroll and a small diameter portion on the end of the shaft which is attached to the orbiting scroll and extending between the first frame and the second frame for driving the orbiting scroll. A first bearing is disposed between the main shaft in the first frame for supporting the main shaft at a position between the orbiting scroll end of the shaft.

Abstract: A scroll-type compressor including stationary and orbiting scrolls housed in a shell. A first frame, also housed in the shell, receives a portion of the orbiting scroll. The stationary scroll is fixed to the first frame, and a second frame is further mounted in the shell. A balancer chamber is formed between the first and second frames. A main shaft having a balancer is housed in the balancer chamber rotatably. The main shaft includes an enlarged diameter portion on one end of the shaft which is attached to the orbiting scroll and a small diameter portion at the opposite end of the shaft, said shaft extending between the first frame and the second frame for driving the orbiting scroll. A first bearing is disposed between the main shaft and the first frame for supporting the main shaft at a position at the orbiting scroll end of the shaft. A second bearing is disposed between the main shaft and the second frame for supporting the main shaft at a position proximate the opposite end of the shaft.

Abstract: A scroll-type compressor including stationary and orbiting scrolls housed in a shell. A first frame, also housed in the shell, receives a portion of the orbiting scroll. The stationary scroll is fixed to the first frame, and a second frame is further mounted in the shell. A balancer chamber is formed between the first and second frames. A main shaft having a balancer is housed in the balancer chamber rotatably. The main shaft includes an enlarged diameter portion on one end of the shaft which is attached to the orbiting scroll and a small diameter portion on the end of the shaft which is attached to the orbiting scroll and extending between the first frame and the second frame for driving the orbiting scroll. A first bearing is disposed between the main shaft in the first frame for supporting the main shaft at a position between the orbiting scroll end of the shaft.

Abstract: A throttle portion is formed in an intake port in a stationary scroll member to suppress an abnormal pressure rise which may take place when a refrigerant is sucked in the intake port, and a communication hole for communicating a low pressure space in a shell with a space inside an oldham's coupling, the inner space being formed by a recess of a bearing frame, the outer peripheral wall of the base plate of an oscillatable scroll member and the side surface of the wrap of the stationary scroll member.

Abstract: A scroll compressor, such as may be used for a refrigeration compressor, having improved lubrication of bearing parts and sliding surfaces is disclosed. In accordance with the invention, the various components of the compressor, including both the orbiting and stationary scrolls and their driving components, are located in a housing, and lubrication passages are formed therein, such that an ample supply of lubricant is supplied to all bearing and sliding parts for all operating states of the compressor.

Abstract: A scroll-type pumping apparatus comprising a stationary scroll 1, an orbiting scroll 2 and a drive shaft 6 driving the orbiting scroll. A bottom end portion of the drive shaft is dipped in oil in a basin 150 formed at the bottom side of the apparatus. A compartment plate 30 is arranged between the basin and a motor 10 and 11 driving the drive shaft. Flow preventing means allows flow only in the direction from an upper side to a lower side of the compartment plate.

Abstract: A scroll having flow passages constructed so as to provide improved lubricating properties while eliminating excessive consumption of oil. First flow paths have upper ends communicating with a motor chamber formed between the frame of the compressor and an upper portion of the electric motor which drives the compressor, and lower ends which open above an oil pool formed in the lower part of the housing of the compressor. The first flow paths extend in the axial direction of the compressor between the outer wall of the motor and the frame so that all or part of the gas which is sucked into the motor chamber can flow downwardly. Second axially extending flow paths are provided extending in the axial direction of the compressor between the frame and the shell with the gas passing through the first flow paths being caused to change its direction of flow near the lower end of the frame to flow upwardly.

Abstract: A scroll-type pumping apparatus comprising a stationary scroll 1, an orbiting scroll 2 attached to an orbiting scroll shaft 4, and a crankshaft 14. An eccentric hole is formed in the end of the crankshaft and an eccentric bearing 26 rotates within this eccentric hole. The eccentric bearing has a central aperture eccentric to the bearing's outer circumference in which the orbiting scroll shaft is placed and freely rotates.

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 compressor having an improved sealing arrangement. Ends of scroll wraps opposite end plates are formed with grooves extending longitudinally along their spiral surfaces. Spring members are fitted into lower portions of these grooves, and tip seals in the upper portions, opposite and in contact with the end plate of the opposite scroll. In one embodiment, the grooves are divided by partitions into segments and separate springs are disposed in each segment. In another embodiment, the springs have a zig-zag shape.

Abstract: A scroll compressor in which depletion of the lubricant supply is prevented both during the normal operation of the compressor and at the time the compressor is started. A motor cover having the form of a bottomed cylinder is provided around a driving motor of the compressor at a position so as to separate the path of suctioned gas which is used for cooling the driving motor from a lubricant return path through which lubricant from the lubricant pool formed at the bottom of the housing of the compressor is pumped to lubricate the bearing frame and returned to the lubricant pool. A check valve may be provided within the motor cover.

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 compressor of the scroll type which includes a compression part and a motor to drive it, both received within a shell at upper and lower portions thereof, respectively, the compression part including a stationary and a movable scroll each having a convolute shape and associated with each other so as to form compression chambers therebetween, and disposed within the shell between the compression part and the motor is a frame that is formed therein with a hollow space in communication with a suction pipe which is arranged so as to pass through the shell, the hollow space being in communication through the air gap of the motor with a space formed within the shell below the motor, which is in turn in communication with the suction port of the compression part through the space formed between the motor and the shell and the passages formed in the frame.