Abstract: A scroll compressor includes two scroll bodies each having a scroll rib. The scroll ribs engage each other to form at least one compression chamber. The scroll compressor further comprises a drive shaft for driving a moveable scroll body of the two scroll bodies. The moveable scroll body includes a base plate which has two opposing sides. On a first side of the two opposing sides, the scroll rib is arranged, and on a second side of the two opposing sides a hub is arranged. The hub has a receiving portion for a drive section of the drive shaft. The moveable scroll body has at least one passage from an interior of the receiving portion to a hub environment located around the hub at the second side of the two opposing sides.

Abstract: A scroll compressor is provided, the scroll compressor comprises two scroll bodies each having a scroll rib and the scroll ribs engage each other to form at least one compression chamber, and the scroll compressor further comprises a drive shaft for driving a moveable scroll body of the two scroll bodies, wherein the moveable scroll body comprises a base plate which has two opposing sides, wherein on a first side of the two opposing sides the scroll rib is arranged and on a second side of the two opposing sides a hub is arranged, the hub comprising a receiving portion for a drive section of the drive shaft, and wherein the moveable scroll body comprises at least one passage from an interior of the receiving portion to a hub environment located around the hub at the second side of the two opposing sides.

Abstract: A compressor (20) has a case (22) and a crankshaft (38). The case has a number of cylinders (30-32). For each of the cylinders, the compressor includes a piston (34) mounted for reciprocal movement at least partially within the cylinder. A connecting rod (36) couples each piston to the crankshaft. A pin (44) couples each connecting rod to the associated piston. Each pin has first (52) and second (53) end portions mounted to first (56) and second (57) receiving portions of the associated piston and a central portion (48) engaging the associated connecting rod. For each of the pistons a pair of first and second at least partially non-metallic plugs have respective stems received in the pin first and second end portions and respective heads facing a wall surface of the associated cylinder.

Abstract: A compressor (20) has a case (22) and a crankshaft (38). The case has a number of cylinders (30-32). For each of the cylinders, the compressor includes a piston (34) mounted for reciprocal movement at least partially within the cylinder. A connecting rod (36) couples each piston to the crankshaft. A pin (44) couples each connecting rod to the associated piston. Each pin has first (52) and second (53) end portions mounted to first (56) and second (57) receiving portions of the associated piston and a central portion (48) engaging the associated connecting rod. For each of the pistons a pair of first and second at least partially non-metallic plugs have respective stems received in the pin first and second end portions and respective heads facing a wall surface of the associated cylinder.

Abstract: A compressor (20) has a case (22) and a crankshaft (38). The case has a number of cylinders (30-32). For each of the cylinders, the compressor includes a piston (34) mounted for reciprocal movement at least partially within the cylinder. A connecting rod (36) couples each piston to the crankshaft. A pin (44) couples each connecting rod to the associated piston. Each pin has first (52) and second (53) end portions mounted to first (56) and second (57) receiving portions of the associated piston and a central portion (48) engaging the associated connecting rod. For each of the pistons a pair of first and second at least partially non-metallic plugs have respective stems received in the pin first and second end portions and respective heads facing a wall surface of the associated cylinder.

Abstract: A compressor (20) has a case (22) and a crankshaft (38). The case has a number of cylinders (30-32). For each of the cylinders, the compressor includes a piston (34) mounted for reciprocal movement at least partially within the cylinder. A connecting rod (36) couples each piston to the crankshaft. A pin (44) couples each connecting rod to the associated piston. Each pin has first (52) and second (53) end portions mounted to first (56) and second (57) receiving portions of the associated piston and a central portion (48) engaging the associated connecting rod. For each of the pistons a pair of first and second at least partially non-metallic plugs have respective stems received in the pin first and second end portions and respective heads facing a wall surface of the associated cylinder.

Abstract: A compressor (22) has: a case (32) defining: a first cylinder bank (70) having a plurality of cylinders (76, 77); a cylinder head (100); a suction port (26); a discharge port (28); and an economizer port (30); a plurality of pistons, each individually associated with a respective one of the cylinders; and a crankshaft (202) held by the case for rotation about a crankshaft axis and coupled to the pistons. The first cylinder bank cylinder head is divided into: a first suction chamber (130); a second suction chamber (132); and a single discharge chamber (128). The first cylinder bank first suction chamber is coupled to the suction port. The first cylinder bank second suction chamber is coupled to the economizer port. The first cylinder bank discharge chamber is coupled to the discharge port.

Abstract: A compressor valve plate (80) for a reed valve (94) has a mounting surface portion for mounting a base portion (104) of a reed (100). The compressor has a port (90). A seat (150) surrounds the port. A trepan (154) surrounds the seat. A relieved area (180, 182) less deep than the trepan extends proximally (182) of and distally (180) of the trepan. A reciprocating piston compressor comprises a valve assembly having such a compressor valve plate and a reed.

Abstract: A compressor (20) has a case (22) and a crankshaft (38). The case has a number of cylinders (30 32). For each of the cylinders, the compressor includes a piston (34) mounted for reciprocal movement at least partially within the cylinder. A connecting rod (36) couples each piston to the crankshaft. A pin (44) couples each connecting rod to the associated piston. Each pin has first (52) and second (53) end portions mounted to first (56) and second (57) receiving portions of the associated piston and a central portion (48) engaging the associated connecting rod. For each of the pistons a pair of first and second at least partially non metallic plugs have respective stems received in the pin first and second end portions and respective heads facing a wall surface of the associated cylinder.

Abstract: A compressor (20) comprises: a case (22); and at least one piston (40) mounted for reciprocating movement, each in a respective cylinder (42) of the case. The at least one piston having a peripheral surface (50) and an upper surface (52), the upper surface having an outer portion (54) and a projection (80) extending from the upper surface. The at least one piston has a channel (220) positioned to pass flow from an area above the outer portion.

Abstract: A compressor (20) comprises: a case (22); and at least one piston (40) mounted for reciprocating movement, each in a respective cylinder (42) of the case. The at least one piston has a peripheral surface (50) and an upper surface (52). At least one discharge valve comprises: a valve element (150) shiftable between a closed condition and an open condition; a valve guide (170); one or more springs (180) held at least partially the valve guide biasing the valve element from the open condition toward the closed condition; and one or more vents (300) in the valve guide providing a flow path from a region above the valve element upward through the valve guide.

Abstract: A compressor (22) has: a case (32) defining: a first cylinder bank (70) having a plurality of cylinders (76, 77); a cylinder head (100); a suction port (26); a discharge port (28); and an economizer port (30); a plurality of pistons, each individually associated with a respective one of the cylinders; and a crankshaft (202) held by the case for rotation about a crankshaft axis and coupled to the pistons. The first cylinder bank cylinder head is divided into: a first suction chamber (130); a second suction chamber (132); and a single discharge chamber (128). The first cylinder bank first suction chamber is coupled to the suction port. The first cylinder bank second suction chamber is coupled to the economizer port. The first cylinder bank discharge chamber is coupled to the discharge port.

Abstract: A multi-stage reciprocating compressor includes a cylinder block and a cylinder head. The cylinder block defines a low stage cylinder and a high stage cylinder. The cylinder head is secured to the cylinder block overlying the low and high stage cylinders. The cylinder head defines a mid-stage plenum which is in fluid communication with the low stage cylinder and the high stage cylinder for communicating a working fluid discharged from the low stage cylinder to the high stage cylinder.

Abstract: A magnetic drive coupling apparatus is provided and includes a drive unit having a first rotatable shaft and an open drive assembly, a driven unit having an end face and a second rotatable shaft extending through the end face axially overlap, a magnetic drive coupling having first and second magnetically attractive parts associated with the first and second rotatable shafts, respectively, which transmits rotation between the first and second rotatable shafts and a sealing unit coupled to the end face to encompass the second magnetically attractive part and to hermetically seal oil and refrigerant in an interior of the driven unit.

Abstract: A compressor valve plate (80) for a reed valve (94) has a mounting surface portion for mounting a base portion (104) of a reed (100). The compressor has a port (90). A seat (150) surrounds the port. A trepan (154) surrounds the seat. A relieved area (180, 182) less deep than the trepan extends proximally (182) of and distally (180) of the trepan. A reciprocating piston compressor comprises a valve assembly having such a compressor valve plate and a reed.

Abstract: A compressor (20) has a case (22) and a crankshaft (38). The case has a number of cylinders (30 32). For each of the cylinders, the compressor includes a piston (34) mounted for reciprocal movement at least partially within the cylinder. A connecting rod (36) couples each piston to the crankshaft. A pin (44) couples each connecting rod to the associated piston. Each pin has first (52) and second (53) end portions mounted to first (56) and second (57) receiving portions of the associated piston and a central portion (48) engaging the associated connecting rod. For each of the pistons a pair of first and second at least partially non metallic plugs have respective stems received in the pin first and second end portions and respective heads facing a wall surface of the associated cylinder.

Abstract: A compressor (20) has a case (22) and a crankshaft (38). The case has a number of cylinders (30, 32). For each of the cylinders, the compressor includes a piston (34) mounted for reciprocal movement at least partially within the cylinder. A connecting rod (36) couples each piston to the crankshaft. An electric motor compartment (50) of the case has a stator (42) and a rotor (40). The rotor is mounted to the crankshaft. The case has a wall (56) between the motor compartment and a crankcase compartment/sump (52). The wall bears a feature (120, 132; 420; 460) for coalescing oil entrained in a refrigerant flow (522), which flow exits the gap (90) between the rotor and the stator to prevent the oil from entering the cylinders.

Abstract: A reciprocating piston compressor for use in a refrigerant compression circuit comprises first and second intake manifolds, first and second reciprocating piston compression units, an outlet manifold and a first pulsing valve. The intake manifolds segregate inlet flow into the compressor. The first and second reciprocating piston compression units receive flow from the first and second intake manifolds, respectively. The outlet manifold collects and distributes compressed refrigerant from the compression units. The first pulsing valve is mounted externally of the first intake manifold to regulate refrigerant flow into the first intake manifold. In another embodiment, a second valve is mounted externally of the second intake manifold to regulate flow into the second intake manifold, and the first and second valves are operated by a controller. The controller activates the first valve with variable width pulses having intervals less than an operating inertia of the refrigerant compression circuit.

Abstract: A magnetic drive coupling apparatus is provided and includes a drive unit having a first rotatable shaft and an open drive assembly, a driven unit having an end face and a second rotatable shaft extending through the end face axially overlap, a magnetic drive coupling having first and second magnetically attractive parts associated with the first and second rotatable shafts, respectively, which transmits rotation between the first and second rotatable shafts and a sealing unit coupled to the end face to encompass the second magnetically attractive part and to hermetically seal oil and refrigerant in an interior of the driven unit.

Abstract: A compressor (20) has a case (22) and a crankshaft (38). The case has a number of cylinders (30, 32). For each of the cylinders, the compressor includes a piston (34) mounted for reciprocal movement at least partially within the cylinder. A connecting rod (36) couples each piston to the crankshaft. An electric motor compartment (50) of the case has a stator (42) and a rotor (40). The rotor is mounted to the crankshaft. The case has a wall (56) between the motor compartment and a crankcase compartment/sump (52). The wall bears a feature (120, 132; 420; 460) for coalescing oil entrained in a refrigerant flow (522), which flow exits the gap (90) between the rotor and the stator to prevent the oil from entering the cylinders.