A compressor includes a cylinder block having a first bore and a cylinder head overlapping the cylinder block. The cylinder head has a second bore aligned with the first bore. The second bore is separated into a plurality of distinct regions including a suction region and an economizer region. A plurality of valves includes a suction valve selectively operable to fluidly couple the suction region and the first bore, and an economizer valve selectively operable to fluidly couple the economizer region and the first bore.

A sealing arrangement (40) is provided for sealing an interface between a casing main body (12) and a casing end cover (16). A circumferential lip (42) on the casing main body (12) defines a first radially facing circumferential surface (46) and the end cover (16) has a circumferential lip (50) defining a second radially facing circumferential surface (52). The sealing arrangement (40) includes a first circumferentially extending groove (55) formed in one of the first and second circumferential surfaces (46,52) and a sealing member (56) disposed within the first groove (55) in sealing contact with the one of said first groove (55) and in sealing contact with the other one of the first and second circumferentially extending surfaces (46,52).

A reciprocating compressor (10) comprises a casing (11), inside which two chambers are defined, respectively a first chamber (12) corresponding to the compression section, which, in turn, comprises at least one piston (16), a slider-crank mechanism (17) and an oil box, and a second chamber (13) for the motor (14) of the compressor. A transmission shaft (18) is provided, operatively connected to said motor and to said slider-crank mechanism. Said chambers are separated by means of a supporting portion (19) of said shaft, said supporting portion having a passage (20) for said shaft, wherein at least one anti-friction bushing (21) is provided in said passage for supporting said shaft. An oil supply duct (22) is provided at least partially inside said shaft, wherein the duct (22) has at least an end opening (23, 25) exiting in the space between said shaft and said passage so as to allow the lubrication of said at least one anti-friction bushing and said shaft. A niche (24, 26) is provided between the end of said passage (20) facing said second chamber (13) and said end opening (23, 25) of said duct. A discharge channel (27) is operatively connected to said niche and to said oil box, so that the oil lubricating the anti-friction bushing (21) and coming from the end opening is depressurized and adapted to come back into said oil box, thus eliminating or limiting the amount of oil reaching the second chamber with the motor.

A hermetic compressor may include a crankshaft having an input shaft rotatably supported on the cast-iron block along the crankshaft axis and connected to the electric motor rotary output, and an eccentric crankpin orbitally rotating about the axis as the crankshaft is rotated. A pair of opposed pistons may lie on the common plane. Each piston may be pivotably connected to one of the connecting rod piston ends to drive the pistons in an oscillatory manner within the cylinders as the crankshaft rotates. The piston and cylinder pairs may cause fluid to be pumped from the inlet port to the outlet port as the piston oscillates varying the volume of the enclosed space bound by the piston and the cylinder pairs.

A compressor assembly includes a compressor having a cylinder and a connecting rod in a connecting rod plane. The connecting rod includes a compressor piston and a connecting rod bearing. The compressor assembly includes a drive having an axis of rotation, a drive shaft, and a housing. The drive shaft is mounted in a drive shaft bearing and has a connecting rod side end and a connecting rod remote end. The drive shaft has a connecting-rod receiving portion which is arranged eccentrically to the axis of rotation of the drive at the connecting rod side end.

A compressor having curved connecting rods, comprising cylinders (8), pistons (9), piston pins (10), curved connecting rods (11), a swing rod (12), a crank pin (13), a crankshaft (14) and the other components; when the compressor having curved connecting rods works, a power machine driving the crankshaft (14) to rotate, the rotation of the crankshaft (14) driving the crank pin (13) to push the swing rod (12) to swing left and right, and the movement, towards the left and right, of the swing rod (12) driving the curved connecting rods (11) and the pistons (9) to reciprocate within the cylinders (8) and perform work in a compression manner.

A hermetic compressor may include a crankshaft having an input shaft rotatably supported on the cast-iron block along the crankshaft axis and connected to the electric motor rotary output, and an eccentric crankpin orbitally rotating about the axis as the crankshaft is rotated. A pair of opposed pistons may lie on the common plane. Each piston may be pivotably connected to one of the connecting rod piston ends to drive the pistons in an oscillatory manner within the cylinders as the crankshaft rotates. The piston and cylinder pairs may cause fluid to be pumped from the inlet port to the outlet port as the piston oscillates varying the volume of the enclosed space bound by the piston and the cylinder pairs.

A compressor having curved connecting rods, comprising cylinders (8), pistons (9), piston pins (10), curved connecting rods (11), a swing rod (12), a crank pin (13), a crankshaft (14) and the other components; when the compressor having curved connecting rods works, a power machine driving the crankshaft (14) to rotate, the rotation of the crankshaft (14) driving the crank pin (13) to push the swing rod (12) to swing left and right, and the movement, towards the left and right, of the swing rod (12) driving the curved connecting rods (11) and the pistons (9) to reciprocate within the cylinders (8) and perform work in a compression manner.

A compressor assembly for a compressed air feed of a compressed air supply system includes a compressor having a cylinder and a connecting rod in a connecting rod plane. The at least one connecting rod includes a compressor piston and a connecting rod bearing. The compressor assembly further includes a drive having an axis of rotation, a drive shaft, and a housing. The drive shaft is mounted in a drive shaft bearing and has a connecting rod side end and a connecting rod remote end. The drive shaft has a connecting-rod receiving portion which is arranged eccentrically to the axis of rotation of the drive at the connecting rod side end. The drive shaft bearing and the connecting rod bearing are arranged such that the drive shaft bearing is situated at least partially within the connecting rod bearing in a radial direction.

A reciprocating piston compressor (100) includes a crank casing (10). The reciprocating piston compressor (100) includes a crankshaft (11), a piston rod (12) and a crosshead (13). The crosshead (13) and the piston (23) are actively connected to one another by way of a connecting rod (24). The connecting rod (24) is fixedly restrained on the crosshead (13) and on the piston (23).