A compressor may include a shell, first and second scrolls, a seal assembly, a modulation control chamber, and a modulation control valve. The first scroll may include a first end plate having a biasing passage extending therethrough. The seal assembly may isolate a discharge pressure region from a suction pressure region. The seal assembly and the first scroll may define an axial biasing chamber therebetween that communicates with the axial biasing chamber and a first pocket between the first and second scrolls. The modulation control chamber may be fluidly coupled with the biasing chamber by a first passage. The modulation control valve may be fluidly coupled with the modulation control chamber by a second passage and movable between a first position allowing communication between the second passage and the suction pressure region and a second position restricting communication between the second passage and the suction pressure region.

An electric refrigerant drive, in particular a refrigerant compressor for an air conditioner of a motor vehicle, has an electric motor drive module and a compressor module coupled to the drive module. The drive module has a motor housing which houses an electric motor with a rotatable motor shaft and is joined to an end shield. The drive module also comprises a fluid-tight housing partition opposite the end shield, thereby forming an electronic housing that receives an electronic motor unit and is closed by a housing cover. The compressor module has a compressor housing which is attached to the end shield of the motor housing of the drive module and which receives a compressor part that is coupled or can be coupled to the drive module so as to be driven.

A compressor includes a shell assembly and a compression mechanism disposed within the shell assembly. The shell assembly includes first and second end caps. A suction chamber is disposed within the shell assembly between the first end cap and the second end cap. A discharge chamber and oil sump may be disposed within the shell assembly. The shell assembly includes at least one suction opening into the suction chamber. A distributor is in communication with one of the suction openings. Plugs may sealingly engage another one of the suction openings. The distributor includes an inlet path and first and second outlet paths. A suction line is coupled to the inlet path. The suction line includes at least first and second portions. A first plane bisecting the second portion along a length of the second portion is perpendicular to a second plane that bisects the first and second outlet paths.

A scroll compressor includes a movable scroll having first key grooves, a stationary member having second key grooves, and an Oldham coupling provided between the movable scroll and stationary member. The Oldham coupling is movable with respect to the stationary member along a first axis, and with respect to the movable scroll along a second axis. The Oldham coupling has an annular body portion, at least two first key portions fitted into the first grooves, and a pair of second key portions fitted into the second grooves. The first horizontal surface has inwardly positioned surfaces positioned more on a center of gravity side of the Oldham coupling than virtual extension lines of first inner peripheral edges that are part of an inner peripheral edge of the annular body portion. The first key portions have inwardly positioned portions that project from the inwardly positioned surfaces.

A scroll compressor includes a crank shaft, an orbiting scroll, and a frame. The crank shaft has a lubricant channel. The orbiting scroll has an inner channel and a lubricant channel groove. The inner channel allows the lubricant supplied through the crank shaft to flow outward. The lubricant channel groove has an annular shape and allows the lubricant supplied through the inner channel to be supplied to the thrust surface. The lubricant channel groove is formed such that the lubricant channel groove stays within a region of the thrust surface while the orbiting scroll is orbiting.

A bearing carrier is provided. The bearing carrier including: a bearing body of a first material having a shaft-receiving aperture and a bridge land with a finger cut to channel fluid pressurized by intermeshing of gears rotatably supported by the bearing carrier into an outlet defined by a housing enveloping the bearing carrier, wherein the bearing body includes a bearing face configured to be in a facing spaced relationship with the gears, wherein the bearing face includes a second material integral with the first material, wherein at least one of the first material and the second material define a portion of the bearing face of the bearing body extending about the shaft-receiving aperture, the portion of the bearing face excluding the bridgeland.

A scroll compressor includes a fixed scroll including a fixed scroll lap, and a movable scroll including a movable scroll lap. A first scroll lap is one of the fixed scroll lap and the movable scroll lap. A second scroll lap is an other of the fixed scroll lap and the movable scroll lap. A second thickness of the second scroll lap is larger than a first thickness of the first scroll lap. A first side face gap is formed between an inner line of the first scroll lap and an outer line of the second scroll lap. A second side face gap is formed between an outer line of the first scroll lap and an inner line of the second scroll lap. The second side face gap is larger than the first side face gap.

A rotary fluid transmission device contains: a rotor, a drive shaft, a first holder, and a second holder. The first holder includes a circular bush and an annular chamber. The rotor includes a C-shaped piston which has an external face and an internal face. In addition, the annular chamber has a first reservoir defined between the internal face and the circular bush, and the annular chamber has a second reservoir defined between the external face and the inner fringe. The circular seat includes two clamp arms, and a respective clamp arm is rotatably engaged with a blade. The blade includes two abutting faces, and the C-shaped piston has two edge faces. The first holder includes two first conduits and two second conduits, the two first conduits are in communication with the first reservoir, and the two second conduits are in communication with the second reservoir.

A reversible gerotor pump system is provided. The gerotor pump system includes a cylindrical housing with a 180 slot, an eccentric ring with a locking pin fixed thereto and movably engaged in the slot; an outer rotor and inner rotor with meshed teeth, and shaft for driving inner rotor and system. The eccentric ring has a convex profile on the outer diameter. A positive contact system, which can be a spring-and-plunger system or frictional disc brake system is provided to increase frictional force between the eccentric ring and the outer rotor. The locking pin moves in the slot with clearance at both rotation directions to provide a self-damping effect. The suction port has prolongations at both upstream and the downstream sides to increase filling time such that the pump can have a fill speed of above 5000 rpm, and the volumetric efficiency is at least 90% at 5000 rpm.

An outer gear and an inner gear expand and contract volume of pump chambers formed between both the gears, and rotate to suction fuel into the pump chambers and then discharge fuel from the pump chambers sequentially. The inner gear includes an insertion hole that is depressed along its axial direction. A joint member includes a main body portion that is fitted to a rotary shaft, a foot portion that extends from the main body portion along the axial direction and is inserted in the insertion hole with a clearance therebetween, and a protruding portion that protrudes from the foot portion toward a rotation progress side of the inner gear and has its width in the axial direction further narrowed toward a top portion of the protruding portion.