In a variable displacement compressor 100, transmitting member 116 transmits rotational motion of rotor 112 to swash plate 111 and supports swash plate 111. Guide member 117 guides inclining motion of swash plate 111 such that a top dead center position of piston 126 is maintained to be substantially constant. Members 116, 117 are separately formed at different portions on a rotor end face 112a. In the variable displacement compressor 100, first contacted member 118 contacted with transmitting member 116, and second contacted member 119 contacted with guide member 117, are separately formed at different portions on swash plate end face 111b. The transmitting member 116 and the first contacted member 118 extend on rotor 112 and swash plate 111, respectively, from a top dead center side region V1 to a bottom dead center side region V2 of the piston.

A variable capacity swash plate type compressor includes: a cylinder block forming a plurality of cylinder bores; a first housing connected to the cylinder block and forming a crank chamber; a second housing; a drive shaft; a rotor mounted on the drive shaft to rotate with the drive shaft; a swash plate connected to the rotor by a hinge mechanism to rotate together with the rotor; and a plurality of pistons that are respectively disposed in the plurality of the cylinder bores and are connected the swash plate to undergo a linear reciprocating motion by a rotational motion of the swash plate. The hinge mechanism includes: a guide groove provided in the rotor; a connecting arm connected to the swash plate and having a cylindrical receiving space; and a cylindrical guide roller that is disposed in the receiving space in a state of being arranged in the guide groove.

A variable capacity swash plate type compressor includes: a cylinder block forming a plurality of cylinder bores; a first housing connected to the cylinder block and forming a crank chamber; a second housing; a drive shaft; a rotor mounted on the drive shaft to rotate with the drive shaft; a swash plate connected to the rotor by a hinge mechanism to rotate together with the rotor; and a plurality of pistons that are respectively disposed in the plurality of the cylinder bores and are connected the swash plate to undergo a linear reciprocating motion by a rotational motion of the swash plate. The hinge mechanism includes: a guide groove provided in the rotor; a connecting arm connected to the swash plate and having a cylindrical receiving space; and a cylindrical guide roller that is disposed in the receiving space in a state of being arranged in the guide groove.

A liquid delivery device includes a pump head having a pump chamber provided in the inside, a plunger whose tip is slidably inserted into the pump chamber, and at least one plunger pump having a drive mechanism that reciprocates the plunger in its axial direction. Then, at least one of the plunger pumps is a pressurizing pump that pressurizes a mobile phase including a compressible fluid sucked into the pump chamber and then discharges the mobile phase from the pump chamber, and at least the pump head of the pressurizing pump includes a cooling part that is connected to an outlet channel from the pump chamber, and allows the pump head to absorb heat of the mobile phase discharged from the pump chamber to cool the mobile phase.

A liquid delivery device includes a pump head having a pump chamber provided in the inside, a plunger whose tip is slidably inserted into the pump chamber, and at least one plunger pump having a drive mechanism that reciprocates the plunger in its axial direction. Then, at least one of the plunger pumps is a pressurizing pump that pressurizes a mobile phase including a compressible fluid sucked into the pump chamber and then discharges the mobile phase from the pump chamber, and at least the pump head of the pressurizing pump includes a cooling part that is connected to an outlet channel from the pump chamber, and allows the pump head to absorb heat of the mobile phase discharged from the pump chamber to cool the mobile phase.

An electric drive compressor system (1) comprising: a reciprocating compressor (2) having temperature and pressure sensors (83, 84) for sensing a pressure and temperature of gas prior to compression by the compressor (1) and for sensing a pressure and temperature of gas after compression by the compressor (1); a motor (3) connected to the compressor (1) for driving the compressor (1); a cooling system (4) for cooling the motor (3); and a controller (5) for controlling the motor (3) in real time based on the temperature and pressure sensor readings of the gas prior to and after compression by the compressor (1). Features and advantages of the systems (1) as exemplified are as follows: lightweight and compact design; refrigerant circuit sealed from electric motor for ease of maintenance and service; air cooled from unique fin and airflow passage design, with fan width pulse width modulation; intelligent control system with pressure and temperature sensors/transducers and software; separate compressor working assembly to ensure piston alignment and compression is not affected by heat distortion; separate outer housing and compressor crankcase to ensure leak free operation.

A cam driven compressor includes a cam coupled to a plurality of cylinder and piston assemblies. Each cylinder and piston assembly comprises a piston located and movable within a respective cylinder. Each cylinder has a cylinder head. The compressor comprises a housing defining a cavity configured to receive a portion of a source gas from one or more of the cylinders in order to maintain a positive gas pressure within the cavity.

A cam driven compressor includes a cam coupled to a plurality of cylinder and piston assemblies. Each cylinder and piston assembly comprises a piston located and movable within a respective cylinder. Each cylinder has a cylinder head. The compressor comprises a housing defining a cavity configured to receive a portion of a source gas from one or more of the cylinders in order to maintain a positive gas pressure within the cavity.

A multi-stage compressor includes a compression module configured to compress a refrigerant therein through reciprocation of a plurality of pistons provided in a front housing, a rear housing coupled to the front housing to define an internal space between the front housing and the rear housing; a separation plate located between the front housing and the rear housing to separate the internal space between the front housing and the rear housing into a front space and a rear space; and a partition wall coupled to the rear housing to partition the rear space into an injection space before a refrigerant injected thereinto is primarily compressed, a primary discharge space from which the refrigerant is discharged in a primary compressed state by some of the pistons, and a secondary discharge space from which the primary compressed refrigerant is discharged.

A swash plate has a base material having an annular shape including a surface facing a mating member, a plurality of grooves extending in a direction intersecting with a sliding direction of the mating member on the entire circumference of the annular shape on the surface, and a resin coating layer formed on the surface and forming a sliding surface with the mating member.