The invention relates to a fluid compression apparatus comprising a first and a second compression chamber, an intake system communicating with the first compression chamber, a transfer system communicating with the first and second compression chambers, and a mobile piston for ensuring the compression of the fluid in the first and second compression chambers. The apparatus further comprises a discharge port which communicates with the second compression chamber and is configured to allow the outlet of compressed fluid, wherein the second compression chamber is defined by a part of the body of the piston and a fixed wall of the apparatus, the piston being translationally mobile according to a longitudinal direction, the piston having a tubular portion mounted around a fixed central guide, a terminal end of the central guide forming the fixed wall defining a part of the second compression chamber. The apparatus further comprises a sealing system formed between the central guide and the piston according to the longitudinal direction of translation of the piston, the intake system being located at a first end of the apparatus, the discharge port being located at a second end of the apparatus and the transfer system being located between the intake system and the discharge port.

A compressor including a pair of opposed pistons disposed in a housing and defining a compression chamber. An electromagnetic actuator reciprocatedly drives the pistons within the housing in cooperation with force accumulator. The force accumulators bank the force during a first reciprocation, decelerating the pistons, and apply the force in a subsequent reciprocation, thereby accelerating the pistons.

A compressor including a pair of opposed pistons disposed in a housing and defining a compression chamber. An electromagnetic actuator reciprocatedly drives the pistons within the housing in cooperation with force accumulator. The force accumulators bank the force during a first reciprocation, decelerating the pistons, and apply the force in a subsequent reciprocation, thereby accelerating the pistons.

The presently-disclosed subject matter includes a pressure intensification device that increases the pressure of a fluid at a first pressure to a second higher pressure. In some embodiments the devices comprises an outer shell, and outer element housed within the outer shell, and an inner element housed within the outer element, the inner and outer elements being configured to slide in a reciprocating manner within the outer shell to increase the pressure of a fluid. In some embodiments the device does not comprise an additional power source or motor to increase the pressure of the fluid to a second pressure.

The presently-disclosed subject matter includes a pressure intensification device that increases the pressure of a fluid at a first pressure to a second higher pressure. In some embodiments the devices comprises an outer shell, and outer element housed within the outer shell, and an inner element housed within the outer element, the inner and outer elements being configured to slide in a reciprocating manner within the outer shell to increase the pressure of a fluid. In some embodiments the device does not comprise an additional power source or motor to increase the pressure of the fluid to a second pressure.

The present invention relates to a dual-stage pump for a hydraulic system with a housing, a high and low-pressure pump element, a common pressure outlet and a switching valve that is arranged between a tank connection and the low-pressure pump element. The switching valve has a spring element and a piston being movable against a force of the spring element relative to the housing and having a closing member that can be lifted from a valve seat by a control pressure that is tapped on the pressure outlet and applied in a control pressure chamber. On the one hand, the invention is characterized in that the switching valve comprises a tappet that is movable relative to the housing and configured to move the piston and arranged between the control pressure chamber and the piston and has a smaller effective diameter than the piston. On the other hand, the invention is characterized in that the dual-stage pump comprises at least one valve that can be screwed into the housing, wherein a cutting edge of the valve is sealingly cut into the housing.

A pressure booster having two cylinders with two pistons, connected such that they operate simultaneously, which can be mounted in a multi-chamber containing simple pressure boosters nested that can be used to increase the pressure depending on the simple boosters being used is provided.

A two-component pumping system includes a first pump for pumping a first component, a second pump for pumping a second component, a motor, and a yoke assembly for connecting the motor to the first pump and the second pump and driving them simultaneously. The first pump includes a first displacement rod that reciprocates in a first pump axis. The second pump includes a second displacement rod that reciprocates in a second pump axis parallel to the first pump axis. The motor includes a drive shaft configured to reciprocate in a drive axis that is parallel to and in a common plane with the first and second pump axes. The motor is also configured to drive the first and second displacement rods in unison. The yoke assembly includes a top connector and a shoe. The top connector connects to the drive shaft.

A compressor for an internal combustion engine is provided. The compressor includes a compressor shaft having compressor blades attached thereto, positioned in an intake air duct, and rotating about an axis during compressor operation and a magnetic bearing positioned upstream of the compressor blades in the intake air duct, including a ring positioned around the compressor shaft, stator electrics arranged in the ring, and at least two magnets arranged on the compressor shaft configured to exert a magnetic force on the stator electrics to form an air gap between the ring and the compressor shaft.

An opposed-piston engine system equipped for full hybrid compressed-air/combustion includes capacity for storing air compressed by the engine during a combustion mode of operation. The hybrid opposed-piston engine system includes a control mechanization for operating the opposed-piston engine in a combustion mode by provision of fuel, in a compressed-air mode by provision of stored compressed air, and in a combustion mode supplemented by provision of stored compressed air. A method of operating a hybrid vehicle equipped with an opposed-piston engine includes storing air compressed by the engine during a combustion mode of operation and operating in the vehicle a compressed-air mode by provision of stored compressed air.