The negative pressure generator includes a chamber body with a suction nozzle; a piston, arranged inside the chamber body; and a driving device configured to drive the piston to reciprocated move inside the chamber body so as to generate negative pressure at the suction nozzle.

The piston compressor for compressing a gas having a cylinder and also including a piston, a piston rod, packing, a crosshead and a drive, wherein: the piston is disposed for movement in a longitudinal direction L inside the cylinder; the piston is connected to the crosshead by means of a piston rod; packing is disposed between the piston and the crosshead, through which packing the piston rod runs; the crosshead is driven by the drive; in addition an activatable magnetic bearing is disposed between the piston and the crosshead; the magnetic bearing can generate a magnetic force F.sub.m on the piston rod, at least perpendicularly to the longitudinal direction L; and an activation device activates the magnetic force F.sub.m generated by the magnetic bearing on the piston rod.

The piston compressor for compressing a gas having a cylinder and also including a piston, a piston rod, packing, a crosshead and a drive, wherein: the piston is disposed for movement in a longitudinal direction L inside the cylinder; the piston is connected to the crosshead by means of a piston rod; packing is disposed between the piston and the crosshead, through which packing the piston rod runs; the crosshead is driven by the drive; in addition an activatable magnetic bearing is disposed between the piston and the crosshead; the magnetic bearing can generate a magnetic force F.sub.m on the piston rod, at least perpendicularly to the longitudinal direction L; and an activation device activates the magnetic force F.sub.m generated by the magnetic bearing on the piston rod.

An air compression device has a housing, a compressor device for the compression of air, an electric motor for driving the compressor device and for generating an air flow within the housing, a transmission for mechanically connecting the electric motor to the compressor device, and a power supply at least for supplying the electric motor with power. At least sections of the compressor device, the electric motor, the transmission, and the power supply are arranged in the housing. The air compression device also includes an air guide device which guides the air flow from the power supply to the compressor device and the electric motor using the transmission, wherein at least sections of the air guide device are arranged within the housing.

An air compression device has a housing, a compressor device for the compression of air, an electric motor for driving the compressor device and for generating an air flow within the housing, a transmission for mechanically connecting the electric motor to the compressor device, and a power supply at least for supplying the electric motor with power. At least sections of the compressor device, the electric motor, the transmission, and the power supply are arranged in the housing. The air compression device also includes an air guide device which guides the air flow from the power supply to the compressor device and the electric motor using the transmission, wherein at least sections of the air guide device are arranged within the housing.

An air compression device includes: a compressor device for the compression of air, wherein the compressor device has a compressor axis and the compressor axis is defined by a direction in which air is compressed by the compressor device; an electric motor for driving the compressor device, wherein the electric motor has an electric motor axis formed by an axis of rotation of the electric motor; and a transmission that mechanically connects the electric motor to the compressor device. The transmission arranges the compressor device and the electric motor at an angle to one another, and the compressor axis and the electric motor axis enclose an angle between 10° and 80°, in particular 20° and 70°, more specifically 30° and 60°.

An air compression device includes: a compressor device for the compression of air, wherein the compressor device has a compressor axis and the compressor axis is defined by a direction in which air is compressed by the compressor device; an electric motor for driving the compressor device, wherein the electric motor has an electric motor axis formed by an axis of rotation of the electric motor; and a transmission that mechanically connects the electric motor to the compressor device. The transmission arranges the compressor device and the electric motor at an angle to one another, and the compressor axis and the electric motor axis enclose an angle between 10° and 80°, in particular 20° and 70°, more specifically 30° and 60°.

An air compressor contains: a body, a cylinder, a motor, and a transmission mechanism. The body includes multiple positioning orifices which are a first positioning orifice and a second positioning orifice. The cylinder is connected on the body and communicates with an air storage holder. The motor is fixed on the body, a small gear is received in the first positioning orifice, and a connection seat of the motor is accommodated in the first orifice. The transmission mechanism actuates the piston to move in the cylinder reciprocately so as to produce compressed airs. The motor further includes multiple fixing portions extending from a head edge of the casing thereof and configured to engage with the body, thus fixing the motor on the body securely without using any screws.

An air compressor is received in an accommodation box and contains a body, a cylinder, a motor, and a transmission mechanism. The body includes a first positioning orifice and a second positioning orifice. The cylinder is connected on the body and communicates with an air storage holder. The motor is fixed on the body, a small gear is received in the first positioning orifice, and a connection seat is accommodated in the first orifice. The transmission mechanism actuates a piston to move in the cylinder reciprocately so as to produce compressed airs. The motor includes at least one locking extension for engaging the motor with the body, hence the motor is fixed on the body securely without using any screws.

An air compressor is received in an accommodation box and contains a body, a cylinder, a motor, and a transmission mechanism. The body includes a first positioning orifice and a second positioning orifice. The cylinder is connected on the body and communicates with an air storage holder. The motor is fixed on the body, a small gear is received in the first positioning orifice, and a connection seat is accommodated in the first orifice. The transmission mechanism actuates a piston to move in the cylinder reciprocately so as to produce compressed airs. The motor includes at least one locking extension for engaging the motor with the body. A first end of a respective one locking extension extends from the motor, and a second end of the respective one locking extension is engaged on the body, hence the motor is fixed on the body securely without using any screws.