The invention is directed to a packaging machine with a fluid pump assembly of the radial cylinder type, the assembly comprising a plurality of at least three pumps. Each pump has a piston guided in a cylinder, as well as a high pressure port and a low pressure port. A manifold is provided connecting the high pressure ports of a first group of first stage pumps so that the pumps of this first group are operatively connected in parallel, while at least one second stage pump is operatively connected to the first group of pumps in series. The invention is further directed to a method for generating a vacuum in a packaging machine with a fluid pump assembly.

The present invention relates to a vehicle wheel comprising a hub, a rim and an inflatable tyre, in which the hub is situated around a rotation axle of the wheel, a compressor which is situated substantially inside the hub for compressing outside air, provided with an inlet for taking in air at atmospheric pressure and an outlet for delivering air at an increased pressure; a drive for driving the compressor, in which the drive is movable with respect to the rotation axle, in particular rotatable, more particularly rotatable in a direction opposite to that of the hub; an air reservoir for storing the air at increased pressure, in which the air reservoir is situated inside the rim of the wheel; a connection for connecting the outlet of the compressor to the air reservoir of the inflatable tyre of the wheel.

The present invention relates to a vehicle wheel comprising a hub, a rim and an inflatable tyre, in which the hub is situated around a rotation axle of the wheel, a compressor which is situated substantially inside the hub for compressing outside air, provided with an inlet for taking in air at atmospheric pressure and an outlet for delivering air at an increased pressure; a drive for driving the compressor, in which the drive is movable with respect to the rotation axle, in particular rotatable, more particularly rotatable in a direction opposite to that of the hub; an air reservoir for storing the air at increased pressure, in which the air reservoir is situated inside the rim of the wheel; a connection for connecting the outlet of the compressor to the air reservoir of the inflatable tyre of the wheel.

A compressor, and more particularly, an axial double piston compressor.

The invention relates to an integrated air-supply unit, in particular for air-suspension systems for motor vehicles, said unit comprising an air compressor having an electric motor and an air dryer. The air compressor together with the electric motor, air dryer and a number of pneumatic connections form a functional unit.

The invention relates to an integrated air-supply unit, in particular for air-suspension systems for motor vehicles, said unit comprising an air compressor having an electric motor and an air dryer. The air compressor together with the electric motor, air dryer and a number of pneumatic connections form a functional unit.

A sealed compressor comprises a sealed container (101) which accommodates an electric component (105) and a compression component (106); wherein the compression component (106) includes a shaft (110) including a main shaft section (111) and an eccentric shaft section (112), a cylinder block (114), a piston (126), and a main bearing unit (120) mounted to the cylinder block (114) and supporting the main shaft section (112) such that the main shaft section (112) is rotatable, a thrust ball bearing (132) mounted to a thrust surface (130) of the main bearing unit (120); and the thrust ball bearing (132) includes a plurality of balls (134) held in a cage (133), an upper race (135) having main surfaces one of which is in contact with upper portions of the balls (134); and a lower race (136) having main surfaces one of which is in contact with lower portions of the balls (134) and; a restricting means for restricting a displacement of the upper race (135) with respect to the shaft (110).

A sealed compressor comprises a sealed container (101) which accommodates an electric component (105) and a compression component (106); wherein the compression component (106) includes a shaft (110) including a main shaft section (111) and an eccentric shaft section (112), a cylinder block (114), a piston (126), and a main bearing unit (120) mounted to the cylinder block (114) and supporting the main shaft section (112) such that the main shaft section (112) is rotatable, a thrust ball bearing (132) mounted to a thrust surface (130) of the main bearing unit (120); and the thrust ball bearing (132) includes a plurality of balls (134) held in a cage (133), an upper race (135) having main surfaces one of which is in contact with upper portions of the balls (134); and a lower race (136) having main surfaces one of which is in contact with lower portions of the balls (134) and; a restricting means for restricting a displacement of the upper race (135) with respect to the shaft (110).

The present invention relates to a breathing air charger for detecting a tank state, capable of providing air properly adjusted in the concentration of oxygen and nitrogen to a breathing air tank used by a firefighter or a scuba diver, and of effectively discharging air from the breathing air tank.

A valve plate assembly for a compressor according to the principles of the present disclosure includes a valve plate and a suction valve retainer. The valve plate is configured to separate suction-pressure working fluid entering a cylinder of the compressor from discharge-pressure working fluid exiting the cylinder of the compressor. The valve plate defines a discharge valve seat. The suction valve retainer is configured to retain a suction valve within a suction valve seat disposed about a central longitudinal axis of the cylinder.