A rotary piston pump, in particular a claw pump, includes a housing which, when placed in a customary manner, has a housing inlet in a housing upper side. In order to further improve a rotary piston pump in a beneficial way, the housing inlet is connected to a gas channel that is integrated in the housing and extends transversely to a rotational axis of the piston, which gas channel creates a flow connection to a gas outlet of a filter part arranged in a filter receptacle. In the installed state, the filter part is accessible from a side perpendicular to the housing upper side, for maintenance purposes, for example.

According to one embodiment, a horizontal compressor comprises a container accommodating a compression mechanism unit and an electric motor unit, a first leg fixed to the container near the motor unit, a second leg fixed to an end of the container on the compression mechanism unit side, an accumulator between the legs, and a joint port in the container. The second leg includes a first support portion supporting the container in a horizontal attitude, and a second support portion supporting the container standing in a vertical attitude. The first support portion extends in a direction away from the joint port relative to the second support portion.

A rotary piston pump, in particular a claw pump, includes a housing which, when placed in a customary manner, has a housing inlet in a housing upper side. In order to further improve a rotary piston pump in a beneficial way, the housing inlet is connected to a gas channel that is integrated in the housing and extends transversely to a rotational axis of the piston, which gas channel creates a flow connection to a gas outlet of a filter part arranged in a filter receptacle. In the installed state, the filter part is accessible from a side perpendicular to the housing upper side, for maintenance purposes, for example.

A pump comprising a lower housing, a diaphragm assembly, an upper housing, a valve housing, and an o-ring is provided. The diaphragm assembly is positioned adjacent to the lower housing. The upper housing is positioned adjacent to the diaphragm assembly and includes an inlet chamber and an outlet chamber separated by a ring. The valve housing is positioned between the upper housing and the diaphragm assembly, encloses the inlet chamber and the outlet chamber, and includes a cutout in contact with the ring. The ring includes raised outer walls to receive the cutout and the o-ring is positioned between the raised outer walls of the ring and secured between the raised outer walls by the cutout.

The disclosure relates to a compressor having a noise reduction resonator. The compressor includes: a compression part having compression space in which introduced gas is accommodated, and configured to compress and discharge the gas in the compression space; and a gas moving part having an inner wall forming a gas flow path through which the gas discharged from the compression space moves, wherein the gas moving part is provided with a first resonator configured to communicate with the gas flow path on the inner wall forming the gas flow path and having a resonance space depressed upward in a moving direction of the gas. The compressor according to the disclosure may prevent compression efficiency from decreasing and maintain a noise reduction effect for a long period of time by preventing foreign objects or liquids from being accumulated in the resonance space.

A screw compressor for a utility vehicle includes a housing. The housing is filled with oil. At least one pair of compressor screws are mounted in the housing and serve to compress air supplied to the screw compressor. In the assembled state, a heat exchanger is directly placed onto and installed on the housing, by which heat exchanger the temperature of the oil contained in the housing can be controlled.

A rotational engine system comprises a rotational engine and a propulsion system. The rotational engine includes an outer ring enclosure, an inner ring component, and a drive gear. The inner ring component includes a piston and a drive gear engagement portion. The piston is configured to travel within the outer ring enclosure along a circumference of the outer ring enclosure. The drive gear engagement portion is configured to rotate as the piston travels along the circumference of the circular shape of the outer ring enclosure. The drive gear is coupled to the drive gear engagement portion of the inner ring component such that rotation of the drive gear engagement portion rotationally drives the drive gear. The propulsion system is configured to deliver propulsive energy to propel the piston along the circumference of the outer ring enclosure.

A scroll compressor includes: a shell forming an outer case, the shell forming an oil reservoir in which lubricating oil is reserved; a fixed scroll stored in the shell; an orbiting scroll stored in the shell, the orbiting scroll forming a compression chamber together with the fixed scroll; a frame holding the orbiting scroll; a thrust plate disposed between the orbiting scroll and the frame; and a thrust oil return pipe fixed to the frame, the thrust oil return pipe being a pipe through which the lubricating oil flows to return to the oil reservoir, in which: a hole portion is formed on the thrust plate, the hole portion passing from a first surface portion to a second surface portion, the first surface portion slidably contacting with the orbiting scroll, the second surface portion facing the frame; and the thrust oil return pipe is inserted into the hole portion and is fit in the thrust plate, and an upper end portion of the thrust oil return pipe does not protrude from the first surface portion of the thrust plate.

A retention arrangement is provided for a refrigerant compressor on a bodywork of a motor vehicle. The compressor is designed to compress a coolant of an air conditioning system. The refrigerant compressor is at least indirectly secured to the bodywork by the retention arrangement wherein the refrigerant compressor is held on the bodywork by a carrier or intermediary support which is itself held on the bodywork and on which at least one electrical component of the motor vehicle is held. The electrical component is different from the refrigerant compressor.

A multistage compression system uses refrigerant and oil. The multistage compression system includes a low-stage compressor that compresses the refrigerant, a high-stage compressor that further compresses the refrigerant compressed by the low-stage compressor, and an oil return pipe that returns the oil discharged by the high-stage compressor or the oil in the high-stage compressor to the low-stage compressor. The low-stage compressor has a rotary compression part that compresses the refrigerant, a motor that drives the compression part, and a container housing the compression part and the motor. The motor is disposed above the compression part. The oil return pipe is connected to a space below the motor inside the container.