A rotary air pipe connecting an air outlet of an inflator includes a pipe body, a sleeve with an inner wall and an outer wall, and a first sealing ring. The pipe body has main body and a bottom portion, a top of the main body is provided with a joint, a bottom portion has a front portion and a back portion. The bottom portion passes through the sleeve, the front portion fits the inner wall of the sleeve, the back portion extends out of the sleeve. The bottom portion can rotate around an axial direction of the pipe body in the sleeve; the bottom surface of the sleeve is provided with a thread connecting with the front wall. The back portion is movably inserted into the air outlet, the first sealing ring is sleeved with the back portion, the first sealing ring fits the back wall.

A process for internally cooling an inline compressor comprises the steps of providing a compression chamber between an outer cylinder and an intermediate cylinder and a drive chamber between the intermediate cylinder and a piston; admitting gas into the compression chamber; pumping drive fluid through the piston into the drive chamber to extend the intermediate cylinder and compress the compression chamber and the gas in the compression chamber; allowing heat from the compressed gas to transfer to the drive fluid; allowing the compressed gas to exit the compression chamber; allowing the withdrawal of the drive fluid from the drive chamber; passing the withdrawn drive fluid through a heat exchanger to cool the drive fluid for reuse in extending the intermediate cylinder.

A three-stage compression air pump includes a pump head and a pumping device. The pumping device includes first and second cylinders and a plunger. The first cylinder is connected with the pump head and coupled to a first piston moving in the second cylinder. The second cylinder includes a first end cap and a second end cap respectively coupled to the two ends thereof. The first cylinder is inserted through the first end cap. The second end cap defines an orifice allowing outside air to flow into the second cylinder and includes a one-way valve preventing the air in the second cylinder from flowing outside the three-stage compression pump. The plunger is inserted in and movably coupled to the first cylinder and coupled to a second piston moving in the first cylinder and connected with the second end cap. The plunger is inserted through the first piston.

A compressed air supply device for an air suspension system of a motor vehicle comprising a motor-driven compressor, a dryer, a discharge path from the dryer to the outside, and an adjustment device for changing a flow cross section of the discharge path is provided in the discharge path.

A natural gas pumping system that includes six reciprocating compressor cylinders, the reciprocating pistons of the six compressors having cycles offset by 60 degrees one from another.

A compressor includes a motor body having a gas compressing motor, at least a pneumatic cylinder for compressing gas, and at least a cooling fan. The pneumatic cylinder comprises a cylinder support arranged on top of the compressing motor, a valve panel arranged on top of the cylinder support, a cylinder cover provided on top of the valve panel, and a piston connecting rod body slidably connected with the cylinder support. The heat dissipating channels, the gas channels, and the heat dissipating passages are arranged in series to jointly form a heat dissipation path, such that when the piston connecting rod body is driven by the compressing motor to conduct a gas compressing process in the cylinder support, the cooling fan is also driven to operate to drive the external gas to flow through the heat dissipation path and to flow out, so as to bring out the heat produced during the operation of the pneumatic cylinder and to achieve an effective heat dissipation.

A vacuum pump is provided that includes a body, a first cylinder at least partially inside the body, a second cylinder at least partially inside the body, and an electric drive motor attached to the body and driving a common crank pin. The first cylinder has a first cylinder axis, and a first piston is reciprocal in the first cylinder. A first piston rod is attached to the first piston. The second cylinder has a second cylinder axis, and a second piston is reciprocal in the second cylinder. A second piston rod is attached to the second piston. The first and second cylinder axes are arranged at substantially 90° to each other. The first and second piston rods engage the common crank pin such that the first piston and the second piston are commonly driven by the common crank pin.

The compressor presents a first and a second cylinder block arranged in V and defining, respectively, a first and a second cylinder, and being affixed on a base block, each cylinder housing a respective piston driven by a crankshaft which is housed and supported on the base block. The first and the second cylinder block incorporate, respectively, a first and a second duct portion having an outer end open to the interior of the cylinder head of the respective cylinder, and an inner end open to a third duct portion incorporated to the base block, said duct portions forming a compressed air duct connecting the first cylinder to the second cylinder.

Example linear motors, linear compressors, and methods to assemble linear motors and linear compressors are described. An example linear motor includes a stator drive assembly and a mover drive assembly. The stator drive assembly includes a series of stator segments, each stator segment stackable on top of one another, and one or more stator alignment features to align the stator segments with a linear motor axis. The mover drive assembly includes one or more mover segments to be driven to move along the linear motor axis when induced by an electric current running through the series of stator segments. Such a linear motor may form part of an example linear compressor.

A gas transfer and depressurization system that is configured to transfer gas from a first location to a second location wherein during the transfer of gas the pressure of the first location is reduced. The gas transfer and depressurization system includes a drive chamber having an interior volume with a drive assembly movably disposed therein. A first cylinder and a second cylinder are operably coupled to the drive chamber on opposing sides thereof. The drive assembly includes a drive rod having portions extending into the first cylinder and second cylinder wherein the drive rod has pistons formed on opposing ends thereof. A controller is operably coupled to a compressed air source and is configured to provide compressed air into said drive chamber so as to reciprocally move the drive assembly. Gas blocks and coupling block are additionally present and facilitate flow of gas intermediate the first and second cylinders.