A liquid aeration system includes an air compressor system and a diffuser. The air compressor system includes an air intake manifold, an air compressor, and a compressor inlet line. The compressor inlet line fluidly connects the air intake manifold and the suction inlet of the air compressor. The compressor suctions air from the air intake manifold through at least the suction inlet hose. The compressor compresses the air into compressed air that is supplied to the diffuser.

An air compressor more reliably protects a battery pack without lowering its operability for attachment to and detachment from a battery mount. The air compressor includes an electric motor driven on power from a battery pack having six faces, an operation unit operable to connect or disconnect power to the electric motor, an compression unit driven by the electric motor to produce compressed air, a tank that stores the compressed air, a battery mount that receives an attachment face of the battery pack, and a guard defining a protective area to contain the battery pack and the compression unit. The battery pack is attachable to the battery mount with at least three of the six faces exposed.

An air compressor more reliably protects a battery pack without lowering its operability for attachment to and detachment from a battery mount. The air compressor includes an electric motor driven on power from a battery pack having six faces, an operation unit operable to connect or disconnect power to the electric motor, an compression unit driven by the electric motor to produce compressed air, a tank that stores the compressed air, a battery mount that receives an attachment face of the battery pack, and a guard defining a protective area to contain the battery pack and the compression unit. The battery pack is attachable to the battery mount with at least three of the six faces exposed.

A vacuum operated object lifting system is disclosed that can use air pressure differentials to anchor the lifting system to the floor or other structure. The vacuum lifting system includes a main structure having a space defined in the bottom thereof and a lifting arm system extending from the main structure for grasping and moving a load. The vacuum lifting system includes a vacuum pumping system including an air pump and a conduit system extending from the air pump to the space in the bottom of the main structure. Use of the air pump to draw air out of the conduit system creates pressure differential between ambient air pressure and air pressure in the space of the main structure to anchor the vacuum lifting system to the ground. The vacuum pumping system may also grasp the load by suction.

A vacuum operated object lifting system is disclosed that can use air pressure differentials to anchor the lifting system to the floor or other structure. The vacuum lifting system includes a main structure having a space defined in the bottom thereof and a lifting arm system extending from the main structure for grasping and moving a load. The vacuum lifting system includes a vacuum pumping system including an air pump and a conduit system extending from the air pump to the space in the bottom of the main structure. Use of the air pump to draw air out of the conduit system creates pressure differential between ambient air pressure and air pressure in the space of the main structure to anchor the vacuum lifting system to the ground. The vacuum pumping system may also grasp the load by suction.

The present invention concerns a pump for high-density powder transfer. The pump for high-density powder transportation according to the present invention has four-stroke operation, in which four pumping chambers in reality constitute a system of two pairs of chambers in line with each other. This makes it possible to divide the overall flow rate per minute over four tanks. Each of the four tanks has a reduced capacity, to the benefit of the compactness of the pump and the reduction of the loading/emptying times of the single tank, by exploiting the fluid-dynamic principle of communicating vessels the system of pairs of chambers in line increases the overall powder storage volume, thanks to a constant depression.

The present invention concerns a pump for high-density powder transfer. The pump for high-density powder transportation according to the present invention has four-stroke operation, in which four pumping chambers in reality constitute a system of two pairs of chambers in line with each other. This makes it possible to divide the overall flow rate per minute over four tanks. Each of the four tanks has a reduced capacity, to the benefit of the compactness of the pump and the reduction of the loading/emptying times of the single tank, by exploiting the fluid-dynamic principle of communicating vessels the system of pairs of chambers in line increases the overall powder storage volume, thanks to a constant depression.

An oil supply system for a compressor according to an embodiment includes an oil separator connected to a discharge pipe of the compressor, an oil tank for receiving oil from an oil sump of the oil separator, an oil pipe disposed between the oil separator and the oil tank, a pressure reducing valve disposed on the oil pipe, an oil supply pipe for supplying the oil to an oil line for supplying the oil to the compressor from an oil sump of the oil tank, and an agitator disposed on the oil pipe.

A wool-like fiber member that has high permeability and low absorbability is disposed around a discharge port of a discharge pipe that is configured to discharge condensate and compressed air stored within a tank.

A wool-like fiber member that has high permeability and low absorbability is disposed around a discharge port of a discharge pipe that is configured to discharge condensate and compressed air stored within a tank.