A vacuum device for a material handling system includes a vacuum device body and a sealing element. The vacuum device body has a vacuum passageway in which a vacuum is generated in response to activation of a pressurized air supply that forces pressurized air through a venturi device. The sealing element moves to a sealing position to substantially seal the vacuum passageway when the air supply is activated, and is urged toward the sealing position via pressurized air that is diverted from an inlet of the vacuum device to the sealing element. The sealing element moves to substantially vent the vacuum passageway when the air supply is deactivated. The vacuum passageway may be in fluid communication with a vacuum cup, which seals against the object when the sealing element is at the sealing position and the vacuum generating device generates at least a partial vacuum in the vacuum passageway.

A vacuum device for a material handling system includes a vacuum device body and a sealing element. The vacuum device body has a vacuum passageway in which a vacuum is generated in response to activation of a pressurized air supply that forces pressurized air through a venturi device. The sealing element moves to a sealing position to substantially seal the vacuum passageway when the air supply is activated, and is urged toward the sealing position via pressurized air that is diverted from an inlet of the vacuum device to the sealing element. The sealing element moves to substantially vent the vacuum passageway when the air supply is deactivated. The vacuum passageway may be in fluid communication with a vacuum cup, which seals against the object when the sealing element is at the sealing position and the vacuum generating device generates at least a partial vacuum in the vacuum passageway.

The present invention relates to a suction device, including a body. A cavity is disposed in the body. The cavity has a closed end face and an open end face. The open end face forms an end face to suck a workpiece. A tangential nozzle is disposed on a sidewall surface of the cavity. An external fluid enters the cavity through the tangential nozzle along a tangential direction of the cavity. A suction hole is disposed on the closed end face. The suction hole is connected to a suction unit. The suction unit sucks the fluid in the cavity through the suction hole. The suction device can suck a workpiece by using both a rotational flow negative pressure and a negative suction pressure of a fluid in the cavity, and therefore can suppress impact of a workpiece surface on a suction force and generate a larger suction force.

A pneumatic suction device including a suction nozzle connected to a suction unit and at least one air amplification module located in at least one hose for connecting said suction nozzle to the suction unit. The at least one air amplification module includes at least two air amplifiers operating according to a Coanda effect.

A multistage aspirator for an inflatable assembly may comprise a first end defining a primary gas inlet and a second end defining a gas outlet. An internal surface of the multistage aspirator may define a flow path extending from the primary gas inlet to the gas outlet. A first stage of the multistage aspirator may include a first stage orifice extending from the internal surface to an external surface of the multistage aspirator. A second stage of the multistage aspirator may include a second stage orifice located downstream of the first stage orifice and extending from the external surface to the internal surface.

A multistage aspirator for an inflatable assembly may comprise a first end defining a primary gas inlet and a second end defining a gas outlet. An internal surface of the multistage aspirator may define a flow path extending from the primary gas inlet to the gas outlet. A first stage of the multistage aspirator may include a first stage orifice extending from the internal surface to an external surface of the multistage aspirator. A second stage of the multistage aspirator may include a second stage orifice located downstream of the first stage orifice and extending from the external surface to the internal surface.

Disclosed are devices and methods for generating electrical power by using airflow energy to create air pressure fluctuations within Helmholtz chambers containing piezoelectric materials. The generator device includes an intake having stationary blades for directing wind into a flow treatment stage, which in turn directs a flow of modified air into a flow interface stage. In the flow interface stage, a plurality of Helmholtz chambers containing piezoelectric units are configured around a flow interface chamber wherein passing modified airflow establishes air pressure fluctuations within the Helmholtz chambers thereby causing the piezoelectric units to generate electricity. The device routes generated electrical current to a processor for use as a power source. Also disclosed is a method of generating electrical power using airflow energy. The method includes collecting airflow from the environment to create pressure fluctuations within containers housing piezoelectric units.

Disclosed are devices and methods for generating electrical power by using airflow energy to create air pressure fluctuations within Helmholtz chambers containing piezoelectric materials. The generator device includes an intake having stationary blades for directing wind into a flow treatment stage, which in turn directs a flow of modified air into a flow interface stage. In the flow interface stage, a plurality of Helmholtz chambers containing piezoelectric units are configured around a flow interface chamber wherein passing modified airflow establishes air pressure fluctuations within the Helmholtz chambers thereby causing the piezoelectric units to generate electricity. The device routes generated electrical current to a processor for use as a power source. Also disclosed is a method of generating electrical power using airflow energy. The method includes collecting airflow from the environment to create pressure fluctuations within containers housing piezoelectric units.

A vacuum generation system includes a main ejector having a first fluid inlet and a second fluid inlet. The second fluid inlet is configured and adapted to pull dissolved gases out of fuel. The system includes a plurality of fluid sources configured and adapted to be variably supplied to the first fluid inlet of the main ejector. A method of modulating pressure in an ejector to generate a vacuum includes supplying a fluid to an ejector from at least one of a plurality of fluid sources, and generating a vacuum with the ejector for removing dissolved gasses out of fuel.

An ejector includes an ejector body having an internal passage and a negative-pressure generating mechanism including a nozzle unit and a diffuser unit that generates a negative pressure by using compressed air ejected by the nozzle unit. The ejector body has a first attachment surface to which a valve body of a switching valve is attached and a second attachment surface to which a base body of the manifold base is attached. The first attachment surface has a first inflow port for supplying compressed air to the negative-pressure generating mechanism by being connected to a first output port of the switching valve, and this port communicates with the nozzle unit. The second attachment surface has a negative-pressure supply port for outputting a negative pressure to the outside by being connected to a negative-pressure inflow port of the manifold base, and this port communicates with the diffuser unit.