A pump, supplying powder for a variety of uses, has an outer body with an internal cavity; a compartment in the body has a volume which is variable on command by means of a motor drive, from a first condition, in which it fills with powder through openings that are in communication with a container that contains the powder to be dispensed, to a second condition, in which it is in contact with the initial part of a dispensing duct; a valve intercepts the duct and a first connector supplies compressed air to the compartment; a second connector controls the valve, and a third connector supplies air for the conveyance of the powder.

A one-way pumping device and its application devices, so as to enhance the resistance difference effect between the forward direction and the reverse direction of the one-way pumping device and realize a structure applicable to more application devices. To achieve the above purpose, this application provides the following technical solutions: a one-way pumping device, an artificial heart, and an internal combustion engine exhaust gas supercharging device.

An electronic device including a substrate, a thin film transistor, a micro pump, and a micro fluid platform is provided. The thin film transistor is disposed on the substrate. The micro pump is disposed on the substrate and electrically connected to the thin film transistor. The micro fluid platform is disposed on the substrate and coupled to the micro pump. The micro pump is configured to travel a to-be-test sample to the micro fluid platform.

A pump, supplying powder for a variety of uses, has an outer body with an internal cavity; a compartment in the body has a volume which is variable on command by means of a motor drive, from a first condition, in which it fills with powder through openings that are in communication with a container that contains the powder to be dispensed, to a second condition, in which it is in contact with the initial part of a dispensing duct; a valve intercepts the duct and a first connector supplies compressed air to the compartment; a second connector controls the valve, and a third connector supplies air for the conveyance of the powder.

A pumping device is provided, wherein the pumping device includes: a base including a main body having a base portion, one-way valves and perforations disposed through the base portion, and a cover attached to the base portion, the one-way valves being disposed on the base portion, nozzles being disposed on the base portion for selectably communicating inlet and outlet of the pumping device, the cover covering the base portion to form air passages in communication with the perforations, the cover including at least one through hole selectably in communication with the inlet and an external environment; and an operating unit including a pumping bag and a relief valve which are disposed on the base portion.