A tubephragm pump includes a tubephragm that has a pump head portion that forms a pump chamber, a driving head that holds the tubephragm and expands and contracts the pump chamber by directly pressing and pulling the pump head portion in a direction intersecting with a transfer direction of a transfer fluid, a driving unit that drives the driving head back and forth in a driving direction to expand and contract the pump chamber, and a control unit that controls the driving unit. The tubephragm is in a flat shape with a cross-sectional shape intersecting with the transfer direction of the transfer fluid of the pump chamber having a length in a direction intersecting with the driving direction longer than a length in the driving direction. A pair of liquid contacting surfaces opposing in the driving direction of the pump chamber move while maintaining a parallel state.

A multistage compressor is disclosed that may include a wobbling member operationally coupled with an external power source. The external power source may drive a nutating motion of the wobbling member. The multistage compressor may further include a plurality of flexible chambers connected to the wobbling member, each flexible chamber including a respective intake passage and a respective discharge passage. The wobbling member may sequentially press down and pull up the plurality of flexible chambers. The multistage compressor may further include a one-way valve in each respective intake passage and gas may be drawn into each flexible chamber through the respective one-way valve of each flexible chamber as the wobbling member pulls up each flexible chamber. The gas may then be compressed to a higher pressure as the wobbling member presses down each flexible chamber and compressed gas may be discharged through the respective discharge passage of each flexible chamber.

A multistage compressor is disclosed that may include a wobbling member operationally coupled with an external power source. The external power source may drive a nutating motion of the wobbling member. The multistage compressor may further include a plurality of flexible chambers connected to the wobbling member, each flexible chamber including a respective intake passage and a respective discharge passage. The wobbling member may sequentially press down and pull up the plurality of flexible chambers. The multistage compressor may further include a one-way valve in each respective intake passage and gas may be drawn into each flexible chamber through the respective one-way valve of each flexible chamber as the wobbling member pulls up each flexible chamber. The gas may then be compressed to a higher pressure as the wobbling member presses down each flexible chamber and compressed gas may be discharged through the respective discharge passage of each flexible chamber.

A magnetically driven pressure generator including a housing, flexible member, first magnetic force generator, and second magnetic force generator. The magnetically driven pressure generator oscillates the flexible member to increase or decrease the volume of a chamber, inversely increasing or decreasing the pressure of the chamber.

A magnetically driven pressure generator including a housing, flexible member, first magnetic force generator, and second magnetic force generator. The magnetically driven pressure generator oscillates the flexible member to increase or decrease the volume of a chamber, inversely increasing or decreasing the pressure of the chamber.

A compact pump includes a case, a diaphragm assembly disposed in the case at an upper position and includes diaphragm units which form respective pump chambers, and a swing body disposed in the case at a lower position and moves the plural diaphragm units in the top-bottom direction. The diaphragm assembly has intake valve elements for opening and closing respective air introduction holes. An upper cover of the case has an exhaust hole and ring-shaped recesses. The upper cover has tubular inner wall surfaces defining the respective ring-shaped recesses. The diaphragm assembly includes tubular exhaust valve elements which are disposed in the respective ring-shaped recesses so as to contact the plural respective tubular inner wall surfaces and a rib which is disposed at its center in the vicinity of the exhaust hole and connects center-side outer wall surfaces of the tubular exhaust valve elements.

A compact pump includes a case, a diaphragm assembly disposed in the case at an upper position and includes diaphragm units which form respective pump chambers, and a swing body disposed in the case at a lower position and moves the plural diaphragm units in the top-bottom direction. The diaphragm assembly has intake valve elements for opening and closing respective air introduction holes. An upper cover of the case has an exhaust hole and ring-shaped recesses. The upper cover has tubular inner wall surfaces defining the respective ring-shaped recesses. The diaphragm assembly includes tubular exhaust valve elements which are disposed in the respective ring-shaped recesses so as to contact the plural respective tubular inner wall surfaces and a rib which is disposed at its center in the vicinity of the exhaust hole and connects center-side outer wall surfaces of the tubular exhaust valve elements.

An electric inflator for connecting and inflating an inflatable device includes a shell, a drive motor configured on the axis of the shell, at least one air bag is configured in the shell and around the drive motor, an air outlet of the air bag connected to an inflatable device, and a pressing mechanism connected to an output portion of the drive motor. The air bag is pressed by the pressing mechanism driven by the drive motor for supplying air to the inflatable device. An inner space of the shell can be fully utilized thereby the size of the electric inflator is smaller than before. At the same time, an inner cavity of the air bag can be bigger than before to improve inflating efficiency, which increases portability and practicability of the electric inflator and the inflatable device equipped with the electric inflator.

An electric inflator for connecting and inflating an inflatable device includes a shell, a drive motor configured on the axis of the shell, at least one air bag is configured in the shell and around the drive motor, an air outlet of the air bag connected to an inflatable device, and a pressing mechanism connected to an output portion of the drive motor. The air bag is pressed by the pressing mechanism driven by the drive motor for supplying air to the inflatable device. An inner space of the shell can be fully utilized thereby the size of the electric inflator is smaller than before. At the same time, an inner cavity of the air bag can be bigger than before to improve inflating efficiency, which increases portability and practicability of the electric inflator and the inflatable device equipped with the electric inflator.

A pneumatic elastic band includes an outer portion, an inflatable portion and a nozzle. The outer portion has a strip-shaped structure with elasticity. The inflatable portion includes a plurality of expansion portions and a plurality of communication portions. Each of the communication portions is connected between two of the expansion portions adjacent to each other for defining a plurality of gaps. The nozzle is disposed on a surface of the outer portion and communicated with the inflatable portion. When a gas is guided into the inflatable portion through the nozzle, the plurality of expansion portions of the inflatable portion are inflated to fill the gaps and make the inflatable portion contract inwardly, so that the outer portion contracts inwardly and deforms, wherein when the gas is guided out of the inflatable portion, the inflatable portion is deflated and loosened to return to an uninflated state to loosen the shoe.