An electrochemically actuated pump and an electrochemical actuator for use with a pump. The pump includes one of various stroke volume multiplier configuration with the pressure of a pumping fluid assisting actuation of a driving fluid bellows. The electrochemical actuator has at least one electrode fluidically coupled to the driving fluid chamber of the first pump housing and at least one electrode fluidically coupled to the driving fluid chamber of the second pump housing. Accordingly, the electrochemical actuator selectively pressurized hydrogen gas within a driving fluid chamber.

A device and method for treating a wound of a patient with negative pressure is provided. The device comprises a heat-assisted pump system. The pump system can be powered in part by heat derived from the patient. The pump system may be configured to be highly planar, light weight, and portable. The pump system may comprise a Stirling engine or a thermal acoustic engine.

A device and method for treating a wound of a patient with negative pressure is provided. The device comprises a heat-assisted pump system. The pump system can be powered in part by heat derived from the patient. The pump system may be configured to be highly planar, light weight, and portable. The pump system may comprise a Stirling engine or a thermal acoustic engine.

The present invention includes an electrochemical actuator pump and method of making the same, comprising a membrane electrode assembly comprising an ion exchange membrane, a first and a second catalyzed porous electrode in contact with opposing sides of the ion exchange membrane; a first gas chamber in fluid communication with the first electrode, and a second gas chamber in fluid communication with the second electrode; and a controller for controllably reversing the polarity of a voltage source electrically coupled to the first and second electrodes, wherein the controller causes a first polarity at the first electrode to function as an anode and the second electrode to function as a cathode, wherein the first polarity simultaneously decreases the hydrogen gas pressure in the first hydrogen gas chamber and increases the hydrogen gas pressure in the second hydrogen gas chamber, with additional embodiment using MOF or Ni—H batteries.

Pulse tube coolers and Gifford-McMahon coolers are used to cool nuclear spin tomographs and cryopumps. To supply cooled working gas, gas compressors and in particular helium compressors are used with rotational or rotary valves. The rate at which compressed helium is introduced into the cooling device and let out again lies in the range of 1 Hz. A problem of conventional screw or piston processors is that oil from the compressor mixes with the working gas and thus contaminates the cooling device. By providing a second compressor stage, a common pump device can be used to pump in both directions, which results in a two-stage compressor device. The working gas is compressed in each flow direction of the working liquid, in one flow direction in the first compressor stage and in the opposite flow direction in the second compressor stage. Thus, the efficiency of the compressor device is improved.

Pulse tube coolers and Gifford-McMahon coolers are used to cool nuclear spin tomographs and cryopumps. To supply cooled working gas, gas compressors and in particular helium compressors are used with rotational or rotary valves. The rate at which compressed helium is introduced into the cooling device and let out again lies in the range of 1 Hz. A problem of conventional screw or piston processors is that oil from the compressor mixes with the working gas and thus contaminates the cooling device. By providing a second compressor stage, a common pump device can be used to pump in both directions, which results in a two-stage compressor device. The working gas is compressed in each flow direction of the working liquid, in one flow direction in the first compressor stage and in the opposite flow direction in the second compressor stage. Thus, the efficiency of the compressor device is improved.

The bellows pump device supplies pressurized air to one air chamber of two hermetic air chambers thereby to cause a bellows to perform expansion operation to suck a transport fluid, and supplies pressurized air to the other air chamber thereby to cause the bellows to perform contraction operation to discharge the transport fluid. The bellows pump device includes: an electropneumatic regulator configured to adjust a first air pressure of the pressurized air to be supplied to the one air chamber, and a second air pressure of the pressurized air to be supplied to the other air chamber; and a control unit configured to control the electropneumatic regulator such that, at least at a time point of end of expansion during expansion operation of the bellows, the first air pressure is lower than the second air pressure.

The invention relates to pressure transfer device, system comprising the pressure transfer device, a fleet comprising the system and use of a pressure transfer device for pumping fluid at pressures above 500 bars, the pressure transfer device (1, 1) comprising a pressure chamber housing (1, 1) and at least one connection port (3, 3), the at least one connection port (3, 3) being connectable to a dual acting pressure boosting liquid partition device (2) via fluid communication means (26, 27; 26, 27), the pressure chamber housing comprises: a pressure cavity (4, 4) inside the pressure chamber housing, and at least a first port (5, 5) for inlet and/or outlet of fluid to the pressure cavity (4, 4), a bellows (6, 6) defining an inner volume (7, 7) inside the pressure cavity (4, 4), and wherein the inner volume (7, 7) is in fluid communication with the connection port (3, 3), wherein the pressure cavity (4, 4) has a center axis (C, C) with an axial length (L) defined by the distance between the connection port (3, 3) and the first port (5, 5) and a varying cross sectional area over at least a part of the axial length (L), and wherein the bellows (6, 6) is configured to move in a direction substantially parallel with the center axis (C, C) over a part of the axial length (L) of the pressure cavity (4, 4).

The invention relates to pressure transfer device, system comprising the pressure transfer device, a fleet comprising the system and use of a pressure transfer device for pumping fluid at pressures above 500 bars, the pressure transfer device (1, 1) comprising a pressure chamber housing (1, 1) and at least one connection port (3, 3), the at least one connection port (3, 3) being connectable to a dual acting pressure boosting liquid partition device (2) via fluid communication means (26, 27; 26, 27), the pressure chamber housing comprises: a pressure cavity (4, 4) inside the pressure chamber housing, and at least a first port (5, 5) for inlet and/or outlet of fluid to the pressure cavity (4, 4), a bellows (6, 6) defining an inner volume (7, 7) inside the pressure cavity (4, 4), and wherein the inner volume (7, 7) is in fluid communication with the connection port (3, 3), wherein the pressure cavity (4, 4) has a center axis (C, C) with an axial length (L) defined by the distance between the connection port (3, 3) and the first port (5, 5) and a varying cross sectional area over at least a part of the axial length (L), and wherein the bellows (6, 6) is configured to move in a direction substantially parallel with the center axis (C, C) over a part of the axial length (L) of the pressure cavity (4, 4).

An electrochemically actuated pump and an electrochemical actuator for use with a pump. The pump includes one of various stroke volume multiplier configuration with the pressure of a pumping fluid assisting actuation of a driving fluid bellows. The electrochemical actuator has at least one electrode fluidically coupled to the driving fluid chamber of the first pump housing and at least one electrode fluidically coupled to the driving fluid chamber of the second pump housing. Accordingly, the electrochemical actuator selectively pressurized hydrogen gas within a driving fluid chamber.