Abstract: A pump for fluid to be pumped from a fluidic reserve. The pump includes a pump body having: a first end from which extends at least one intake manifold opening into a fluidic chamber to enable a fluid intake; a second end opposite the first end; and at least one fluidic pipe extending spirally about the pump body between the first end and the second end. The fluidic pipe has a first opening for connecting to the fluidic reserve, located at the second end of the pump body, and a second opening connected to the intake manifold.

Abstract: A process for transferring hydrogen from a first tank wherein the hydrogen is in an initial liquid state at a pressure of the order of 10 bar to a second tank wherein the hydrogen is in a final state at a pressure greater than or equal to 500 bar. The process includes: a first pumping step of the hydrogen from the initial state thereof to an intermediate state wherein the hydrogen has a pressure greater than that of the initial state thereof; and a second pumping step of the hydrogen from the intermediate state thereof to bring it to the final state thereof. The first pumping step and the second pumping step are carried out respectively by mutually separate first compression and second compression elements.