ES394608A1 - Improvements in devices for air pumping in pneumatically inflatable bodies. (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Improvements in devices for the pumping of air in pneumatically inflatable bodies, particularly in folding bodies of considerable volume, characterized in that inside the pneumatically inflatable body there is an enclosure of much smaller volume than the total of the inflatable body, isolated from the rest of the body. Internal space of the latter by hollow walls, in turn pneumatically inflatable by means of conduits directly connected to the outside, so that at least two external walls substantially opposite the inflatable body itself are part of the walls of the enclosure mentioned, providing one of these portions of the external wall of the body common to the enclosure of a unidirectional valve, which allows the entrance and prevents the exit of air in the enclosure, and being arranged through one of the inflatable hollow walls of the enclosure a conduit that joins the latter with the rest of the inflatable body, interspersed also in said duct is a unidirectional valve, which allows the passage of air from the enclosure to the rest of the body but prevents it in the reverse direction, all arranged in such a way that said enclosure, after inflating its hollow walls, constitutes a pumping device capable of deform under the action of external solicitations and recover when they cease thanks to the elasticity of their hollow, swollen walls. (Machine-translation by Google Translate, not legally binding)