Abstract: The boat comprises in combination two lateral canvases (8) disposed tangentially to the two compartments (6,7), and a bottom canvas (11) held under tension by a longitudinal keel (9) interposed between a floor (10) and said bottom canvas (11).

Abstract: An inflatable reservoir for containing a liquid, more especially an inflatable swimming pool, formed from a single sheet of a flexible and fluid tight material defining a bottom supporting thereover the liquid filling the reservoir and a peripheral space formed by the remainder of the sheet folded back on itself inwardly over the whole of its periphery so as to form approximately a tube filled partially with liquid and partially with gas, discontinuous mechanical connection means being provided for connecting the free edge of the folded down remainder of the sheet to the bottom.

Abstract: The invention relates to a pneumatic boat of the inflatable-deflatable type capable of being propelled by a motor and comprising at least one inflatable member forming two parallel or substantially parallel arms joined at the front to form a stem-post and a rear board connecting these two arms and intended to receive or to house at least one motor, the two arms having, at least in their parallel or substantially parallel portions, a multi-lobe shaped cross section whose large axis slopes. The boat is characterized by the fact that a lateral canvas is fixed tangentially to at least some of the lobes on the outer side of the respective arm and by the fact that the slope of the large axis of the arm, the relative size of the lobes of this arm and the number of these lobes are such that the mean angle formed by this lateral canvas and the horizontal plane is between 5.degree. and 45.degree..

Abstract: Water reservoir comprising a flexible bottom and side walls formed by at least one inflatable tubular element extending along a closed contour, said bottom and said tubular element resting on a support.The bottom is connected to the tubular element by a peripheral connection zone extending between a line of the bottom parallel to the tubular element and spaced therefrom and a generatrix of the tubular element situated between the lower horizontal tangency generatrix and the inner vertical tangency generatrix of the tubular element. A brace is provided between the bottom line and said generatrix.

Abstract: An inflatable envelope surrounding a compression beam, at least one flexible traction beam associated with the compression beam and surrounding envelope. The traction and compression beams are coplanar and at least one flexible diagonal mechanical network is interposed between the beams integral therewith. The envelope, the compression and traction beams and the diagonal network are connected together so that the inflation of the envelope maintains the assembly of these elements in shape.