Abstract: Disclosed is an anti-buckling device (1) which is made of an elastic material and comprises several ribs (2) that extend in the longitudinal direction thereof, the space between two ribs (2) forming a groove (3). The anti-buckling device (1) is inserted into a thin-walled duct. The anti-buckling device (1) prevents the duct from buckling and thus from being occluded in a bend when said duct is bent. A fluid is able to circulate within the duct and bypass the bend in the grooves (3) of the anti-buckling device (1). The envelope of the cross section of the anti-buckling device is essentially lenticular as a duct having a round cross section also becomes lenticular in a bend.

Abstract: An altitude protection device for an acceleration protection suit having a plurality of liquid-filled veins is comprised of a bladder inserted in a pocket. A spacer fabric that is non-compressible under the loads to be provided is enclosed in the pocket and defines a minimum volume inside the bladder. The bladder is closed off or opened relative to surrounding air in the aircraft cabin via a valve that is opened if a rate of pressure change in the cabin is less than or equal to a presettable maximum value, and closed if the rate of pressure change is greater than the value. If the valve closes and the pressure falls further, air located in the bladder inflates the bladder and pocket, increasing tensile stress in the fabric, and thereby raising the internal pressure of the veins resulting in increased internal pressure in the entire acceleration protection suit.

Abstract: The suit according to the invention comprises, as well as a textile lining and a skin made of low stretch textile material, a double walled skin lying between them, made of moderately stretchable watertight material. The latter is made of walls, which are joined together at connection positions for instance by welding. The mutually communicating hollow spaces arising thereby in the double walled skin are filled with a fluid. The suit is closed by zip fasteners (17, 19) and by shoulder straps (18). Short zip fasteners (26) in the crotch facilitate putting on the suit. The front part (20), armlets (21) thorax part (24) can be equipped with various structures of connecting positions, which however are arranged similarly on both halves of the suit. All the named parts (20, 21, 24) can be provided each with two valves (22, 23) for filling with the fluid and for ventilation.

Abstract: The suit according to the invention comprises, as well as a textile lining and an oversuit, an active part lying between them. This is at least partly made from a layer (3) on the body side and a layer (4) away from it, both of a fluid-tight, low stretch textile material, which are connected to each other at connection positions (6) by gluing, welding or sewing and thereby create hollow spaces (5), which are filled with fluid through valves (16, 17). Between regions, which comprise the layers (3, 4), for instance the upper part (14) and the front part (15), joining parts can be arranged, which transmit tensile forces only. This builds up a compensating pressure proportional to the acceleration working in the momentary and local direction on the parts of the body lying beneath and thus takes the load off the organism of the pilot arising from the effects of such accelerations.

Abstract: The active part of the suit comprises in part one layer (3, 4) facing the body and another one facing away from it, both of a gas-tight, low stretch textile material, which are joined together at connecting positions (6) by gluing, welding or sewing and thereby create hollow spaces (5), which are connected together via valves (18) and can be put under pressure. Between the regions, which comprise the layers (3, 4)—bands (11, 12)—connecting parts (7) are arranged, which transmit tensile forces only. If the hollow spaces (5) are put under a gas pressure proportional to the z-acceleration, then the suit builds up a compensating applied pressure and thus frees the organism of the pilot from the loading effects of such accelerations. By a suitable choice of the width of the bands (11, 12) in conjunction with the radius of the enclosed part of the body a compensating pressure to the hydrostatic pressure, proportional to the acceleration, of the body fluids can be set up.

Abstract: The suit according to the invention comprises, as well as a textile lining and an oversuit, an active part lying between them. This is at least partly made from a layer (3) on the body side and a layer (4) away from it, both of a fluid-tight, low stretch textile material, which are connected to each other at connection positions (6) by gluing, welding or sewing and thereby create hollow spaces (5), which are filled with fluid through valves (16, 17). Between regions, which comprise the layers (3, 4), for instance the upper part (14) and the front part (15), joining parts can be arranged, which transmit tensile forces only. This builds up a compensating pressure proportional to the acceleration working in the momentary and local direction on the parts of the body lying beneath and thus takes the load off the organism of the pilot arising from the effects of such accelerations.