Abstract: An inflatable deicer boot for mounting on an airfoil with at least one leading edge tubular member positioned in the area of the stagnation line of the airfoil. The boot also has a plurality of upper and lower inflatable passages on either side of the leading edge tubular member. In the inflation sequence of the deicing cycle, the leading edge tubular member is inflated before inflation of the upper and lower inflatable passages to crack the ice formed on the outside surface of the boot at the stagnation line of the airfoil. The upper and lower inflatable passages are then inflated to shatter and eject the ice formed on the boot over the upper and lower inflatable passages. Means are then provided to deflate the tubular member for a predetermined time after which the deicing cycle is repeated.

Abstract: In a device for breaking up ice formed on a contoured surface before it reaches a dangerous thickness, a flexible and porous membrane is fixed on the contoured surface along airtight lines of contact defining elementary chambers, each of which communicates with a main chamber inside the contoured surface. The main chamber is fed continuously by a source of hot gases. The closing up of the pores of the membrane by ice causes an inflation of the elementary chambers and a deformation of the membrane. Application is to the cowl of the air intake of a turbojet engine and to a detector used for the control of a de-icing device of any type.

Abstract: A deicer pad mounted on the leading edge of a helicopter blade. The deicer pad is a composite structure having two layers stitched together to form spanwise passageways on the intermediate portion that is essentially located on the intermediate portion of the blade and chordwise passageways on the spaced apart end portions that form the upper and lower portion of the deicer pad. The upper and lower portions are located rearwardly of the leading edge and are on the upper and lower portions of the helicopter blade.

Abstract: Pneumatic deicer with multiple inflatable chambers made of rubberized fabric in which all of chambers (10) or of a group of chambers are made of a double rubberized fabric on its outer faces which form two separate layers (14.1-14.2) which are connected along spaced linear areas (15) which are interknit from one layer to the other to delimit the juxtaposed tubular chambers, characterized by the fact that the interknit linear zones are oriented in the longitudinal direction of the tricot and this double tricot is a Jersey tricot with a transverse extensibility rate which is equal to at least twice its longitudinal expandability.

Abstract: A pneumatic deicer and a method for making such deicer having a plurality of inflatable tubes which are capable of being distended by inflation to break up the accumulation of ice. The tubes are constructed with a nonflowing elastomeric compound leaving a passageway therein after vulcanization of the deicer by external heat.