Patent ID: 7954223

Claim:
A method for producing a sealed assembly between the opening of a bore belonging to a support and a screw comprising a head connected to a body provided with a threaded part intended to cooperate with a hole in a piece to be assembled with the support, the support having a lower mechanical strength than the screw, wherein that, starting from an enlarged opening frustoconical in shape located on the support and a screw head provided with an under-head surface planar of revolution, the method comprises the following steps: engaging the screw in the bore so that the head comes into contact with the frustoconical-shaped opening of the support; screwing the screw into the hole in the piece to be assembled so that the pressure exerted by the head causes a sealed fitting of the frustoconical-shaped opening on part of the under-head surface of the screw by attenuation of the defects in the frustoconical-shaped opening due to the friction of part of said under-head surface of the screw with said frustoconical-shaped opening and by pushing back part of the material belonging to the support; and wherein the pressure exerted by the screw head causes, by rubbing and pushing back of material, the creation of a first surface on the frustoconical-shaped opening, extending circumferentially around the axis of revolution of the screw.