Abstract: A tire for an aeroplane and, in particular, to the crown of a tire for an aeroplane, having reduced dimensions and mass of the pieces of tread in the event of accidental tire tread separation, without the use of additional devices external to the tire and therefore without penalizing the payload of the aeroplane, including a tread intended to come into contact with the ground via a tread surface and comprised radially between a bottom surface and the tread surface, the tread comprising at least two circumferential ribs adjacent to at least one circumferential groove, each circumferential rib extending radially between the bottom surface and the tread surface and axially between two edge corners in the tread surface, and a crown reinforcement radially on the inside of the bottom surface, wherein a tread separation layer is arranged radially on the inside of at least one circumferential rib between the bottom surface and the crown reinforcement, axially between the two edge corners of the said circumferential r

Abstract: A tire for an aeroplane and, in particular, to the crown of a tire for an aeroplane, having reduced dimensions and mass of the pieces of tread in the event of accidental tire tread separation, without the use of additional devices external to the tire and therefore without penalizing the payload of the aeroplane, having a tread intended to come into contact with the ground via a tread surface, and extending radially between a bottom surface and the tread surface, the tread comprising at least two circumferential ribs adjacent to at least one circumferential groove, each circumferential rib extending radially between the bottom surface and the tread surface, axially between two lateral faces and circumferentially around the entire periphery of the tire, wherein the tread comprises rows of cavities formed in at least one circumferential rib and opening onto the tread surface, the rows of cavities, which are parallel to one another, are inclined with respect to the circumferential direction (XX?) of the tire at

Abstract: A tire for an aeroplane and, in particular, a crown of a tire for an aeroplane, to reduce the dimensions and mass of pieces of tread in the event of accidental tire tread separation, without the use of additional devices external to the tire, which includes a tread intended to come into contact with the ground via a tread surface, and extending radially between a bottom surface and the tread surface, the tread comprising independent cavities. According to the invention, each cavity has, in the tread surface, an opening surface inscribed inside a circle, the centers (O) of the circles, circumscribed at the opening surfaces of the cavities, are distributed axially, over at least part of the axial width (l) of the tread surface, with an axial spacing (pY) at least equal to 0.02 times and at most equal to 0.

Abstract: A tire for an aeroplane and, in particular, to the crown of a tire for an aeroplane, having reduced dimensions and mass of the pieces of tread in the event of accidental tire tread separation, without the use of additional devices external to the tire and therefore without penalizing the payload of the aeroplane, including a tread intended to come into contact with the ground via a tread surface and comprised radially between a bottom surface and the tread surface, the tread comprising at least two circumferential ribs adjacent to at least one circumferential groove, each circumferential rib extending radially between the bottom surface and the tread surface and axially between two edge corners in the tread surface, and a crown reinforcement radially on the inside of the bottom surface, wherein a tread separation layer is arranged radially on the inside of at least one circumferential rib between the bottom surface and the crown reinforcement, axially between the two edge corners of the said circumferential r

Abstract: A tire for an aeroplane and, in particular, to the crown of a tire for an aeroplane, having reduced dimensions and mass of the pieces of tread in the event of accidental tire tread separation, without the use of additional devices external to the tire and therefore without penalizing the payload of the aeroplane, having a tread intended to come into contact with the ground via a tread surface, and extending radially between a bottom surface and the tread surface, the tread comprising at least two circumferential ribs adjacent to at least one circumferential groove, each circumferential rib extending radially between the bottom surface and the tread surface, axially between two lateral faces and circumferentially around the entire periphery of the tire, wherein the tread comprises rows of cavities formed in at least one circumferential rib and opening onto the tread surface, the rows of cavities, which are parallel to one another, are inclined with respect to the circumferential direction (XX?) of the tire at

Abstract: A tire for an aeroplane and, in particular, a crown of a tire for an aeroplane, to reduce the dimensions and mass of pieces of tread in the event of accidental tire tread separation, without the use of additional devices external to the tire, which includes a tread intended to come into contact with the ground via a tread surface, and extending radially between a bottom surface and the tread surface, the tread comprising independent cavities. According to the invention, each cavity has, in the tread surface, an opening surface inscribed inside a circle, the centres (O) of the circles, circumscribed at the opening surfaces of the cavities, are distributed axially, over at least part of the axial width (l) of the tread surface, with an axial spacing (pY) at least equal to 0.02 times and at most equal to 0.

Abstract: The present invention relates to novel cephalosporin derivatives with improved pharmacokinetics, corresponding to the formula: ##STR1## in which: R.sub.1, R.sub.2 and R.sub.3 represent a hydrogen atom, or R.sub.1 and R.sub.2 represent a hydrogen atom or a methyl group and R.sub.3 represents a carboxyl group, or ##STR2## form a cyclobutyl group and R.sub.3 represents a carboxyl group; and A and B are different and occupy the meta and para positions of the benzene ring, one representing a hydroxyl group and the other being selected from the groups ##STR3## and --NH--SO.sub.2 --Alk--NH.sub.2 in which Alk denotes a C.sub.2 -C.sub.4 lower alkylene group and also to the pharmaceutically acceptable salts and esters of the said derivatives.It further relates to a process for the preparation of such cephalosporins and to pharmaceutical compositions in which they are present.

Abstract: The present invention relates to novel cephalosporin derivatives with improved pharmacokinetics, corresponding to the formula: ##STR1## in which: R.sub.1, R.sub.2 and R.sub.3 represent a hydrogen atom, or R.sub.1 and R.sub.2 represent a hydrogen atom or a methyl group and R.sub.3 represents a carboxyl group, or ##STR2## form a cyclobutyl group and R.sub.3 represents a carboxyl group; and A and B are different and occupy the meta and para positions of the benzene ring, one representing a hydroxyl group and the other being selected from the groups ##STR3## and --NH--SO.sub.2 --Alk--NH.sub.2 in which Alk denotes a C.sub.2 -C.sub.4 lower alkylene group and also to the pharmaceutically acceptable salts and esters of the said derivatives.It further relates to a process for the preparation of such cephalosporins and to pharmaceutical compositions in which they are present.