Patent ID: 8430629

Claim:
An outer shroud for a stator stage of a turbomachine, wherein the shroud presents an axis of circular symmetry, the outer shroud comprising: a series of transversely-aligned openings suitable for receiving tops of stationary vanes, each of the vanes including a platform that is suitable for penetrating into a respective one of said openings so to enable each respective stationary vane to be mounted by welding between an edge of the respective opening and an outline of its platform, wherein each opening includes an inner segment opening into an inside face of the shroud and an outer segment opening into an outside face of the shroud, an outline of the outer segment surrounding, in radial projection, an outline of the inner segment, thereby defining a bearing face which connects the inner segment to the outer segment and which faces towards the outer segment, wherein a thickness of each respective opening is greater than a thickness of an outer portion of each respective platform, and an inner face of the outer portion of each respective platform abuts the bearing face of each respective opening, wherein the shroud does not include any other holes for mounting the vanes, and wherein the outline of the outer segment presents the shape of a quadrilateral.