Abstract. Having a remarkable appearance, conoid type surfaces have frequently been used in architecture and constructions. Conoids are part of the category of ruled surfaces. The representation of this kind of surfaces can be performed with one of the following representation systems: orthogonal projection on two planes of projection (Monge projection), axonometry, projection with elevations. The present paper focuses upon the generation and projection with elevations of three types of conoids, namely the Plücker, the Küper and the Viviani conoids