Roofing slab

DETAILED DESCRIPTION The object of the invention is to develop a roofing slab of this type in a manner which is more favorable from the standpoint of manufacture as well as of the mounting thereof.
This object is achieved by the invention by the edge collar (K) projecting also beyond the bottom side (U) of the roofing slab and passing into a dish (Sch) on the bottom (9) of which the hose connecting pipe (10) projects.
As a result of this development, there is obtained a roofing slab of the introductory-mentioned type which is of increased value in use.
The edge collar is continued beyond the bottom side of the roofing slab and passes there into a dish on the bottom of which the hose connecting pipe protrudes.
This can be produced as a single part by molding.
As a result of the difference in levels of the roofing slab and the dish which is obtained thereby, a high degree of stability is furthermore obtained.
In this way also a rather slight wall thickness can be used.
The conventional fastening means can be dispensed with in such a formation.
If preference is given to a version, which would have the advantage of an inspection of the dish, for example so as to remove leaves or similar particles which have been blown into it, an advantageous embodiment is then obtained in the manner that the edge collar is the mounting for the dish, which is developed as a separate structural part.
Here it is favorable from a standpoint of assembly that the side wall of the dish overlap the edge collar and that the attachment be effected by screws which pass through both.
The region of overlap leads to an additional mutual stabilizing of the individual parts which are connected to each other.
It is merely necessary to loosen the screws in order to clean the dish.
Another advantageous feature is that the bottom of the dish is deepened in funnel shape towards the hose connecting pipe.
Here a flat conical shape can be basically used; however, a flat pyramidal shape has proven particularly favorable from the standpoint of stabilization