Backflow preventing attachment for toilets

Abstract

A toilet backflow preventing means and toilet bowl support for mounting between a standard soil pipe mounting flange and drain horn of a standard toilet bowl supports the toilet bowl closely adjacent the floor level, receives standard toilet bolts clamping the backflow presenting means between the toilet bowl and within the uppermost position of the soiled pipe. The backflow preventing means comprises a duckbill valve secured in said soil pipe.

1 ) A toilet backflow preventing means comprising 
 an elongated tubular device having a first end and a second opposite end,    said first end having a perpendicular flange,    said second end terminating in a plurality radial slits,    said slits having edges normally in abutment to valve close said elongated tubular device,    said slits adapted and constructed to part under the aegis of a liquid discharge in one slits direction through said elongated tubular decice,    at least the second opposite end of the elongated tubular device having said plurality of radial slits being constructed of an elastomeric material,    whereby with the cessation of the liquid discharge the slits will assume a normal abutment, thereby preventing a gaseous flow through the elongated device in an opposite direction.    
   
   
       2 ) The toilet backflow preventing means of  claim 1  wherein slits define a dukbill valve.