Closet flange bonding cylinder

Abstract

A unitary boding cylinder which is specially molded from either polyvinyl chloride (PVC) or acrylonitrile butadiene styrene (ABS) for use with a closet flange. The cylinder has a funnel-shaped bore, with a lower end which can be connected to the drainage system, and an upper end, with a larger outer diameter, to which a closet flange can be attached. One embodiment has an upper end with a wall thickness of 1½ inches. The closet flange can be attached directly to the cylinder by threading the mounting screws into the upper surface of the wall. When installing an offset flange, a section of the wall can be cut away to accommodate the angled neck of the offset flange, which is attached to the cylinder, not the concrete slab. A second embodiment, with ordinary wall thickness, can be used for interior installations.

1 . A unitary bonding cylinder with a bore for use with a closet flange having a mounting rim and a pipe portion, the cylinder having an upper end and a lower end, the upper end having a wall thickness of 1½ inches, creating a flat surface to which the mounting rim of the closet flange can be attached after the pipe portion of the closet flange is inserted into the bore, and the lower end having a funnel-shaped portion which terminates with a connection end having a wall thickness of ¼ inch, the connection end being dimensioned for connecting directly to a drainage pipe.  
   
   
       2 . The bonding cylinder of  claim 1  wherein a portion of the upper end can be horizontally cut to grade before the closet flange is mounted thereon.  
   
   
       3 . The bonding cylinder of  claim 1  wherein the closet flange is an offset flange with an angled neck, and a portion of the upper end of the bonding cylinder is removed in order to accommodate the angled neck of the offset flange before the mounting rim is attached to the flat surface remaining.  
   
   
       4 . The bonding cylinder of  claim 1  wherein the cylinder is molded from a material selected from polyvinyl chloride (PVC) and acrylonitrile butadiene styrene (ABS).  
   
   
       5 . A unitary bonding cylinder with a bore for use with a closet flange having a mounting rim and a pipe portion, the cylinder having an upper end and a lower end, the lower end having a funnel-shaped portion which terminates with a connection end being dimensioned for connecting directly to a drainage pipe.  
   
   
       6 . The bonding cylinder of  claim 5  wherein a portion of the upper end can be horizontally cut to grade before the pipe portion of the closet flange is inserted into the bore of the cylinder.  
   
   
       7 . The bonding cylinder of  claim 5  wherein the cylinder is molded from a material selected from polyvinyl chloride (PVC) and acrylonitrile butadiene styrene (ABS).  
   
   
       8 . A method of installing a closet flange having a mounting rim and a pipe portion, the method comprising the steps of: 
 providing a unitary bonding cylinder with a bore, the cylinder having an upper end and a lower end, the lower end being generally funnel-shaped with a connection end;    connecting the connection end of the cylinder directly to a drainage pipe;    cutting the upper end of the cylinder to grade;    inserting the pipe portion of the closet flange into the bore of the cylinder.    
   
   
       9 . The method of  claim 8  wherein the upper end of the unitary bonding cylinder has a wall thickness of 1½ inches, which further includes the step of: 
 attaching the mounting rim of the closet flange directly to the upper end of the unitary bonding cylinder.    
   
   
       10 . The method of  claim 9  wherein the closet flange is an offset flange with an angled neck, which further comprises the step of: 
 before inserting the closet flange into the bore of the cylinder, removing a portion of the upper wall of the cylinder in order to accommodate the angled neck of the offset flange.