Removable cartridge assembly for a waterless urinal

Abstract

A removable cartridge assembly for a waterless urinal. The cartridge assembly comprises a cup and a cap. The cup is adapted to receive a scent block therein. The cap is adapted to releasably engage the cup. When the cap is engaged with the cup, the scent block is retained in the cup and, when the cap is disengaged from the cup, the scent block is removable from within the cup, and thus from the cartridge assembly.

1 . A removable cartridge assembly for a waterless urinal, the cartridge assembly comprising: 
 a cup adapted to receive a scent block therein; and    a cap adapted to releasably engage the cup,    wherein, when the cap is engaged with the cup, the scent block is retained in the cup and, when the cap is disengaged from the cup, the scent block is removable from within the cup, and thus from the cartridge assembly.    
   
   
       2 . The assembly as claimed in  claim 1 , wherein the cup has at least one tab adapted to releasably engage at least one corresponding opening in the cap.  
   
   
       3 . The assembly as claimed in  claim 1 , wherein the cartridge includes a body adapted for sealing connection to an opening in the waterless urinal.  
   
   
       4 . The assembly as claimed in  claim 3 , wherein the body has an external thread on one end for engaging a retaining nut.  
   
   
       5 . The assembly as claimed in  claim 4 , wherein the other end of the body has a distally diverging taper adapted to receive the cup therein.  
   
   
       6 . The assembly as claimed in  claim 3 , wherein the interior of the body has a shoulder adapted to engage with corresponding recess formed in a flexible one way valve.  
   
   
       7 . The assembly as claimed in  claim 6 , wherein the cup is releasably connected to, and supported within the taper by, the valve.  
   
   
       8 . The assembly as claimed in  claim 1 , wherein the cap is located spaced apart from the body by a gap through which urine can enter the body.  
   
   
       9 . The assembly as claimed in  claim 1 , wherein the cap is adapted for removal from the cup, from within the urinal, whilst the cartridge assembly is installed in the urinal.  
   
   
       10 . A waterless urinal comprising: 
 a urinal bowl having an interior surface with an outlet opening therein; and    a removable cartridge assembly adapted to mount within the opening, the cartridge assembly having a substantially flat cap,    wherein the cartridge assembly is mounted with the cap substantially parallel to, and slightly proud of, the bowl surface adjacent to the outlet opening.    
   
   
       11 . The urinal as claimed in  claim 10 , wherein the cap is positioned above the adjacent bowl surface by a gap.  
   
   
       12 . The assembly as claimed in  claim 11 , wherein the cap is positioned about the adjacent bowl surface by approximately a 9 mm gap.  
   
   
       13 . The assembly as claimed in any one of claims  10 , wherein the cap is slightly convex into the interior of the urinal bowl.  
   
   
       14 . The assembly as claimed in  claim 11 , wherein the removable cartridge assembly has a scent block holder therein.  
   
   
       15 . The assembly as claimed in  claim 14 , wherein the cap is releasably connected to the scent block holder.  
   
   
       16 . A waterless urinal cartridge assembly removal and installation tool, the cartridge assembly comprising: a scent block; a scent block cup; a cap; and one-way valve, the tool comprising, 
 a first end adapted for selective engagement with one or more of the cup, scent block or cap, and    the second end adapted for selective engagement with the one-way valve.    
   
   
       17 . The tool as claimed in  claim 16 , wherein the first end comprises two manually expandable, spring retractable jaws.  
   
   
       18 . The tools claimed in  claim 16 , wherein the second end comprises a manually slidable, valve engagement and ejection device.