Sink stopper assembly

Abstract

A sink stopper assembly includes cup and basket strainers. The cup strainer includes a bottom wall having a positioning hole, and a shoulder portion forming a seat member. The basket strainer is disposed in the cup strainer, and includes a receiving space, a handle extending upwardly from a base wall, a sealing ring to be seated against the seat member, and a retaining stem extending downwardly from the base wall to penetrate the positioning hole. The retaining stem includes a bent metal plate which has two opposite elastic arms, at least one upper protrusion, at least one lower protrusion, and a recess defined between the upper and lower protrusions.

I claim:  
     
         1 . A sink stopper assembly comprising: 
 a cup strainer including a bottom wall having a positioning hole, a tubular portion extending upwardly from said bottomwall, a peripheral wall extending above said tubular portion, and a shoulder portion connected between said tubular portion and said peripheral wall, said shoulder portion forming a seat member at a juncture of said shoulder portion and said tubular portion; and    a basket strainer disposed in said cup strainer, said basket strainer including a base wall above said bottom wall, a surrounding wall extending upwardly from said base wall, a receiving space cooperatively defined by said base wall and said surrounding wall, a handle extending upwardly from said base wall, a sealing ring connected to said base wall and to be seated against said seat member, and a retaining stem extending downwardly from said base wall to penetrate said positioning hole, said retaining stem including a bent metal plate which has two opposite elastic arms, at least one upper protrusion projecting outwardly from at least one of said elastic arms, at least one lower protrusion projecting outwardly from said at least one of said elastic arms below said upper protrusion, and a recess defined between said upper and lower protrusions.    
     
     
         2 . The sink stopper assembly as claimed in  claim 1 , wherein said bent metal plate further comprises a substantially U-shaped bottom end part extending downwardly from and connected to said elastic arms, a pair of diverging parts extending upwardly and respectively from said elastic arms, and a pair of opposite top arms extending upwardly and respectively from said diverging parts and fixed to said base wall.  
     
     
         3 . The sink stopper assembly as claimed in  claim 1 , wherein said bent metal plate includes a pair of said upper protrusions projecting outwardly and respectively from said elastic arms, a pair of said lower protrusions projecting outwardly and respectively from said elastic arms below said upper protrusions, and a pair of said recesses each defined between one of said upper protrusions and one of said lower protrusions.  
     
     
         4 . The sink stopper assembly as claimed in  claim 2 , wherein said upper protrusion is formed below and is spaced apart from said diverging parts.