Vandal resistant push-pull drain stopper

A vandal resistant push-pull drain stopper for use with a drain plug adapted to be mounted in an outlet opening of a bathtub or other similar vessel, said drain stopper comprising:

• a plunger having a generally cylindrical bore and a seat portion therein;
• a stem having a polygonal head at one end thereof, said stem at the opposite end thereof adapted to be threadably coupled to said drain plug and coaxially disposed therein, said one end of said stem being slidably disposed within said generally cylindrical bore of said plunger, said item further including an annular reduced portion and an annular channeled portion between said opposite ends;
• an O-ring disposed around said stem;
• retaining means for retaining said O-ring against said seat portion;
• said plunger being selectively moveable axially between a closed position wherein said O-ring surrounds said reduced portion of said stem, an open position wherein said O-ring surrounds said channeled portion of said stem and a removal position;
• a knob threadably coupled to said plunger having a polygonal bore for engaging said polygonal head of said stem when said plunger is in said removal position and a relief area within which said polygonal head can freely rotate when said plunger is in said open and closed positions;
• and
• sealing means disposed peripherally about said plunger adapted to seal against said drain plug when said plunger is in said closed position;
• whereby rotation of said knob when said plunger is in said removal position causes said stem to rotate with respect to said drain plug and rotation of said knob when said plunger is in said open and closed positions causes said plunger to rotate freely about said stem.

A vandal resistant push-pull drain assembly for use with a bathtub or other similar vessel having a drain, said drain assembly comprising:

• a drain plug adapted to be mounted in an outlet opening of a bathtub or other similar vessel;
• a plunger having a generally cylindrical bore and a seat portion therein;
• a stem having a polygonal head at one end thereof, said stem at the other end thereof being threadably coupled to said drain plug and coaxially disposed therein, said one end of said stem being slidably disposed within said generally cylindrical bore of said plunger, said stem further including an annular reduced portion and an annular channeled portion between said opposite end;
• an O-ring disposed around said stem;
• retaining means for retaining said O-ring against said seat portion;
• said plunger being selectively moveable axially between a closed position wherein said O-ring surrounds said reduced portion of said stem, an open position wherein said O-ring surrounds said channeled portion of said stem and a removal position;
• a knob threadably coupled to said plunger having a polygonal bore for engaging said polygonal head of said stem when said plunger is in said removal position and a relief area within which said polygonal head can freely rotate when said plunger is in said open and closed positions;
• and
• sealing means disposed peripherally about said plunger for sealing against said drain plug when said plunger is in said closed position;
• whereby rotation of said knob when said plunger is in said removal position causes said stem to rotate with respect to said drain plug and rotation of said knob when said plunger is in said open and closed positions causes said plunger to rotate freely about said stem.