Sink Drain Device

Abstract

A sink drain device includes a tubular main body having a tubular surrounding wall that extends along an axis and that defines a drain channel, and a strainer detachably mounted in the tubular main body. The tubular surrounding wall has an internal thread. The strainer has opposite upper and lower surfaces, a side surrounding surface extending downwardly from a periphery of the upper surface, a non-circular operating hole formed in the upper surface and registered with the axis, a plurality of drain holes extending through the upper and lower surfaces and surrounding the operating hole, and an external thread formed on the side surrounding surface, and being threadedly and removably connected to the internal thread.

What is claimed is: 
     
         1 . A sink drain device comprising:
 a tubular main body having a tubular surrounding wall that extends along an axis and that defines a drain channel, said tubular surrounding wall having a top end, a bottom end that is opposite to said top end, and an internal thread that is formed adjacent to said top end; and   a strainer detachably mounted in said tubular main body, and having an upper surface, a lower surface that is opposite to said upper surface, a side surrounding surface that extends downwardly from a periphery of said upper surface, a non-circular operating hole that is formed in said upper surface and that is registered with the axis, a plurality of drain holes that extend through said upper and lower surfaces and that surround said operating hole, and an external thread that is formed on said side surrounding surface and that is threadedly and removably connected to said internal thread of said tubular main body.   
     
     
         1 . The drain device as claimed in  claim 1 , wherein said operating hole of said strainer is a hexagonal hole. 
     
     
         3 . The sink drain device as claimed in claim  2 , wherein said operating hole extends through said upper and lower surfaces along the axis. 
     
     
         3 . The sink drain device as claimed in  claim 3 , wherein said strainer includes:
 a top wall having said upper and lower surfaces, said operating hole, and said drain holes; and   an annular extending downwardly from a periphery of said top wall, and having said side surrounding surface and said external thread.   
     
     
         5 . The sink drain device as claimed in claim  4 , wherein said tubular main body further has a top surface disposed above said top end of said tubular surrounding wall, and a drain indentation formed in said top surface and communicating with said drain channel, said internal thread being formed under said drain indentation, a diameter of said drain indentation being larger than a diameter of said drain channel, said sink drain device further comprising plug removably and tightly engageable with said drain indentation. 
     
     
         6 . The sink drain device as claimed in  claim 5 , wherein said tubular main body further has a flange extending radially and outwardly from said top end of said tubular surrounding wall, and having said top surface and said drain indentation. 
     
     
         7 . The sink drain device as claimed in  claim 3 , wherein said tubular main body further has a top surface disposed above said top end of said tubular surrounding wall, and a drain indentation formed in said top surface and communicating with said drain channel, said internal thread being formed under said drain indentation, a diameter of said drain indentation being larger than a diameter of said drain channel, said sink drain device further comprising a plug removably and tightly engageable with said drain indentation. 
     
     
         7 . The sink drain device as claimed in  claim 7 , wherein said tubular main body further has a flange extending radially and outwardly from said top end of said tubular surrounding wall, and having said top surface and said drain indentation. 
     
     
         9 . The sink drain device as claimed in claim  2 , wherein said tubular main body further has a top surface disposed above said top end of said tubular surrounding wall, and a drain indentation formed in said top surface and communicating with said drain channel, said internal thread being formed under said drain indentation, a diameter of said drain indentation being larger than a diameter of said drain channel, said sink drain device further comprising a plug removably and tightly engageable with said drain indentation. 
     
     
         10 . The sink drain device as claimed in  claim 9 , wherein said tubular main body further has a flange extending radially and outwardly from said top end of said tubular surrounding wall, and having said top surface and said drain indentation. 
     
     
         11 . The sink drain device as claimed in  claim 1 , wherein said tubular main body further has a top surface disposed above said top end of said tubular surrounding wall, and a drain indentation formed in said top surface and communicating with said drain channel, said internal thread being formed under said drain indentation, a diameter of said drain indentation being larger than a diameter of said drain channel, said sink drain device further comprising a plug removably and tightly engageable with said drain indentation. 
     
     
         12 . The sink drain device as claimed in  claim 11 , wherein said tubular main body further has a flange extending radially and outwardly from said top end of said tubular surrounding wall, and having said top surface and said drain indentation. 
     
     
         13 . A sink drain device comprising:
 a tubular main body having a tubular surrounding wall that extends along an axis and that defines a drain channel, said tubular surrounding wall having a top end, a bottom end that is opposite to said top end, and a locking portion that is formed adjacent to said top end; and   a strainer detachably mounted in said tubular main body, and having an upper surface, a lower surface that is opposite to said upper surface, a side surrounding surface that extends downwardly from a periphery of said upper surface, a plurality of drain holes that extend through said upper and lower surfaces, and a locking section that is formed on said side surrounding surface and that engages removably said locking portion of said tubular main body.   
     
     
         14 . The sink drain device as claimed in  claim 13 , wherein one of said locking portion of said tubular main body and said locking section of said strainer is a protrusion, and the other one of said locking portion of said tubular main body and said locking section of said strainer is a groove. 
     
     
         15 . The sink drain device as claimed in  claim 14 , wherein said strainer includes:
 a top wall having said upper and lower surfaces, and said drain holes; and   an annular wall extending downwardly from a periphery of said top wall, having said side surrounding surface and said locking section, and formed with a plurality of slots that extend upwardly from a bottom end thereof and that extend radially therethrough.