Stone holding downstem end

Abstract

The stone holding downstem end is a modification to a standard downstem end to enable it to hold a porous stone. A standard downstem end is a full circle and only allows the stone to be heated from above. By subtracting material from the receiving end of the downstem we create a new downstem end that is not receptive to a standard bowl anymore, but is instead specially modified to hold a porous stone. With the modification the user can heat the stone from the side rather from just above. This increases the potential for material to be vaporized and less chance for the material to melt through.

1 . A bowl receiving end of a downstem consisting of:
 a tube such that said tube has a subtraction section starting from the receiving end of the tube; said subtraction is less than 50% of the arc of the circumference of the tube.   
     
     
         2 . A bowl receiving end of a downstem consisting of:
 a tube such that said tube has 2 or more non-adjacent subtraction section starting from the receiving end of the tube; said subtractions have subtraction depths less than the length of the tube and have individual subtraction arcs less than 50% of the circumference.   
     
     
         3 . The invention in  claim 1  where the subtraction depth equals the full length of the tube. 
     
     
         4 . The invention in  claim 1  where the subtraction depth is less than the length of the tube.