Sealing means for stirring apparatus

In combination, a stirring apparatus including an elongate rod having stirrer blade means on one end thereof for disposition in a flask and the like to stir the contents of the flask and power means connected with the other end of the rod to rotate the rod and stirrer blade means, and a seal for effecting a liquid-tight seal between the stirring apparatus and an opening in a laboratory flask and the like, said seal including a generally tubular stopper for fitting in the opening of the flask, said stopper having a bore therethrough and external threads on one end thereof;

• a sleeve means having internal threads on both ends thereof and threadably engaged at one end thereof with the threads of the stopper and means for forming a positive seal between the threaded members;
• a bearing sleeve positioned within the bore defined in said stopper one end and having a shoulder thereon resting on the upper surface of said stopper one end;
• seal ring means positioned within the sleeve means in abutting engagement with the upper surface of said bearing sleeve shoulder;
• and a generally tubular seal clamping and adjusting means threadably engaged with the other end of the sleeve means and extended into engagement with the seal ring means to urge the seal ring means into secure sealing engagement with said rod extended coaxially through the stopper, sleeve means, seal ring means and seal clamping and adjusting means.