Source : Webster's Revised Unabridged Dictionary (1913)

Puller \Pull"er\, n.
   One who, or that which, pulls.

         Proud setter up and puller down of kings. --Shak.

Source : WordNet®

puller
     n 1: someone who applies force so as to cause motion toward
          herself or himself
     2: someone who pulls or tugs or drags in an effort to move
        something [syn: {tugger}, {dragger}]