Patent ID: 8011266

Claim:
A gear for eliminating backlash, comprising: a rotatable shaft having a hollow portion; a first gear connected to an end of the rotatable shaft to be rotated in synchronization with the rotatable shaft, and having on a central portion thereof a connecting protrusion with a hole formed so as to communicate with the hollow portion of the rotatable shaft, with a pair of first mounting holes formed in the first gear along an arc thereof, wherein the first gear has a number of teeth; a second gear rotatably connected to the connecting protrusion of the first gear, and having a number of teeth equal to the number of teeth of the first gear; a pair of cylinders, with one cylinder provided in each of the first mounting holes, and each having a rod secured to the second gear, thus rotating the second gear in one direction; and a locking cap provided on an end of the connecting protrusion of the first gear to prevent the second gear from being eliminated from the first gear.