#$%^&*AU2012100546A420120607.pdf#####4 Abstract This innovation patent discloses an anti-pet lost device, including the chain ring, fixed cover set on the chain ring, and the resistance rod installed in the fixed cover and there is a regulator set on the chain ring. Tie the chain ring on the pet through setting resistance rod on the chain ring, and the chain ring is light and would not affect the pets moving. The pets are in the courtyard, and this device can effectively keep smallsized pets inside the railing, so that they are kept away from the outside of the courtyard. This device has a simple structure, and it is unnecessary for people to worry that pets in the courtyard would lose.cv)
