Patent ID: 8127494

Claim:
A self-adjusting chain adjustment trolley comprising: a translational assembly affixed to a chain tensioner assembly for translationally engaging a track, the translational assembly having a chain second end attachment point for engaging a chain second end; and a door attachment point affixed to the chain tensioner assembly for engaging a sliding door; wherein the chain tensioner assembly comprises a movable chain first end attachment point for engaging a chain first end and a force applicator attached thereto; a bar slidably receiving the movable chain first end attachment point; a bracket attached to the bar; and a rod having a first end fixedly attached to the bracket and a second end slidably engaged by the movable chain first end attachment point; the force applicator positioned between the bracket and the movable chain first end attachment point, such that the force applicator applies a predetermined amount of force to the movable chain first end attachment point to create a predetermined tension on the chain.