#$%^&*AU2019203004B120190912.pdf#####ABSTRACT A line pull assembly 10 for a prosthetic delivery device is disclosed. The assembly comprises: a rail assembly 250 defining a rail cavity 290 and having a longitudinal axis 251 and a hand-gripable slider assembly 1000. The slider is mounted to the rail assembly for sliding movement along it. The slider has a body 1100 slidably mounted to the rail assembly, the body having an inner body portion 1150 within the rail cavity. A line receiver 1170 for receiving a pullable line 1032 sits within the inner body portion. A release ring 1600 is mounted around the rail assembly and is operably connected to the inner body portion. The slider is locked against sliding movement until the release ring is moved the unlocked position. In the unlocked position, the inner body portion is slideably moveable by sliding movement of the release ring to transfer a pulling force through the line receiver.