Patent ID: 8500789

Claim:
A device for moving an elongate member relative to an elongate body through which it at least partially extends, the device comprising: a housing connectable to the elongate body; a mover associated with the housing and connectable to the elongate member for moving the elongate member relative to the housing and relative to a connected elongate body; a limiter for limiting the extent of movement of the elongate member relative to the elongate body, the limiter including a band of substantially inextensible material which is connected at one end to, and is wound on, a spool which is mounted to the housing, the band being connected at the other end to a winding member of the mover onto which the band is wound from the spool as the mover moves the elongate member, thereby permitting movement of the mover until the band is fully unwound from the spool and thereafter preventing further movement of the elongate member by the mover; and a pre-mover for effecting a pre-movement adjustment of the elongate member connected to the mover relative to the elongate body connected to the housing, to reduce slack between the elongate member and the elongate body in preparation for moving the elongate member with the mover, to ensure direct subsequent relative movement between the elongate member and the elongate body by the mover, the pre-mover being configured to become inoperable following pre-movement adjustment of the elongate member, wherein the housing forms a sealed unit in which the mover and pre-mover are mounted to be actuated by a user.