US Patent 7665939 Retractor anchor with top release

A retractor anchor for releasably engaging a track. The retractor anchor has a body member which is slidably receivable on the track, and a plunger, which is moveably connected to the body member. A release member is connected to the plunger for moving the plunger between an engaged position, wherein the plunger engages the track to restrain the body member from sliding with respect to the track, and a disengaged position, wherein the body member is slidable with respect to the track. A mounting member is connected to the body member for mountably receiving an attachment for rotation of the attachment around the release member.