Patent ID: 7694389

Claim:
An assembly comprising: a housing having a cavity adapted for receiving a leaf therein and a cavity opening adapted to receive the leaf therethrough to permit the leaf to extend into the cavity, the housing further comprising a slotted plate disposed over the cavity opening, the slotted plate having a slot adapted to receive the leaf therethrough; a threaded nut positioned at least partially within the housing such that the nut is fixed against rotation with respect to the housing, wherein the threaded nut is adapted to engage the leaf when the leaf is received in the cavity; a screw having a threaded portion and a geared portion, the threaded portion threadably engaging the nut; and a gear member engaging the geared portion of the screw and adapted to be manipulated by a user, wherein rotation of the gear member causes rotation of the screw, and rotation of the screw moves the threaded nut axially within the housing, wherein movement of the threaded nut is adapted to move the leaf within the cavity.