Patent ID: 7465244

Claim:
A power transmission device for a utility vehicle, comprising: a) a sleeve supporting a first sheave member having a first face; b) a hub received through said sleeve and moveable axially in relation thereto, said hub supporting a second sheave member having a second face opposite said first face such that said first and second faces define therebetween a groove adapted to receive a belt and relative axial movement between said sleeve and said hub being adapted to vary at least one of pitch diameter and grip imparted to said belt from said sheeves; c) an actuator mechanism adapted, through control of relative axial displacement between said sleeve and said hub, to vary at least one of said pitch and grip, said actuator mechanism comprising a control rod disposed substantially perpendicularly to the line of action of said axial displacement and connected to said hub through a link mechanism, said control rod being adapted to move and said link mechanism being adapted to translate movement of said control rod into relative axial displacement of said hub, wherein said link mechanism includes a threaded boss and said control rod comprises a threaded portion that is engaged in use with said boss and adapted to translate rotation of said control rod into linear displacement of said boss along said control rod; wherein a drive transmission arrangement includes d) a plurality of shafts adapted to run substantially parallel to each other and substantially transverse to forward motion of said vehicle, one or more of said shafts being adapted to operate materials handling equipment; e) a rotational drive to an input wheel drivingly connected to a first said shaft; f) a first variable pitch drive transmission device drivingly connected to said first shaft on a first side of said vehicle and adapted to power a first drive belt; g) a second variable pitch drive transmission device drivingly connected on said first side of said vehicle to a second said shaft and by said first drive belt to said first variable pitch drive transmission device; h) a first fixed pitch drive wheel drivingly connected to said second shaft on a second side of said vehicle, opposite to said first side, and adapted to power a second drive belt; and i) a second fixed pitch drive wheel drivingly connected to a third said shaft on said second side of said vehicle and by said second drive belt to said first fixed pitch drive wheel at a fixed ratio.