Patent ID: 9458001
Filing Date: 2016-10-04
CPC Classification: B62B,B66F

Claim Text:
1. A powered pallet truck comprising: a head section including a drive unit and at least one drive wheel; a fork assembly comprising at least one fork, each fork comprising at least one load wheel movable between a retracted position and an extended position, a first turning radius of the powered pallet truck on a work surface being determined by a distance between the at least one drive wheel and the at least one load wheel when the at least one load wheel is engaged with the work surface; at least one intermediate roller disposed on the at least one fork between the at least one load wheel and the at least one drive wheel, the at least one intermediate roller being movable between an engagement position and a retracted position, a second turning radius of the powered pallet truck being determined by a distance between the at least one drive wheel and the at least one intermediate roller when in the engagement position; a first hydraulic actuator pivotably coupled to an axle of the at least one load wheel to move the at least one load wheel between a retracted position and an extended position; a second hydraulic actuator pivotably coupled to an axle of the at least one intermediate roller to move the at least one intermediate roller between the retracted position and the engagement position; a hydraulic system providing a hydraulic pressure source; and a diverter valve in communication with the hydraulic system and the first and second hydraulic actuators to selectively place either the first or second hydraulic actuator in fluid communication with the hydraulic pressure source.