Patent ID: 9394151
Filing Date: 2016-07-19
CPC Classification: B66F

Claim Text:
1. A materials handling vehicle comprising: a support structure including a fixed member; a movable assembly coupled to said support structure; said support structure further comprising lift apparatus to effect movement of said movable assembly relative to said support structure fixed member, said lift apparatus including hydraulic structure comprising at least one ram/cylinder assembly, at least one hydraulic fluid line in communication with said at least one ram/cylinder assembly, and a hydraulic system that supplies a pressurized fluid to said at least one ram/cylinder assembly via said at least one hydraulic fluid line; and control structure to monitor a pressure of the pressurized fluid within said hydraulic structure and to implement a response routine if the monitored pressure of the pressurized fluid within said hydraulic structure falls below a threshold pressure during a lowering or lifting operation of the movable assembly.