Patent ID: 8596416
Filing Date: 2013-12-03
Classification: E06C,Y02B

Abstract:
1. A system configured to lift or lower a carriage device via a ladder climbing structure, comprising: a rigging movable in a substantially vertical direction; a carriage device configured to enclose and transport a payload and adapted to be lifted and lowered along at least one rail of the ladder climbing structure; an apparatus coupled to the rigging and adapted to translate rigging movement into an ascent or descent of the carriage device; a receiver operable to receive signals indicative of a change in state of the carriage device; a control mechanism coupled to a power source and communicatively coupled with the receiver to control power delivery to the rigging based on a detected change in state of the carriage device, and an input mechanism operable to receive a signal indicating whether the system is operating in a tool lifting mode or a personnel assist mode, wherein the system is configured to prevent operation to lift a person when the signal indicates that the system is operating in the tool lifting mode.