Patent ID: 8505688

Claim:
A mast lift comprising: a mast supported on a mast base; a work platform movably secured to the mast; and a lift system coupled between the work platform and the mast, the lift system effecting raising and lowering of the work platform on the mast and including: an overload clutch that slips upon at least one of an overload on the lift system or at end of travel, an overrun brake that prevents the lift system from running beyond a fully lowered position, an emergency brake biased toward an engaged position, at least one lifting rope windable on a hoist drum from one end and secured to the mast at an opposite end, and an idler roller coupled with the emergency brake and disposed between the opposite end of the mast and the hoist drum, the idler roller being cooperatively engageable with the at least one lifting rope such that the tension in the lifting rope displaces the idler roller to maintain the emergency brake in a disengaged position.