Patent ID: 8292039

Claim:
A mast lift comprising: a mast supported on a mast base; a work platform movably secured to the mast; 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: at least one lifting rope connected between the work platform and the mast via a brake frame and a hoist drum connected to the work platform, wherein the brake frame is displaced between an engaged position and a disengaged position based on an amount of tension on the lifting rope, a spring connected to the brake frame and urging the brake frame toward the engaged position, and a carriage latch assembly including a carriage latch hook coupled with the brake frame and a pin secured to the mast, wherein when the tension on the lifting rope is lost upon the work platform reaching a bottom of travel, the brake frame is disposed in the engaged position, and the carriage latch hook is displaced into engagement with the pin, and an idler roller cooperable with the brake frame and displaceable with the brake frame between the engaged position and the disengaged position, wherein the idler roller is biased toward the engaged position, and wherein the lifting rope is cooperable with the idler roller such that tension on the lifting rope maintains the brake frame in the disengaged position.