Abstract: An elevating platform assembly (50) comprises a pair of laterally spaced, generally vertical masts (52). A drive mechanism (100) is coupled to each mast (52) and is moveable upwardly and downwardly along the masts. An elongated elevating platform (58) extends between the masts. A connection frame (150) couples each end of the elevating platform to a respective one of the drive mechanisms (100). Each connection frame (150) is pivotally coupled to the drive mechanism (100).

Abstract: An elevating platform assembly (50) comprises a pair of laterally spaced, generally vertical masts (52). A drive mechanism (100) is coupled to each mast (52) and is moveable upwardly and downwardly along the masts. An elongated elevating platform (58) extends between the masts. A connection frame (150) couples each end of the elevating platform to a respective one of the drive mechanisms (100). Each connection frame (150) is pivotally coupled to the drive mechanism (100).

Abstract: A braking device for an elevated platform assembly comprising a platform moveable along a generally vertical mast supporting an upright rack comprises an input gear assembly in mating engagement with the rack, a centrifugal actuator communicating with the input assembly and a spring-loaded brake responsive to the centrifugal actuator. The spring-loaded brake engages the rack and arrests the platform when the platform descends the mast at a rate above an upper threshold limit.

Abstract: A braking device for an elevated platform assembly comprising a platform moveable along a generally vertical mast supporting an upright rack comprises an input gear assembly in mating engagement with the rack, a centrifugal actuator communicating with the input assembly and a spring-loaded brake responsive to the centrifugal actuator. The spring-loaded brake engages the rack and arrests the platform when the platform descends the mast at a rate above an upper threshold limit.

Abstract: An elevating platform assembly includes a generally vertical mast having a generally vertical rack mounted thereon. A first trolley is coupled to the mast and is moveable therealong. A drive mechanism is carried by the first trolley and includes at least one pinion in mating engagement with the rack. An elongated elevating platform extends from the mast and has a second trolley mounted adjacent one end thereof. The second trolley couples the elevating platform to the mast and is moveable along the mast. The first trolley is coupled to at least one of the second trolley and elevating platform in a manner to maintain alignment of the at least one pinion and rack when loads are placed on the elevating platform that create moments at the mast.