Patent ID: 6543579
Filing Date: 2003-04-08
Classification: E04G,E06C

Abstract:
A length-adjustable ladder functioning as a telescopic lean-to ladder, a free-standing stepladder, and as a platform, comprising:stringers each having a top end and an outer longitudinal side; ladder rungs fastened between said stringers; supports connected to said stringers, said supports configured such that said supports can be length-adjusted in a stepless manner; diagonal ties and struts adjustable in a stepless manner and connected to said supports such that said supports can be pivoted out in a plurality of directions and secured, said supports can be swung in and arrested on said outer longitudinal sides of said stringers; a floor board assembly formed of two panel halves corresponding to a length of the ladder and having hinges disposed on said two panel halves, said two panel halves each having a longitudinal side fastened, in an articulated manner on said ladder rungs by said hinges, each of said two panel halves having slot-shaped through-passages formed therein corresponding to rung spacings and through which rung hooks of a further ladder can be guided in order to hook the rung hooks onto said rungs; arresting elements, each of said arresting elements running through one of said two panel halves, said two panel halves movable into a swung-up panel position wherein said two panel halves being arrested by said arresting elements, each of said arresting elements having a fastening nut, a compression spring disposed between said fastening nut and an underside of a respective one of said panel-halves, and a rotatable segment plate for engaging over an outside of a respective one of said stringers; and guide profiles disposed at said top ends of said stringers, said guide profiles jutting out to a side on which said floor board assembly is fitted.