Patent ID: 6189654
Filing Date: 2001-02-20
Classification: E06C

Abstract:
An extension ladder having a first ladder section adapted to provide a lower ladder section in use, a second ladder section adapted to provide an upper ladder section in use, the upper and lower ladder sections each having a pair of spaced ladder stiles with rungs extending between each said stile of a pair of stiles at locations along the ladder sections and both said ladder sections having the same width, the lower ladder section in use being located either forwardly or rearwardly of the upper ladder section, a clutch mechanism including two transversely spaced clutch arms fixed to a mounting axle extending across the ladder, wherein the clutch arms and the axle are secured to the lower ladder section, and the axle is mounted for rotation relative to the lower ladder section and the clutch arms extend between the ladder sections and are movable between a locked position for maintaining the upper ladder section at a desired extension relative to the lower ladder section and a released position allowing for movement of the sections relative to one another; and a clutch locking mechanism for biasing the clutch arms into the locked position, wherein the clutch locking mechanism is secured to a stile of the lower ladder section and the mounting axle, the stiles of each ladder section having formations for securing the sections relative to one another and allowing the upper section to be extended and retracted relative to the lower ladder section.