Patent ID: 6719093
Filing Date: 2004-04-13
Classification: E06C

Abstract:
A portable extension ladder comprising:a single central support mast; a first elongated tubular section of the mast having an interior, an exterior, a top end, and a bottom end; a second elongated tubular section of the mast having a top end, a bottom end, an interior, and an exterior, the exterior having front and back sides; the first tubular section slidably nested in the interior of the second tubular section and extending from the bottom end of the second tubular section; a section slide stopping mechanism that releasably fixes the first tubular section in an extended position from the second tubular section; a bottom step mounted on the bottom end of the first tubular section; a middle step slidably captured on the exterior of the first tubular section between the bottom step and the top end of the first tubular section; and a middle step slide stopping mechanism that releasably fixes the middle step at an intermediate position on the first tubular section between the bottom step and the top end of the first tubular section.