Patent ID: 6729440
Filing Date: 2004-05-04
Classification: E06C

Abstract:
A ladder comprising:(a) a top seat having two surfaces, a top surface and a bottom surface, the top seat further having two ends, a first end and a second end, and the top seat further having two sides, a first side and a second side, (b) a first pair of legs comprising a first leg and a second leg, each leg having two ends, a top end and a bottom end, the top end of each leg of the first pair of legs being attached to the bottom surface of the top seat near the first side of the top seat, the bottom end of each leg of the first pair of legs being open, (c) a second pair of legs comprising a first leg and a second leg, each leg having two ends, a top end and a bottom end, the top end of each leg of the second pair of legs being attached to the bottom surface of the top seat near the second side of the top seat, the bottom end of each leg of the second pair of legs being open, (d) a plurality of rungs, each rung having two ends comprising a first end and a second end, the first end of each rung attached to the first leg of the first pair of legs, the second end of each rung attached to the second leg of the first pair of legs, each rung of the plurality of rungs being parallel to one another, the rungs being evenly spaced out from one another, (e) a middle support bar having two ends, a first end and a second end, the first end of the middle support bar being attached to the first leg of the first pair of legs, the second end of the middle support bar being attached to the first leg of the second pair of legs, (f) a quartet of adjustable legs, each adjustable leg having two ends, a top end and a bottom end, each adjustable leg being slidably insertable into the bottom end of a leg of the ladder, (g) means for locking each adjustable leg at a predetermined height, wherein the means for locking each adjustable leg at a predetermined height further comprises (i) a plurality of adjustment holes evenly spaced out along each adjustable leg, each hole being approximately two inches from adjacent holes, (ii) a locking mechanism attached to the bottom end of each leg of the first pair of legs and the second pair of legs, and (iii) wherein each locking mechanism is used to set the corresponding adjustable leg to a specific length, further wherein the locking mechanism attached to the bottom end of each leg of the first pair of legs and the second pair of legs further comprises (i) an outer casing, (ii) a pin inserted through the casing and through a particular adjustment hole, (iii) a coiled spring wrapped around the pin, (iv) wherein a user would pull the pin outward to move an adjustable leg up or down, and further wherein a user would stop pulling the pin outward to set the adjustable leg at a specific height, allowing the coiled spring wrapped around the pin to force the pin into an adjustment hole.