Safety step ladder with supported reach
View Patent ↗A safety step ladder is formed of a climb leg and a support leg, and includes a specialized hinging arrangement to attach the support leg to the climb leg at a location below the midpoint of the climb leg such that the top portion of the climb leg somewhat overhangs the support leg. The specialized hinging arrangement is also configured so that the support leg is raised upward when closing against the climb leg (ensuring that in the closed position the support leg does not extend below the climb leg), providing a compact configuration for storage purposes.
1. A step ladder comprising
a climb leg defined as comprising a top termination and an opposing ground termination, the climb leg including a hinging position closer to the ground termination than the top termination;
a specialized hinging arrangement; and
a support leg attached to the climb leg at the hinging position by the specialized hinging arrangement such that when the support leg is fully extended by the specialized hinging arrangement, a top portion of the climb leg overhangs the support leg;
wherein the specialized hinging arrangement comprises
a pair of rotatable link arms connected between upper terminations of the support leg and a connector location on the climb leg, the connector location disposed above the hinging position and determined, in combination with dimensions of the pair of rotatable link arms, to ensure that the bottom terminations of the support leg do not extend below the climb leg when the specialized hinging arrangement is in the closed position.
2. The step ladder as defined in claim 1 wherein the climb leg further comprises
a wide stance stabilizer attached to a lower termination of the climb leg to define the opposing ground termination of the climb leg, the stabilizer having a width W greater than a separation S between side rails of the climb leg.
3. The step ladder as defined in claim 1 wherein the climb leg further comprises releasable clips for holding the pair of rotatable link arms against the climb leg when the step ladder is in the closed position.
4. The step ladder as defined in claim 3 , wherein the specialized hinging arrangement further comprises a pair of rotatable spreader arms connected between the climb leg and the support leg at a position below the pair of rotatable link arms, the releasable clips for holding the pair of rotatable spreader arms against the climb leg when the step ladder is in the open position.
5. The step ladder as defined in claim 1 wherein the upper terminations of the support leg include bracket members for supporting portions of the climb leg when in the open position.
6. The step ladder as defined in claim 5 wherein the bracket members include an outer plate for capturing a portion of the climb leg in the open position, minimizing lateral movement of the climb leg with respect to the support leg.
7. The step ladder as defined in claim 1 wherein the step ladder further comprises a standing platform releasably attached to the top termination of the climb leg.
8. The step ladder as defined in claim 1 wherein the support leg further comprises a pair of opposing side rails and a plurality of bracing elements disposed between the pair of opposing side rails of the support leg.