Patent ID: 8944211
Filing Date: 2015-02-03
Classification: E06C

Abstract:
1. A retractable ladder assembly comprising: a ladder having first and second spaced-apart stiles, the first stile coupled to the second stile via multiple stacked horizontally-disposed rungs, the first stile formed with a pivot opening and a first opening offset from the pivot opening, the first stile further formed with a second opening offset from the pivot opening in a direction other than the first opening; a first pivot received in the pivot opening to define a pivot point; a pivot arm having a first end for pivotally mounting to an elevator pit wall mount, and a second end pivotally mounted to the first stile via the first pivot; a pull-pin assembly mounted to the second end of the pivot arm, the pull-pin assembly having a user-grippable handle and a biased pin responsive to user actuation of the handle; wherein in a retracted state, the first opening in the first stile receives the biased pin to lock the ladder in a retracted position with respect to the elevator pit wall; and wherein in an extended state, the second opening in the first stile receives the biased pin to lock the ladder in an extended position with respect to the elevator pit wall; wherein the first pivot is disposed proximate a top portion of the ladder; a second pivot opening formed proximate a bottom portion of the ladder; and a second pivot received in the second pivot opening; and wherein the second pivot includes a hinge pivot arm having one end mounted to a second elevator pit wall mount, and a second end; and an electrical safety switch mounted to the second end of the hinge pivot arm, the switch including a biased plunger configured to slidably engage the hinge pivot arm to actuate the switch.