公开(公告)号：US10184293B1

公开(公告)日：2019-01-22

申请号：US14665456

申请日：2015-03-23

Applicant: Amazon Technologies, Inc.

Inventor： David Bruce McCalib, Jr. ,  Jeffrey L. Weeks ,  Aimee Constantine

IPC: E06C9/12

Abstract: A ladder unit is slidably joined to an edge of or beneath a working surface by a mounting frame having a roller assembly or other slidable means. The ladder unit includes a stair assembly that is rotatably mounted to the mounting frame by a hinge, and configured to rotate between an open position, in which a support provided on the stair assembly does not contact the working surface, and a closed position, in which the support contacts the working surface. In this regard, the ladder unit may be slidably moved from location to location along the working surface when the stair assembly is in the open position with substantially low friction, and may be stabilized in a location for use when the stair assembly is in the closed position.