Fire escape – ladder – or scaffold – Platform with elevating or lowering means
Reexamination Certificate
2008-12-08
2011-12-20
Shue, Alvin Chin (Department: 3634)
Fire escape, ladder, or scaffold
Platform with elevating or lowering means
C182S020000, C182S069300, C182S069600, C182S133000, C182S187000, C187S240000, C187S242000
Reexamination Certificate
active
08079444
ABSTRACT:
A transportable, self-erecting, battery powered, vertical lift assembly includes a wheeled frame with a towing attachment mechanism. A linear guide member with an exterior roller chain member is pivotally secured to the frame. A carriage member with attached platform member is movably mounted to the linear guide member adjacent the frame. The carriage member includes an attached drive mechanism with a battery powered DC motor driving a gear unit operatively connected to a sprocket, which engages the roller chain member on the linear guide member. The carriage member and attached platform member are movable along the linear guide member by the drive mechanism to pivot and elevate the guide member, which engages a vertical support structure, and to elevate the carriage member and attached platform member. A safety brake assembly immobilizes the carriage member with respect to the linear guide member upon relative movement between the carriage member and drive mechanism.
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Rands William J.
Schumacher Michael S.
Chin Shue Alvin
Elevated Technologies, LLC
Quinn Colleen M
Randall Tipton L.
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