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US 7,395,899 B2Granted
Method and apparatus for reaching from outside an upper level of a tall structure
AssigneeExterior Elevator, LLC
InventorMarvin M. May
Life of this patent
Estimating the term…
Abstract
An embodiment of the invention is directed to a system having a pulley attached to a building. A closed loop of cable is installed around the pulley. The loop is of sufficient length so as to reach, when deployed outside of the building, below the pulley to where emergency personnel gather in an area next to a base of the building (when responding to a disaster situation in the building). A winch around which the loop is to be operatively installed is located in the area next to the base. Other embodiments are also described and claimed.
Claims6
A system comprising:
- a first fixed pulley attached to a non-portable structure;
- a second fixed pulley attached to a base of the structure below the first fixed pulley;
- a moveable pulley;
- a closed loop of cable installed around the first fixed pulley and the moveable pulley;
- a load attached to the loop;
- a traction winch around which the loop is operatively installed to lift the attached load;
- a cable connected to the moveable pulley and trained around the second fixed pulley, the cable operatively controlled to (i) draw the moveable pulley toward a side of the structure, thereby increasing tension in the loop so that the load, suspended by the loop, moves away from the side of the structure and (ii) allow the moveable pulley to move away from the side of the structure, thereby decreasing tension in the loop so that the suspended load moves toward the side of the structure.
4 more elements
Dependencies are inferred from the claim text.