US 12,312,047 B2
Powered retractable ladder
Robert Bolline, Largo, FL (US); Scott Danforth, Largo, FL (US); Matthew Freeburg, Largo, FL (US); Scott Milford, Largo, FL (US); Art Sciarrotta, Largo, FL (US); Steven Gioiosa, Clearwater, FL (US); Mike Krawczyk, Clearwater, FL (US); Keith Stephens, Clearwater, FL (US); Nat McCormick, Cleartwater, FL (US); and Benedict Capuco, Arlington, VA (US)
Assigned to Nautical Structures Industries, Inc., Largo, FL (US)
Filed by Nautical Structures Industries, Inc., Largo, FL (US)
Filed on May 5, 2022, as Appl. No. 17/662,110.
Claims priority of provisional application 63/186,921, filed on May 11, 2021.
Prior Publication US 2022/0363347 A1, Nov. 17, 2022
Int. Cl. B63B 27/14 (2006.01)
CPC B63B 27/146 (2013.01) 15 Claims
OG exemplary drawing
 
1. A stowable ship ladder comprising:
two chains, each chain formed from a plurality of links;
the two chains bridged by a plurality of steps;
each chain of the two chains able to bend between a first position and a second position;
the first position being straight;
the second position being curved in a single direction;
each chain of the two chains only able to bend between the first position and the second position; and
a first hydraulic motor mechanically connected to a first cog gear;
the first hydraulic motor rotating the first cog gear, in turn causing upward or downward motion of the two chains, retracting or extending the two chains;
whereby when the two chains are extended along a side of a ship, the two chains can only curve toward the ship, and not away from the ship.