Bridges – Gangway – ramp – or dock leveler
Reexamination Certificate
2011-06-14
2011-06-14
Hartmann, Gary S (Department: 3671)
Bridges
Gangway, ramp, or dock leveler
C119S847000, C119S849000
Reexamination Certificate
active
07958586
ABSTRACT:
A roll out multi-tread ramp design supported by its arched design and the preferably identical shape and angle of each of its multiple treads abutting one another creating a surface area that distributes stress from weight placed on the surface of the ramp. Oblong links comprise preferably two holes per link and hold each tread that abut one another together, a cylindrical pin inserts snugly through an end of each ramp tread, passes through the link hole, then preferably re-enters tread of the ramp which connects multiple treads together and creates strength when weight is placed on ramp and allows the ramp to be rolled up. Ramp length is adjustable by using varying numbers of treads in each ramp assembly. An elastic cord runs through all treads to assist with self-deployment of ramp and assists in holding ramp treads in place.
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Hartmann Gary S
Rinner Todd E.
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