Fire escape – ladder – or scaffold – Wall- or floor-attached – Ladder
Reexamination Certificate
2004-05-24
2009-12-29
Chin-Shue, Alvin C (Department: 3634)
Fire escape, ladder, or scaffold
Wall- or floor-attached
Ladder
C182S204000
Reexamination Certificate
active
07637350
ABSTRACT:
The portable barge access ladder has a pair of coaming frame members positioned outside of a barge coaming with a plurality of safety treads there-between forming a coaming ladder portion. The ladder includes transverse frame members extending across the barge coaming with a decking tread member there-between forming a walkway for the operator to easily traverse the coaming. Angled hold frame members extend into the barge hold with conventional safety treads there-between at least partially forming a hold access ladder portion. The ladder includes adjustable legs slidably received in the hold frame members with one or more auxiliary treads attachable to the legs forming optional additional treads for the ladder as the legs are extended. The removable auxiliary treads will be used where the legs are extended beyond standard tread spacing. A combing securing mechanism is provided to prevent ladder lateral slippage during use.
REFERENCES:
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patent: 6533069 (2003-03-01), Couillard
patent: 6769513 (2004-08-01), Pettit
patent: 6907957 (2005-06-01), Couch
BLK Law Group
Chin-Shue Alvin C
Interstate Equipment Corporation
Shideler Blynn L.
Shideler Krisanne
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