Fire escape – ladder – or scaffold – Convertible – Ladder
Reexamination Certificate
2005-03-15
2005-03-15
Thompson, II, Hugh B. (Department: 3634)
Fire escape, ladder, or scaffold
Convertible
Ladder
C182S167000, C182S228300
Reexamination Certificate
active
06866117
ABSTRACT:
A method for manufacturing a rail for a ladder. The method may include pultruding in a longitudinal direction, a rail having a selected cross-sectional shape. The rail may then be cut to a predetermined length at a distal end. A force may be applied, in a lateral direction, to the rail to form a curvature therein. The curvature may be characterized by a flared portion, a straight portion, and a curved region providing the transition therebetween. The rail may be held at the desired curvature for a time selected for the rail to take on the curvature substantially permanently. The force may then be removed and the rail may be assembled into a ladder.
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PCT International Search Report dated Jul. 19, 2004.
Thompson II Hugh B.
TraskBritt
Wing Enterprises, Inc.
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