Posting ladder

Details Posting ladder Posting ladder

2006-05-16

2006-05-16

Thompson, II, Hugh B. (Department: 3634)

Fire escape, ladder, or scaffold

Ladder

With hook or grab

C182S107000, C248S211000

Reexamination Certificate

active

07044270

ABSTRACT:
A hook attachment for a ladder is provided and includes a pair of curved members, each of the curved members being formed in a tapered shape having a base portion of a first cross-sectional area and a tip portion of a second cross-sectional area smaller than the first cross-sectional area. A cross-sectional area between the base portion and the tip portion decreases in a substantially continuous manner in a direction from the base portion to the tip portion.

REFERENCES:
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patent: 2872717 (1959-02-01), Kelley
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patent: 4279327 (1981-07-01), Warren
patent: 4531613 (1985-07-01), Keigher
patent: 5601154 (1997-02-01), Eisenmenger
patent: 6167988 (2001-01-01), Frodge et al.

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