Dynamic hinge for ladder
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United States of America Patent
Stats
-
Dec 11, 2007
Grant Date -
Aug 18, 2005
app pub date -
Apr 13, 2005
filing date -
Sep 22, 2003
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A dynamic hinge includes a first member connected to a first ladder portion of a ladder, and a second member connected to a second ladder portion. The first member pivots relative to the second member about a pivot axis that does not intersect both the first and second members. The first member includes first and second parallel segments, and the second member includes a third and fourth parallel segments. A guide plate is attached to either the first or second member, and the guide plate is positioned between the first and second segments and between the third and fourth segments. The guide plate includes two non-linear slots, and an other of the first and second members includes two pins, respectively adapted to slide within the two non-linear slots. The pins extend between either the first and second segments or the third and fourth segments.
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