Dynamic hinge for ladder

Details Dynamic hinge for ladder Dynamic hinge for ladder

2007-12-11

2007-12-11

Chin-Shue, Alvin (Department: 3634)

Fire escape, ladder, or scaffold

Unitary foldable, rigid scaffold or ladder

Collapsible ladder

C016S357000

Reexamination Certificate

active

11104584

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.

REFERENCES:
patent: 139004 (1873-05-01), Hardenbrook et al.
patent: 306974 (1884-10-01), Stowe
patent: 1102682 (1914-07-01), Ping
patent: 1587383 (1926-06-01), Kennett
patent: 2834528 (1958-05-01), Couse
patent: 3065498 (1962-11-01), Johnson
patent: 3811151 (1974-05-01), Kuemmerlin
patent: 4566150 (1986-01-01), Boothe
patent: 4787476 (1988-11-01), Lee
patent: 4821843 (1989-04-01), Planchon
patent: 5956810 (1999-09-01), Spaeth
patent: 6292981 (2001-09-01), Ford et al.
patent: 6945621 (2005-09-01), Shin
patent: 2003/0217888 (2003-11-01), Simpson et al.

Affiliated with

Also associated with

Rating

Dynamic hinge for ladder does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Dynamic hinge for ladder, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dynamic hinge for ladder will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3875070