Fire escape – ladder – or scaffold – Pole or strand grasping-type climber – Alternate grasping
Reexamination Certificate
2011-02-22
2011-02-22
Chin-Shue, Alvin C (Department: 3634)
Fire escape, ladder, or scaffold
Pole or strand grasping-type climber
Alternate grasping
Reexamination Certificate
active
07891465
ABSTRACT:
A tree climber's stand has at least one pin securing a tree encircling strand when the strand is being shortened or lengthened by a climber in order to level the tree stand. An anchoring block on an end of the strand has an elongated slot spanning more than one hole in the tree stand frame for receiving a pair of pins, one of which always extends through the slot to anchor the strand.
REFERENCES:
patent: 5097925 (1992-03-01), Walker, Jr.
patent: 5588499 (1996-12-01), Carriere
patent: 6068281 (2000-05-01), Szczypski
patent: 7802654 (2010-09-01), Tolliver et al.
patent: 2003/0132060 (2003-07-01), Goodwin, Jr.
Chin-Shue Alvin C
Kaplan Charles M.
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