Portable tree climbing device

Details Portable tree climbing device Portable tree climbing device

2008-04-18

2011-10-25

Shue, Alvin Chin (Department: 3634)

Fire escape, ladder, or scaffold

Wall- or floor-attached

Independent rung or step

Reexamination Certificate

active

08042650

ABSTRACT:
A removable step used to climb a vertical surface. The step has first and second structural members and at least two brace members spacing the structural members. A coupler is rigid with one of the structural members and is operable to secure the structural member to the vertical surface.

REFERENCES:
patent: 471626 (1892-03-01), Streeter
patent: 2461825 (1949-02-01), Kowalski
patent: 5080193 (1992-01-01), Woof
patent: 5704448 (1998-01-01), Jenkins, Jr.
patent: 2005/0109559 (2005-05-01), Eike

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