Self-erecting crane for tree-mounted blinds

Details Self-erecting crane for tree-mounted blinds Self-erecting crane for tree-mounted blinds

2007-01-30

2007-01-30

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

Fire escape, ladder, or scaffold

Platform with elevating or lowering means

C182S187000, C182S020000, C135S901000

Reexamination Certificate

active

10703726

ABSTRACT:
A crane mechanism for raising a hunting blind or similar large object up along the side of a tree trunk, the crane using the vertical tree trunk as its support tower. The crane is generally L-shaped in use, having a vertical trunk-securing arm adapted to be temporarily secured directly against the side of the tree trunk above the installation height of the object to be raised, a perpendicular boom extending away from the tree trunk, and a hoist mechanism on the boom spaced from the tree trunk. A separable hoist drive can be used, for example mounted to the base of the tree trunk in the same manner as the vertical trunk-securing arm.

REFERENCES:
patent: 3568796 (1971-03-01), Stanhope
patent: 3568797 (1971-03-01), Hardy
patent: 4082161 (1978-04-01), Johnson
patent: 4134474 (1979-01-01), Stavenau et al.
patent: 4493395 (1985-01-01), Rittenhouse
patent: 4582165 (1986-04-01), Latini
patent: 4593789 (1986-06-01), Treants
patent: 5117942 (1992-06-01), Tzavaras
patent: 5803694 (1998-09-01), Steele
patent: 5862827 (1999-01-01), Howze
patent: 5908084 (1999-06-01), Laurin et al.

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