Device for attaching to a tree and stabilizing a bowman...

Details Device for attaching to a tree and stabilizing a bowman... Device for attaching to a tree and stabilizing a bowman...

2008-01-29

2008-01-29

Chin-Shue, Alvin C (Department: 3634)

Fire escape, ladder, or scaffold

Scaffold external of shaft

C182S188000

Reexamination Certificate

active

10372688

ABSTRACT:
A strap surrounding a trunk. A support is held a strap against the trunk. A mechanical linkage is attached to the support. A brake is furnished to the mechanical linkage. A frame is attached to the linkage for maintaining a person in position. A belt attached to the frame to be wrapped around a person for preventing a falling of the person. The mechanical linkage can comprise a distance adjustment mechanics allowing a change in distance between the support and the frame. An adjustable mechanical impedance can oppose forces exerted on the mechanical linkage for effecting a change in distance between the support and the frame. The adjustable mechanical impedance can be furnished by an adjustable friction brake.

REFERENCES:
patent: 784390 (1905-03-01), Dunham
patent: 1187100 (1916-06-01), Rooth
patent: 2879830 (1959-03-01), Johnson
patent: 3088438 (1963-05-01), Oliphant
patent: 3358789 (1967-12-01), Laun
patent: 3523591 (1970-08-01), Fountain
patent: 4352409 (1982-10-01), Fountain
patent: 5507362 (1996-04-01), Krueger

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