Shiftable tail-block logging skyline

Details Shiftable tail-block logging skyline Shiftable tail-block logging skyline

1999-05-19

2000-11-14

Brahan, Thomas J.

Traversing hoists

Overhead

Cable

212 87, 212 94, 212 97, B66C 2100

Patent

active

061456799

ABSTRACT:
A skyline operates on a mountain side from an upper tail-block that is positionable along a transverse cable extending between two elevated anchor points. A balloon is attached to the upper tail-block to assist in supporting the weight of the skyline cable, and also the weight of the drop line carriage mounted on the skyline.

REFERENCES:
patent: 725770 (1903-04-01), Probasco
patent: 3221897 (1965-12-01), Matheson
patent: 3346127 (1967-10-01), Pelton et al.
patent: 4756431 (1988-07-01), Hirano
patent: 5080302 (1992-01-01), Hoke

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