B - Operations – Transporting – 66 – D
Patent
B - Operations, Transporting
66
D
254/72
B66D 1/26 (2006.01)
Patent
CA 1045110
TITLE SMALL, VARIABLE-SPEED YARDER ABSTRACT OF THE DISCLOSURE A small, variable-speed yarder is provided with main, haulback and slack-pulling drums, each containing a planetary drive transmission with provisions for dual power inputs. A variable interlock mechanism controls the relative speed of the haulback drum to the two inhaul drums (main and slack-pulling) and a differential drive mechanism controls the relative speed and/or direction of the inhaul drums.
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