B - Operations – Transporting – 66 – D
Patent
B - Operations, Transporting
66
D
254/32
B66D 1/36 (2006.01) H02G 1/04 (2006.01)
Patent
CA 1234092
-28- APPARATUS AND METHODS FOR LINE STRINGING WITH LOAD PICKUP COUPLING DEVICE Abstract of the Disclosure The problem of stringing power transmission lines via a line-holding structure that has an upper cross support and no side access, such as the center strand under a cross support on a tower, is solved by the methods and stringing apparatus disclosed. The stringing apparatus (40) is carried in a depending man- ner from the aircraft (10) by a hoist line (54) and enables the insertion of a sock line (30) through the line-holding structure (29), followed by the pulling of the line therethrough. The stringing apparatus is in the form of a needle-type structure, inclusive of a support member (42) carrying front and rear coupling devices (46 and 48) and front and rear tower catches (50 and 52). After the sock line has been strung, one end is secured to a power line which is then threaded through the line-holding structure to complete the stringing of a center strand of power line. A coupling device (515) disclosed includes a pivot member (517) pivotally mounted on the load having a disposition and configuration that is readily engaged by a hoist line (542) with an end or weight member (543) from above and guided into a retainer portion (522) so that as the hoist line is raised a connection is formed between the hoist line and the load. Upon deployment and relief of the weight of the load from the hoist line, the pivot member automatically returns to the starting position and the hoist line and end member are slid therefrom.
366657
Chapman Claude L.
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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