Traversing hoists – Boom or mast
Patent
1995-02-28
1997-10-07
Merritt, Karen B.
Traversing hoists
Boom or mast
212294, 212348, B66C 2342, B66C 2366
Patent
active
056738056
ABSTRACT:
A jib pin alignment jack assembly for aligning the apertures on the proximate end of a jib with apertures on the nose assembly of a boom section to facilitate the manual insertion of pins therein for holding the jib in the operative position relative to the boom section. A manually actuated hydraulic jack is mounted on the underside of the jib at the proximate end thereof, and the jack saddle is extendable to push against the nose assembly on the boom section, to thereby align the apertures for insertion of pins therein. One person is able to not only actuate the hydraulic jack to align the apertures but also insert the pin in the aligned apertures.
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Merritt Karen B.
National Crane Corporation
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