Traversing hoists – Having means to prevent or dampen load oscillations – Antisway
Patent
1994-06-27
1996-01-02
Huppert, Michael S.
Traversing hoists
Having means to prevent or dampen load oscillations
Antisway
212293, 212299, 212306, 414546, B66C 2300
Patent
active
054800412
ABSTRACT:
Disclosed is a new trailer-mounted crane for providing a vehicle-trailable general purpose lightweight crane. The trailer-mounted crane comprises a flatbed trailer defining a transportable crane base. A crane boom, comprising an elongated steel channel having a sheave mounted at the distal end thereof, is pivotally connected central a top rear edge of the trailer deck such that a distal end of the boom is elevationally adjustable for hoisting, moving, and lowering loads. A telescoping boom travel limit arm prevents the boom from being raised to a dangerous vertical orientation whereupon the boom and any load suspended therefrom may fall towards operating personnel. Boom sway damping arms control swinging load induced boom yaw whereby improving overall stability of the crane. A manual load hoist winch, having a load hoist cable operably connected thereto, is secured to the trailer. A motorized boom pitch winch, having a boom pitch cable operably connected thereto, is also secured to the trailer.
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patent: 3212655 (1965-10-01), Prass
patent: 3912088 (1975-10-01), Bronfman
patent: 4889465 (1989-12-01), Brooks
Brahan Thomas J.
Huppert Michael S.
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