Ships – Mooring device – Boom type
Patent
1994-12-20
1995-12-19
Swinehart, Edwin L.
Ships
Mooring device
Boom type
114293, B63B 2100
Patent
active
054760593
ABSTRACT:
A torque enhancer (60, FIG. 1) is provided for an offshore system wherein a turret (18) is rotatably mounted about a vertical axis (22) on a vessel hull and the turret is anchored by catenary chain devices (24), to help minimize rotation of the turret when the vessel weathervanes. The torque enhancer may include a pair of members (80, 82, FIG. 3) with horizontally-spaced inner ends (84, 86) pivotally mounted on the turret and with outer ends (90, 92) coupled to a chain device (24) to transmit horizontal components (E) of tension force that tend to turn the turret to maintain it at its initial rotational orientation with respect to the seafloor. In one system, the arms are rigid beams arranged to form an A-frame, with the outer ends of the arms supporting a guide (100) and with the chain device slidably extending through the guide and attached to the vessel half way between the inner ends of the beams. In another system, a pair of chains (122, 124, FIG. 4) or other flexible tension members couple a chain device (136) to horizontally spaced locations on the turret.
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Imodco Inc.
Swinehart Edwin L.
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