Ships – Towing or pushing – Coupling means
Patent
1995-01-17
1996-09-24
Avila, Stephen
Ships
Towing or pushing
Coupling means
B63B 2158
Patent
active
055580360
ABSTRACT:
An integrated tug/barge (ITB) for carrying cargo, including: a cargo carrying barge having no means of propulsion; and a tug boat mounted on top of the barge such that the tug boat and the barge will experience identical motion when the ITB is operated, the tug boat including apparatus for propulsion and maneuvering of the ITB. In a further aspect, a method of launching a tug boat from the ITB, the method including: pushing the tug boat aftward until the center of gravity thereof is aft of a knuckle point formed by horizontal and sloped portions of the floor of a recess in which the tug boat is mounted; and permitting the tug boat to slide down the sloped portion of the bottom of the recess into water in which the barge is floating. In an additional aspect, a method of forming the ITB, the method including: ballasting the barge so that the bottom of the recess is under the surface of the water; using the apparatus for propulsion to propel the tug boat into the recess; securing the tug boat to the barge; and reballasting the barge to a normal position in the water.
REFERENCES:
patent: 3557741 (1971-01-01), Teasdale
patent: 3633532 (1972-01-01), Bruce
patent: 3815539 (1974-06-01), Stevens
patent: 3842782 (1974-10-01), Cuttica
patent: 5165357 (1992-11-01), Kawasaki
Avila Stephen
Crozier John H.
Skarhar, Inc.
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