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US 3,937,171 AGranted
Multihull tugboat
OwnerJohn K. Seaborninventor
Life of this patent
Estimating the term…
Abstract
A tugboat of the kind used for moving and steering barges has laterally spaced individual hulls which are connected together by cross members in a parallel linkage connection. This permits the hulls to move relative to one another longitudinally while the hulls are retained parallel and laterally spaced apart.
Claims13
A multihull tugboat of the kind used for moving and steering barges and other floating objects, said tugboat comprising:
- two laterally spaced individual hulls;
- connecting means connecting the hulls for relative longitudinal movement while retaining the hulls parallel;
- shifting means associated with said connecting means for shifting the hulls longitudinally to selectively move the prow of one hull ahead of the other hull;
- propulsion means on each said hull;
- an engine in each said hull for driving said propulsion means associated with that hull;
- and fender means at the forward end of each hull for engagement with the barge or other object to be moved.
3 more elements
Dependencies are inferred from the claim text.