Variable beam trimaran

Details Variable beam trimaran Variable beam trimaran

1986-08-28

1988-03-15

Peters, Jr., Joseph F.

Ships

Displacement-type hull

Multiple hulls

114123, 114354, B63B 700

Patent

active

047305703

ABSTRACT:
The main hull of a trimaran supports starboard and port side auxiliary hulls or floats by front and rear pairs of horizontally disposed crossarms which are removably fastened at their outer ends to an auxiliary hull, and slidably fastened at their inner ends to the main hull. Port holes coaxially aligned with each starboard/port side pair of crossarms are provided through the starboard and port side sides of the main hull. U-bolt clamps joining the inner ends of the crossarms to the main hull may be loosened, permitting starboard and port side auxiliary hulls to be retracted inwardly by sliding the crossarms through the port holes into the interior of the main hull until the inner facing surfaces of starboard crossarms abut inner facing surfaces of port side crossarms. By removing entirely every other odd crossarm on one side of the main hull and every other even crossarm on the opposite side of the main hull, clearance is provided permitting both auxiliary hulls to be fully retracted into positions contacting the main hull by sliding alternate crossarms through an adjacent port hole, through the interior of the main hull, and out through the opposite port hole. With both auxiliary hulls thus fully retracted, the beam of the trimaran is substantially reduced, facilitating docking and trailering the vessel.

REFERENCES:
patent: 1710625 (1929-04-01), Kapigian
patent: 3045263 (1962-07-01), Blachly
Popular Science, vol. 167, No. 2, Aug. 1955 pp. 194-195.

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