Ships – Displacement-type hull – Multiple hulls
Patent
1985-09-12
1988-01-12
Peters, Jr., Joseph F.
Ships
Displacement-type hull
Multiple hulls
114339, B63B 100
Patent
active
047183683
DESCRIPTION:
BRIEF SUMMARY
This invention relates to a partially submersible water craft.
In one form the invention resides in a partially submersible water craft comprising a main hull and a pair of secondary hulls mounted one to each side of the main hull, an arm pivotally mounted at one end to each side of the main hull and pivotally mounted at the other end to the secondary hull, drive means between the arm and the main hull and/or secondary hull to cause pivotal movement of both of the arms relative to the main hull and/or the secondary hull wherein said main hull is movable between a position substantially coplanar with the secondary hulls and a second position wherein said main hull is located below the secondary hulls but spaced in between the secondary hulls.
According to a preferred feature of the invention the arms form part of a parallelogram-like linkage between the main hull and secondary hulls.
According to a further feature the main hull has positive buoyancy.
According to a further preferred feature of the invention the main hull has an air intake and exhaust which remain in constant communication with the atmosphere.
According to a further preferred feature of the invention the air intake and exhaust is incorporated in a super-structure on the main hull, the upper portion of which is always above water level.
According to a further preferred feature of the invention the super-structure incorporates an entry hatch and bridge facilities.
According to a further preferred feature of the invention the secondary hulls accommodate drive motors for effecting propulsion of the water craft and for auxiliary services.
The invention will be more fully understood in the light of the following description of one specific embodiment. The description is made with reference to the accompanying drawings of which:
FIG. 1 is a front elevational view of the embodiment with the main hull in the first position;
FIG. 2 is a front elevational view of the embodiment with the main hull in the second position;
FIG. 3 is a part sectional view of the embodiment along line 3--3 of FIG. 1;
FIG. 4 is a sectional view of the embodiment along line 4--4 of FIG. 1;
FIG. 5 is a plan view of the embodiment.
As shown in the drawings the embodiment comprises a water craft consisting of a central main hull 11 and a secondary hull 12 located to each side of the main hull 11. The main hull is formed with an upstanding super-structure 18 and each secondary hull 12 is connected to the main hull by means of an outrigger arm 14 pivotally mounted to both the secondary hull 12 and to the main hull 11. Each outrigger arm is associated with a secondary arm 13 mounted in parallel relationship with the outrigger arm 13 and pivotally connected to the super-structure 18 of the main hull 11 and an upstanding super-structure 19 of the secondary hulls 12 whereby the outrigger arm 14 and secondary arm 13 provide a parallelogram type linkage between the main hull and the secondary hull 12. A hydraulic ram 16 is mounted between the main hull 11 and each outrigger arm 14 whereby upon retraction or extension of the arm 16 the outrigger 13 is pivoted on the main hull to vary the disposition of the main hull to the secondary hulls 12. On retraction of the ram 16 the main hull is brought to a first position at which it is located substantially coplanar with and between the secondary hulls 12. On extension of the hydraulic ram 16 the main hull is moved to a position below the level of the secondary hulls 12 but between the secondary hulls. Due to the nature of the parallelogram-like interconnection between the main hull 11 and the secondary hull 13 the main hull maintains a substantially constant attitude to the vertical.
The outrigger arms each support propulsion pods 17 which incorporate drive propellers or the like drive means. The propulsion pods 17 are supported from the outrigger arms 14 by downwardly depending struts 15 such that when the main hull 11 is in its first position the propulsion pods 17 remain submerged. It is preferred that the propulsion pods have hydraulic mot
REFERENCES:
patent: 1303508 (1919-05-01), Simpson
patent: 4441445 (1984-04-01), De Weck
patent: 4452166 (1984-06-01), Daniel
patent: 4457248 (1984-07-01), Thurston
patent: 4494472 (1985-01-01), Rougerie
Peters Jr. Joseph F.
Sotelo Jesus D.
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