US 2007/0175380 A1Published application

Water craft with new configuration of active hulls and stationary hulls for better hydrodynamic performance, greater stability and increased versatility

OwnerChing Yin Auinventor

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Abstract

Water craft achieving better hydrodynamic performance, greater stability and increased versatility. The improvement over the water craft in the U.S. Pat. No. 6,595,815 is achieved by the use of a new configuration of the active hulls and the stationary hull, the modification of the active hulls and the stationary hulls and the addition of a pair of the modified active hulls.

Claims2

Dependent claims

1) A water craft comprising:

a front pair of rotatively driven active hulls being of frusto-conical configuration,with a planar bottom wall and a conical top closure, a rear pair of identical rotatively driven active hulls located straight behind said front pair of rotatively driven active hulls but with allowance of an adequate space for the placement of a pair of stationary hulls between said front and rear pair of rotatively driven active hulls, a pair of stationary hulls, each stationary hull being constructed for buoyancy and being shaped to incur no frontal drag when the water craft is in motion by having its lateral surfaces shaped to follow the contour of, but without making contact with, the conical surface of its adjacent rotatively driven active hulls and by having its four longitudinal surfaces consisting of one tilted flat surface coplanar with the planar bottom of its adjacent rotatively driven active hulls, one vertical flat surface spanning, but without making contact with, the outermost part of the conical surface of its adjacent rotatively driven active hulls, one horizontal flat surface that is the bottom of the stationary hull and one horizontal flat surface that is the top of the stationary hull and finally a set of lateral structural members connecting said pair of stationary hulls together with longitudinal and diagonal strengthening members to form a supporting structure for the mounting of said two pairs of rotatively driven active hulls, each of said rotatively driven active hulls being constructed to provide additional buoyant force to said pair of stationary hulls, and each of said rotatively driven active hulls having an axis of rotation positioned approximately forty-five degrees relative to the horizontal and projected laterally from the center of the water craft in such an orientation that the large planar bottom wall of each of said rotatively driven active hulls is near the center of the water craft.

Dependencies are inferred from the claim text.

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Abstract

1) A water craft comprising:

a front pair of rotatively driven active hulls being of frusto-conical configuration,with a planar bottom wall and a conical top closure, a rear pair of identical rotatively driven active hulls located straight behind said front pair of rotatively driven active hulls but with allowance of an adequate space for the placement of a pair of stationary hulls between said front and rear pair of rotatively driven active hulls, a pair of stationary hulls, each stationary hull being constructed for buoyancy and being shaped to incur no frontal drag when the water craft is in motion by having its lateral surfaces shaped to follow the contour of, but without making contact with, the conical surface of its adjacent rotatively driven active hulls and by having its four longitudinal surfaces consisting of one tilted flat surface coplanar with the planar bottom of its adjacent rotatively driven active hulls, one vertical flat surface spanning, but without making contact with, the outermost part of the conical surface of its adjacent rotatively driven active hulls, one horizontal flat surface that is the bottom of the stationary hull and one horizontal flat surface that is the top of the stationary hull and finally a set of lateral structural members connecting said pair of stationary hulls together with longitudinal and diagonal strengthening members to form a supporting structure for the mounting of said two pairs of rotatively driven active hulls, each of said rotatively driven active hulls being constructed to provide additional buoyant force to said pair of stationary hulls, and each of said rotatively driven active hulls having an axis of rotation positioned approximately forty-five degrees relative to the horizontal and projected laterally from the center of the water craft in such an orientation that the large planar bottom wall of each of said rotatively driven active hulls is near the center of the water craft.