Multi-hull boat

Abstract

An ocean-cruising V-hull catamaran is disclosed in which the hulls mirror image one another and each have a forward portion longitudinally symmetric with convex curves while the rearward portion of each has a concave, inside curve and said hulls are uniquely wide and high and contain a full-height walkway while said hulls are joined by composite beams.

1 . A catamaran having at least a first and second hull, with at least one hull being formed to have: 
 a walkway level.    
   
   
       2 . The catamaran of  claim 1  wherein the walkway level further comprising: 
 a walkway U-channel being formed by    a walkway base,    a portside surface, and    a starboard surface all being supported adequately.    
   
   
       3 . The catamaran of  claim 2  wherein said adequate support is provided by: 
 at least one rib having:    a walkway aperture for receiving said walkway U-channel.    
   
   
       4 . A catamaran having at least a first and second hull, each hull being substantially identical in their respective external shapes, joined to be mirror images one of the other, each hull being formed to have: 
 a substantially triangular cross section, the cross sectional shape extending substantially along the entire length of the hull, the substantially triangular cross section being defined by    a plurality of v-shaped ribs having:    an outer side and    an inner side, the outer and inner sides meeting at    a keel,    the outer side of the v-shaped ribs being covered to form a convex surface,    the inner side of a number of the v-shaped ribs at a forward portion of the hull being covered to form a convex surface, and the inner side of the remaining number of v-shaped ribs at the rear portion of the hull being covered to form a concave surface.    
   
   
       5 . The catamaran of  claim 4 , in which the concave portion of the rearward portion of the hull is formed by: 
 a final, asymmetric rib wherein the asymmetric rib is further comprised of    an inner side whose angle with the keel is less, as measured by degrees from a vertical centerline plane of the hull, than the outer side.    
   
   
       6 . A catamaran having at least a first and second hull, each hull being substantially identical in their respective external shapes, joined to be mirror images one of the other, each hull being formed to have 
 a substantially triangular cross section, the cross sectional shape extending substantially along the entire length of the hull, the substantially triangular cross section being defined by    a hull framework whereby forming a hull of expanded volume.    
   
   
       7 . The catamaran of  claim 6 , wherein said hull framework is formed by 
 at least one of the centrally located ribs having an included angle of approximately ±150 or more as measured from the vertical centerline of the rib.    
   
   
       8 . The catamaran of  claim 6 , wherein said hull framework is formed by: 
 at least one of the centrally located ribs having a height in excess of  7 ′.    
   
   
       9 . The catamaran of  claim 8 , wherein 
 at least one of the centrally located ribs has an included angle of approximately ±150 or more as measured from the vertical centerline of the rib.    
   
   
       10 . A catamaran having at least a first and second hull wherein the hulls are joined by: 
 at least two connecting beams, at least one of which beams may be designated as a ‘composite’ beam.    
   
   
       11 . The catamaran of  claim 10  wherein the ‘composite’ beam is a steel-wood composite held together as appropriate.  
   
   
       12 . The catamaran of  claim 11  wherein the steel-wood composite beam further comprises: 
 a steel tube joined as appropriate to laminated wood.    
   
   
       13 . The catamaran of  claim 12  wherein the appropriate method of joining further comprises: 
 any appropriate epoxy, bodied or otherwise.    
   
   
       14 . The catamaran of  claim 2  wherein said adequate support is provided by: at least one rib having: a walkway aperture for receiving said walkway U-channel in combination with the catamaran of  claim 4 , in which the concave portion of the rearward portion of the hull is formed by: a final, asymmetric rib wherein the asymmetric rib is further comprised of an inner side whose angle with the keel is less, as measured by degrees from a vertical centerline plane of the hull, than the outer side.  
   
   
       15 . The catamaran of  claim 2  wherein said adequate support is provided by: at least one rib having: a walkway aperture for receiving said walkway U-channel in combination with the catamaran of  claim 8 , wherein: at least one of the centrally located ribs has an included angle of approximately ±150 or more as measured from the vertical centerline of the rib.  
   
   
       16 . The catamaran of  claim 2  wherein said adequate support is provided by: at least one rib having: a walkway aperture for receiving said walkway U-channel in combination with the catamaran of  claim 12  wherein the appropriate method of joining further comprises: any appropriate epoxy, bodied or otherwise.  
   
   
       17 . The catamaran of  claim 4 , in which the concave portion of the rearward portion of the hull is formed by: a final, asymmetric rib wherein the asymmetric rib is further comprised of an inner side whose angle with the keel is less, as measured by degrees from a vertical centerline plane of the hull, than the outer side in combination with the catamaran of  claim 8 , wherein: at least one of the centrally located ribs has an included angle of approximately ±150 or more as measured from the vertical centerline of the rib.  
   
   
       18 . The catamaran of  claim 4 , in which the concave portion of the rearward portion of the hull is formed by: a final, asymmetric rib wherein the asymmetric rib is further comprised of: an inner side whose angle with the keel is less, as measured by degrees from a vertical centerline plane of the hull, than the outer side in combination with the catamaran of  claim 12  wherein the appropriate method of joining further comprises: any appropriate epoxy, bodied or otherwise.  
   
   
       19 . The catamaran of  claim 8 , wherein: at least one of the centrally located ribs has an included angle of approximately ±150 or more as measured from the vertical centerline of the rib in combination with the catamaran of  claim 12  wherein the appropriate method of joining further comprises: any appropriate epoxy, bodied or otherwise.  
   
   
       20 . The catamaran of  claim 2  wherein said adequate support is provided by: at least one rib having: a walkway aperture for receiving said walkway U-channel in combination with the catamaran of  claim 4 , in which the concave portion of the rearward portion of the hull is formed by: a final, asymmetric rib wherein the asymmetric rib is further comprised of: an inner side whose angle with the keel is less, as measured by degrees from a vertical centerline plane of the hull, than the outer side and further in combination with the catamaran of  claim 8 , wherein: at least one of the centrally located ribs has an included angle of approximately ±150 or more as measured from the vertical centerline of the rib.  
   
   
       21 . The catamaran of  claim 2  wherein said adequate support is provided by: at least one rib having: a walkway aperture for receiving said walkway U-channel in combination with the catamaran of  claim 4 , in which the concave portion of the rearward portion of the hull is formed by: a final, asymmetric rib wherein the asymmetric rib is further comprised of: an inner side whose angle with the keel is less, as measured by degrees from a vertical centerline plane of the hull, than the outer side and further in combination with the catamaran of  claim 12  wherein the appropriate method of joining further comprises: any appropriate epoxy, bodied or otherwise.  
   
   
       22 . The catamaran of  claim 4 , in which the concave portion of the rearward portion of the hull is formed by: a final, asymmetric rib wherein the asymmetric rib is further comprised of: an inner side whose angle with the keel is less, as measured by degrees from a vertical centerline plane of the hull, than the outer side in combination with the catamaran of  claim 8 , wherein: at least one of the centrally located ribs has an included angle of approximately ±150 or more as measured from the vertical centerline of the rib and further in combination with the catamaran of  claim 12  wherein the appropriate method of joining further comprises: any appropriate epoxy, bodied or otherwise.  
   
   
       23 . The catamaran of  claim 2  wherein said adequate support is provided by: at least one rib having: a walkway aperture for receiving said walkway U-channel in combination with the catamaran of  claim 4 , in which the concave portion of the rearward portion of the hull is formed by: a final, asymmetric rib wherein the asymmetric rib is further comprised of: an inner side whose angle with the keel is less, as measured by degrees from a vertical centerline plane of the hull, than the outer side and further in combination with the catamaran of  claim 8 , wherein: at least one of the centrally located ribs has an included angle of approximately ±150 or more as measured from the vertical centerline of the rib and finally in combination with the catamaran of  claim 12  wherein the appropriate method of joining further comprises: any appropriate epoxy, bodied or otherwise.