公开(公告)号：US4429654A

公开(公告)日：1984-02-07

申请号：US282082

申请日：1981-07-10

申请人： Richard H. Smith, Sr.

发明人： Richard H. Smith, Sr.

IPC分类号： B21C37/12 ,  B21C37/15 ,  B23K11/08 ,  B63B9/06 ,  B63B35/28 ,  F16L9/16 ,  F16L9/18 ,  B63B3/00

CPC分类号： B21C37/123 ,  B21C37/154 ,  B23K11/084 ,  B63B35/285 ,  B63B9/06 ,  F16L9/16 ,  F16L9/18 ,  Y10T29/49828 ,  Y10T29/49879

摘要： A structural vessel includes helically curved inner and outer spaced strips of material each having a plurality of helical turns, with contiguous edges of each two successive turns of the inner and outer strips being seamed together, and a helically curved structural beam disposed between the strips and secured thereto along their turns. A floatable work housing is provided for vessel fabrication, the housing having a sealed opening through which the completed portion of the vessel progressively extends and is floated on a body of water to avoid a need for external supports and bearings.