(19)
(11) EP 0 249 321 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
03.05.1989 Bulletin 1989/18

(43) Date of publication A2:
16.12.1987 Bulletin 1987/51

(21) Application number: 87303662.8

(22) Date of filing: 24.04.1987
(51) International Patent Classification (IPC)4: B63B 1/18, B63B 1/12
(84) Designated Contracting States:
AT BE CH DE ES FR GB GR IT LI LU NL SE

(30) Priority: 24.04.1986 NZ 215950

(71) Applicant: Kemp, Rewi
Mt. Roskill Auckland 4 (NZ)

(72) Inventor:
  • Kemp, Rewi
    Mt. Roskill Auckland 4 (NZ)

(74) Representative: Butler, Michael John et al
Frank B. Dehn & Co., European Patent Attorneys, 179 Queen Victoria Street
London EC4V 4EL
London EC4V 4EL (GB)


(56) References cited: : 
   
       


    (54) Boat hull


    (57) A boat hull (l0) of increased lift and efficiency is described. Lift is imparted by having a pair of contoured channels (l8,l9) along the chines (20,2l) of the hull. The hull may be a single or multiple hull (l2,l4). In the case of multiple hulls (l2,l4) the contoured channels (l8,l9,52) may be provided along both the inner and outer edges. In a most preferred embodiment at least one hydrofoil (50) is mounted underneath the central bottom portion (l7) of the twin-hulled craft (both with and without contoured channels) between the two hulls (l2,l4). This mounting position provides the hull (l0) with the advantages of hydrofoil assistance without the obstruction of a convention hydrofoil mounting.







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