Title:
VESSEL PROPELLER
Document Type and Number:
WIPO Patent Application WO/2020/145115
Kind Code:
A1
Abstract:
According to the present invention, a palm 3 is provided with a tapered hole 34 of which the inside diameter decreases toward the radially inward side, and a through-hole 35 that extends radially inward from the bottom surface of the tapered hole 34. A blade 4 is provided with a tapered shaft 44 of which the outside diameter decreases toward the radially inward side, and either an attachment shaft 45 that extends radially inward from the bottom surface of the tapered shaft 44 or an attachment hole 46 that extends radially outward from the bottom surface of the tapered shaft 44. The present invention comprises either a nut-shaped fastening member 5 that is threadably mounted on the attachment shaft 45 inserted through the through-hole 35 from the radially outward side or a bolt-shaped fastening member 5 that is inserted through the through-hole 35 from the radially inward side and threadably mounted in the attachment hole 46. Fastening the fastening member 5 brings the inner peripheral surface of the tapered hole 34 and the outer peripheral surface of the tapered shaft 44 into pressing contact with each other to secure the blade 4.
Inventors:
NISHIKIDO SHINGO (JP)
YAMATOGI TOSHIO (JP)
INOUE TOSHIYUKI (JP)
HAYASHI KAZUYA (JP)
YAMATOGI TOSHIO (JP)
INOUE TOSHIYUKI (JP)
HAYASHI KAZUYA (JP)
Application Number:
PCT/JP2019/050434
Publication Date:
July 16, 2020
Filing Date:
December 23, 2019
Export Citation:
Assignee:
NAKASHIMA PROPELLER CO LTD (JP)
International Classes:
B63H1/20; B63H1/26
Foreign References:
| US4150921A | 1979-04-24 | |||
| JPS5220593A | 1977-02-16 | |||
| JP2017061237A | 2017-03-30 | |||
| JPH0485193A | 1992-03-18 | |||
| JP2007528313A | 2007-10-11 |
Attorney, Agent or Firm:
YANO INTERNATIONAL PATENT ATTORNEYS OFFICE, P.C. (JP)
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