EP 0406451 A4 19910612 - MARINE PROPULSION APPARATUS
Title (en)
MARINE PROPULSION APPARATUS
Publication
Application
Priority
- JP 1253489 A 19890120
- JP 19787589 A 19890729
Abstract (en)
[origin: WO9008061A1] This invention relates to a marine propulsion apparatus. To improve propeller efficiency by utilizing the flow in the backward direction of a propeller shaft and the flow turning in the rotating direction of the propeller, the present invention provides a marine propulsion apparatus which has propeller vanes (2) and turbine vanes (3) fitted to the propeller shaft (1). The propeller vanes (2) are fitted on the front side and the turbine vanes (3), on the rear side, and an axial length (l) obtained by dividing the distance between the center lines of both vanes (2) and (3) by the diameter of the propeller is at least 6 % and the number of turbine vanes (3) is integral multiples of the number of propeller vanes (2). Furthermore, the diameter of the turbine vanes (3) is 33 to 60 % of the diameter of the propeller vanes (2) and the pitch angle ($g(U)p?) of the propeller vanes (2) and the pitch angle ($g(U)T?) of the turbine vanes (3) satisfy the relation $g(U)T? $g(U)p? + 20 at the position satisfying the relation 0.3 r/R 0.6.
IPC 1-7
IPC 8 full level
B63H 1/20 (2006.01); B63H 1/26 (2006.01); B63H 1/28 (2006.01); B63H 5/10 (2006.01)
CPC (source: EP KR)
B63H 1/28 (2013.01 - EP KR); B63H 5/10 (2013.01 - EP); B63H 2005/103 (2013.01 - EP)
Citation (search report)
- [Y] US 1386835 A 19210809 - WHITEHEAD BIRKETT RALPH
- [Y] DE 606119 C 19341124 - NICHOLAS WLADIMIR AKIMOFF
- [Y] GB 191007889 A 19100929 - BROUSSOUSE FERNAND [BE]
- [Y] FR 820738 A 19371117
- [A] US 2199823 A 19400507 - PETER KESSERY
- [A] US 2474562 A 19490628 - WILLIAM WATERVAL
- See references of WO 9008061A1
Designated contracting state (EPC)
DE FR GB NL SE
DOCDB simple family (publication)
WO 9008061 A1 19900726; DE 69002413 D1 19930902; DE 69002413 T2 19931125; EP 0406451 A1 19910109; EP 0406451 A4 19910612; EP 0406451 B1 19930728; JP H02279490 A 19901115; JP H085431 B2 19960124; KR 910700173 A 19910314; KR 950003362 B1 19950412
DOCDB simple family (application)
JP 9000065 W 19900119; DE 69002413 T 19900119; EP 90901906 A 19900119; JP 19787589 A 19890729; KR 900702091 A 19900920