Marine propelling apparatus
US4793773A · kind A · utility
34Cited by
4References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 19, 1987 |
| Grant date | Dec 27, 1988 |
| Priority date | — |
| Expiry date | Oct 19, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB63H5/10
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
This disclosure relates to a marine propulsion system including a double propeller. To obtain a forward thrust, the two propellers are driven in opposite directions while producing forward propulsion forces. To obtain a rearward thrust, only one propeller is driven in the direction to produce a rearward force. The two propellers are attached to coaxial inner and outer horizontal shafts. A single vertical shaft is coupled by bevel gears to the shafts, and movable clutches couple the driving force to the horizontal shafts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.