Combined cutter and bypass for propeller
US4676758A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 12, 1985 |
| Grant date | Jun 30, 1987 |
| Priority date | — |
| Expiry date | Sep 12, 2005 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB63H1/20
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A motor-driven marine propeller is disclosed for propelling a marine vessel. The propeller includes a hub member driven by the motor and a can member disposed coaxially relative to the hub member the can member having a fore and an aft end. The hub member and the can member define therebetween an annular port for the passage therethrough of a portion of the exhaust generated by the motor. Supports extend between the hub member and the can member for supporting the can member coaxially relative to the hub member and a plurality of blades are secured to and extend from the can member with each of the blades being equidistantly spaced relative to each other. Each of the blades defines a leading and a trailing surface such that the propeller rotates in a direction from the trailing towards the leading surface in normal forward motion. A plurality of notches are defined by the fore end of the can member and each of the notches is disposed adjacent to a trailing surface of an adjacent blade such that the notches cut through filamentary material entangled around the propeller and reduce the generation of eddies during rotation of the propeller.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.