Anti-cavitation rudder blade
US4510879A · kind A · utility
Inventors
Key dates
| Filing date | Sep 28, 1982 |
| Grant date | Apr 16, 1985 |
| Priority date | — |
| Expiry date | Sep 28, 2002 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB63H25/38
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A rudder blade means of the type designed to reduce the drag produced by rudder blades of conventional design. The novel design, having utility in any vessel that travels through a fluid medium and incorporates a substantially vertically aligned chamber formed internally of the rudder body. The chamber has a narrow, slot-like portion that is in open communication with the trailing edge of the rudder body, and an enlarged, bore-like portion remote from said trailing edge but in open communication with the innermost portion of said slot-like portion. In applications where the rudder body is mounted to a sea-going vessel, and wherein such rudder body has a submerged portion and an un-submerged portion, water enters the chamber, in a counterswirling pattern, through the slot-like portion, and is driven upwardly, by water pressure, through the bore-like portion and is expelled above the water line through the uppermost region of said slot-like portion of such chamber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.