Base drag reducing device
US6297486A · kind A · utility
32Cited by
19References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 8, 1997 |
| Grant date | Oct 2, 2001 |
| Priority date | — |
| Expiry date | Oct 8, 2017 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF42B10/44
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A device for reducing base drag on cylindrical rear truncated objects moving in a fluid, caused by the shedding of vortices at the base of the object. The device consists of ring shaped winglets attached to the rear of the object which may be sub-divided into a plurality of hinged partial winglets. The parameters of distance of winglet from cylinder shaped object, winglet circumference, angle, profile and chord length may be varied automatically for optimum drag-reducing capability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.