Method and device for a fin-stabilized base-bleed shell
US6336609B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 2, 1999 |
| Grant date | Jan 8, 2002 |
| Priority date | — |
| Expiry date | Nov 2, 2019 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF42B10/661
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The present invention relates to a method and a device relating to shells with deployable fins and which are fired from large caliber guns into ballistic trajectories, for preventing the propellant gas pressure in the barrel during firing from directly or indirectly deforming the said fins (9-13). The type of fins that the present invention primarily relates to are those that are deployed on command in order to fin-stabilize the shell. Usually such fins are protected prior to deployment by an ejectable fin protector (19). To prevent this fin protector from being deformed and consequently impeding fin deployment or degrading fin functionality, the present invention proposes that all unoccupied space inside the said fin protector be filled with an inert, noncombustible, non-glutinous substance (32) of low compressibility and very low inherent strength. This substance, which completely fills the space inside the fin protector around the fins (9-13), will detach from the fins after fin deployment as a result of mainly centrifugal forces, but until that point in time will effectively prevent all undesirable deformation of the fin protector and thereby indirectly of the fins. Until eject…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.