Shot wad with highly collapsible hinge portion
US5347932A · kind A · utility
9Cited by
7References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 21, 1993 |
| Grant date | Sep 20, 1994 |
| Priority date | — |
| Expiry date | May 21, 2013 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF42B7/08
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The invention uses a pair of curved opposed diagonal bars between the wad and cup. The bars (deformable resistance members) buckle in the radial direction and end up basically flat between the wad and cup to give surprisingly and unexpectedly high amounts of collapse (80% or more). This allows the space between wad and cup to be decreased significantly without sacrificing cushioning.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.