Method for reducing the size of a grouping pattern for a set of multiple bolts shot by a crossbow
US8845464B1 · kind B1 · utility
31Cited by
4References
1Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 17, 2012 |
| Grant date | Sep 30, 2014 |
| Priority date | — |
| Expiry date | Aug 17, 2032 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF42B6/06
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Each bolt of a set has three vanes and a nock with three diametrical transverse grooves; each groove is perpendicular to a corresponding vane. Each bolt is shot at least three times with a crossbow, at least once with each one of the vanes extending downward into the rail slot of a crossbow. After noting the positions on a target for each shot of each bolt, one vane of each bolt is marked so that shooting the set of bolts with the corresponding marked vanes extending downward into the rail slot results in the smallest grouping pattern for the set of bolts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.