Over center expanding arrowhead
US10415940B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Jul 10, 2018 |
| Grant date | Sep 17, 2019 |
| Priority date | — |
| Expiry date | Jul 10, 2038 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF42B6/08
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Improvements in an expanding arrowhead where the initial launching thrust of launching an arrow keeps the blades retracted within the head of the arrow. The blades remain retracted because the center of mass of the blades is on the opposite side of the rotational pivoting axis of the blades. When the blades contact a target a wing tip on the blades pull the blades open. There are two or three blades that can be retained within the head of the arrow. The blades are loosely retained in a retracted orientation for transportation. The retention is sufficient to overcome the forces or gravity yet release with slight force on then ends of the blades. When the arrow is pulled through the wound track the blades fold back into the head or body.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.