Automatic opening mechanical archery broadhead
US8894519B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Mar 15, 2013 |
| Grant date | Nov 25, 2014 |
| Priority date | — |
| Expiry date | May 8, 2033 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF42B6/08
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Archery broadheads include one or more cutting blades which are folded in when shot from a bow. The blades deploy automatically using stored potential energy upon impact with minimal interaction with the target. The blades are attached to the main body of the broadhead and pivot near the leading or forward edge. The deployment is caused by a plunger tip cam releasing the stored potential energy of an internal spring mechanism and uses only minimal kinetic energy of the arrow to actuate. According to one exemplary embodiment, once actuated, the internal spring slides along a cam shaped part of the blades forcing them open. According to another exemplary embodiment, once actuated, the internal spring operates a slide connecting a toggle-link to the blades forcing them open. In both embodiments, the spring-slide mechanism holds the blades closed during flight, deploys the blades on contact and locks the blades open.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.