Spring assisted folding knife
US7543386B2 · kind B2 · utility
Inventor
Key dates
| Filing date | May 8, 2006 |
| Grant date | Jun 9, 2009 |
| Priority date | — |
| Expiry date | May 8, 2026 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB26B1/046
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A folding knife includes a handle defining a knife receiving chamber and including first and second inner plates disposed in spaced relation between a pair of outer plates. The folding knife also supports a blade having a tip end and a tang end that is pivotally attached to the handle and is pivotable between a retracted position where the blade is disposed in the knife receiving chamber and an extended position where the blade resides outside of the handle. The first inner plate has a slot formed therein so as to define a lock member that has a locking edge that is biased inwardly towards the blade and having an extension projecting outwardly from the locking edge. When the blade is in the extended position, the locking edge moves into a locking arrangement abutting against the tang end of the blade, with the extension being constructed to prevent the locking edge from inadvertently slipping from its abutting relationship with the tang end of the blade to ensure that the blade is securely held open in the extended position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.