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EspañolASSISTED-OPENING KNIFE
An 'assisted-opening knife' is a type of knife which uses an internal mechanism to open the blade from a closed position when slight pressure is applied to the thumbstud or the flipper.[1]
When the knife is in the closed position, the blade is held in place by means of 1 or 2 torsion bars. As the user applies manual pressure to the thumbstud to open the knife, a mechanism such as a torsion bar moves along a track in the liner and rotates the blade into the open position.[2]
Although commonly confused with switchblade knives, there is a difference. While a switchblade can be opened usually with the push of a button, the user of an assisted-opening knife must apply some pressure to the blade at the thumb stud or flipper.
Because the blade does not open by the push of a button or force of gravity, the Assisted Opening mechanism is normally not considered a switchblade.[3] Once the knife has been opened about one-quarter of the way (45°), the mechanism opens the knife the rest of the way. [4]Some people also refer to these and switchblades as "angel blades" depending on what their base looks like.
1. Butch Winter 'King of the Assisted Openers', Blade Magazine, August 2004
2. ''Ibid'', Blade Magazine, August 2004
3. Jim Gardner,'Sweet Onions', Guns Magazine, June 2004
4. 'Kershaw's Latest Tactical Folders', Knives Illustrated, February 2007, by Pat Cascio
US Patent and Trademark Office
When the knife is in the closed position, the blade is held in place by means of 1 or 2 torsion bars. As the user applies manual pressure to the thumbstud to open the knife, a mechanism such as a torsion bar moves along a track in the liner and rotates the blade into the open position.[2]
Although commonly confused with switchblade knives, there is a difference. While a switchblade can be opened usually with the push of a button, the user of an assisted-opening knife must apply some pressure to the blade at the thumb stud or flipper.
Because the blade does not open by the push of a button or force of gravity, the Assisted Opening mechanism is normally not considered a switchblade.[3] Once the knife has been opened about one-quarter of the way (45°), the mechanism opens the knife the rest of the way. [4]Some people also refer to these and switchblades as "angel blades" depending on what their base looks like.
A Kershaw Assisted-opening knife in action.
| Contents |
| References |
| Sources |
References
1. Butch Winter 'King of the Assisted Openers', Blade Magazine, August 2004
2. ''Ibid'', Blade Magazine, August 2004
3. Jim Gardner,'Sweet Onions', Guns Magazine, June 2004
4. 'Kershaw's Latest Tactical Folders', Knives Illustrated, February 2007, by Pat Cascio
Sources
US Patent and Trademark Office
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