Assisted-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. [Butch Winter 'King of the Assisted Openers', Blade Magazine, August 2004]

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. ["Ibid", Blade Magazine, August 2004]

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. [Jim Gardner,'Sweet Onions', Guns Magazine, June 2004 ] Once the knife has been opened about one-quarter of the way (45°), the mechanism opens the knife the rest of the way. ['Kershaw's Latest Tactical Folders', Knives Illustrated, February 2007, by Pat Cascio ]

The side-opening switchblade differs from the assisted-opening knife - an assisted-opening knife is a knife that is opened partway by the user before a spring takes over and propels the blade open. Easily used and quickly opened with either hand, they are similar to switchblades, but have one main difference. While a switchblade can be opened, usually with the push of a button, the user of a spring-assisted knife must open the blade partway themselves with a thumb stud and the mechanism does the rest. Because the user's hands are free from the blade during opening they are far safer than a traditional knife where the user's hand must come into contact with the blade, and easier to operate (especially left handed) than many of the popular easy-open knife designs. The simplicity and rapidity of assisted-opening knives have raised questions about their legality, but they remain legal at this time.

Other names for assisted-opening knife are: A/O Knife, Torsion Assist Knife, Assisted Knife, Spring Assist Knife, Spring Assisted Knife, Quick Release, Quick Draw, Alternative Automatic and the Semi-Auto.

References

ources

[http://www.uspto.gov/ US Patent and Trademark Office]

[http://www.assistedknife.com/index.cfm/fa/pages.main/pageID/5 AssistedKnife.com by RoadsideImports]


Wikimedia Foundation. 2010.

Look at other dictionaries:

  • Knife legislation — is legislation regarding knives. Having the potential to be used as offensive weapons, carrying knives in public is forbidden by law in many countries. Exceptions may be made for hunting knives, and for knives used for work related purposes (e.g …   Wikipedia

  • Knife — A knife is a handheld sharp edged instrument consisting of handle attached to a blade used for cutting. The knife is a tool that can be used as a weapon. Its origins date as far back as two and a half million years ago, as evidenced by the… …   Wikipedia

  • Gravity knife — A gravity knife is a knife which opens by the forces of inertia or gravity.cite book | last = Langston | first = Richard | title = Collector s Guide to Switchblade Knives: An Illustrated Historical and Price Reference | publisher = Paladin Press… …   Wikipedia

  • Pocket knife — A pocket knife is a folding knife with one or more blades that fit inside the handle that can still fit in a pocket. It is also known as a jackknife or jack knife.[1][2] Blades can range from 1 cm (1/2 inch) to as much as 30 cm… …   Wikipedia

  • Columbia River Knife & Tool — Type Privately Owned Industry Manufacturing Founded 1994 …   Wikipedia

  • Ken Onion — Infobox Person name = Kenneth L. Onion image size = caption = birth date = birth date and age|1963|1|16 birth place = USA occupation = Knifemaker spouse = Noel OnionKen Onion (born January 16 1963) is an American award winning custom knifemaker… …   Wikipedia

  • Outburst — may refer to: Outburst Assist, a patented mechanism designed by Columbia River Knife and Tool for various models of assisted opening knives. Outburst (comics), a fictional superhero Outburst (game), a word game Outburst (mining), the sudden and… …   Wikipedia

  • List of Fist of the North Star characters — Opening page of chapter 209 of the Hokuto no Ken manga, which depicts Kenshiro confronting Kaioh, as images of past rivals are shown at the background. From left to right: Raoh, Thouzer, Shin, Rei, Toki, and Shu. The following is a list of… …   Wikipedia

  • United States — a republic in the N Western Hemisphere comprising 48 conterminous states, the District of Columbia, and Alaska in North America, and Hawaii in the N Pacific. 267,954,767; conterminous United States, 3,022,387 sq. mi. (7,827,982 sq. km); with… …   Universalium

  • performing arts — arts or skills that require public performance, as acting, singing, or dancing. [1945 50] * * * ▪ 2009 Introduction Music Classical.       The last vestiges of the Cold War seemed to thaw for a moment on Feb. 26, 2008, when the unfamiliar strains …   Universalium


Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.