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An assisted-opening knife being opened. An assisted-opening knife is a type of folding knife which uses an internal mechanism to finish the opening of the blade once the user has partially opened it using a flipper or thumbstud attached to the blade. [1] When the knife is in the closed position, the blade is held in place by means of torsion ...
In 1981, Collins' designed a knife for Gerber Legendary Blades named the LST (light, strong, tough). The LST was the first knife to feature injection molded Zytel handles and featured a total of six parts. His next design was an assisted opening knife called the Strut and Cut; the design for which came from motorcycling.
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The handle splits apart revealing a separate knife, fork, spoon and bottle opener. Case produced two variations of the Hobo ('51 and '52) from the early 1900s-1940. These were made with two to four utensil implements using a can opener, soup spoon, three-pronged fork, and knife blade. Case re-introduced the Hobo (54) in 1983. The CopperLock
Ken Onion (born January 16, 1963) is an American custom knifemaker based in Kaneohe, Hawaii, United States who invented the "SpeedSafe" assisted opening mechanism for Kershaw Knives. [1] Ken Onion was the Premier Knife Designer for Kershaw Knives. [2] [3] [4]
A Kershaw Leek Assisted-opening knife in action. On 28 December 1998, the USPTO granted and published U.S. patent 6,006,385 for inventors Peter G. Kershaw, Douglas B. Flagg, Craig Green and Katsumi Hasegawa. The patent was filed on 24 January 1997 by Kai USA Ltd, who was also the assignee for the duration of its 20-year life span. [6]