Leverage opening knives: LevRLok and others

R

RX-79G

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Jun 23, 2006
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After seeing pictures in catalogs for years, but no really understanding what I was looking at, I finally watched some videos on the Camillus LevRLok. Like the less practical Kershaw E.T., it can be opened by moving a lever a short distance. Using leverage or mechanical advantage like through a gear train, a relatively small movement powers the blade movement from open to close (and back again on the E.T.). This is different than a flipper that relies on inertia after being launched with a firm push or flick.


Does anyone know of other knives that use a button or lever to move the blade directly, but the blade moves much more than the lever? These are the only two I've found so far. It is such an awesome design since it so rapidly and reliably opens the knife without the use of springs. And it could be much improved - the E.T. is weird and the LevRLok is pretty old.

[video=youtube;RXsy6Myw6gk]https://www.youtube.com/watch?v=RXsy6Myw6gk[/video]
 
Lee Williams makes some and Kershaw made two knives that were designed by him the OD-1 and OD-2

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Found some articles that indicate these types of mechanisms go back to the 19th century. Pretty cool.
 
Big lever on one side, clip on the other, no thanks. Not so friendly for the leftys. Looks uncomfortable and awkward.
 
Basp2005 said:
Big lever on one side, clip on the other, no thanks. Not so friendly for the leftys. Looks uncomfortable and awkward.
Click to expand...

This is the same concept, but considerably more svelte:

Kershaw-OD-1-1775-600x512.jpg
 
Yep, that's the one I had. It's a very fun knife.

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