AXIS lock or ULTRA lock ?..

orthogonal1 said:
Do you have any proof of that?

And remember, the "wave" is a specific structure, not a method of opening.
Click to expand...

United States Patent 5,878,500
Emerson March 9, 1999

Self-opening folding knife

A folding knife that is self opening when removed from a container such as a holster or pocket. The knife includes a handle and a knife blade with the blade hinged to the handle for folding from an extended, use, position to a stored position in a slot in the handle. A pin is formed on the knife blade adjacent to the hinged end, extending away from the blade when the blade is folded. When the knife is pulled from a container, the pin will snag the container just before the knife is fully removed, causing the blade to unfold to the use position. Preferably, the pin is hook-shaped with an end extending along the blade towards the blade tip. A releasable locking arrangement to lock the blade against folding while in use and for releasing the blade when desired for folding is preferably included.
 
100eyes said:
United States Patent 5,878,500
Click to expand...
where have I seen that before...

oh yeah, in patent 7036229, the one issued to Andrew Demko May 2nd 2006, he references the Emerson Wave patent in his own. USPTO considered his design an improvement, enough to get its own patent, and Cold Steel markets knives using it.
 
Demko's requires more structure that could be deemed not to be obvious.

The TiLite's "wave" feature hooks in the wrong direction to overcome the Emerson patent.

Functionality is given some weight in a product claim, but it is solid structural limitations that determine patentability and what is covered. Intended use, i.e. the self opening when being withdrawn from a container, is often ignored beyond what some structure may be capable of.
 
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I've used to play a litlle bit with CS' ultra and Bm axis simultaniously (AK47 vs 520).
Ultra lock sucks :grumpy:
- maybe i'm dumb, but releasing the u-l is almost impossible for me with one finger (thumb or forefinger). Axis can be released using only one finger.
- action in u-l is way far behind the axis
- u-l is very (!) vulnerable to dirt, sand especially :grumpy:

And the main reason is:
tadaaam



Someone had flattened the lock's main part, instead of leaving it round like in the axis. Match this little flattened part with the "channel" inside the blade tang and there you - effects are like I've mentioned.

Wish the CS would eliminate those two stupid mistakes. Without it, u-l would be equal to the axis :)
 
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Yes, that flattening is probably what causes my recon 1 to stick and operate very unsafely.
I mean, sometimes it doesn't even keep the blade closed. WTF
 
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