Building assisted open knives

Jim Adams Customs

Jim Adams Customs

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Jun 23, 2008
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I am wanted to build assisted open tactical folders. Is it as easy as the blade be held by detent ball in the closed position have I complete missed the whole concept?
I have studied the liner lock knife. Now I am ready to build one. I have started my tools list. I would like to add the tools to do the spring system on an assisted opening knife.
 
...It's the very first thing I did when I bought mine. I'm like that.

If you are really interested, I would buy an example of each brand of AO, as they all have their own patents and mechanisms.
 
What about the Patent? is the liner lock not patented? I am also in the process of making some assisted openers, liking the benchmade axis lock. Guess you can make them for personal use but what about for sale? anybody know?
 
I would like to know more about the assisted opening as well and how they are made, if anyone can chime in?
 
Take a good look at one, and you will see that the heel of the blade becomes a cam. It is moved upward by the strong backspring. With a quick flip, the motion propels the blade all the way open to the locked position. Everything must be exact, and all motion must be without any bind. Master the standard liner lock and then try an assisted opener.
 
Halecky Knives said:
What about the Patent? is the liner lock not patented? I am also in the process of making some assisted openers, liking the benchmade axis lock. Guess you can make them for personal use but what about for sale? anybody know?
Click to expand...
Liner lock isn't patented.
Thanks Mr. Walker!
If you make and sell something that infringes on someones patent, you can, and should be sued..
 
Yep what Frank says is spot on IMO. copying patented stuff is only in violation if you sell it. If its for you make what you want, but I am in agreement that you should make a liner lock first. Master that and then move on to the more complex mechanisms.
CW
 
Frank Niro said:
You can copy one for yourself but not to sell. Not complicated at all. Frank
Click to expand...

Well yes, if the patent is still in effect. In general If a patent was issued before 1995 it is good for 17 years. If issued after 1995 then it is good for 20 years. Once a patent expires the technology becomes public.
 
Here is the inside of a SOG Flash. It has a coil spring behind the blade that you can't see in the picture. One end of the coil spring inserts into a hole in the blade, the other end into the handle scale. The entire coil spring sits in a recess in one scale. If you take one of this type apart, do so with the blade open. When closed the lockbar and spring are in compression, if you pull the knife apart both pieces will fly across the room to never be seen again. Also be careful pulling the blade from that scale as the coil spring has a tendency to shoot out as well.

The scale with no blade holds the slide bar that is used to unlock the open lock. The detent ball is to hold the closed lock in the locked or unlocked position.

97422600.jpg
 
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