My idea for a 3 piece titanium or steel handle barrel knife

fsir said:
hmm… perhaps a thin and lightweight metal rod that stores in the handle and can be screwed and unscrewed onto the blade base so as to allow easier guidance of the blade through handle and slit?
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Another part?!? Though it could be a firesteel.
 
Lots of high stress points for multiple failures. The main one being that there's not much surface area between the block and the inner tube. To make it thicker means a smaller, thinner blade in order to fit the inner tube when not deployed.
There's nothing wrong with new ideas but to come into general with an incomplete concept and expecting praise is not likely to happen, when the engineer came to the fabricators and said build this he didn't give us drawing on a napkin although I have seen some pretty complex concepts laid out on the backs of envelopes.

There are ideas that could be worked out as a one off but anytime you start looking at production runs and keeping a profit margin everything changes. Actually if you want help trying to make this you're in the wrong forum.

Try one of the knife making forums or maybe tinkering and embellishment, I think you'll get the reception you want, maybe. The best thing you could do is make one, it doesn't look overly complicated but the execution of making one could prove different. I strongly recommend you examine the Swedish barrel knives closely and any similar knives. Learn why they made theirs work and you might discover why yours won't buy the best thing you can do is try to make one, make it out of wood, or file some aluminum till you make a prototype. Basic tools should get you close enough to decide if it's a viable concept
 
killgar said:
I don't get this^ part. I carry a fixed-blade TO USE IT. I'm not looking to spare my fixed-blade from being used.

If I had to choose between taking the time to put a knife together to cut something, or simply pull my fixed-blade from it's sheath, I'd choose my fixed-blade.

If a person anticipates needing a knife for any type of emergency/survival situation, I think it would be best if the knife they chose were as simple as possible and did not require assembly of any kind.

Also, consider the possibility that during an emergency/survival situation you might be in the dark, or that you may have suffered an injury to one hand that renders it useless.

A fixed-blade, and many modern folders can easily be opened and used with one hand. Your design involves multiple loose pieces and requires several acts, and two hands, just to put it together before you can use it.
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'

Sure to all that. But if you break your fixed blade can you replace it with another blade without replacing the whole knife? Conceivably, you can carry multiple blade replacements on you for my proposed design.

As for using your fixed blade, perhaps you want to keep it sharp and in good shape in case of an emergency and would rather let a less important knife do as much of the general work as possible? And so you use the multi-piece blade to collect firewood and small tasks. That's why I have my Opinel Outdoor No. 8. If I lose the ability to use both arms, I can always switched to my fixed blade. This is a non-issue.
 
What's interesting is from a patent viewpoint, this potentially has enough novelty to be unique.

Granted, I am NOT a patent attorney but I work with a good amount of engineers and have been included on a few patents so I've seen what goes into developing a patent.

The key here, and correct me if I'm wrong... Is that the knife blade is completely detachable from the handle and can be STORED within the handle when not in use, correct?

Something to note is that a folding knife has a pivot motion/mechanism that allow the blade to come out of the handle, whereas this design has the blade completely "free" of the handle and requires assembly by the user.

Now the trick part... What is the benefit over existing designs that would make this something worthy of a patent and give it a better likelihood of being issued? Is it because the blade is completely sealed in the tube? That the assembly of the blade to the handle keeps it from "lock-failure"? Not readily apparent from what's been described thus far.

Should you patent it, fsir? Not if you don't want to.
If you want to actually make a few and sell them to others, you're more than within your rights to do so but keep in mind that if you have a good enough idea that others want to steal it...
 
fsir said:
great idea. fire steels can have threads on one end sometimes. there you go.
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But where would it go when the knife was put away back into the tube and sealed up? You wouldn't want it rattling around inside the inner tube next to the blade.
 
fsir said:
'

Sure to all that. But if you break your fixed blade can you replace it with another blade without replacing the whole knife? Conceivably, you can carry multiple blade replacements on you for my proposed design.

As for using your fixed blade, perhaps you want to keep it sharp and in good shape in case of an emergency and would rather let a less important knife do as much of the general work as possible? And so you use the multi-piece blade to collect firewood and small tasks. That's why I have my Opinel Outdoor No. 8. If I lose the ability to use both arms, I can always switched to my fixed blade. This is a non-issue.
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It sounds like what you are describing when you speak about your knife design is- a solution looking for a problem.

First, I can't conceive of using my fixed-blade in any manner that would break it. And if I thought a fixed-blade could be broken using it in an emergency/survival situation, I'd choose a better fixed-blade.

Second, I choose fixed-blades with good steel. So I don't worry that they will be easily dulled by any task I might use them for.

Third, I know how to sharpen a knife. It's pretty easy, especially if I'm also carrying a hone.

And if I wanted to carry a backup knife, there are many to choose from that do not require me to assemble them from multiple parts in order to use them. Heck, if I wanted a backup to my fixed-blade, I'd probably choose another fixed-blade. Or, I'd choose one of the numerous capable folders already on the market that do not require any assembly.
 
brancron said:
But where would it go when the knife was put away back into the tube and sealed up? You wouldn't want it rattling around inside the inner tube next to the blade.
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True. And the rod isn't really going to help, since you cant see the slot from that side anyway...the disk blocks the view entirely. And from the slot end, you are not going to be able to see inside the tube. No light.
 
T. Erdelyi said:
Lots of high stress points for multiple failures. The main one being that there's not much surface area between the block and the inner tube. To make it thicker means a smaller, thinner blade in order to fit the inner tube when not deployed.
There's nothing wrong with new ideas but to come into general with an incomplete concept and expecting praise is not likely to happen, when the engineer came to the fabricators and said build this he didn't give us drawing on a napkin although I have seen some pretty complex concepts laid out on the backs of envelopes.

There are ideas that could be worked out as a one off but anytime you start looking at production runs and keeping a profit margin everything changes. Actually if you want help trying to make this you're in the wrong forum.

Try one of the knife making forums or maybe tinkering and embellishment, I think you'll get the reception you want, maybe. The best thing you could do is make one, it doesn't look overly complicated but the execution of making one could prove different. I strongly recommend you examine the Swedish barrel knives closely and any similar knives. Learn why they made theirs work and you might discover why yours won't buy the best thing you can do is try to make one, make it out of wood, or file some aluminum till you make a prototype. Basic tools should get you close enough to decide if it's a viable concept
Click to expand...


great advice. thank you. Definitely learning what i need to learn. I had no illusions my presentation was not up to engineer specs, though. :D But if an engineer or knife maker thinks they see something in this and feel they can improve this and run with it, they have my unconditional blessings. There are some knife makers who just want to make a tough knife, even if it's only a very limited run and aren't as concerned with making a profit.

I gave it a shot and if people can't see it working, whether it's from my presentation or the whole idea, that's cool. No harm, no foul.
 
marcinek said:
True. And the rod isn't really going to help, since you cant see the slot from that side anyway...the disk blocks the view entirely. And from the slot end, you are not going to be able to see inside the tube. No light.
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I think the a solution might be a track cut into the interior of the large tube, and a small protrusion on the side of the blade block that can run through the track. Maybe more than one track and more than one protrusion. Putting aside the obvious engineering problems, this would solve the "getting the blade through the slot" problem, and might also help cut down on clockwise/counter-clockwise blade play when the knife is fully assembled.

Things are getting complicated though!

A note to all: I think it's more fun to play with the concept and see how it can be made to work (at least on paper) rather than tear down the idea itself, which is admittedly not the most useful one.
 
marcinek said:
True. And the rod isn't really going to help, since you cant see the slot from that side anyway...the disk blocks the view entirely. And from the slot end, you are not going to be able to see inside the tube. No light.
Click to expand...

There can be an indented track along the inside of the handle and the blade block or disc could have a comparable nub extension that fits in it and holds the blade at an angle that lines it exactly up with the slit at the bottom of the handle.
 
killgar said:
Or, I'd choose one of the numerous capable folders already on the market that do not require any assembly.
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All knives require assembly, even a fixed knife if it has scales. If I want this design assembled I can just leave the house with it assembled and in a sheath..
 
orezona said:
The key here, and correct me if I'm wrong... Is that the knife blade is completely detachable from the handle and can be STORED within the handle when not in use, correct?

..
Click to expand...

Correct.

orezona said:
Should you patent it, fsir? Not if you don't want to.
If you want to actually make a few and sell them to others, you're more than within your rights to do so but keep in mind that if you have a good enough idea that others want to steal it...


..
Click to expand...

I don't want to patent it. In my ideal scenario a good knife maker will pick up the idea, run with it and make a knife I can buy. I place no conditions on the use of this idea.
 
You're justifying the need for a better knife that already exist, any small folder will take up les room, is less prone to failure, cheaper to produce using existing production methods and it won't replace a fixed blade. Where do you keep the extra blades so that they're safe to carry and maintain an effective edge?

Again it's an incomplete concept that addresses no problems, it doesn't make for a better knife just different a d if I'm depending on it for my survival some how there are better options.

Don't give up though you might work out something usable from it, a good designer learns from every knife, the successes and mistakes alike.
 
There are already folding knives that are strong enough that the blade will break before the handle will. The only conceivable benefit to this design is being able to carry multiple blades, but carrying an extra blade would take up as much room as carrying a second complete knife, so you might as well just carry more than one folder if you're that worried about breaking your blade.

I honestly think people are too obsessed with knives breaking in survival situations. If you use your knife properly you don't need an overly robust design at all to prevent failure of the knife.

As a novelty, though, I'd say it's at least a little bit interesting. You'd probably find a market for them if they were cheap enough.
 
So... What if it had a button you could press and a spring inside so the assembly time was greatly diminished?
 
fsir said:
It's very similar to this knife in concept except the blade slips into and is secured inside the hollow handle instead of screwed to the handle.

503112221_771.jpg
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What brand of knife is this btw?
 
brancron said:
Another thing you might have to figure out is how you're going to stop the tip of the blade from becoming blunted and dulled when assembling the knife. Dropping the blade into the handle and then turning it until it lines up with the slot would cause a lot of damage to a sharp tip if it were metal rubbing against metal.
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I've thought about this some more and think this may not be as big a problem as it seems. The knife blade (with attached disc) will only be slightly shorter in length than the handle. Therefore, getting the blade through the slot might only require looking down the handle to see how the slot is lining up, line the blade up with it as you lower it into the handle and then, as the tip has nearly reached the bottom of the handle, just let go of the base of the blade and let it drop into the handle and the blade through the slot.

Perhaps we can even assist this procedure at a low cost by adding markers to the outside of the handle and disc to ensure an accurate line up?

And, if we want, we could always add length to the blade so it is as long as the handle (without cap) so a user need not drop the blade at all and be able to hold the disc end of the blade to gently make minor adjustments until the blade slides smoothly through the slot. A concave cap could accommodate the extra length of blade when the blade is in the flipped in configuration.

By George, I think I've got it!

And it didn't require a track!
 
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