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Locking Pliers Spring

1318 Views 9 Replies 4 Participants Last post by  runswithscissors
Hi, Everyone!

I wonder about the function of the spring in a locking plier. I removed it from my Vise Grips and the tool still works perfectly. But I think that is a nonsense keeping a component without utility in a tool. So you guys can point the purpose of the spring, other than to keep the pliers closed when not in use??

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I'm surprised the Vise Grip still works normally. I believe the spring is what holds the plier open until you squeeze the handles to lock it onto something. I know when I lose the spring, mine become really floppy-still useable, but annoying.
Hi, runswithscissors!

Thank you for sharing your experience using a Vise Grip without spring.

So, the FUNCTION of the tool could not be affected, but his USABILITY became impaired. Interesting!

I´m a Industrial Design student from Brazil and I want to develop a locking plier that may have atributes of manual and automatic ones. My aim is to develop a tool with a great grip, with a faster adjustment system.

Your comment has great value to my work. I really apreciate it! Thanks, again!

Did you ever used an automatic locking plier, like C.H. Hansom? They are good or junk?

Sorry for my english!

If someone have something more to sharing about locking pliers (the good, and, mostly, the BAD experiences), feel free to sharing here!

Thank you all!
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I have 2 automatic pliers. One is a long nose model that works pretty well. Has adjustable tension, but automatically adjusts to the size of whatever you're gripping. It's weakness is that you can't squeeze something together with it. For example, I can hold it open with my fingers and clamp it, and it won't press my fingers together. But it's fine when you get it locked on something solid. It's small, and not very powerful. I Forget the brand. I've had it for at least 20 years.

The other is a completely different design, Chinese origin, I think. It works well except when it jams, and can't be closed. May be a flaw in the design, or in manufacturing precision.

Your English is better than my Portuguese.

This is the one that jams open and doesn't want to close
Wood Knife Everyday carry Tool Hunting knife

This is the one I use most. It is pretty reliable, except for the limitation that I mentioned.
Wood Tool Knife Blade Wood stain


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Me again. I forgot to mention that the plier in the top section has the advantage that the jaws stay parallel throughout the whole grip range. Too bad it doesn't work more smoothly.
Hy, bud!

How unusual they are! I think that the first one (the jamming one) is very similar to that:

The long nose model don´t looks too confortable to hold. But, as you said, you shouldn´t apply too much force, because they´re not very powerful.

The paralell system is veeeery nice!! I´ll I will implement a system to maintain the jaws parallels too…

"Your English is better than my Portuguese." hahahahah!!!! probably!!

Thak you, again!
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Do you know who and when the vice grips were invented??

It was a Danish blacksmith named William Petersen in 1924 in De Witt, Nebraska.
Hi, Redoak49!

Yes! He´s a lucky guy, because, when the WWII begins, he was the one who can to fullfill the government contracts. He made a lot of money and could invest in his enterprise!

He was a great inventor and businessman. The Vise Grip have a great design because it works very well, is cheap, and have no strange gimmick features!
Happen to use a different type of Visegrip pliers
Wood Motor vehicle Automotive design Floor Aircraft

Since they seem to hold jigs and other parts in place. Jig is for doing a mortise in a door's stile. I have used these to clamp a metal angle iron to a concrete form, then screw the two items together. More of a portable vise.


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tirmey: Thanks for the link to Free Patents Online. I didn't know such a site existed. I actually do have an invention that I may or may not try to develop into a marketable item. But I've hesitated to pursue it, because I know patents can be very expensive to get. I may just develop it with out a patent, and figure I can sell a few before the Chinese decide it's worth copying.

bandit: I use those C clamp vise grips for welding
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