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Jar Opening Tool

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Project by Jim Jakosh posted 1054 days ago 1811 views 8 times favorited 16 comments Add to Favorites Watch

This is a prototype tool I designed for someone like me that has arthritis and cannot grip a jar lid very good any more.
I was originally going to make it with the oval hole for your hand instead of having to “grip” a handle and I was going to make the end like a basin wrench with a serrated jaw on a hinge that wrapped around the lid. Then I saw one similar to this for sale with teeth on one side and a flat top so it sat on the lid. So I changed the design a bit. I used two pieces of pine from my cut off bin and milled the slots to insert 2 pieces of hacksaw blade for the grippers. I did that while it was in halves so I could get it done accurately. Then I just glued the 2 pieces together and routed the edges a bit to make it user friendly. The blades slide in and will stay with a little epoxy. I can take them out now to try another blade. In trying it, I’d say it needs the coarsest blade I can find. This one is 32 teeth and it slips. I have the blades installed so one is pointing up and the other down so they both engage in right direction. You can flip it over to tighten, too.

The oval hole lets your whole hand do the twisting.

The pine is stained with Zar Z118 dark mahogany and finished with clear lacquer.

-- Jim Jakosh.....Practical Wood Products...........Learn something new every day!! Variety is the Spice of Life!!





16 comments so far

View sedcokid's profile

sedcokid

2663 posts in 2197 days


#1 posted 1054 days ago

Jim, You are sure full of ideas!! Great Job…. And a Good lookin project as well!!

Thanks for sharing

-- Chuck Emery, Michigan,

View thiswoodshop's profile

thiswoodshop

140 posts in 1155 days


#2 posted 1054 days ago

Interesting, Nice Work.

-- Mo... For safety is not a gadget but a state of mind. ~ "Eleanor Everet" - www.thiswoodshop.com

View Transition's profile

Transition

339 posts in 1142 days


#3 posted 1054 days ago

I see a potential hazard if you are holding the jar with one hand and apply too much pressure with the other, and the tool slips, the pine splits, or the epoxy fails. A cut with the serrated hacksaw blades could be pretty nasty. However, I applaud the thought put into it!

-- Andrew, Orange County, CA - www.TransitionTurning.com

View peteg's profile (online now)

peteg

2816 posts in 1421 days


#4 posted 1054 days ago

Nice one Jim, might try one for myself, I to have dodgie hands at times these days.
To get aroud the # of teeth issue, could you “play” a bremel wheel cutter along the teeth & remove/ cut back, every second tooth or so? just a thought
Cheers Mate :))

-- Pete G: If you always do what you always did you'll always get what you always got

View jack1's profile

jack1

1907 posts in 2625 days


#5 posted 1054 days ago

BTKS just had a series on sledgehammers/handles that look would work for opening up jars too! ;0)

Seriously, a neat idea that is well made. Thanks

Jack

-- jack -- ...measure once, curse twice!

View jusfine's profile

jusfine

2280 posts in 1524 days


#6 posted 1054 days ago

Well done! I am going to make one for my wife.

-- Randy "You are judged as much by the questions you ask as the answers you give..."

View TopamaxSurvivor's profile

TopamaxSurvivor

14589 posts in 2274 days


#7 posted 1054 days ago

Interesting idea ;-)

-- "some old things are lovely, warm still with life ... of the forgotten men who made them." - D.H. Lawrence

View Dusty56's profile

Dusty56

11638 posts in 2286 days


#8 posted 1054 days ago

Is the Pine just a prototype ? I would fear that it might split on you while applying pressure to it.
Any thoughts about coarse grit sandpaper versus the blades ?
Have you ever tried holding the cap and turning the jar (providing the jar is larger than the cap) ?

-- I'm absolutely positive that I couldn't be more uncertain!

View Grumpy's profile

Grumpy

19313 posts in 2449 days


#9 posted 1054 days ago

Great idea Jim

-- Grumpy - "Always look on the bright side of life"- Monty Python

View Bob Collins's profile

Bob Collins

1507 posts in 2282 days


#10 posted 1054 days ago

Nice idea Jim., wife has no trouble opening jars.

-- Bob C, Australia. I love sharing as long as it is not my tools

View kiefer's profile

kiefer

2945 posts in 1265 days


#11 posted 1054 days ago

Great idea and reuse of scrap blades
Try some old jig saw blades or a piece of cog belt.

Kiefer

-- Kiefer 松

View Jim Jakosh's profile

Jim Jakosh

11063 posts in 1704 days


#12 posted 1054 days ago

Yes the pine is a prototype, just to prove the concept with 2 blades. I’ll probably choose oak for the final version.The plastic one I saw that was sold in a kitchen shop had a cover on top to keep it parallel with the lid, but the teeth on the blade were going the wrong way and it was best for tightening. That is why I made this one to flip either way. Guess where the plastic one was made??

G’day Pete, I was thinking the same thing about grinding the teeth with a Dremel cutter to make them coarser. Next thing is to find an 8 or 10 tooth hacksaw blade. I even want to try one with 2 blades along side each other on both sides.That will take a lamination of a thin piece in between the two sides to create two parallel grooves.
You can buy things like this, but you appreciate them better if you make them your self!!

Bob, I do the jar opening because my wife can’t and pretty soon we’ll have to hire it done unless I get a good tool made!!

Dusty, I was thinking about sandpaper, but if the contents of the jar spill over, as they do sometimes, the sandpaper would get loaded up or break down and come off.

I was thinking if I get a good working one, I might be able to show it on the Martha Stewart show.!!!

-- Jim Jakosh.....Practical Wood Products...........Learn something new every day!! Variety is the Spice of Life!!

View Dusty56's profile

Dusty56

11638 posts in 2286 days


#13 posted 1054 days ago

Wet and dry sandpaper , probably 60-80 grit should be fine…rinse it off before the stuff dries onto it .
I’ve also had good luck with a piece of router / sanding mat…the stuff with holes in it….also used as drawer liner.
Get a grip , Jim ! LOL

-- I'm absolutely positive that I couldn't be more uncertain!

View Jim Jakosh's profile

Jim Jakosh

11063 posts in 1704 days


#14 posted 1054 days ago

Hi Kiefer, what scrap blades? That was a new one, but not a bi-metal blade….......Jim

-- Jim Jakosh.....Practical Wood Products...........Learn something new every day!! Variety is the Spice of Life!!

View mafe's profile

mafe

9453 posts in 1687 days


#15 posted 1053 days ago

Cool idea, all we can do to make life more easy.
At the end it is amazing we put food in a jar we cant open… And then they say we are more clever than the animals that eat right of the trees…
Big smile,
Mads

-- Mad F, the fanatical rhykenologist and vintage architect. Democraticwoodworking.

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