Hydraulock

[l0ckcr4ck3r]

Not a serious design for commercial development but might be fun to screw with someones head, all of these mods can be hidden from the outside with press-fit brass plugs

It also has a big advantage of decoupling the driver from the spring and so can not be bumped.

Link the tops of all the pin chambers with a small hole, then drill a large larger hole down the length of the mortise housing. Ream and polish the inside of the chambers and then make some custom drivers with a recess for O rings. Then make a large plunger with O rings, fill the whole thing with silicon oil and sit back and watch someone try and SPP it

[GWiens2001]

The plunger in the accumulator would need to have a fairly weak spring, or else the pins towards the back of the keyway would be under too much pressure for the key to comfortably enter the keyway fully. But it is a good idea, especially as bumping would not work.

What would you do for maintenance when the o-rings start to leak? (legitimate question)

Gordon

[l0ckcr4ck3r]

Gordon you're absolutely right. I toyed with the idea for several hours before deciding it was not a commercial option. As you say over time you will get corrosion in the chambers and breakdown of the Orings from thermal changes and end up with an oily mess. If you could solve this by using maybe a stainless housing and hightech polymers then the cost of machining and materials would again be prohibitively high. My original design had an intermediate oil chamber above the accumulator to act as an oil manifold, linked to each pin chamber... very similar to journal supplies in a crank case to try and maintain the same oil pressure to each bearing.
However when i realized it wasn't gunna be an idea i could develop i thought that it would be a fun lock for picking. You kinda want restricted oil flow for this. Each time your victim sets a pin and moves to the next stack and starts lifting, there will be a sudden pressure increase in the adjacent chambers that will hopefully just unset the previous pins!! kinda going round in circles If i had access to some machinery id probably make one for a laugh and mail it to one of the Youtube regulars and see what they made of it!! Just counter bore all the extra holes you've made, hammer in some turned brass of right diameter and file and sand... they would do well to spot the modifications. As you say, the "working key" test might give away that something was up

[asgardschosen]

I might be way off base here, but couldn't you make the lock work for keys? If you didn't fill the silicon oil chamber completely full. Instead you left a small air bubble equal to the displacement of all of the pins in their proper position. That way a key putting all the pins at the shear line would work fine (leakage aside), but picks and bumping which would overset pins would force others back down.

[C locked]

If you use the same viscosity oil and same type of o ring
As they use for door closers... Id bet you get at least 5 years

And I agree. If you allow an air "pocket".
But id suggest that instead of leaving an air pocket
Use Empty chamber fitted oneway valve

The correct key would work only because the lock once the fluid balanced
Of course any combination with the total of those cuts would fit in.
Any key that had a combination of more(shallower key) wouldn't get in or would get stuck
Any with less(deeper key) would fit in
Like having sized driver pins

The hydrolic aspect would provide some bump resistance
But i think that without the venting of a valve
That the suction of the hydrolics could allow for an issue to asire where a quick turn of the
cylinder once the correct key has been withdrawn (hence the drivers are above sheerline due to suction)
and the key pins are below it. [Using the american arrangement of lock]


But i do like the concept.
Would love to see you take your concept to prototype