Hydraulic Shocks - how to get/install/use them...?
I recently obtained a nice massage table for my wife (she does massage, studying to be an aesthetician too)... and it has a very nice feature; beneath the head-end of the table, there is a little lever, when depressed it raises from flat to about 60 degrees; and stops at any point in between as soon as the lever is released. And it stays there, even with most of my weight (250 pounds or so) pushing down against it. As soon as you press the little lever, it can be moved up or down again.
I looked it over, and much of the mechanism is hidden, but I can see it relies on a (deceptively small) gas shock or hydraulic shock, like what is used in many car trunks and 3rd/5th door lifts for SUVs and hatchbacks. Though, obviously much stronger than those devices.
So my question is, where can I find one of these things, and how does it come to be controlled by a little lever so that it can stop at any given point and bear a load without moving until the level is once again depressed?
The main reason for my query is that the massage table is too narrow by far, and I plan on making a bigger one for her, with a few nicer features; but that is one I have no idea how to duplicate at the moment!