So the situation is as follows:

I have an external Hard Drive. The one, which is powered only from USB. It's difficult to tell the model, as it was bought from the Internet as Western Digital 500GB, but when delivered it turned out to be fake ( well it was suprisingly cheap, and should've read the description more carefully). However it worked fine, so it wasn't really a problem. Two weeks ago it suffered an airplane transportation ( i say suffered, because it was transported in the luggage , somewhere in the bottom of the bag), and after that it doesn't mount in to OS.
When plugged in,  it starts working, so the power is supplied, but the OS doesn't react. Tried using different cords, the effect is identical. Also tried on Windows Vista, and then tried manually mounting the drive on PC-BSD OS. Both systems couldn't detect it. Other drives mount normally.

I suppose, that it's not really possible to make it work normally. 
Are there may be ways to, at least, extract the data from it ?

Apparently sometimes if you put the drive in an airtight bag in the freezer for a day or so that can help by contracting the internal components wiorth a try

I've heard this method referenced on this board and in the SANS Advisory Board list and have a question.  If putting a drive in the freezer would you want to use silica gel packs?

Thanks for the insight.

I tried it some time ago as well and it worked here too - though I would recommend once it is running again to backup the files somewhere else and use the previously damaged hdd no longer.