Patent ID: 8307905

Claim:
An activating mechanism for activating a downhole tool, comprising a sleeve having non-through-going recesses arranged in the material of the sleeve, said recesses being interconnected with one or more channels, at least one of said channels having an upper and a lower piston in fluid connection thereto arranged at opposite ends of the channel, said at least one channel further comprising a slide arranged therein, said slide having a first closing position and a second opening position, and further wherein a pump and a reservoir of a working fluid are arranged in one or more of the recesses and adapted to pump, in response to cyclic loads, the working fluid into the channel whereby the slide is moved from its closing to its opening position, in which opening position a fluid connection is opened up between the upper and the lower pistons, whereby movement of the upper piston is transmitted to the lower piston, said movement of the lower piston being arranged to operate the downhole tool.