Patent ID: 9718653
Date: 2017-08-01
CPC Classifications: B63B,B65G,B66C,B66D,F16F

Claim:
1. A device for compensating for heave movements between a lifting device and a load lifted by the lifting device, the device comprising: an elongated length extension device comprising: an elongated cylindrical gas accumulator comprising: an adjustable liquid transferring device fluidly connected to the liquid outlet of the lower end of the length extension device and the liquid outlet of the lower end of the cylindrical gas accumulator, the adjustable liquid transferring device having a second valve; an activator for selective opening or closing of one or both of the first valve and the second valve; a first and second pressure and temperature sensor for measuring a temperature and/or pressure of the liquid in at least one of the first lower liquid filled chamber and the second lower liquid filled chamber and the gas in the upper chamber of the cylindrical gas accumulator, respectively; a position sensor for measuring the position of the first piston; and a control unit comprising: