Power take off system for wave energy convertor

A method for generating electrical energy from mechanical motion, the method comprising:

• receiving an input force from a mechanical motion;
• modifying the input force, wherein modifying the input force further comprises receiving the input force at a pumping cylinder and converting the input force to an output force at a driving cylinder, wherein:
• the pumping cylinder comprises a pumping tandem cylinder comprising first and second pistons connected to a first rod in a configuration to move together in the same compression stage at the same time, wherein the pumping tandem cylinder comprises a first pumping chamber and a second pumping chamber;
• the driving cylinder comprises a driving tandem cylinder comprising third and fourth pistons connected to a second rod in a configuration to move together in the same compression stage at the same time, wherein the driving tandem cylinder comprises a first driving chamber and a second driving chamber;
• and
• the first pumping chamber is fluidly connected to both the first driving chamber and the second driving chamber;
• and
• the second pumping chamber is fluidly connected to both the first driving chamber and the second driving chamber;
• and
• applying the output force to a generator disposed within an interior of a surface float.

A buoy apparatus for generating electrical energy from motion of ocean waves, the apparatus comprising:

• a surface float;
• a generator disposed within an interior of the surface float;
• a tether coupling point;
• a force modifier disposed at least partially within the interior of the surface float and coupled to the tether coupling point, the force modifier to receive at a pumping cylinder an input force from the tether coupling point, convert the input force to a modified output force at a driving cylinder, and apply the modified output force to the generator, wherein the force modifier comprises a hydraulic system, and wherein:
• the pumping cylinder comprises a pumping tandem cylinder comprising first and second pistons connected to a first rod in a configuration to move together in the same compression stage at the same time, wherein the pumping tandem cylinder comprises a first pumping chamber and a second pumping chamber;
• the driving cylinder comprises a driving tandem cylinder comprising third and fourth pistons connected to a second rod in a configuration to move together in the same compression stage at the same time, wherein the driving tandem cylinder comprises a first driving chamber and a second driving chamber;
• and
• the first pumping chamber is fluidly connected to both the first driving chamber and the second driving chamber;
• and
• the second pumping chamber is fluidly connected to both the first driving chamber and the second driving chamber.