Patent ID: 8358020

Claim:
An energy storing system, comprising a plurality of weights ( 12 ); a first storing unit ( 14 ) and a second storing unit ( 16 ), wherein the first storing unit ( 14 ) is arranged below the second storing unit ( 16 ) and each of the storing units ( 14 , 16 ) comprises a guiding track ( 18 , 20 ) on which weights ( 12 ) can be placed and along which weights ( 12 ) can be moved, wherein each of said guiding tracks ( 18 , 20 ) comprises a first portion ( 22 , 26 ) and a second portion ( 24 , 28 ), wherein the second portion ( 24 , 28 ) is arranged below the first portion ( 22 , 26 ); and a loading unit ( 30 ) configured to lift at least one weight ( 12 ) from the first storing unit ( 14 ) to the second storing unit ( 16 ) during a first period thereby converting electrical energy to potential energy, said loading unit ( 30 ) further configured to lower at least one weight ( 12 ) from the second storing unit ( 16 ) to the first storing unit ( 14 ) during a second period, thereby converting potential energy to electrical energy, wherein the loading unit ( 30 ) is configured to collect a weight ( 12 ) from the second portion ( 24 ) of the first storing unit ( 14 ) and to place said weight on the first portion ( 26 ) of the second storing unit ( 16 ) during the first period and to collect a weight ( 12 ) from the second portion ( 28 ) of the second storing unit ( 16 ) and to place said weight ( 12 ) on the first portion ( 22 ) of the first storing unit ( 14 ) during the second period.