Patent ID: 11927203
Assignee: A&A INTERNATIONAL, LLC
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  H  Y | IPC F

Claim 2:
3. A method comprising:
receiving energy in hydraulic fluid from an energy input at a first port of a first control valve and at a first port of a second control valve;
transferring the energy in the hydraulic fluid from the first ports of the first and second control valves to an accumulator unit;
storing the energy in the accumulator unit;
transferring the energy from the accumulator unit to a second port of the first control valve and to a second port of the second control valve;
transferring the energy from the second ports of the first and second control valves to first and second variable displacement hydraulic rotational units;
wherein the accumulator unit comprises:
a high pressure accumulator; and
a low pressure accumulator separate from the high pressure accumulator, the method further comprising:

transferring the hydraulic fluid from the first and second variable displacement hydraulic rotational units to a third port of the first control valve and to a third port of the second control valve; and
transferring the hydraulic fluid from the third ports of the first and second control valves to the low pressure accumulator.