Patent ID: 8240143

Claim:
A hydraulic circuit for recovering energy, which circuit comprises at least one hydraulic motor, two main ducts for feeding or discharging said at least one motor, a low-pressure fluid source, and a high-pressure accumulator forming a high-pressure fluid source, the circuit being suitable for operating in energy recovery mode in which the feed main duct is connected to the low-pressure fluid source and the discharge main duct is connected to the high-pressure accumulator, and in energy delivery mode in which the feed main duct is connected to the high-pressure accumulator and the discharge main duct is connected to the low-pressure fluid source, said low-pressure fluid source comprising a high-flow-rate booster pump suitable for delivering, from a pressure-free reservoir, a flow-rate of fluid that is sufficient to feed fluid to said at least one hydraulic motor while said motor is at maximum speed in energy recovery mode and an adjustable pressure limiter suitable for being controlled so as to cause the pressure of the fluid at the low-pressure fluid source to vary.