Abstract: The invention relates to a hydraulic circuit provided with at least one hydraulic power machine (2, 4) connected to a low-pressure circuit (6) and to a high-pressure circuit (10) transmitting said power, wherein the machine is provided with a drain which allows internal leaks in the casing thereof to flow towards a low-pressure accumulator (8) or a vessel at atmospheric pressure, said circuit comprising an intake pipe (30) connecting the low-pressure circuit (6) to the casing of the machine, and an outlet pipe (36) forming the drain receiving the flow from the intake pipe in order to guide same towards the vessel (8), including a heat exchanger (42) and a filter (44) forming the fluid treatment elements for the entire hydraulic circuit, said circuit also comprising a means for monitoring the flow (40) in the intake and outlet pipes.

Abstract: A hydraulic circuit designed for a hybrid vehicle provided with a hydraulic machine (22) and a pump (20) linked to a transmission (4) driving the wheels of the vehicle, said machine and said pump being linked together in order to allow direct exchanges of fluid that take place in a very high pressure circuit (42) not comprising a pressure accumulator, characterized in that the very high pressure circuit (42) comprises safety means (110) which, in case of overpressure, discharge the fluid to a limited pressure circuit (40) provided with a pressure accumulator (46).

Abstract: The invention relates to a hydraulic circuit provided with at least one hydraulic power machine (2, 4) connected to a low-pressure circuit (6) and to a high-pressure circuit (10) transmitting said power, wherein the machine is provided with a drain which allows internal leaks in the casing thereof to flow towards a low-pressure accumulator (8) or a vessel at atmospheric pressure, said circuit comprising an intake pipe (30) connecting the low-pressure circuit (6) to the casing of the machine, and an outlet pipe (36) forming the drain receiving the flow from the intake pipe in order to guide same towards the vessel (8), including a heat exchanger (42) and a filter (44) forming the fluid treatment elements for the entire hydraulic circuit, said circuit also comprising a means for monitoring the flow (40) in the intake and outlet pipes.

Abstract: Hydraulic circuit comprising a low-pressure circuit (6) fed by a booster pump (4) that draws from a very-low-pressure reservoir (2), characterized in that this very-low-pressure reservoir (2) is leaktight and has a device for placing the internal volume (12) under negative pressure with respect to atmospheric pressure.

Abstract: A booster device for a hydraulic circuit comprising a high-pressure circuit (12) and a low-pressure circuit (16) connected to a system generating the high pressure and to receivers, said booster device maintaining a minimum pressure in the low-pressure part, characterized in that it comprises a hydraulic motor (30) of which the inlet is connected to the high-pressure circuit (12) and the outlet to the low-pressure circuit (16), which drives a booster pump (20) sucking the fluid from a reservoir (24), in order to discharge it into this low-pressure circuit.

Abstract: The invention relates to a device for elastic suspension of an assembly of reservoirs (50, 60) on the underbody of a motor vehicle. The reservoirs (50, 60) are mounted substantially in parallel and have a substantially cylindrical general shape terminated by two shaped end pieces (50A, 50B; 60A, 60B). Said novel suspension device comprises two flanges (10, 11), which fit closely to the shaped end pieces (50A, 50B; 60A, 60B) of the reservoirs (50, 60) and are linked together by tie rods (30) gripping said reservoirs (50, 60), and a plurality of arms (40A, 40B, 40C, 40D) which link the flanges (10, 11) to a plurality of elastic connection points of the suspension device on the vehicle body.

Abstract: The invention relates to a device for elastic suspension of an assembly of reservoirs (50, 60) on the underbody of a motor vehicle. The reservoirs (50, 60) are mounted substantially in parallel and have a substantially cylindrical general shape terminated by two shaped end pieces (50A, 50B; 60A, 60B). Said novel suspension device comprises two flanges (10, 11), which fit closely to the shaped end pieces (50A, 50B; 60A, 60B) of the reservoirs (50, 60) and are linked together by tie rods (30) gripping said reservoirs (50, 60), and a plurality of arms (40A, 40B, 40C, 40D) which link the flanges (10, 11) to a plurality of elastic connection points of the suspension device on the vehicle body.

Abstract: A hydraulic circuit designed for a hybrid vehicle provided with a hydraulic machine (22) and a pump (20) linked to a transmission (4) driving the wheels of the vehicle, said machine and said pump being linked together in order to allow direct exchanges of fluid that take place in a very high pressure circuit (42) not comprising a pressure accumulator, characterised in that the very high pressure circuit (42) comprises safety means (110) which, in case of overpressure, discharge the fluid to a limited pressure circuit (40) provided with a pressure accumulator (46).

Abstract: A booster device for a hydraulic circuit comprising a high-pressure circuit (12) and a low-pressure circuit (16) connected to a system generating the high pressure and to receivers, said booster device maintaining a minimum pressure in the low-pressure part, characterised in that it comprises a hydraulic motor (30) of which the inlet is connected to the high-pressure circuit (12) and the outlet to the low-pressure circuit (16), which drives a booster pump (20) sucking the fluid from a reservoir (24), in order to discharge it into this low-pressure circuit.