An hydraulic apparatus (100) for energy recovery in an operating machine comprising an hydro-pneumatic accumulator (14) able to accumulate, during the operation of lowering of an operative load (111) by an operating machine (1), a volume of oil with a fixed amount of an inert fluid, and the pre-charge pressure (Po) of which, before the beginning of the accumulation, is adjusted according to the variations of pressure of the oil inside the hydraulic cylinders (12,13) which act on the operative load (111), in such a way to accumulate the maximum hydraulic energy made available by the lowering of operating load (111), that is to maximize the average pressure of hydro-pneumatic accumulator (14) during the phase of accumulation of energy.

A fluid pump inlet stabilizer dampener includes a deformable diaphragm separating an enclosure into a gas chamber and a liquid chamber; and a piston coupled to the deformable diaphragm and being movable with respect to a valve housing, wherein the piston is configured to be positioned in at least first, second, and third positions, wherein in the first position a first fluid flow path from a pressurized gas inlet port to the gas chamber is open, in the second position the first fluid flow path is closed, and in the third position the first fluid flow path is closed and a second fluid flow path that activates a venturi vacuum generator is open.

A gas piston accumulator with a piston-cylinder unit, the hydraulic space of which can be connected to a hydraulic line. A pressure piston biased with a biasing force acts on the hydraulic space in order to pressurize the hydraulic fluid in the hydraulic line with an accumulator pressure. The biasing force is achieved by a gas pressure in a gas space which is separated from the hydraulic space via the pressure piston, at least one cylinder base of the gas piston accumulator being assigned to the pressure piston as a mechanical stop, and the pressure piston having an axially set back piston main body, on the gas side of which and/or on the hydraulic side of which there protrudes a stop structure which is of reduced area compared to the respective pressure piston side and which can be brought into pressure contact with the cylinder base.

Aspects relate to systems and methods for controlling landing gear of an aircraft. An exemplary system includes a nose gear located at a nose of the aircraft, where the nose gear includes a nose piston configured to allow for displacement of a nose wheel relative the aircraft, a main gear located aft of the nose gear, where the main gear includes a main piston configured to allow for displacement of a main wheel relative the aircraft, a hydraulic circuit in fluidic communication with each of the nose piston and the main piston, and a compliant element in fluidic communication with the hydraulic circuit and configured to provide a compliant response at one or both of the nose piston and the main piston.

This invention relates to hydraulic energy storage and management systems. In particular, this invention relates to a hydraulic energy management system that has a reconfigurable energy storage and release capability that adjusts to varying available energy input and power demand output requirements. The hydraulic energy management system can be resized by a hydraulic bridge circuit to permit hydraulic power units to be added or removed, both physically and operationally, to capture available energy over time, adjust to peak demand cycles, and maintain power output in the event of a failure of a portion of the system.

This invention relates to hydraulic energy storage and management systems. In particular, this invention relates to a hydraulic energy management system that has a reconfigurable energy storage and release capability that adjusts to varying available energy input and power demand output requirements. The hydraulic energy management system can be resized by a hydraulic bridge circuit to permit hydraulic power units to be added or removed, both physically and operationally, to capture available energy over time, adjust to peak demand cycles, and maintain power output in the event of a failure of a portion of the system.

A fluid pump inlet stabilizer dampener includes a deformable diaphragm separating an enclosure into a gas chamber and a liquid chamber; and a piston coupled to the deformable diaphragm and being movable with respect to a valve housing, wherein the piston is configured to be positioned in at least first, second, and third positions, wherein in the first position a first fluid flow path from a pressurized gas inlet port to the gas chamber is open, in the second position the first fluid flow path is closed, and in the third position the first fluid flow path is closed and a second fluid flow path that activates a venturi vacuum generator is open.

An annular tube (or other shape) of elastomeric cellular material comprising elastomeric closed cells having gas infused therein is supported by structures protruding from the bottom surface of a suction stabilizer's head and/or by structures within the interior volume of the annular body of the suction stabilizer, preferably with spacing between the outer diameter of the annular tube of the cellular material and the inner walls of the suction stabilizer body. The gas-infused closed cell material may thus be employed in new suction stabilizer or pulsation dampener or to retrofit existing suction stabilizers or pulsation dampeners designed for a gas-filled bladder.

A plunger pressure accumulator includes a shell; and a plunger which is adapted to move relative to the shell into an interior space of the shell. The interior space is divided into at least two subspaces, a first subspace of which is suppliable with hydraulic fluid of an external system and a second subspace which is provided with a pressurized gas. Between the plunger and the shell is arranged a slide element upon which the plunger is supported to move to a distance apart from an internal surface of the first subspace and from an internal surface of the second subspace. The plunger pressure accumulator is provided with at least one regenerator which is stationary relative to the shell or the plunger.

A large-capacity bag-type constant-pressure accumulator comprises a shell and a bag placed in the shell, as well as a variable area piston, a floating piston, a piston, and a flange. On the piston rod of the variable area piston is mounted the floating piston, while at the bottom of the variable area piston rod is connected the piston. Additionally, through holes are provided on the central axes of the variable area piston and the piston; such holes are connected to the bag through an inflation valve and connected with a cover plate at the bottom. On the piston are arranged the check valves I and check valves II. The flange is connected to the inner wall of the shell bottom.