An encapsulated shock absorber of an aircraft undercarriage includes a sliding rod slidably mounted in a leg strut of the undercarriage and an inner cylinder extending inside the strut. The inner cylinder is fastened to the strut via a top end, and the rod slides around the inner cylinder. The inner cylinder is terminated inside the sliding rod by a diaphragm that defines an oil chamber in the shock absorber and inside the sliding rod. A mixed oil/gas chamber is located in the inner cylinder, and an expansion chamber extends between the sliding rod and the inner cylinder. A hole being made in the inner cylinder in register with the expansion chamber is connected by a pipe to a pressure sensor situated outside the strut. The pipe extends inside the inner cylinder from the hole to the top end of the inner cylinder.

A damper assembly includes an outer cylinder, an inner cylinder positioned at least partially within the outer cylinder, a plunger positioned at least partially within the inner cylinder and coupled to a rod, an aperture extending through the rod, an annular piston coupled to the inner cylinder, and a valve assembly. The rod is positioned at least partially within the inner cylinder and has an outer dimension that is smaller than an inner dimension of the inner cylinder. The plunger and an interior of the inner cylinder at least partially define a first chamber. The valve assembly is in fluid communication with the first chamber and a second chamber. The annular piston extends between the inner cylinder and the outer cylinder, and the annular piston, an exterior surface of the inner cylinder, and the outer cylinder at least partially define the second chamber.

Shock absorber having a main sheath and a main piston sliding inside the main sheath in a sliding direction (X-X), the main piston including a main rod coming out of the main sheath and a main head contained inside the main sheath, the main sheath being filled with hydraulic fluid, a secondary sheath fluidically connected to the main sheath and provided with at least one damping valve, where the secondary sheath is connected to the main sheath by a first and a second passage placed at opposite ends to the main head of the main piston, along the sliding direction (X-X), the secondary sheath including a control valve movable, according to a regulation stroke, between an unlocking position, in which it does not interfere with the first and second passages, and a blocking position, where it occludes the first and second passages so as to realize a selective two-way block.

A shock absorber is provided having a cylinder, a piston rod, a piston body, and a valve. The cylinder is configured to receive fluid. The piston body is connected to the piston rod and is configured to reciprocate within the cylinder between a compression chamber and a rebound chamber. The valve is provided by the piston body having a fluid flow port, a valve seat, a circumferential valving element, and a spring configured to urge the valve body into the valve seat. A primary damping valve and an auxiliary damping valve are also provided.

A method and apparatus for a damper. The damper comprises a fluid chamber having a piston dividing the chamber into a compression and rebound sides, a reservoir in fluid communication with the compression side of the chamber, and an isolator disposed between the compression side and the reservoir, whereby the isolator obstructs fluid flow between the compression side and the reservoir. In one embodiment, a bypass provides a fluid path between the compression side and the isolator.

Disclosed herein is a shock absorber comprising a cylinder, a rod, a main damping piston, the main damping piston coupled to the rod and configured for operation within the cylinder, the main damping piston configured to divide the cylinder into a compression side and a rebound side, a body cap disposed at one end of the cylinder, wherein the body cap has a second inner diameter greater than an inner diameter of the cylinder, an internal floating piston disposed within the body cap, configured to divide the body cap into a first side and a second side, and a base valve piston disposed to separate the compression side from the first side.

A damper assembly comprises a monotube damper and a twintube damper in a telescopic configuration. A first piston is connected to a rod and is slidably disposed within a first tube. A second tube and a third tube are each disposed coaxially around the monotube damper, with the third tube disposed within the second tube and defining an annular chamber therebetween. A second piston is connected to an axial end of the first tube dividing an interior of the third tube into an upper chamber and a lower chamber. The second piston defines a twintube passage providing fluid communication therethrough. A base member defines a base passage providing fluid communication between the lower chamber and the annular chamber. A seal selectively blocks fluid flow through the twintube passage or the base passage and based on an axial position of the first tube relative to the second tube.

A speed retarding device for a rotary nozzle includes a hollow cylindrical housing and a rotatable tubular shaft rotatably carried by the housing. The shaft has a central axial bore and an enlarged drag sleeve portion carried in the housing. A pair of support bearings support the drag sleeve portion of the shaft in the housing. An annular inner seal between each of the support bearings and the drag sleeve portion defines a cavity within the housing receiving a viscous fluid confined within the cavity. The drag sleeve portion includes a peripheral helical groove and a plurality of axial bores extending therethrough parallel to the central bore, one or more blind axial bores each having a closed end an open end, and a piston disposed in each of the one or more blind axial bores each defining an air space between the closed end and the piston.

The invention relates to a vibration damper for a motor vehicle comprising an inner tube, an outer tube and at least one compensating chamber, which is formed between the inner tube and the outer tube and comprises at least one gas bag, which is arranged in the compensating chamber, wherein the compensating chamber is fluidically connected to at least one working area of the inner tube filled with a hydraulic fluid, wherein at least one guide element is provided, which deflects a flow of the hydraulic fluid during a rebound stage or a compression stage in such a way that the gas bag is indirectly subjected to flow. Furthermore, the invention relates to a motor vehicle.

A system for servicing a shock strut may comprise a system controller and a tangible, non-transitory memory configured to communicate with the system controller. The tangible, non-transitory memory may have instructions stored thereon that, in response to execution by the system controller, cause the system controller to perform operations, which may comprise: receiving, by the system controller, a hydraulic fluid volume difference or a pressurized gas volume difference from a ground support controller; determining, by the system controller, a desired fluid flow rate based on the hydraulic fluid volume difference or the pressurized gas volume difference; and outputting, by the system controller, a desired fluid flow rate signal corresponding to the desired fluid flow rate to at least one of a hydraulic fluid flow controller or a pressurized gas flow controller.