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US 2006/0219504 A1Published application
Vibration damping apparatus
AssigneeWestland Helicopters Limited
InventorsGerald Martyn, Andrew Lord, Rebecca Brodie
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AssigneeWestland Helicopters Limited
InventorsGerald Martyn, Andrew Lord, Rebecca Brodie
Estimating the term…
A damping apparatus for damping vibrations in a vibrating system including a piston which is reciprocally movable in a hydraulic fluid filled damper chamber, piston movement in either direction of movement being resisted by fluid pressure in the damper chamber behind the piston, which resistance provides damping forces which act to oppose piston movement, the piston being connected to one component of the vibrating system and the damping chamber being connected to a second component of the vibrating system, characterised in that the fluid at at least a first side of the piston acts on a movable part which is movable in response to changing fluid pressure in the damper chamber at the first side of the piston as the piston moves, the movable member providing a relief volume for the fluid into which and from which fluid may flow from and towards the first side of the piston without passing to an opposite second side of the piston.
A damping apparatus, for damping vibrations in a vibrating system, including a piston which is reciprocally movable in a hydraulic fluid-filled damper chamber, piston movement in either direction of movement being resisted by fluid pressure in the damper chamber behind the piston, which resistance provides damping forces which act to oppose piston movement, the piston being connected to one component of the vibrating system and the damper chamber being connected to a second component of the vibrating system, characterised in that the fluid at at least a first side of the piston acts on a movable member which is movable in response to changing fluid pressure in the damper chamber at the first side of the piston as the piston moves, the movement of the movable member providing a variable relief volume for the fluid into which and from which fluid may flow from and towards the first side. of the piston without passing to an opposite second side of the piston.
A vibrating system including first and second components, and a damping apparatus including a piston which is reciprocally movable in a hydraulic fluid-filled damper chamber, piston movement in either direction of movement being resisted by fluid pressure in the damper chamber behind the piston, which resistance provides damping forces which act to oppose piston movement, the piston being connected to one component of the vibrating system and the damper chamber being connected to a second component of the vibrating system, characterised in that the fluid at at least a first side of the piston acts on a movable member which is movable in response to changing fluid pressure in the damper chamber at the first side of the piston as the piston moves, the movement of the movable member providing a variable relief volume for the fluid into which and from which fluid may flow from and towards the first side of the piston without passing to an opposite second side of the piston.
A helicopter including a rotor system having at least one damping apparatus connected between a rotor blade of the rotor system and a rotor hub which mounts the rotor blade, the damping apparatus including a piston which is reciprocally movable in a hydraulic fluid-filled damper chamber, piston movement in either direction of movement being resisted by fluid pressure in the damper chamber behind the piston, which resistance provides damping forces which act to oppose piston movement, the piston being connected to one component of the vibrating system and the damper chamber being connected to a second component of the vibrating system, characterised in that the fluid at at least a first side of the piston acts on a movable member which is movable in response to changing fluid pressure in the damper chamber at the first side of the piston as the piston moves, the movement of the movable member providing a variable relief volume for the fluid into which and from which fluid may flow from and towards the first side of the piston without passing to an opposite second side of the piston.
Dependencies are inferred from the claim text.