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US 2021/0381573 A1Published application
Dynamic load damping apparatus
AssigneeThe Boeing Company
InventorJustin Christenson
Life of this patent
Estimating the term…
Abstract
A dynamic load damping apparatus is employed in a hydraulic steering system control circuit of an aircraft. The dynamic load damping apparatus is positioned in the hydraulic steering system control circuit in parallel with a control valve of the control circuit that functions as the hydraulic fluid source of the control circuit and an actuator that controls movements of a nose gear of the aircraft. The dynamic load damping apparatus dampens loads transmitted to the hydraulic actuator that controls the steering movements of the nose gear on the aircraft.
Claims20
A dynamic load damping apparatus comprising:
- a housing;
- a sleeve in the housing, the sleeve having an interior bore that extends between a first end of the sleeve and a second end of the sleeve, the first end of the sleeve and the second end of the sleeve being at opposite ends of the sleeve;
- a spool valve in the interior bore of the sleeve, the spool valve having a first land at a first end of the spool valve, the first land being adjacent the first end of the sleeve, the spool valve having a second land at a second end of the spool valve, the second land being adjacent the second end of the sleeve;
- a first restricted conduit extending across the first land;
- and,
- a second restricted conduit extending across the second land.
3 more elements
A dynamic load damping apparatus comprising:
- a housing;
- a sleeve in the housing, the sleeve having an interior bore that extends between a first end of the sleeve and a second end of the sleeve, the first end of the sleeve and the second end of the sleeve being at opposite ends of the sleeve, the interior bore having a first portion adjacent the first end of the sleeve, the first portion of the interior bore having a first interior diameter dimension, the interior bore having a second portion adjacent the second end of the sleeve, the second portion of the interior bore having a second interior diameter dimension, the interior bore having a third portion, the third portion of the interior bore being between the first portion of the interior bore and the second portion of the interior bore, the third portion of the interior bore having a third interior diameter dimension, the third interior diameter dimension being larger than the first interior diameter dimension and the second interior diameter dimension;
- a spool valve in the interior bore of the sleeve, the spool valve having a first land at a first end of the spool valve, the first land being adjacent the first end of the sleeve and in the first portion of the interior bore of the sleeve, the spool valve having a second land at a second end of the spool valve, the second land being adjacent the second end of the sleeve and in the second portion of the interior bore of the sleeve;
- a first restricted conduit extending across the first land;
- and,
- a second restricted conduit extending across the second land.
3 more elements
A method of damping dynamic loads in a hydraulic actuator, the method comprising:
- positioning a spool valve in an interior bore of a sleeve between a first end of the interior bore of the sleeve and a second end of the interior bore of the sleeve, the interior bore of the sleeve having a first portion adjacent the first end of the sleeve and a second portion adjacent the second end of the sleeve;
- positioning a first land at a first end of the spool valve adjacent the first end of the sleeve in the first portion of the interior bore of the sleeve;
- positioning a second land at a second end of the spool valve adjacent the second end of the sleeve in the second portion of the interior bore of the sleeve;
- communicating the first portion of the interior bore of the sleeve with an interior bore of an actuator on a first side of a piston in the interior bore of the actuator;
- communicating the second portion of the interior bore of the sleeve with the interior bore of the actuator on a second side of the piston in the interior bore of the actuator;
- extending a first restricted conduit across the first land of the spool valve;
- and,
- extending a second restricted conduit across the second land of the spool valve.
5 more elements
Dependencies are inferred from the claim text.