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US 9,403,592 B2Granted
Two-stage secondary piston for landing gear
AssigneeGoodrich Corporation
InventorJeremy Daniel Kallio
Life of this patent
Estimating the term…
Abstract
A shock strut is disclosed. The shock strut may have multiple pistons and multiple chambers. In this manner, the shock strut may compress different lengths for different applied forces at different points during its stroke.
Claims11
A shock strut comprising:
- a cylinder;
- and
- a piston assembly disposed radially inward of the cylinder and configured to travel axially within the cylinder in response to the shock strut being in at least one of a first stage region, a transition region or a secondary stage region,
- wherein the piston assembly comprises:
- an outer secondary piston configured to travel axially inward in response to the shock strut being in at least one of the transition region and the secondary stage region;
- and
- an inner secondary piston configured to travel axially inward in response to the shock strut being in the secondary stage region,
- a primary chamber in fluidic communication with an orifice, wherein the primary chamber and the orifice are configured to dampen compressive loads on the shock strut;
- an engagement strike plate comprising an annulus disposed annularly around an outer periphery of the inner secondary piston and axially outward of the outer secondary piston relative to the cylinder;
- a gas spring chamber metering pin;
- and
- a floor strike plate,
- wherein the floor strike plate comprises an annulus disposed annularly around an outer periphery of the inner secondary piston and axially inward of the outer secondary piston relative to the cylinder.
10 more elements
A method of operating a shock strut comprising:
- applying a first compression force to a primary piston;
- compressing the shock strut wherein the compressing includes translating the primary piston axially inward relative to a cylinder;
- transferring the first compression force to a fluid disposed within a primary chamber;
- expelling the fluid from an orifice in response to the transferring;
- contacting an engagement strike plate by the primary piston,
- wherein the engagement strike plate comprises an annulus disposed annularly around an outer periphery of an inner secondary piston and axially outward of an outer secondary piston relative to the cylinder;
- translating the engagement strike plate axially inward relative to the cylinder in response to the contacting the engagement strike plate by the primary piston;
- translating the outer secondary piston axially inward relative to the cylinder in response to the translating the engagement strike plate;
- translating a floor strike plate in response to the translating the outer secondary piston;
- and
- contacting the inner secondary piston by the floor strike plate.
8 more elements
Dependencies are inferred from the claim text.