Nose-wheel type landing gear for aircraft
AssigneeMessier-Hispnao-Bugatti (S.A.)
InventorsJacques Veaux, Michel Derrien
Life of this patent
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Abstract
The landing gear comprises a shock absorber (4) having a rod (6) slidable in a cylinder (6), a wheel (12) linked to the cylinder, a guide sheath (14) surrounding the shock absorber (4), releasably engageable means (17) for fixing the cylinder at least in rotation relative to the guide sheath (14), and a strut (21) surrounding the sheath. When the strut is retracted under the control of an actuator (42) a rod (80) draws the sheath (14) into the strut (21) thereby compacting the landing gear lengthwise, at the same time a helical groove (38) cooperates with a groove follower (40) to turn the sheath, and hence the shock absorber cylinder (6) and the nose wheel (12) so that the wheel lies flat inside the aircraft when retracted.
Claims20
A nose-wheel type landing gear for aircraft, comprising:
- a shock absorber including a rod and a cylinder, said rod being slidable in said cylinder, and having a projecting end connected to a fixed point on the aircraft structure;
- running means connected to the other end of said shock absorber;
- a guide sheath substantially around said shock absorber;
- sliding bearings between the inside wall of said sheath and the outside wall of said cylinder;
- releasably engageable means for connecting said cylinder to said sheath, at least in rotation, when said shock absorber is in a "relaxed" position;
- a strut surrounding said sheath;
- controllable means for exerting a traction force on said sheath to draw said sheath into said strut;
- and
- means for causing said sheath to rotate as it is drawn into said strut.
A nose-wheel type landing gear for aircraft, comprising:
- a shock absorber having a rod and a cylinder, said rod being slidable in said cylinder, and a projecting end of said rod being connected to a fixed point on the aircraft structure;
- running means connected to the other end of said shock absorber a guide sheath substantially around said shock absorber;
- sliding bearings situated between the inside wall of said sheath and the outside wall of said cylinder;
- releasably engageable means for connecting said cylinder to said sheath, at least in rotation, when said shock absorber is in a "relaxed" position;
- a strut surrounding said sheath;
- controllable means for exerting a traction force on said sheath to draw said sheath into said strut;
- and
- means for controlling rotation of said sheath as it enters said strut including at least one helical groove extending over a given angle of rotation and over a predetermined height h and groove-following means fixed to said guide sheath, said groove-following means running along said groove as said sheath is moved in translation into said strut to cause said sheath to rotate relative to the strut.
Dependencies are inferred from the claim text.