Metering needle for oleo-pneumatic-type shock absorber
AssigneeSafran Landing Systems
InventorsSylvain Leclercq, Mathieu Joubert, Franck Lecuyer, Quentin Roirand
Life of this patent
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Abstract
A metering needle for an oleo-pneumatic-type shock absorber includes a base made of thermoplastic material, from which projects a rod arranged to control the flow of a hydraulic fluid through an orifice. The base has an arched bottom for withstanding pressure forces, in which is mounted an insert arranged to mechanically reinforce the arched bottom and distribute the pressure forces evenly.
Claims7
An oleo-pneumatic shock absorber comprising a metering needle, a diaphragm holder tube and a diaphragm held by the diaphragm holder tube, the metering needle comprising a base made of thermoplastic material from which projects a rod arranged to control a flow of a hydraulic fluid through an orifice of the diaphragm, the base having a bottom delimiting an external face of the metering needle and forming an axisymmetrical arch with convexity rotated towards a free end of the rod to withstand pressure forces and in which is inserted and fastened an insert arranged to mechanically reinforce the arched bottom and distribute the pressure forces evenly
- wherein the insert is a cylindrical bush housed in the arched bottom of the base, and the cylindrical bush is press-fitted on an injection sprue of the base.
Dependencies are inferred from the claim text.