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US 11,299,687 B2Granted
Guiding member in the form of a metal ring for assembly with friction and with the articulating and/or sliding capability of a shaft
AssigneeH.E.F.
InventorsPatrick Villemagne, Georges Godard
Life of this patent
Estimating the term…
Abstract
The bore of the ring has workings (1a) suitable to act as a grease reserve at the friction area. A self-lubricating coating (3) with low wettability is applied to the entire surface of the said bore, including in the workings (1a) suitable to act as a grease reserve, such that after wearing of the layer of self-lubricating coating at the friction surface of the bore, the difference in wettability between the said friction surface and the workings still having the coating, enables the grease to be drawn out of the said workings in order to lubricate the said friction surface.
Claims12
A guidance device, comprising:
- a metal ring with a bore for assembly with a pin with friction and with a capability for alternating rotation of the pin inside the bore, the bore having a friction surface and workings suitable to act as a grease reserve to the friction surface, at least the friction surface of the bore having a first wettability,
- wherein the friction surface and the workings are provided with a solid layer of self-lubricating coating having a second wettability and being overlaid with grease,
- wherein the second wettability is inferior to the first wettability with respect to the grease, and
- wherein after total wearing of the self-lubricating coating at the friction surface of the bore during alternating rotation of the pin inside the bore, a difference in wettability between the friction surface and the workings still having the solid layer of self-lubricating coating is configured to draw out grease from the workings so as to lubricate the friction surface devoid of the solid layer of self-lubricating coating.
1 more element
Dependencies are inferred from the claim text.