Timepiece escapement mechanism without lubrication
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United States of America Patent
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Apr 4, 2017
Grant Date -
Nov 12, 2015
app pub date -
Apr 22, 2015
filing date -
May 8, 2014
priority date (Note) -
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Abstract
A timepiece escapement mechanism with improved tribology includes at least one pair of components including a first component and a second component respectively including a first friction surface and a second friction surface which are arranged to cooperate in contact with each other. The second friction surface includes at least one silicon-based material taken from a group including silicon, silicon dioxide, amorphous silicon, polycrystalline silicon, porous silicon, or a mixture of silicon and silicon oxide. The first friction surface is formed by a surface of a solid element which is made of solid silicon nitride in a stoichiometric formulation Si3N4. A method for making the escapement mechanism is also provided.
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