公开(公告)号：US11829107B2

公开(公告)日：2023-11-28

申请号：US16968056

申请日：2019-02-04

Applicant: PATEK PHILIPPE SA GENEVE

Inventor： Julien Perret ,  Rémy Fournier ,  Sylvain Jeanneret

IPC: G04B15/14 ,  G04B15/08 ,  G04D3/00

CPC classification number: G04B15/14 ,  G04B15/08 ,  G04D3/0069

Abstract: The micromechanical clockwork part is cut from a plate-like silicon substrate. The cut edges of the part include portions intended to serve as contact surfaces arranged to slide against corresponding contact zones of another micromechanical part in a clockwork piece. The cut edges have a ribbed surface including an alternating set of ribs and furrows, the ribs and the furrows being straight and each contained in a plane parallel to the plate. Moreover, the ribs and furrows which the cut edges have form a stepped pattern on the cut edge, with first intervals in which the spacing separating the ribs from one another is equal to a first distance, and at least one second interval in which the spacing between the ribs is equal to a second distance different from the first distance.

公开(公告)号：US11927919B2

公开(公告)日：2024-03-12

申请号：US17624962

申请日：2020-07-10

Applicant: PATEK PHILIPPE SA GENEVE

Inventor： Julien Perret

IPC: G04B31/08 ,  C10M105/76 ,  C10N30/06 ,  C10N40/06 ,  C10N50/00 ,  G04B15/14

CPC classification number: G04B31/08 ,  C10M105/76 ,  G04B15/14 ,  C10M2227/04 ,  C10N2030/06 ,  C10N2040/06 ,  C10N2050/023

Abstract: Disclosed is a timepiece assembly including at least two elements in contact and mobile relative to each other, one of the elements having at least a first contact surface intended to rub against at least a second contact surface of the other element under dry lubrication conditions. At least one of the first and second contact surfaces is covered with a hydrophobic coating having an angle of contact with water greater than 90°, preferably greater than 100° and preferably greater than 110°, and a coefficient of friction lower than 0.15, preferably lower than 0.12 and preferably lower than 0.1, the variation in the coefficient of friction as a function of the relative humidity being lower than 25%, preferably lower than 10% and preferably lower than 5%.