Escapement wheel, tool for manufacturing an escapement wheel and method for manufacturing an escapement wheel

Patent metadata

Field	Value
Publication number	US-11829110-B2
Application number	US-202217682583-A
Country	US
Kind code	B2
Filing date	Feb 28, 2022
Priority date	Jul 2, 2021
Publication date	Nov 28, 2023
Grant date	Nov 28, 2023

Abstract

A method for manufacturing an escapement wheel (10) including steps of creating an escapement wheel ébauche having a hub (11) connected to a felloe (12) by radial arms (13), and teeth (14) regularly distributed around the periphery of the felloe (12), and simultaneously machining a reduction of cross-section of the free end of each tooth (14), by a cutting tool (20) aligned coaxially with the escapement wheel ébauche.

First claim

The invention claimed is:

1. A method for manufacturing an escapement wheel, comprising steps of:
creating an escapement wheel ébauche comprising a hub connected to a felloe by radial arms, and teeth regularly distributed around the periphery of the felloe; and
simultaneous machining of a reduction of cross-section of the free end of each tooth, by a cutting tool aligned coaxially with the escapement wheel ébauche.

2. The method according to claim 1 , wherein the reduction of cross-section is formed by a reduced end portion including a bevel.

3. The method according to claim 2 , wherein the reduction of cross-section is formed by a reduced end portion including a flat surface parallel to a plane in which the escapement wheel ébauche is inscribed.

4. The method according to claim 1 , wherein the reduction of cross-section machined includes a reduced end portion having the shape of a surface of revolution orthogonal to a plane in which the escapement wheel ébauche is inscribed.

5. The method according to claim 1 , wherein the step of creating the ébauche of an escapement wheel is carried out by a LIGA method.

6. The method according to claim 1 , wherein the machining step is carried out by milling.

7. The method according to claim 1 , wherein the machining step includes the successive operations of:
positioning the cutting tool so that its axis of rotation is the same as the axis of rotation of the escapement wheel ébauche;
guiding the cutting tool in translation towards the escapement wheel ébauche according to a direction coaxial to the axis of rotation of the escapement wheel ébauche, and blanking a part of the end of each tooth of the escapement wheel ébauche so as to generate a reduced end portion, in a single cutting operation; and
removing the tool.

Assignees

• Nivarox Far Sa

Inventors

• Billod-Laillet Antoine
• Haefeli Frédéric
• Verardo Marco

Classifications

• G04D3/0033 Primary

  for lever wheels · CPC title

• B23F21/12

  Milling tools · CPC title

• G04B15/14 Primary

  Component parts or constructional details, e.g. construction of the lever or the escape wheel {(assembly and manufacture of the spring G04B1/145; assembly and manufacture of components, e.g. pinions, spindles G04B13/02; lubrication of clockwork bearings G04B31/008; oils for clockwork bearings in general G04B31/08)} · CPC title

• B23F1/06 Primary

  by milling · CPC title

• G04D3/0087 Primary

  for components of the escapement mechanism, e.g. lever escapement, escape wheel · CPC title