Horological rivet

Patent metadata

Field	Value
Publication number	US-10732572-B2
Application number	US-201615071605-A
Country	US
Kind code	B2
Filing date	Mar 16, 2016
Priority date	Mar 17, 2015
Publication date	Aug 4, 2020
Grant date	Aug 4, 2020

Abstract

A rivet ( 1 ), in particular a horological rivet, comprising:
a longitudinal axis ( 10 ); a first part ( 20 ), in particular a head ( 50 ); a second part ( 30 ), in particular a body ( 60 ),

the first part comprising a first handling element ( 1 a ) that is able to mechanically stress the first part, and the second part comprising a second handling element ( 1 b ) that is able to mechanically stress the second part, the first and second handling elements being such that they make it possible to apply mechanical actions to the first and the second part, respectively, that cause the first and second parts of the rivet to break, notably to shear.

First claim

The invention claimed is:

1. A rivet, comprising:
a rivet body having a longitudinal axis;
a first part comprising a head of the rivet having a first dimension transverse to the longitudinal axis, and projecting radially from the rivet body;
a second part comprising a plastically deformable portion of the rivet having a second dimension transverse to the longitudinal axis and smaller than the first transverse dimension before deformation, and adapted to be deformed to have a third dimension transverse to the longitudinal axis and larger than the second transverse dimension, so as to form a rivet seam projecting radially from the rivet body,
the first part being connected to the second part by a breakage zone,
the first part comprising a first handling element that is able to mechanically stress the first part, and the second part comprising a second handling element that is able to mechanically stress the second part, the first handling element and the second handling element being so that the first handling element and second handling element make it possible to apply mechanical actions to the first part and the second part, respectively, that cause the first part and the second part of the rivet to break at the breakage zone,
wherein
(i) the first handling element comprises a first hollow shaped portion, wherein the first hollow shape has a noncircular section in a plane perpendicular to the longitudinal axis,
(ii) the second handling element comprises a second hollow shaped portion, wherein the second hollow shape has a noncircular section in a plane perpendicular to the longitudinal axis, and
(iii) the first hollow shaped portion and the second hollow shaped portion are arranged in continuation of one another so as to form one single hollow shaped portion.

2. The rivet as claimed in claim 1 , wherein at least one of (i) the first handling element is oriented along the longitudinal axis and (ii) the second handling element is oriented along the longitudinal axis.

3. The rivet as claimed in claim 1 , wherein the first handling element and second handling element are disposed coaxially with the longitudinal axis.

4. The rivet as claimed in claim 1 , wherein the first part and the second part are separated by a region of lower mechanical strength that is oriented substantially perpendicularly to the longitudinal axis and is situated at an interface of the first part and the second part.

5. The rivet as claimed in claim 4 , wherein the region of lower mechanical strength comprises a groove.

6. The rivet as claimed in claim 5 , wherein at least one of (i) the groove comprises a bottom diameter less than 0.9 times a maximum diameter of the second part, (ii) the groove has a bottom width, measured along the longitudinal axis, of between 0.03 mm and 0.07 mm, and (iii) one or more sidewalls of the groove have or form a chamfer extending from the bottom of the groove to an outside of the groove.

7. The rivet as claimed in claim 5 , wherein at least one of (i) the groove comprises a bottom diameter less than 0.85 times the maximum diameter of the second part, (ii) the groove has a bottom width, measured along the longitudinal axis, of 0.05 mm, and (iii) one or more sidewalls of the groove has/have or form(s) a chamfer having an angle (a) of 45° or 60°, and extending from the bottom of the groove to the outside of the groove.

8. The rivet as claimed in claim 4 , wherein the region separating the first and second parts is a region of lower mechanical shear strength.

9. The rivet as claimed in claim 4 , wherein the region of lower mechanical strength comprises an annular groove.

10. The rivet as claimed in claim 1 , wherein said rivet comprises a radial projection or a post or an eccentric or a wheel or a pinion.

11. A timepiece mechanism comprising a rivet as claimed in claim 1 .

12. A timepiece movement comprising a rivet as claimed in claim 1 .

13. A timepiece, comprising a rivet as claimed in claim 1 .

14. A tool, for removing a rivet as claimed in claim 1 , the tool comprising a shaped portion that is intended to be fitted in a handling element of the rivet.

15. A method for removing an assembly including a rivet as claimed in claim 1 , comprising:
taking hold of the first part of the rivet,
taking hold of the second part of the rivet,
exerting mechanical stress of the first part on the second part, so as to break the first part and the second part of the rivet.

16. The rivet as claimed in claim 1 , wherein the first hollow shaped portion has a polygonal section.

17. The rivet as claimed in claim 1 , wherein the second hollow shaped portion has a polygonal section.

18. The rivet as claimed in claim 1 , wherein the first and second hollow shapes are simultaneously accessible by respective tools.

19. The rivet as claimed in claim 1 , wherein the first and second hollow shapes open on opposite sides of the breakage zone of the rivet.

20. The rivet as claimed in claim 1 , wherein the first and second hollow shapes form a through-cutout which passes entirely through the rivet in a longitudinal manner.

21. The rivet as claimed in claim 1 , wherein the first and second hollow shapes have a same contour in a plane transverse to the longitudinal axis.

Assignees

• Rolex Sa

Inventors

• Humair Hervé
• Jobard Matthieu
• Nicolet Adrien

Classifications

• G04G17/02 Primary

  Component assemblies · CPC title

• G04B29/04

  Connecting or supporting parts · CPC title

• G04B31/00

  Bearings; Point suspensions or counter-point suspensions; Pivot bearings; Single parts therefor (bearings in general F16C {; manufacture and composition of springs G04B1/145; suspension of oscillating weights G04B5/18; suspension of a pendulum G04B17/02; bearings for electrical measurement apparatus G01R1/10, G01R1/12, G01R11/12, G01R11/14; inserting jewels A44C17/04; inserting cutting diamonds B23P5/00; devices for fixation of bearing jewels, bearing sleeves, or the like G04D3/04}) · CPC title

• G04B31/06 Primary

  Manufacture or mounting processes · CPC title

• B21J15/50

  Removing or cutting devices for rivets · CPC title