The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 03, 2022
Filed:
May. 02, 2019
Applicant:
Nivarox-far S.a., Le Locle, CH;
Inventors:
Jonas Vannod, Bienne, CH;
Christian Charbon, Chezard-St-Martin, CH;
Assignee:
Nivarox-FAR S.A., Le Locle, CH;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G04B 1/14 (2006.01);
U.S. Cl.
CPC ...
G04B 1/145 (2013.01);
Abstract
A timepiece mainspring including, in the manufactured state, an eye and a portion formed of coils with an outer coil of radius R, the eye and the portion formed of coils being connected by a neck portion having substantially zero curvature, the timepiece mainspring wherein the neck portion has a length Lcomprised between 1.5 and 10 times, and preferably between 2 and 8 times, the radius R. The mainspring having this specific geometry reduces the risk of premature breakage during use, typically for an application with a k factor lower than 10.