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:
Nov. 05, 2013
Filed:
Aug. 18, 2011
Applicant:
Serge Nicoud, Le Landeron, CH;
Inventor:
Serge Nicoud, Le Landeron, CH;
Assignee:
ETA SA Manufacture Horlogère Suisse, Grenchen, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G04B 1/16 (2006.01); G04B 1/18 (2006.01); G04B 5/02 (2006.01); B04B 5/02 (2006.01);
U.S. Cl.
CPC ...
G04B 1/16 (2013.01); G04B 1/18 (2013.01); B04B 5/02 (2013.01);
Abstract
Barrel for a self-winding timepiece including a drum of axis AA provided with an internal lateral wall having friction surfaces alternating with locking structures forming salient or inward edges at the boundary of the friction surfaces and a mainspring forming a winding including an outer coil, which is friction coupled to said internal lateral wall and free to slip against said internal lateral wall in the event of overwinding of the mainspring, characterized in that said friction surfaces are demarcated, downstream relative to the direction in which said outer coil slips, by a rounded salient edge or an inward edge.