Patent · US Active

Hairspring for a balance wheel/hairspring resonator

US8002460B2 · kind B2 · utility

16Cited by

8References

16Claims

0Family size

Assignee

ROLEX SA · CH

Inventors

Jerome Daout · Rolle, CH
Richard Bossart · Lausanne, CH

Key dates

Filing date	Jul 29, 2009
Grant date	Aug 23, 2011
Priority date	—
Expiry date	Jul 29, 2029

Classification

Technology area (CPC G)Physics
CPC primaryG04B17/20
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

Hairspring for a balance wheel/hairspring resonator, comprising n blades, where n≧2, which are fastened via at least one of their respective homologous ends and wound in spirals with an angular offset capable of neutralizing the lateral forces liable to be exerted on its central arbor when one of the ends of each blade is moved angularly around said central arbor relative to its other end.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.