Wristwatch gear and method for manufacturing wristwatch gear

Details Wristwatch gear and method for manufacturing wristwatch gear Wristwatch gear and method for manufacturing wristwatch gear

2009-01-16

2010-12-21

Miska, Vit W (Department: 2833)

Horology: time measuring systems or devices

Arbor and pinion details

C368S323000

Reexamination Certificate

active

07854546

ABSTRACT:
The center wheel and pinion has a center shaft provided with a center pinion that is formed from a crystalline metal, and a center tooth part composed of a metallic glass alloy that is integrally formed with the center shaft. The center shaft has a center pinion and other external peripheral regions that are formed by cutting the external periphery of a cylindrical member provided with a support hole. The external periphery of the coupling part to which the center tooth part is coupled is formed in a quadrangular shape. The center tooth part composed of a metallic glass alloy has a tooth continuously formed at the disc-shaped external periphery, and a center position that is integrally formed surrounding the entire external periphery of the quadrangular-shaped coupling part of the center shaft.

REFERENCES:
patent: 4186245 (1980-01-01), Gilman
patent: 4202089 (1980-05-01), Ljung
patent: 4813292 (1989-03-01), Boyko
patent: 2002-323114 (2002-11-01), None
patent: 2008-6447 (2008-01-01), None

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