Invention Grant
- Patent Title: Escapement for timepiece
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Application No.: US15754103Application Date: 2016-08-02
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Publication No.: US10534319B2Publication Date: 2020-01-14
- Inventor: Tadahiro Fukuda , Shinpei Fukaya
- Applicant: CITIZEN WATCH CO., LTD.
- Applicant Address: JP Tokyo
- Assignee: CITIZEN WATCH CO., LTD.
- Current Assignee: CITIZEN WATCH CO., LTD.
- Current Assignee Address: JP Tokyo
- Agency: Knobbe, Martens, Olson & Bear LLP
- Priority: JP2015-165649 20150825; JP2015-230669 20151126
- International Application: PCT/JP2016/072686 WO 20160802
- International Announcement: WO2017/033688 WO 20170302
- Main IPC: G04B15/14
- IPC: G04B15/14

Abstract:
An escapement for a timepiece includes an escape wheel that rotates about a shaft center and a pallet that oscillates. The escape wheel includes fifteen teeth. The pallet includes an entry pallet jewel and an exit pallet jewel that switch the rotation and stop of the escape wheel and receive torque from the escape wheel by contacting the teeth. The escape wheel and a balance (an impulse pin) apply and receive torque only via the pallet. The pallet includes a third pallet jewel (a torque applying and receiving member) that receives torque from a convex portion of the escape wheel in addition to the entry pallet jewel and the exit pallet jewel.
Public/Granted literature
- US20180231936A1 ESCAPEMENT FOR TIMEPIECE Public/Granted day:2018-08-16
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