Invention Grant
- Patent Title: Stator, movement, timepiece, method for manufacturing movement and method for manufacturing stator
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Application No.: US17022918Application Date: 2020-09-16
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Publication No.: US11929640B2Publication Date: 2024-03-12
- Inventor: Kosuke Yamamoto , Shinji Kinoshita , Hitoshi Takeuchi , Tatsuya Omura
- Applicant: Seiko Instruments Inc.
- Applicant Address: JP Chiba
- Assignee: SEIKO INSTRUMENTS INC.
- Current Assignee: SEIKO INSTRUMENTS INC.
- Current Assignee Address: JP Chiba
- Agency: Crowell & Moring LLP
- Priority: JP 19172905 2019.09.24
- Main IPC: H02K1/14
- IPC: H02K1/14 ; G04C3/14 ; H02K15/02 ; H02K37/16 ; G04C3/12
Abstract:
A stator includes a magnetic plate material that has a main plate surface that is a surface to face a main plate of a movement when assembled to the main plate and that has a rotor accommodating hole formed in a part thereof; and a non-magnetic region that is made non-magnetic by applying chromium on the main plate surface around the rotor accommodating hole and irradiating the chromium with a laser from the main plate surface side.
Public/Granted literature
- US20210091607A1 STATOR, MOVEMENT, TIMEPIECE, METHOD FOR MANUFACTURING MOVEMENT AND METHOD FOR MANUFACTURING STATOR Public/Granted day:2021-03-25
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