Invention Grant
- Patent Title: Repetition lever of grand piano
- Patent Title (中): 大钢琴的重复杠杆
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Application No.: US10575686Application Date: 2004-10-13
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Publication No.: US07678977B2Publication Date: 2010-03-16
- Inventor: Kenji Yoshisue , Hirotaka Higasa , Tsutomu Kihara
- Applicant: Kenji Yoshisue , Hirotaka Higasa , Tsutomu Kihara
- Applicant Address: JP Shizuoka-ken
- Assignee: Kabushiki Kaisha Kawai Gakki Seisakusho
- Current Assignee: Kabushiki Kaisha Kawai Gakki Seisakusho
- Current Assignee Address: JP Shizuoka-ken
- Agency: Crowell & Moring LLP
- Priority: JP2003-354274 20031014; JP2004-006013 20040113
- International Application: PCT/JP2004/015064 WO 20041013
- International Announcement: WO2005/036521 WO 20050421
- Main IPC: G10C3/00
- IPC: G10C3/00

Abstract:
There is provided a repetition lever for a grand piano, which is excellent in shape retainability and dimensional stability and is light in weight and high in rigidity, thereby enabling required operations to be stably performed and improving the capability of repeated key striking. A repetition lever 4 for a grand piano, which performs the operation of pushing up a hammer 30 after the hammer has struck a string, is formed by a molded article of a thermoplastic resin containing long fibers for reinforcement, the molded article being molded by a long fiber process. The repetition lever 4 has reduced cross-sectional area portions 49, 50, and 54 for reducing weight thereof. The long fibers for reinforcement are carbon fibers, and the thermoplastic resin is an ABS resin.
Public/Granted literature
- US20070012156A1 Repetition lever of grand piano Public/Granted day:2007-01-18
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