Action of upright piano
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Sep 3, 2013
Grant Date -
Jul 19, 2012
app pub date -
Jul 23, 2010
filing date -
Jul 29, 2009
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
To provide an action of an upright piano which permits playing of repeated notes on the single key and touch of the keys that are comparable to a grand piano. A first spring (59) is provided to a pushing-up portion (20) of a jack (18), a first spring rest (71) is provided to a jack stop rail (53), and when a jack tail (19) moves away from a regulating button (47), the first spring (59) bent between the pushing-up portion (20) and the first spring rest (71) forces the pushing-up portion (20) to be pushed under a pushed-up portion (27) to be thrust up of a hammer butt (25). A second spring (66) is provided to a damper stop rail (56), a second spring rest (72) is provided to a hammer shank (33), and the second spring (66) bent between the damper stop rail (56) and the second spring rest (72) stops the rotational movement of a hammer (32) before the hammer (32) that moves rotationally by the force of the first spring (59) strikes a string (90).
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully