Keyboard instrument
US-2020126527-A1 · Apr 23, 2020 · US
Hammer device for keyboard instrument
US12475865B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12475865-B2 |
| Application number | US-202318473062-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 22, 2023 |
| Priority date | Sep 30, 2022 |
| Publication date | Nov 18, 2025 |
| Grant date | Nov 18, 2025 |
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- Title
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- Abstract
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- First independent claim
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Abstract
Official abstract text for this publication.
A hammer device for a keyboard instrument includes a plurality of hammers. Each hammer has a hammer body extending in a front-rear direction and having a front half thereof pivotally supported and a rear half thereof formed with a weight mounting portion. A first weight common in shape and size to the hammers is attached to one of left and right side surfaces of the weight mounting portion. A second weight is attached to the other of the left and right side surfaces of the weight mounting portion. The first weight includes a stopper contact portion which protrudes at least either more upward or more downward than the second weight, and is brought into contact with a stopper in accordance with pivotal movement of the hammer caused by depression of a key associated therewith.
First claim
Opening claim text (preview).
What is claimed is: 1 . A hammer device for a keyboard instrument, which includes a plurality of hammers each provided in association with an associated one of a plurality of keys, and in which each of the hammers is pivotally moved in interlock with depression of the associated key to thereby add a touch weight to the key, wherein each of the plurality of hammers comprises: a hammer body extending in a front-rear direction, the hammer body having a front half thereof pivotally supported and a rear half thereof formed with a weight mounting portion; a first weight extending in the front-rear direction, the first weight being formed common in shape and size to the plurality of hammers, and attached to one of left and right side surfaces of the weight mounting portion; and a second weight extending in the front-rear direction and attached to the other of the left and right side surfaces of the weight mounting portion, wherein the first weight includes a stopper contact portion protruding at least either more upward than an upper surface of the second weight or more downward than the second weight, for being brought into contact with a stopper in accordance with pivotal movement of the hammer caused by depression of the key associated therewith. 2 . The hammer device according to claim 1 , wherein the second weight has a length dimension in the front-rear direction set according to a touch weight required for the associated key.
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Frequently asked questions
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- What does patent US12475865B2 cover?
- A hammer device for a keyboard instrument includes a plurality of hammers. Each hammer has a hammer body extending in a front-rear direction and having a front half thereof pivotally supported and a rear half thereof formed with a weight mounting portion. A first weight common in shape and size to the hammers is attached to one of left and right side surfaces of the weight mounting portion. A s…
- Who is the assignee on this patent?
- Kk Kawai Gakki Seisakusho
- What technology area does this patent fall under?
- Primary CPC classification G10C3/18. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Nov 18 2025 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).