Back to results
US 4,641,565 AGranted
Upright piano
AssigneeNippon Gakki Seizo Kabushiki Kaisha
InventorsHiroki Tachida, Takane Sato, Shigeaki Sato
Life of this patent
Estimating the term…
Abstract
In construction of a keyboard unit accommodable upright piano, a vertically turnable keyboard is held by a holder unit so that the keyboard unit can be stably held in a horizontal position at one state of the holder unit and easily be accommodated in the main casing at the other state of the holder unit.
Claims9
An improved upright piano, comprising:
- a substantially box-type main casing,
- a plate arranged substantially vertically along the rear side of said main body,
- a keyboard unit pivoted at its rear end to said main casing in a vertically turnable arrangement, and
- a holder unit including elongated stays, each of which is pivoted, at one end, to the bottom of said keyboard unit in a vertically turntable arrangement and detachably engaged, at the other end, in a seat mounted on the lower portion of said plate,
- whereby said keyboard unit is held substantially horizontally when said stay is engaged in said seat, said keyboard, said stay and said seat thereby coupled in a triangular support arrangement, and
- whereby said keyboard unit is fully accommodated in a lower space in said main casing when said stay is disengaged from said seat.
3 more elements
Dependencies are inferred from the claim text.