Damper for generating damping force variable in dependence on an

Details Damper for generating damping force variable in dependence on an Damper for generating damping force variable in dependence on an

1997-05-21

1999-07-06

Shoop, Jr., William M.

Music

Instruments

Stringed

G10C 302

Patent

active

059200197

ABSTRACT:
An upright piano has a fall board for covering a keyboard, and a damper assembly is provided between a side arm and the fall board; the damper assembly includes a rotary damper generating large damping force during a turning motion in the counter clock wise direction and small damping force during the opposite turning motion and a link mechanism connected between the fall board and a shaft member of the rotary damper for changing the turning motion on the way between the closed position and the open position of the fall board; and a player is not expected to strongly support the fall board so as to prevent the fall board and the piano case from violent collision therebetween.

REFERENCES:
patent: 5056396 (1991-10-01), Furukawa

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