Hydraulic pedal mechanism for pianos

Details Hydraulic pedal mechanism for pianos Hydraulic pedal mechanism for pianos

1994-11-18

1996-05-14

Spyrou, Cassandra C.

Music

Instruments

Stringed

84 21, 84 23, 84 19, G10C 326, G10F 102

Patent

active

055157599

ABSTRACT:
A mechanism for hydraulically actuating a damper assembly in pianos. It includes first, second and third cylinder assemblies interconnected to permit a user to selectively play a piano or use a computer with a suitable interface. The pedal mechanism is coupled to the first cylinder assembly so that the first rod associated with the first piston head moves the hydraulic fluid into the second cylinder assembly which in turn pushes second rod out to release the damper head holding a piano string. Alternatively, the piano can be played with a computer with a solenoid interface that causes the hydraulic fluid inside the third cylinder assembly to go inside the second cylinder assembly or first cylinder assembly causing the same effect as if it was done by activating a pedal. Conduit members connect the different cylinders without causing any incompatibility or interference.

REFERENCES:
patent: 4206677 (1980-06-01), Ramsey
patent: 5016513 (1991-05-01), Stahnke
patent: 5335574 (1994-08-01), Matsunaga et al.

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