Patent ID: 7057101

Claim:
An action of a piano capable of being switched between a normal performance mode and a silent performance mode, the action comprising: a hammer operating portion for swinging a hammer to strike a string upon key depression; and a transmission switching device for switching hammer operating portion between normal performance mode and silent performance mode, wherein the hammer operating portion being operated to strike the string in the normal performance mode upon key depression, and the hammer operating portion not being operated in the silent performance mode upon key depression, and a load switching device for providing weighted load for keys, comprising a weight lever comprising a first end and a second end; wherein one of the first and second ends is pivotably connected above the key, wherein the other of the first and second ends is arranged and constructed to abut upon a top surface of the key, said weight lever contacts the top surface of the key upon selection of silent performance mode, wherein said weight lever is capable of inertial motion independently of the key to duplicate hammer throw, effect of said weight lever to the key is reduced during normal performance mode.