Patent ID: 11756513

Abstract:
Elliptical silicone knuckle or roller for grand piano action with customized durometer reading is an elliptical cylinder shaped knuckle or roller for a grand piano hammer assembly with an elliptical cylinder shaped core that is made of silicone thermoset resin material, which can be molded or manufactured at any desired durometer reading of 10-100 units to yield a piano action and hammer assembly for a grand piano with the exact feel of escapement that is desired by any particular pianist. Escapement is the process whereby the jack stops driving the knuckle just before the hammer hits the strings where the hammer travels the last 1 to 2 mm to the strings on its own inertia and without any contact with the jack. Two embodiments of elliptical silicone knuckle or roller are presented: a wide embodiment and a narrow embodiment.