Patent ID: 7279627
Filing Date: 2007-10-09
Classification: G10C

Abstract:
1. An action for a piano, configured to actuate in response to a depression on a key to swing a hammer which strikes a string, said action comprising: a wippen pushed up by said key when said key is depressed to pivotally move upward; a regulating button having a flat jack contact surface on a lower end, and fixed to a predetermined position above said wippen; and a jack having a regulating button contact protrusion including a flat regulating button contact surface on an upper end, wherein said regulating button contact surface with respect to the contact protrusion is angled such that said regulating button contact surface comes entirely into planar contact with said jack contact surface, and arranged on said wippen for pivotal movement about a jack fulcrum to engage with said hammer such that a pivotal movement of said wippen causes said jack to push up said hammer, and said jack being configured to pivotally move relative to said wippen to come off said hammer by said regulating button contact surface coming into contact with said jack contact surface during the pivotal movement.