Action Frames Patents (Class 84/250)
  • LOW INERTIA GRAND PIANO PIANO ACTION
    Publication number: 20090007750
    Abstract: Composite or plastic molded articles used in a grand piano piano action. The articles make up a piano action with less dynamic mass which is, thus, more responsive to the piano player. In addition, the new action provides the extremely valuable collateral benefits of increased efficiency of manufacture and maintenance.
    Type: Application
    Filed: December 26, 2007
    Publication date: January 8, 2009
    Inventors: Bruce E. Clark, Kevin Burke, Kirk Burgett
  • Action-supporting arrangement in piano
    Patent number: 4821618
    Abstract: The action mechanism of a piano is supported directly from a back structure of the piano and is adjustable relative to strings of the piano prior to assembly of the complete piano, the supports for the action mechanism being attached directly to back posts of the back structure, which act to absorb noises created in the action mechanism and inhibit the transmission of vibrations and noises produced in the action mechanism to the strings and soundboard of the piano.
    Type: Grant
    Filed: October 23, 1987
    Date of Patent: April 18, 1989
    Assignee: Kabushiki Kaisha Kawai Gakki Seisakusho
    Inventor: Shinsaku Koizumi