Patents by Inventor Masahiko Maruhashi

Masahiko Maruhashi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Durable percussion pad effective against noise, silent percussion instrument, silent percussion instrument set and electronic percussion system
    Patent number: 7135630
    Abstract: A drum head is broken down into a head body, which in turn is broken down into a solid portion and an accumulating portion, and a rigid base plate; the solid portion offers a beaten surface to a drummer, and the accumulating portion or an array of pillars and the base plate form in combination a locally vibratory portion; when a drummer strikes the beaten surface with a stick, the solid portion caves in for accumulating a part of the impact load, and gives rise to resilient deformation of the pillars beneath the cave so that another part of the impact load is accumulated in the deformed pillars as the elastic strain energy; the elastic strain energy is released through the local vibrations of the pillars, and the vibration energy is transmitted to a small amount of the air therearound so that the noise is faint.
    Type: Grant
    Filed: June 25, 2003
    Date of Patent: November 14, 2006
    Assignee: Yamaha Corporation
    Inventors: Masahiko Maruhashi, Takashi Sando, Motoya Kondoh
  • Durable percussion pad effective against noise, silent percussion instrument, silent percussion instrument set and electronic percussion system
    Publication number: 20040149120
    Abstract: A drum head is broken down into a head body, which in turn is broken down into a solid portion and an accumulating portion, and a rigid base plate; the solid portion offers a beaten surface to a drummer, and the accumulating portion or an array of pillars and the base plate form in combination a locally vibratory portion; when a drummer strikes the beaten surface with a stick, the solid portion caves in for accumulating a part of the impact load, and gives rise to resilient deformation of the pillars beneath the cave so that another part of the impact load is accumulated in the deformed pillars as the elastic strain energy; the elastic strain energy is released through the local vibrations of the pillars, and the vibration energy is transmitted to a small amount of the air therearound so that the noise is faint.
    Type: Application
    Filed: June 25, 2003
    Publication date: August 5, 2004
    Inventors: Masahiko Maruhashi, Takashi Sando, Motoya Kondoh