Patents by Inventor Hiroyasu Asakawa

Hiroyasu Asakawa 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).

  • Publication number: 20160059552
    Abstract: An inclined plane which inclines toward a lower plane of a ceiling portion, that is, the lower plane of a communication substrate from a ceiling plane of a second liquid chamber is formed in the second liquid chamber of the communication substrate. Therefore, an individual communication opening is formed, in a state of penetrating the communication substrate from the inclined plane. One end (lower end) of the individual communication opening communicates with the second liquid chamber by being open onto the inclined plane, and the other end (upper end) of the individual communication opening individually communicates with a pressure chamber of a pressure chamber forming substrate by being open onto an upper plane of the communication substrate. When a thickness of the communication substrate is referred to as T, a length of the individual communication opening is referred to as L, and a substantial depth of the second liquid chamber is referred to as D, the dimensions are configured so as to be L+D>T.
    Type: Application
    Filed: August 28, 2015
    Publication date: March 3, 2016
    Inventors: Motoki TAKABE, Koji ASADA, Hidemichi FURIHATA, Hiroyasu ASAKAWA
  • Patent number: 9254657
    Abstract: An inclined plane which inclines toward a lower plane of a ceiling portion, that is, the lower plane of a communication substrate from a ceiling plane of a second liquid chamber is formed in the second liquid chamber of the communication substrate. Therefore, an individual communication opening is formed, in a state of penetrating the communication substrate from the inclined plane. One end (lower end) of the individual communication opening communicates with the second liquid chamber by being open onto the inclined plane, and the other end (upper end) of the individual communication opening individually communicates with a pressure chamber of a pressure chamber forming substrate by being open onto an upper plane of the communication substrate. When a thickness of the communication substrate is referred to as T, a length of the individual communication opening is referred to as L, and a substantial depth of the second liquid chamber is referred to as D, the dimensions are configured so as to be L+D>T.
    Type: Grant
    Filed: August 28, 2015
    Date of Patent: February 9, 2016
    Assignee: Seiko Epson Corporation
    Inventors: Motoki Takabe, Koji Asada, Hidemichi Furihata, Hiroyasu Asakawa