Patents by Inventor Takayuki Iwao

Takayuki Iwao 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).

  • Hammer lock releasing mechanism for a printing device
    Patent number: 4483249
    Abstract: A printing device comprises a rotary type wheel provided on its outer surface with a plurality of types disposed at equal angular intervals and in at least one column, a printing hammer head disposed confronting said type wheel and undergoing displacement, in printing operation, to strike a desired type selectively onto a sheet of paper thereby to carry out printing, means for urging the hammer head to move in the direction of carrying out printing action, a mechanism for locking the hammer head in a non-printing position, and a mechanism for releasing the hammer head from its locked state by means of the locking mechanism. The locking mechanism comprises a locking member for locking the hammer head and a first spring for urging the locking member so as to make locking operation.
    Type: Grant
    Filed: September 25, 1981
    Date of Patent: November 20, 1984
    Assignee: Mitsumi Electric Co., Ltd.
    Inventors: Takayuki Iwao, Takemitsu Ono, Yukio Ishikawa
  • Hammer lock releasing mechanism for a printing device
    Patent number: 4326459
    Abstract: A printing device comprises a rotary type wheel provided on its outer surface with a plurality of types disposed at equal angular intervals and in at least one column, a printing hammer head disposed confronting said type wheel and undergoing displacement, in printing operation, to strike a desired type selectively onto a sheet of paper thereby to carry out printing, means for urging the hammer head to move in the direction of carrying out printing action, a mechanism for locking the hammer head in a non-printing position, and a mechanism for releasing the hammer head from its locked state by means of the locking mechanism. The locking mechanism comprises a locking member for locking the hammer head and a first spring for urging the locking member so as to make locking operation.
    Type: Grant
    Filed: October 24, 1979
    Date of Patent: April 27, 1982
    Assignee: Mitsumi Electric Co., Ltd.
    Inventors: Takayuki Iwao, Takemitsu Ono, Yukio Ishikawa