Patents by Inventor Ritsuo Mihira

Ritsuo Mihira 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).

  • Patent number: 5619110
    Abstract: The present invention relates to a safety ensuring apparatus for ensuring the safety of an operator.A mechanical moving part is surrounded by a safety enclosure with a door of the safety enclosure provided with a door lock device constructed such that the door lock device releases a door lock when a current is supplied from outside to excite a solenoid incorporated therein. The apparatus is constructed such that a lock is released when the mechanical moving part is stopped. Moreover, the construction incorporates a moving part monitoring sensor which monitors if the mechanical moving part is stopped. When mechanical moving part is stopped, the moving part monitoring sensor generates, without a negative operation, an output signal of logic value 1 corresponding to a high energy condition, and the solenoid of the door lock device is excited by this output signal.As a result, the lock of the door lock device is released once the mechanical moving part has stopped.
    Type: Grant
    Filed: March 27, 1995
    Date of Patent: April 8, 1997
    Assignees: KAO Corporation, The Nippon Signal Co., Ltd., Yamatake & Co., Ltd.
    Inventors: Noboru Sugimoto, Masatoshi Suzuki, Koichi Futsuhara, Masayoshi Sakai, Ritsuo Mihira