Patents by Inventor Ryo Kozawa

Ryo Kozawa 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).

  • Multiple optical axis photoelectric sensor
    Patent number: 8786436
    Abstract: A multiple optical axis photoelectric sensor is provided that stops a control output according to light being obstructed in a detection area. First and second variable signals indicate the duration of an optical axis scan processing for which light entrance detection and light obstruction detection are obtained, respectively. The first and second variable signals are updated according to results of each scan in the optical axis scan processing. When the value of the first variable reaches a predetermined first reference value, and when a final value of the second variable is equal to or lower than a predetermined second reference value, a notification is made that the light obstruction is detected due to a malfunction. As a result of this notification, whether output signal of the sensor is erroneously switched due to a cause other than an object of a detection target can correctly be made.
    Type: Grant
    Filed: August 25, 2010
    Date of Patent: July 22, 2014
    Assignee: OMRON Corporation
    Inventors: Ryo Kozawa, Kazunori Osako
  • MULTIPLE OPTICAL AXIS PHOTOELECTRIC SENSOR
    Publication number: 20120032812
    Abstract: A multiple optical axis photoelectric sensor is provided that stops a control output according to light being obstructed in a detection area. First and second variable signals indicate the duration of an optical axis scan processing for which light entrance detection and light obstruction detection are obtained, respectively. The first and second variable signals are updated according to results of each scan in the optical axis scan processing. When the value of the first variable reaches a predetermined first reference value, and when a final value of the second variable is equal to or lower than a predetermined second reference value, a notification is made that the light obstruction is detected due to a malfunction. As a result of this notification, whether output signal of the sensor is erroneously switched due to a cause other than an object of a detection target can correctly be made.
    Type: Application
    Filed: August 25, 2010
    Publication date: February 9, 2012
    Applicant: Omron Corporation
    Inventors: Ryo Kozawa, Kazunori Osako
  • Multi optical axis photoelectric sensor
    Patent number: D625632
    Type: Grant
    Filed: September 1, 2009
    Date of Patent: October 19, 2010
    Assignee: OMRON Corporation
    Inventors: Takayoshi Takahara, Kazunori Osako, Ryo Kozawa