The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 04, 2022
Filed:
Mar. 20, 2020
U-shin Ltd., Tokyo, JP;
Tetsuo Tokudome, Hiroshima, JP;
Etsuro Watanabe, Hiroshima, JP;
U-SHIN LTD., Tokyo, JP;
Abstract
A door opening and closing device includes: first and second detectors repeatedly detect a distance to a detection target around the door; and a control unit opens and closes the door using a drive unit when a predetermined operation having a plurality of stages performed by a moving object is detected. The control unit determines whether first and second objects respectively detected by the first and second detectors are the moving or stationary object. When one of the first and second objects is the moving object and the other is the stationary object and a distance to the stationary object is shorter than a first determination value, both the detection results of the first and second detectors are used for detection at a final stage, and only the detection result of the first or second detector detecting the moving object is used for detection at the other stages.