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:
Jun. 27, 2023
Filed:
Sep. 23, 2021
Canon Kabushiki Kaisha, Tokyo, JP;
Junji Terada, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A liquid residual-amount detecting device includes an optical sensor having a pair of a light emitting portion and a light receiving portion; and a plurality of liquid cartridges, each having a containing portion, a float disposed in the containing portion, and a light shielding portion displaced on a path that crosses an optical path of detection light in synchronization with displacement of the float, wherein the light shielding portions each having a size such that a light amount of the detection light, which the light receiving portion receives, cannot be made smaller than a predetermined light amount by alone; and wherein when the float is at a highest position, they are disposed to be aligned in a direction crossing the optical path so as to shield the optical path, and the light amount, which the light receiving portion receives, is made smaller than the predetermined light amount.