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:
Jan. 03, 2023
Filed:
Apr. 10, 2020
Lg Electronics Inc., Seoul, KR;
LG Electronics Inc., Seoul, KR;
Abstract
A washing machine includes: a tub and a detergent supply device which supplies a liquid additive to the tub, wherein the detergent supply device includes: a cartridge containing the additive; a check valve assembly including a check valve for controlling extracting of the additive, and a check valve housing forming a space in which the extracted additive is temporarily stored; a pump for extracting the additive by changing a pressure in the space; and an outlet passage through which the temporarily stored additive is discharged, wherein the check valve assembly comprises a first outlet opening communicating with the cartridge, a second outlet opening communicating with the outlet passage, a first check valve for opening and closing the first outlet opening, and a second check valve for opening and closing the second outlet opening, wherein the first and second check valves are opened in the same direction.