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. 14, 2008
Filed:
Nov. 30, 2004
Haruo Nakata, Sakai, JP;
Masakazu Hirai, Sakai, JP;
Kazushige Maeda, Sakai, JP;
Hironori Iwanaga, Sakai, JP;
Tsunehisa Sanagi, Sakai, JP;
Haruo Nakata, Sakai, JP;
Masakazu Hirai, Sakai, JP;
Kazushige Maeda, Sakai, JP;
Hironori Iwanaga, Sakai, JP;
Tsunehisa Sanagi, Sakai, JP;
Daikin Industries, Ltd., Osaka, JP;
Abstract
A drain pump is provided that reduces the operating noise when the head is low. The drain pump has a pump casing, and an impeller. The pump casing has a drain inlet for sucking in drain water at a lower end part and a drain outlet for discharging drain water at a side part. The impeller has a shaft part extending in a vertical direction inside the pump casing, a main blade disposed on the outer circumferential side of the shaft part, an auxiliary blade disposed on the lower side of the main blade, and a disc shaped dish part disposed between the main blade and the auxiliary blade. The dish part has an annular partition part extending upward from the outer circumferential edge part of the main blade, which is disposed at a position lower than the upper end part of the partition part.