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:
Feb. 21, 2017
Filed:
Oct. 05, 2012
Panasonic Corporation, Kadoma-shi, Osaka, JP;
Abstract
A pump device (A) includes: an impeller () that rotates about an axis of rotation (A); an inlet passage () that extends along the axis of rotation (A) of the impeller (); a volute chamber () provided around the impeller (); a high-pressure chamber () provided around the inlet passage (); a circumferential wall () that separates the inlet passage () and the high-pressure chamber (); and a bypass passage () that communicates the volute chamber () and the high-pressure chamber (). The circumferential wall () has a plurality of through holes () provided in a circumferential direction. The central axis (B) of each of the through holes () is included in a plane substantially perpendicular to the axis of rotation (A). The central axis (B) is inclined with respect to a reference line (L). The direction of inclination of the central axis (B) with respect to the reference line (L) is determined so that an inlet passage side opening () of the through hole () is located downstream from a high-pressure chamber () side opening () in a rotational direction of the impeller ().