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:
Dec. 15, 2020
Filed:
Sep. 26, 2018
Yamada Manufacturing Co., Ltd., Kiryu, JP;
Atsushi Kaneko, Kiryu, JP;
Kei Hosoya, Kiryu, JP;
YAMADA MANUFACTURING CO., LTD., Kiryu, JP;
Abstract
A scavenge pump includes: a pump housing including a housing body and a cover member, the housing body having a rotor chamber in which an inlet port, an outlet port, and a bearing hole formed by shaft holes with varying diameters with a stepped surface therebetween are provided; an outer rotor housed in the rotor chamber and having inner teeth; an inner rotor having outer teeth and a shaft support hole; and a drive shaft inserted or fixedly attached to the shaft support hole. The bearing hole includes a stepped inner circumferential part having a larger diameter than that of the drive shaft at an open peripheral edge on one side facing the rotor chamber, and a groove that extends through between a point close to a trailing end of the outlet port and the stepped inner circumferential part is formed.