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:
Aug. 24, 2021
Filed:
Oct. 05, 2017
Tbk Co., Ltd., Tokyo, JP;
Yoshiyuki Terada, Tokyo, JP;
TBK Co., Ltd., Tokyo, JP;
Abstract
A gear pump comprises an internal gear (), a first external gear () and a second external gear (), a case member () having a one end side accommodation portion () for retaining these gears (), an other end side accommodation portion () at other end side and a partition wall portion () therebetween, a cover member () and a plate member (). A pump chamber (P) defined inside the internal gear () is divided into a first pump chamber (P) which has a first intake-discharge space (L) and a first discharge-intake space (H), and a second pump chamber (P) which has a second intake-discharge space (L) and a second discharge-intake space (H). The plate member has a first communication path () and a second communication path () between the plate member () and the cover member (). The one side communication passage () is communicated with the first communication path (). Two penetrating holes () are formed on the plate member (). An other side communication passage (), which communicate the two penetrating holes () with each other, is formed between the plate member () and the cover member ().