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:
Apr. 04, 2000
Filed:
Feb. 13, 1998
Applicant:
Inventor:
Shoji Morita, Kanagawa, JP;
Assignee:
Unisia Jecs Corporation, Atsugi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01C / ;
U.S. Cl.
CPC ...
417252 ; 417310 ; 418-3 ; 123 9017 ;
Abstract
A compound gear pump includes an internal gear pump including an outer rotor having on the outer periphery external teeth, an external gear pump including a rotor having on the outer periphery an external teeth circumscribed with the external teeth of the outer rotor, and a guide face arranged on the outer periphery of the outer rotor and being adjacent to the external teeth of the outer rotor in the axial direction thereof.