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. 25, 1997
Filed:
Mar. 07, 1996
Masaoki Saitoh, Hiki-gun, JP;
Tokyo Sintered Metal Company Limited, Tokyo, JP;
Abstract
A fluid apparatus of an internal gear type comprising an internal gear 3 rotatively mounted in a housing 1, an external gear 5 meshing with said internal gear 3, and a crescent partition piece disposed between the both gears, each tooth profile of said both gears 3 and 5 being defined by a line equidistant from an inner cycloid described by a rolling circle, the diameter of which is equal to a radius of the intermeshing pitch circle of the internal gear, whereby the load applied to the tooth surfaces between the meshing internal gear and external gear and thus the tooth-contact stress can be reduced, and wear of tooth surfaces and generating noise can also be minimized.