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. 30, 2002
Filed:
Jun. 29, 2000
Kiyoji Minegishi, Aichi, JP;
Tetsuzo Ishikawa, Ohbu, JP;
Sumitomo Heavy Industries, Ltd., Tokyo, JP;
Abstract
To improve the sliding rotations of pins within pin (roller) retaining holes . A method of fabricating a pin (roller) retaining ring in an internal meshing gear mechanism, the mechanism having an internal gear and external gears put into internal mesh with the internal gear, the internal gear consisting of a pin (roller) retaining ring having half-round pin (roller) retaining holes in its inner periphery and pins (rollers) rotatably fitted to the respective pin retaining holes, is provided. Here, before the bore diameter &phgr;DA of a pin retaining ring base material is machined to a finished diameter, the pin retaining holes are cut as full round holes into the ring base material. The inner surfaces of the pin retaining holes are finished by roller burnishing, and then the bore diameter of the pin retaining ring is expanded to the finished diameter to obtain the pin retaining ring having the half-round pin retaining holes. This realizes the lubrication between the pin retaining holes and the pins in a state close to fluid lubrication.