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. 29, 1987
Filed:
Aug. 30, 1985
Applicant:
Inventors:
Akira Morishita, Himeji, JP;
Kyoithi Okamoto, Himeji, JP;
Toshihiko Gotoh, Ako, JP;
Yukio Kako, Himeji, JP;
Takemi Arima, Kakogawa, JP;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16H / ;
U.S. Cl.
CPC ...
74434 ; 74DI / ; 26432812 ; 264230 ; 428 66 ;
Abstract
A planetary reduction gear has an internally-toothed ring gear which is made of a molded synthetic resin. The ring gear has a rim formed in its outer periphery in which is formed a plurality of seats comprising through seats and non-piercing holes, the seats being provided at equal intervals around the periphery of the rim. The non-piercing seats extend only part way through the thickness of the rim. The provision of seats over the entire periphery of the rim causes sink marks which develop at the time of molding of the ring gear to act uniformly and deformation of the ring gear is prevented.