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:
Oct. 09, 1990
Filed:
May. 01, 1989
Masahiro Okada, Kanagawa, JP;
Hiroki Matsumoto, Kanagawa, JP;
Ikeda Bussan Co., Ltd., Ayase, JP;
Abstract
Disclosed herein is a gear structure which comprises a sectoral base member of metal plate; and an arcuate flange portion integrally formed on an arcuate flange portion integrally formed on an arcuate peripheral portion of the sectoral base member. The arcuate flange portion is formed on an outer surface of thereof with forged teeth. A method of producing the gear structure is also disclosed, which comprises (a) preparing a sectoral member of metal plate, the sectoral member including a sectoral base portion and an arcuate flange portion which is integrally formed on an arcuate peripheral portion of the sectoral base portion; (b) putting the sectoral member into a press device in such a manner that the arcuate flange portion is intimately sandwiched between first and second dies, the second die having formed thereon teeth which face the arcuate flange portion; and (c) pressing the arcuate flange portion by such a degree that the arcuate flange portion is deformed to define thereon teeth by the provision of the toothed second die.