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:
Sep. 23, 2003
Filed:
May. 17, 2002
Masaru Kobayashi, Nagano-ken, JP;
Yoshihiro Tanioka, Nagano-ken, JP;
Harmonic Drive Systems, Inc., Tokyo, JP;
Abstract
A lightweight wave gear device has a similar engagement rigidity, tooth surface hardness, and abrasion resistance as when a ferrous material is used. A cup-shaped wave gear device has a rigid internal gear that is formed of a lightweight alloy, such as an aluminum alloy, and internal teeth are formed with a height that is 1.1 to 1.3 times the height used for internal gears that are made of a ferrous material. A hard, electrolessly plated coating is also formed on the tooth surface of the internal teeth . By doing so, a lightweight wave gear device can be obtained with a similar engagement rigidity, tooth surface strength, and abrasion resistance to a wave gear device that has a rigid internal gear formed of a ferrous material.