Top > Search of International Patents > GEAR WITH CORNU'S SPIRAL TOOTH PROFILE

GEAR WITH CORNU'S SPIRAL TOOTH PROFILE meetings

Foreign code F190009879
File No. 1702
Posted date Aug 20, 2019
Country WIPO
International application number 2006JP307786
International publication number WO2006109838
Date of international filing Apr 6, 2006
Date of international publication Oct 19, 2006
Priority data
  • P2005-139033 (Apr 8, 2005) JP
Title GEAR WITH CORNU'S SPIRAL TOOTH PROFILE meetings
Abstract A gear with a Cornu's spiral tooth profile, wherein a Cornu's spiral is used in the tooth profile thereof. The Cornu's spiral may be two-dimensionally deformed at a specified rate according to the application of the gear. Since the Cornu's spiral comprises a similarity, when a pressure angle is determined, the tooth profile can be standardized by module and can provide high usability. The application of the gear can be further increased by replacing the portions of the addendum and the dedendum of the gear with other curves such as circular arcs. The engagement of the gear is always performed by the surface contact of a projected surface on a recessed surface. Accordingly, since a contact surface pressure is low and the radius of curvature of the dedendum is large, the bending stress of the teeth of the gear is low and the fatigue strength thereof is also high. Even if the number of teeth is low, undercut does not occur in the teeth of the gear. Since the gear can be smoothly engaged without backlash, it can be suitably used for apparatuses for which accurate positioning is requested.
  • Applicant
  • ※All designated countries except for US in the data before July 2012
  • MIYAOKU, Tsutomu
  • KANEHIRO, Jiro
  • SASAKI, Hidekazu
  • Inventor
  • MIYAOKU, Tsutomu
  • KANEHIRO, Jiro
  • SASAKI, Hidekazu
IPC(International Patent Classification)
Reference ( R and D project ) Hiroshima Prefectural Technology Research Institute

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