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Mold type plastic gear

  • US 6,070,484 A
  • Filed: 04/02/1998
  • Issued: 06/06/2000
  • Est. Priority Date: 04/03/1997
  • Status: Expired due to Term
First Claim
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1. A molded plastic circular gear which has removed its wall portions on an inside of a tooth root of its circumferential gear teeth portion, said gear having a circular rim formed at a distance from and on the inside of said tooth root, and wherein said gear includes gates located in a web portion on the inside of said rim for injecting resin in a molding process, said gear being characterized in that a thickness in an axial direction of at least a part of said web portion which is on the inside of said rim and extends from said gates to said circular rim is made larger than that of a web portion on an outside of said rim.

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