Injection molded resin gear, injection molded resin rotating body, and method for producing them
US7296491B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 4, 2004 |
| Grant date | Nov 20, 2007 |
| Priority date | — |
| Expiry date | Jul 21, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/19907
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An injection molded resin gear 1 includes an outside rim 6, an inside hub 4, a web 7 extending in radial directions to connect the rim 6 to the hub 4, and circumferential ribs 8 which are formed on both sides 9 and 9 of the web 7 between the hub 4 and the rim 6 so as to be concentric with the rim 6. A plurality of inside radial ribs 10 extending from the hub 4 to the circumferential ribs 8 are formed on the sides 9 and 9 of the web 7 between the hub 4 and the circumferential rib 8 so as to be arranged in regular intervals in circumferential directions. A plurality of outside radial ribs 11 extending from the circumferential ribs 8 to the rim 6 are formed on the sides 9 and 9 of the web 7 between the circumferential ribs 8 and the rim 6 in regular intervals to be displaced in circumferential directions with respect to the inside radial ribs 10 so as to be arranged between connecting portions at which the inside radial ribs 10 are connected to the circumferential rib 8. In the injection molded resin gear 1, injection molding gates 12 are arranged so as to be displaced in circumferential directions with respect to the inside radial ribs 10 and outside radial ribs 11.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.