Plastic fans having improved fan ring weld line strength
US7789628B2 · kind B2 · utility
4Cited by
4References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 28, 2006 |
| Grant date | Sep 7, 2010 |
| Priority date | — |
| Expiry date | Jul 7, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S415/915
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Injection molded ring fan embodiments and methods for making them. The methods influence material flow during the injection molding process such that a major portion of the materials flowing in opposite directions in the outer rings preferably flow past one another, intermix in a swirling relationship, and/or collide at an angle relative to one another. This results in better material mixing or integration of the flow fronts. In one embodiment, the thickness of the outer ring varies in different portions between adjacent fan blades.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.