Actuator assembly for controlling inlet air flow to centrifugal fans
US5161941A · kind A · utility
8Cited by
21References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 28, 1990 |
| Grant date | Nov 10, 1992 |
| Priority date | — |
| Expiry date | Aug 28, 2010 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF05B2200/13
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An actuator and associated linkage assembly combined to multiply the force applied by the actuator in moving a flow control disk of a centrifugal fan against the air pressure generated by the fan. The actuator includes an internal spring mechanism for closing the disk against the fan air pressure. For some applications the closing force provided by the return spring may be supplemented with an auxiliary spring mechanism that is mounted for providing maximum assistance in closing the control disk, yet not prohibiting the actuator from reopening the disk.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.