Apparatus for controlling air flow in an air duct
US5769573A · kind A · utility
7Cited by
3References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 13, 1994 |
| Grant date | Jun 23, 1998 |
| Priority date | — |
| Expiry date | Sep 13, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7903
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A throttle valve is provided within a discharge air duct located adjacent a fiber duct receiving a fiber laden air stream. The throttle valve cooperates with a stop in a lowered position to form a gap to allow a minimal air flow therethrough. In addition, a weight is provided on an arm attached to the throttle valve for pivoting therewith. The weight is disposed to counterbalance a substantial portion of the weight of the flap valve in the raised position of the valve so that the air flow maintains the valve in the open condition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.