Fluid flow control damper assembly
US6817378B2 · kind B2 · utility
38Cited by
49References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 4, 2002 |
| Grant date | Nov 16, 2004 |
| Priority date | — |
| Expiry date | Jul 4, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/87499
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A fluid flow control damper assembly having a damper vane and a piston actuator is relatively easy to install when the outer surface of a duct is inaccessible. The piston actuator includes a powder metal piston, lacking an elastomeric (for example, rubber) seal, that is closely received within a glass cylinder. The glass cylinder has a fitting that closes one end of the cylinder and is connectable to a pneumatic control system. A drive rod is connected between the piston and the damper vane to move the damper vane between an open position and a closed position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.