| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 454369000 | FIRE DAMPER | 7 |
| 20080248739 | MAGNETICALLY ACTUATED AUTO-CLOSING AIR VENT - A self-closing vent intended for use in attics, crawl spaces, joist cavities, exterior walls, interior walls, or other structural element which allows for the free flow of air from outside a building to interior spaces during normal use. The vent includes a damper blade pivotally connected to, and disposed within, the vent housing, which is held in an open position by a temperature sensitive fusible link. Two, and preferably three, permanent magnets provide the force for driving the damper blade into a closed and locked position. A first magnet disposed in a side of the vent housing and a second magnet disposed on the damper blade are disposed with opposing (repelling) polarities when the damper blade is held in the open position. A third magnet disposed proximate the back of the vent housing is oriented so as to attract the magnet disposed on the damper blade. Thus, when the fusible link is broken by high temperatures, the first magnet propels the damper blade toward the closed position, and the third magnet attracts the damper blade to assist in putting it into a fully closed position. The third magnet and second magnet then cooperate to effect a secure closure, which is supplemented by mechanical locks disposed in the vent housing. | 10-09-2008 |
| 20080254736 | Fire damper assembly - A fire damper assembly has a damper mounted in an air duct for movements between an open, air passing position in which the damper enables air to flow through the duct and a closed position in which the damper blocks the passage of air through the duct. A strut composed of joined but separable components normally underlies the damper and supports the latter in the open position. The strut may be moved from its damper engaging position to a damper-free position while the separable components remain joined. At least one end of the strut is pivotally connected to a support arm for swinging movements of the strut between damper engaging and damper-free positions and may have its opposite end manually detached from the second support arm, thereby enabling the damper to swing to its closed position. The respective support arms are removably maintained in strut-supporting position by releasable latches which enable a tactile sensing of their positions. | 10-16-2008 |
| 20090197521 | THERMALLY-ACTUATED CARTRIDGE AND FIRE DAMPER - A thermally-actuated cartridge ( | 08-06-2009 |
| 20090197522 | THERMALLY-ACTUATED CARTRIDGE AND FIRE DAMPER - A thermally-actuated cartridge ( | 08-06-2009 |
| 20100056039 | DRIVE SYSTEM FOR A FIRE PROTECTION FLAP - The invention relates to a drive system (A) for a fire protection flap ( | 03-04-2010 |
| 20120108162 | FIRE VALVE - The invention relates to a fire valve made of a body ( | 05-03-2012 |
| 20130130613 | FIRE DAMPER FOR VENTILATING FAN - A fire damper for a ventilating fan includes a shutter and a frame provided with a flange. A preformed opening is provided on the frame. The frame is further provided with a movable component for opening or closing the preformed opening. This has the advantage of being able to share parts with others. | 05-23-2013 |
