Famous Patents
3M employee and church chorister Art Fry needed something to temporarily mark pages in his hymnal. He was in luck because his colleague, Spencer Silver, accidentally developed a glue that was too weak for other purposes. After initially discouraging consumer response, Post-it Notes became a hit in 1979.
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| Number | Title | Issue Date |
| 7210995 | Roof air make-up for exhaust of fire smoke A system for introducing make-up air into a building from above the roof for smoke control includes air shafts extending from the roof into a space in the building below a layer of smoke. The air shafts can be rigid or can be made of a flexible material which folds ... | 05/01/2007 |
| 7195290 | Apparatus for a fire-rated duct A duct system comprising duct sections which are factory manufactured and field modifiable. The field modifiable duct system comprises fire resistant materials and is fire-rated. The duct sections when assembled create a continuous conduit that allows air to flow fr... | 03/27/2007 |
| 6960130 | Fabric air duct with directional vent A fabric air duct of an HVAC system includes a discharge air register with an air deflector that extends along the length of the duct. Rotating or twisting the deflector adjusts the volume and/or direction of the air being discharged from the register. Even though t... | 11/01/2005 |
| 6648751 | Airflow balancer for ventilation outlet An airflow balancer for mounting on a ventilation outlet includes an air guider including a supporter having a bottom surface for rotatably supporting on the ventilation outlet and an airflow baffle coaxially mounted to the supporter such that the airflow... | 11/18/2003 |
| 6135877 | Box- or screen-like supply air terminal device and a nozzle module or nozzle unit therefor A supply air terminal device (1) of box-like or screen-like construction has a front wall (5) in which there are disposed a plurality of groups (10) of slots (7) with the groups and the slots in each group mutually spaced apart. Each group of slots is all... | 10/24/2000 |
| 5782689 | Fabric faced air distribution device An induction diffuser (100), radial flow diffuser (130), linear diffuser (150) and supply or return grille (170) use a fabric face (102, 132, 152, 172) to form the exposed portion thereof. The fabric face is preferably made of fiberglass or Kevlar coated ... | 07/21/1998 |
| 5655963 | Air-releasing endcap for fabric air dispersion system A fabric air dispersion device system with a fabric tube, and a closure attached to an open end of the tube, the closure being movable between a closed, blocking position, and an air-releasing position wherein forced air in the tube can flow past the clos... | 08/12/1997 |
| 5649860 | Duct and method for air-conditioning A method of air-conditioning a space, including: delivering pressurized air into the space from a hollow body connected to a source of pressurized air, elastically flexing an elastic flap of the hollow body under an action of the pressurized air such that... | 07/22/1997 |
| 5476419 | Thermally actuated heating/cooling air changeover deflector structure for a ceiling diffuser A thermally actuated deflector structure for automatically varying the air discharge pattern of a ceiling diffuser in response to a sensed change in the temperature of air being delivered to the diffuser includes a multi-bladed damper assembly positioned ... | 12/19/1995 |
| 5413278 | Remotely activated opposing pressure air flow control register The invention is directed to a method and apparatus for controlling airflow in a given direction in an air circulating system in which the method comprises the steps of: (a) placing a motor driven fan in the air circulating system in such a manner that th... | 05/09/1995 |
| 5346130 | Thermally responsive air diffuser A thermally powered change over diffuser for controlling the flow orientation of air discharged from a ceiling mounted duct outlet includes a pair of vanes pivotably mounted on a platform for scissor-wise movement between an open and a closed position, an... | 09/13/1994 |
| 5295905 | Air nozzle for a directed air flow into a room An air nozzle (1) for directed discharge of air into a room (A) and comprising a nozzle head (2) with an air channel (3) being adjustably provided in a mounting opening (4) in a surface (5), e.g., the wall of a compressed air channel or a compressed air c... | 03/22/1994 |
| 5156569 | Ceiling outlet A ceiling outlet and process for producing same is provided with outlet slits and air deflector slats for blowing supply air from an air-guide system into a room, wherein mountings for holding slats are bent in a metal sheet, a steel plate or a plate of a... | 10/20/1992 |
| 5103869 | Piezoelectric on-off valve for air conditioning A piezoelectric on-off value for air conditioning comprises a bendable metal plate fixed at one end thereof; a valve member mounted on the other end of the metal plate along a ceiling plate, the value member having vent holes corresponding to vent holes i... | 04/14/1992 |
| 5069114 | Device for introducing a low turbulence displacement air flow into an enclosed space A device for introducing a low turbulence air displacement flow into an enclosed space, has a first housing section enclosing an air distribution space having an air inlet on one side and air flow passages through another side, and a second housing sectio... | 12/03/1991 |
| 4979433 | Swirl outlet In a swirl outlet with an outlet plate and blowout openings provided therein for warm and/or cold air, an air jet guiding slat (10) to be regulated individually is assigned to each outlet opening (5).... | 12/25/1990 |
| 4955286 | Turbulence outlet In a turbulence outlet to be connected to a pipe connection of an air conduit having a turbulence plate (5) which exhibits slots (6) with inclined lamellae (7) or the like apertures, the turbulence plate (5) is to exhibit somewhat centrally at least one a... | 09/11/1990 |
| 4890544 | Air distribution system An air distribution system for distributing air downward from above with very low velocity. The air distribution system has an air distribution terminal (10) from which the air has been arranged to descend substantially merely by gravity effect, with very... | 01/02/1990 |
| 4815934 | Air deflector arrangement An air deflector arrangement (100) is disclosed and adapted for use in ceilings and similar areas for selectively providing discrete air flow patterns in radial directions relative to the arrangement (100). The air deflector arrangement (100) comprises a ... | 03/28/1989 |
| 4726285 | Dimpled air distribution device An air distribution apparatus having a plurality of dimples, each having small openings. The dimples having small openings provide a simple structure for causing air to be discharged from the air diffuser unit parallel to the base of the unit.... | 02/23/1988 |
| 4620869 | Clean room head assembly A vertical-flow air diffuser plenum assembly wherein a generally rectangular hood is formed of a single piece of sheet material in a generally pyramidal rectangular shape and a HEPA filter is mounted beneath the hood in a filter housing in airtight relati... | 11/04/1986 |
| 4616558 | Gaseous fluid distribution devices Devices for effecting a patterned, non-turbulent, non-aspirating flow of air or other gaseous fluid into a room or other confined area or enclosure of finite vertical and horizontal dimensions. These devices have a perforate outlet member and vanes for di... | 10/14/1986 |
| 4548068 | Downflow air filter construction and methods for air flow adjustment and leak testing thereof A HEPA-type, downflow air filter module is disclosed, having a damper supported upon a hollow tube for adjustable movement relative to an opening through which air enters the enclosed chamber or plenum above the filter media. The hollow damper support tub... | 10/22/1985 |
| 4442760 | Flow splitting arrangement for air conditioning terminal units An air conditioning terminal unit for directing heated or cooled air into a room. A duct which receives the air has two outlets which direct the air into an underlying plenum. The air in the plenum is discharged into the room through an air diffuser havin... | 04/17/1984 |
| 4380188 | Heat-retarding air distribution unit An air distribution unit for mounting in the ceiling of a room comprises a downwardly opening sheet metal box having a horizontal top wall and depending side walls. Conditioned air is introduced into the box through an inlet opening in the top wall and is... | 04/19/1983 |
| 4266470 | Universal air diffuser A universal air diffuser comprised of a fiberglass plenum having an open side and means for attaching a duct connector on a closed side opposite the open side. The closed side of the fiberglass plenum is covered with a close-fitting non-porous material wh... | 05/12/1981 |
| 4181253 | Ceiling air diffuser and induction apparatus The diffuser has outwardly flared lower side walls and an upper vertical wall portion adapted to receive primary air from a supply source. The vertical portion includes a lower extension into the space defined by the lower flared side walls, and the lower... | 01/01/1980 |
| 4170930 | Screen for improving the environment of a workplace having a plurality of working areas A screen for improving the environment of separate working areas in a working place having a plurality of such working areas, e.g. a factory floor, a workshop, an office or the like, is provided with a mechanism for connecting the screen to an air-supply ... | 10/16/1979 |
| 4159674 | Universal diffuser assembly and method of manufacturing An improved lightweight diffuser assembly having a plenum chamber formed of fiberglass laminae is provided. The diffuser assembly is universally adapted for interfacing with various size conventional ducts of an air delivery system. The plenum chamber has... | 07/03/1979 |
| 4020752 | Air diffuser with modular core An air diffuser with a modular core is disclosed in which the diffuser comprises a fixed rectangular framework retaining a plurality of removeable rectangular core elements. The direction and volume of air distributed by the diffuser is selectively change... | 05/03/1977 |
| 3986850 | Flow control apparatus and air filters A high efficiency air filter system of the type used in clean rooms and the like, and having a sliding plate valve associated with each filter. The sliding plate valve is positioned on the downstream side of each filter, and includes a highly viscous, non... | 10/19/1976 |
