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Class Information
Number: 16/48.5
Name: Miscellaneous hardware > Thermally released check or closer
Description: Device including means for holding a closure open or for maintaining a closing device inoperative, said means including an element disabled at a predetermined temperature, or rate of change thereof, to release the closure or closer for movement.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 6363575 |
Door actuating system |
Apr. 2, 2002 |
| 6250326 |
Dual temperature fire damper releasing system |
Jun. 26, 2001 |
| 6092334 |
Door locking device for a door closer having a fire actuated mechanism for unlocking the door locking device |
Jul. 25, 2000 |
| 5864920 |
Door closer for the non-fire side of a fire-door safety installation |
Feb. 2, 1999 |
| 5709009 |
Door closer for the non-fire side of a fire-door safety installation |
Jan. 20, 1998 |
| 5674027 |
Exaggerated actuation and bearing-free rotational mobility in smart hinges |
Oct. 7, 1997 |
| 5645128 |
Fire safety grease seal |
Jul. 8, 1997 |
| 5393263 |
Access door eliminator for curtain fire dampers |
Feb. 28, 1995 |
| 5222277 |
Intermittently and reversibly operable hot wax energized hinge |
Jun. 29, 1993 |
| 4967444 |
Device for damping the closing movement of a dual door spring-loaded or closure and closure control therefor |
Nov. 6, 1990 |
| 4905344 |
Heat actuated link |
Mar. 6, 1990 |
| 4842136 |
Dust-proof container having improved construction for holding a reticle therein |
Jun. 27, 1989 |
| 4842106 |
Rate controllable damping mechanism |
Jun. 27, 1989 |
| 4817912 |
Bi-metal operator for smoke, fire and air control damper |
Apr. 4, 1989 |
| 4805261 |
Resettable fire link |
Feb. 21, 1989 |
| 4796420 |
Fusible link construction |
Jan. 10, 1989 |
| 4763711 |
Fire damper |
Aug. 16, 1988 |
| 4715146 |
Apparatus for closing fireproof doors |
Dec. 29, 1987 |
| 4706330 |
Automatic closing activator |
Nov. 17, 1987 |
| 4656690 |
Fireproof door closer and holder having a solenoid and a toggle mechanism |
Apr. 14, 1987 |
| 4598494 |
Apparatus for closing fireproof doors |
Jul. 8, 1986 |
| 4555981 |
Damper operator for use with air, smoke and fire dampers |
Dec. 3, 1985 |
| 4536916 |
Door holder-closer having a control signal operated hold-open function and a mechanical override facility |
Aug. 27, 1985 |
| 4506407 |
Releasable hold-open device for a door closer |
Mar. 26, 1985 |
| 4487214 |
Damper blade actuating mechanism |
Dec. 11, 1984 |
| 4483043 |
Automatic door closer |
Nov. 20, 1984 |
| 4474167 |
Latch for a butterfly damper |
Oct. 2, 1984 |
| 4472999 |
Damper operator for use with air, smoke and fire dampers |
Sep. 25, 1984 |
| 4432609 |
Radiation protection louver |
Feb. 21, 1984 |
| 4346554 |
Fusible link construction |
Aug. 31, 1982 |
| 4301569 |
Quadrant operator |
Nov. 24, 1981 |
| 4292707 |
Frictional retainer for holding a door open |
Oct. 6, 1981 |
| 4287638 |
Inside/outside link |
Sep. 8, 1981 |
| 4287639 |
Door closer permitting free-swing and regular-closer modes |
Sep. 8, 1981 |
| 4267619 |
Controlled release door holder |
May. 19, 1981 |
| 4263694 |
Door closer |
Apr. 28, 1981 |
| 4237578 |
Releasable retaining means and fire door control system |
Dec. 9, 1980 |
| 4219041 |
Electro-thermal fire protection locking clip |
Aug. 26, 1980 |
| 4213227 |
Telescoping heat responsive releasing means |
Jul. 22, 1980 |
| 4200954 |
Telescoping heat responsive releasing means |
May. 6, 1980 |
| 4195384 |
Self-resetting, cable operated translating drive link |
Apr. 1, 1980 |
| 4161804 |
Heat-actuated door latch |
Jul. 24, 1979 |
| 4121319 |
Releasable retaining means |
Oct. 24, 1978 |
| 4099292 |
Telescoping heat responsive releasing means |
Jul. 11, 1978 |
| 4074388 |
Resettable, heat actuatable fire link |
Feb. 21, 1978 |
| 4069544 |
Electrically actuated door holder and release |
Jan. 24, 1978 |
| 4050114 |
Door closer assembly |
Sep. 27, 1977 |
| 4041570 |
Resettable, heat actuatable fire link |
Aug. 16, 1977 |
| 4040143 |
Releasable door hold-open device |
Aug. 9, 1977 |
| 4034437 |
Pressure-free fail-safe emergency door closer |
Jul. 12, 1977 |
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