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Class Information
Number: 169/20
Name: Fire extinguishers > Automatic valves > Pressure controlled
Description: Valves, which operate as a direct result of a pressure change in the fluid normally filling the distributing pipes or an auxiliary system of pipes extended into the area to be protected. These valves are used principally in dry pipe distributing systems and usually include a "water-valve", which is held closed against the pressure of the source by force transmitted from an "air-valve" exposed to the pressure of the fluid normally filling the distributing-pipes.










Sub-classes under this class:

Class Number Class Name Patents
169/22 Differential area 26
169/21 Lever system 5


Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8678101 Fire suppression system with pressure regulation Mar. 25, 2014
8672044 Device for increasing the effectiveness of the pressurizing gas in an extinguisher bottle Mar. 18, 2014
8668023 Releasing control unit for a residential fire protection system Mar. 11, 2014
8573315 Self-testing and self-calibrating fire sprinkler system, method of installation and method of use Nov. 5, 2013
8544556 Sprinkler Oct. 1, 2013
RE44404 Ceiling-only dry sprinkler systems and methods for addressing a storage occupancy fire Aug. 6, 2013
8499845 Method and device for controlling a fire-extinguishing system of the high-pressure gas type Aug. 6, 2013
8459369 Methods and apparatus for hazard control and signaling Jun. 11, 2013
8322452 Device for increasing the effectiveness of the pressurizing gas in an extinguisher bottle Dec. 4, 2012
8307906 Apparatus and method for automatic conversion of sprinkler system Nov. 13, 2012
8297370 Releasing control unit for a residential fire protection system Oct. 30, 2012
8281810 Dry valve for sprinkler system Oct. 9, 2012
8177189 Fire protection control valve with rotating plug May. 15, 2012
8127860 Residential dry sprinkler design method and system Mar. 6, 2012
8087468 Methods and apparatus for hazard control Jan. 3, 2012
8051915 Field convertible valve and sprinkler system Nov. 8, 2011
7987940 Hydraulic accumulator and fire suppression system Aug. 2, 2011
7987916 Integrated controls for a fire suppression system Aug. 2, 2011
7942207 Ceiling-only dry sprinkler systems and methods for addressing a storage occupancy fire May. 17, 2011
7857069 System valve activation methods for deluge-like wet pipe sprinkler system Dec. 28, 2010
7823650 Methods and apparatus for hazard control Nov. 2, 2010
7814983 Dry pipe valve for fire protection sprinkler system Oct. 19, 2010
7798239 Ceiling-only dry sprinkler systems and methods for addressing a storage occupancy fire Sep. 21, 2010
7793736 Ceiling-only dry sprinkler systems and methods for addressing a storage occupancy fire Sep. 14, 2010
7775292 CO2 fire suppression monitoring apparatus and method Aug. 17, 2010
7712543 Residential dry sprinkler design method and system May. 11, 2010
7647981 Fire suppression system Jan. 19, 2010
7530402 Water column supervisory switch May. 12, 2009
7395868 Apparatus for blocking a medium flow passage in a spray head, and spray head Jul. 8, 2008
7363987 Sprinkler system for converting non-sprinklered buildings Apr. 29, 2008
7322423 Dry pipe valve for fire protection sprinkler system Jan. 29, 2008
7240740 Diaphragm valve with pivoting closure member Jul. 10, 2007
7237619 Automatic fire sprinkler having a variable orifice Jul. 3, 2007
7104333 Dry pipe valve for fire protection sprinkler system Sep. 12, 2006
7021166 Booster actuator Apr. 4, 2006
7017673 Sprinkling head for fire fighting systems Mar. 28, 2006
6889912 Method and apparatus for removing trapped water May. 10, 2005
6860331 Single-piece manifold Mar. 1, 2005
6848513 Fire protection valve trim assembly system Feb. 1, 2005
6810963 Dry pipe valve for fire protection sprinkler system Nov. 2, 2004
6708772 Container valve with tripping device for stationary fire extinguishing plants Mar. 23, 2004
6637519 System and method for extinguishing a fire Oct. 28, 2003
6581694 Method and system for controlling the supply of nitrogen to electrical power handling equipment Jun. 24, 2003
6564877 Automatic valve with manual override for fire engine high pressure water system May. 20, 2003
6557645 Dry pipe valve for fire protection sprinkler system May. 6, 2003
6415870 Wet type sprinkler system Jul. 9, 2002
6357531 Virtual accelerator for detecting an alarm condition within a pressurized gas sprinkler system and method thereof Mar. 19, 2002
6279663 Nozzle and fire fighting installation Aug. 28, 2001
6068205 On-off control for sprinklers and the like employing a sealing membrane May. 30, 2000
6068057 Dry pipe valve system May. 30, 2000

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