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Class Information
Number: 102/222
Name: Ammunition and explosives > Igniting devices and systems > Arming devices > Blocking or interrupting type
Description: Subject matter wherein ignition requires the cooperation of at least two elements, and wherein the arming means includes movable means which selectively either prevents or permits cooperation of the two elements.










Sub-classes under this class:

Class Number Class Name Patents
102/231 Centrifugal and setback operated 33
102/237 Centrifugal operated 27
102/258 Externally released latch 12
102/223 Fluid pressure operated 41
102/247 Inertia operated 49
102/254 Slide or rotor 134
102/257 Timer operated impacting device latch 10


Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8689690 Safety and arming device with breakable lock Apr. 8, 2014
8689691 Safe and arm explosive train Apr. 8, 2014
8443727 Small smart weapon and weapon system employing the same May. 21, 2013
8434408 Multi-stage mechanical delay mechanisms for electrical switching and the like May. 7, 2013
8424455 Surface safe explosive tool Apr. 23, 2013
8381650 Safety and arming unit for a fuse Feb. 26, 2013
8245642 Projectile safety system Aug. 21, 2012
8191477 Microelectromechanical safe arm device Jun. 5, 2012
8161878 Safety and arming unit for a projectile Apr. 24, 2012
7980179 Safety and arming unit for a fuze of a projectile Jul. 19, 2011
7958810 Small smart weapon and weapon system employing the same Jun. 14, 2011
7895946 Small smart weapon and weapon system employing the same Mar. 1, 2011
7819062 Safety and arming device for high-G munitions Oct. 26, 2010
7789153 Methods and apparatuses for electronic time delay and systems including same Sep. 7, 2010
7690304 Small smart weapon and weapon system employing the same Apr. 6, 2010
7661364 Safety and arming unit for a spinning projectile fuze Feb. 16, 2010
7614346 Projectile fuze with fuze electronics including a timer/counter Nov. 10, 2009
7587979 Multi-stage mechanical delay mechanisms for inertial igniters for thermal batteries and the like Sep. 15, 2009
7493858 MEMS inertial delay device Feb. 24, 2009
7490553 Pyrotechnic safety device of reduced dimensions Feb. 17, 2009
7444937 Pyrotechnic safety device with micro-machined barrier Nov. 4, 2008
7412928 Electronic safety and arming unit Aug. 19, 2008
7383774 Microelectromechanical safing and arming apparatus Jun. 10, 2008
7168367 Submunition fuze Jan. 30, 2007
7143696 Remote digital firing system Dec. 5, 2006
7069861 Micro-scale firetrain for ultra-miniature electro-mechanical safety and arming device Jul. 4, 2006
7055437 Micro-scale firetrain for ultra-miniature electro-mechanical safety and arming device Jun. 6, 2006
7055436 Shell fuse Jun. 6, 2006
7051656 Microelectromechanical safing and arming apparatus May. 30, 2006
6860206 Remote digital firing system Mar. 1, 2005
6679174 Flare igniter with a slurry groove Jan. 20, 2004
6604467 Safety system for a projectile fuse Aug. 12, 2003
6598533 Electronic time-fuse for a projectile Jul. 29, 2003
6568329 Microelectromechanical system (MEMS) safe and arm apparatus May. 27, 2003
6431071 Mems arm fire and safe and arm devices Aug. 13, 2002
6269746 Disarm mechanism for explosive equipment Aug. 7, 2001
5705767 Miniature, planar, inertially-damped, inertially-actuated delay slider actuator Jan. 6, 1998
5392860 Heat activated safety fuse Feb. 28, 1995
5390487 Ignition safety device for a rocket motor Feb. 21, 1995
5168122 Safe-and-arm device Dec. 1, 1992
5159145 Methods and apparatus for disarming and arming well bore explosive tools Oct. 27, 1992
5159146 Methods and apparatus for selectively arming well bore explosive tools Oct. 27, 1992
5070788 Methods and apparatus for disarming and arming explosive detonators Dec. 10, 1991
5000094 Shotgun cartridge with explosive shell Mar. 19, 1991
4876961 Fuzes Oct. 31, 1989
4790246 Fuse Dec. 13, 1988
4739705 Arming and motor ignition device Apr. 26, 1988
4635552 Unique signal, safe and arm device Jan. 13, 1987
4620483 Missile safe and arm system Nov. 4, 1986
4615269 Constrained stepping motor unique code device Oct. 7, 1986

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