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Class Information
Number: 102/333
Name: Ammunition and explosives > Blasting > Plug
Description: Subject matter which includes means to seal a blast hole opening to confine an explosion or the rapid escape of a fluid under high pressure in a blast hole.

Patents under this class:
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Patent Number Title Of Patent Date Issued
8627769 Cementitious compositions Jan. 14, 2014
8413584 Cementitious compositions Apr. 9, 2013
8342095 Self-stemming cartridge Jan. 1, 2013
8281858 Shot perforator device and method for water well bore decommissioning Oct. 9, 2012
8136449 Explosive powder plug and method of using the same Mar. 20, 2012
7690307 Mechanical stemming apparatus for mining blasting operations Apr. 6, 2010
7387071 Blasting method and blasting accessory Jun. 17, 2008
7052092 Drillhole blasting May. 30, 2006
6631684 Rock blasting method using air bladders embedded in loading layers Oct. 14, 2003
6502631 Reinforced borehole plugs Jan. 7, 2003
6454359 Method for blasting tunnels using an air bladder Sep. 24, 2002
6386111 Stemming arrangement and method for blast holes May. 14, 2002
6347837 Slide assembly having retractable gas-generator apparatus Feb. 19, 2002
6332401 Method and apparatus for pressure wave suppression in small-charge blasting Dec. 25, 2001
6330860 Method of blasting using air tubes charged in a blasthole Dec. 18, 2001
6324980 Conical plug for sealing blastholes in open cut mining Dec. 4, 2001
6321655 Method and apparatus for flyrock control in small charge blasting Nov. 27, 2001
6286430 Device for the pyrotechnic cutting of non-metallic parts Sep. 11, 2001
6213212 Spherical stemming plug and method of use Apr. 10, 2001
6209458 Inflatable plugs for charging blastholes Apr. 3, 2001
6035784 Method and apparatus for controlled small-charge blasting of hard rock and concrete by explosive pressurization of the bottom of a drill hole Mar. 14, 2000
5979327 Method and apparatus for blasthole stemming Nov. 9, 1999
5936187 Blasting stemming plug Aug. 10, 1999
5900578 Method of breaking slabs and explosive shock transmitting and moderating composition for use therein May. 4, 1999
5841060 Blast plug Nov. 24, 1998
5803172 Mine shaft and adit closure apparatus and method Sep. 8, 1998
5665933 Device for cladding tubes by means of an explosive process Sep. 9, 1997
5585593 Inert stemming materials Dec. 17, 1996
5551344 Method and apparatus for overbalanced perforating and fracturing in a borehole Sep. 3, 1996
5497829 Expansion foam borehole plug and method Mar. 12, 1996
5273110 Inflatable devices for suspending explosives and stemming materials in boreholes Dec. 28, 1993
5253586 Method of stemming a blast hole Oct. 19, 1993
5247886 Blast plug and stemming construction for blast holes Sep. 28, 1993
5198613 Waterproof device for holding explosives in a borehole and method for using the same Mar. 30, 1993
5092245 Explosive stemming device Mar. 3, 1992
5035286 Methods and apparatus for field blasting of earth formations using inflatable devices for suspending explosives in boreholes Jul. 30, 1991
5000261 Inflatable devices for suspending explosives in boreholes Mar. 19, 1991
4919203 Methods and apparatus for field blasting of earth formations using inflatable devices for suspending explosives in bore holes Apr. 24, 1990
4869173 Blasting plug with plate members and plastic resin Sep. 26, 1989
4846278 Borehole plug and method Jul. 11, 1989
4813358 Inflatable wand for loading a mining borehole Mar. 21, 1989
4807530 Expansive demolition agent Feb. 28, 1989
4774888 In situ disposable gel canister Oct. 4, 1988
4754705 Mechanical stemming construction for blast holes and method of use Jul. 5, 1988
4739690 Ballistic armor with spall shield containing an outer layer of plasticized resin Apr. 26, 1988
4736796 Tamp hole plug system and method Apr. 12, 1988
4708061 Explosive powder charge operated driving device Nov. 24, 1987
4694754 Multi-phase charge holder Sep. 22, 1987
4669540 Topping and tamping plug Jun. 2, 1987
4660644 Inflatable rubber blasting hole plug Apr. 28, 1987

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