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Class Information
Number: 138/90
Name: Pipes and tubular conduits > With closures and plugs > Test plugs
Description: Plugs for pipes having provisions whereby a fluid may be introduced into the pipe through the plug or for the attachment of a gauge for the purpose of testing the pipe for leaks.










Patents under this class:
1 2 3 4 5 6

Patent Number Title Of Patent Date Issued
RE44796 Bladder system for reinforcing a portion of a longitudinal structure Mar. 11, 2014
8651143 Device for shutting a jettisoning circuit of an aircraft Feb. 18, 2014
8646314 Externally engaging test barrier Feb. 11, 2014
8640736 Apparatus for pressure testing a plumbing system Feb. 4, 2014
8555928 Adapter bit for a device for connecting pipe conduits Oct. 15, 2013
8528777 Tube for DNA reactions Sep. 10, 2013
8522826 Isolation device for oil circuit Sep. 3, 2013
8453666 Seal for pressure testing a plumbing installation and method of use thereof Jun. 4, 2013
8443843 Air-oil separator May. 21, 2013
8397764 Safety cap for couplings and fittings Mar. 19, 2013
8365773 Valve device and testing method Feb. 5, 2013
8342209 Plug for fluid-transfer coupling device Jan. 1, 2013
8336416 Ball screw device having cooling structure Dec. 25, 2012
8333219 Plug for setting in a pipe Dec. 18, 2012
8312898 Plug with engagement members Nov. 20, 2012
8312621 Stabilizer device for through-hole electrical jacks Nov. 20, 2012
8307856 Double block and bleed plug Nov. 13, 2012
8286655 Line stop adapter Oct. 16, 2012
8281818 Systems and methods for gauging and controlling fluids and gases from pipes and orifices Oct. 9, 2012
8272405 Fitting to plug an exposed deep sea pipe Sep. 25, 2012
8267124 Pipeline isolation Sep. 18, 2012
8245732 Apparatus for pressure testing a plumbing installation Aug. 21, 2012
8176942 Closing device for a vacuum user system of an aircraft May. 15, 2012
8171961 Plug structure May. 8, 2012
8141590 Arrangement for sealing an end section of a tube or of a tubular vessel Mar. 27, 2012
8117724 Method for joining together steel pipes for conveying fluids under pressure Feb. 21, 2012
8100149 Combined pressure, temperature and air vent device Jan. 24, 2012
8061388 Chemical barrier plug assembly and manufacturing and dislodgement methods for hydrostatic and pneumatic testing Nov. 22, 2011
RE42909 Knock-out pressure test cap with breakaway nipple plug Nov. 15, 2011
8042576 Mechanical clean-out test plug Oct. 25, 2011
8042575 Spring energized plug Oct. 25, 2011
8042574 Plug with expandable packer element Oct. 25, 2011
8025079 Clean out tube check valve Sep. 27, 2011
7958911 Shipping plug Jun. 14, 2011
7909065 Pre-tensioned sealing means arrangement Mar. 22, 2011
7878221 Smartplug with wheel centralizer Feb. 1, 2011
7849882 Double plug head for plugging pipe Dec. 14, 2010
7841364 Double block and bleed plug Nov. 30, 2010
7827853 Weld testing apparatus and method for nozzles Nov. 9, 2010
7766046 Plugging system for use during an offshore pipeline laying operation Aug. 3, 2010
7740145 Bottle cap Jun. 22, 2010
7665486 Tear out test plug for plumbing installations Feb. 23, 2010
7644734 Safety cap for couplings and fittings Jan. 12, 2010
7640949 Sealing device Jan. 5, 2010
7631664 Threaded expansion plugs Dec. 15, 2009
7624759 Shower drain test plug Dec. 1, 2009
7607456 Plug for hydrostatic testing of flexible polymeric pipe or tubing Oct. 27, 2009
7597118 Pneumatic pressure relief test plug Oct. 6, 2009
7588052 Closure plug Sep. 15, 2009
7571743 Gravity flow isolation device Aug. 11, 2009

1 2 3 4 5 6










 
 
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