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Class Information
Number: 138/44
Name: Pipes and tubular conduits > With flow regulators and/or baffles > Restrictors > Central path
Description: Devices in which the path of flow of the fluid is centrally of the tube.










Sub-classes under this class:

Class Number Class Name Patents
138/45 Variable restriction 386


Patents under this class:
1 2 3 4 5 6 7 8 9

Patent Number Title Of Patent Date Issued
8701715 Flow check valve assembly and method Apr. 22, 2014
8651137 Gas manifold system for steady gas supply at outlet Feb. 18, 2014
8646486 Elliptical chambered flow restrictor Feb. 11, 2014
8578971 Fluid nozzle for a pipe having a flow meter Nov. 12, 2013
8573247 Flow-rate controller, and regulator unit and valve unit used for the same Nov. 5, 2013
8567446 Flow check valve assembly and method Oct. 29, 2013
8567445 Water flow restriction device and method Oct. 29, 2013
8561426 Crimped orifice for flare fitting Oct. 22, 2013
8517057 Pump installations Aug. 27, 2013
8511347 Tamper-resistant water flow restriction system Aug. 20, 2013
8485227 Apparatus for providing conditioned fluid flows Jul. 16, 2013
8464761 Flow control arrangement Jun. 18, 2013
8459305 Dual chamber orifice fitting Jun. 11, 2013
8443842 Flow straightener for a flowmeter, in particular an ultrasonic metering device May. 21, 2013
8365765 Flow restrictor cartridge for fluid flow measurements Feb. 5, 2013
8337925 Device and component for admixing a fluid to a beverage Dec. 25, 2012
8322381 Static fluid flow conditioner Dec. 4, 2012
8286666 Mixing pipe for gas heater Oct. 16, 2012
8277548 Combined exhaust gas aftertreatment/air cleaner dust and ejector unit Oct. 2, 2012
8215340 Orifice plate carrier Jul. 10, 2012
8201579 Conveying chamber hose for a device for conveying fluid and a device for conveying fluid with the conveying chamber hose Jun. 19, 2012
8176941 Apparatus for stabilization and deceleration of supersonic flow incorporating a diverging nozzle and perforated plate May. 15, 2012
8091586 Method of manufacturing a venturi tube for a fuel system Jan. 10, 2012
8091587 Tamper-resistant water flow restriction system Jan. 10, 2012
8052151 Sealing arrangement Nov. 8, 2011
8025080 Orifice plate alignment device Sep. 27, 2011
8020663 Method for reducing the noise generated by a hole under a high energy gas flow Sep. 20, 2011
7980273 Storm water flow restriction method and apparatus Jul. 19, 2011
7958910 Filling nozzle Jun. 14, 2011
7954514 Air-admitting guide member Jun. 7, 2011
7955408 Device with no emission for treatment of exhaust gas Jun. 7, 2011
7942139 Ring insert for an air intake conduit for an internal combustion engine May. 17, 2011
7938213 Vehicle drain hole structure May. 10, 2011
7931048 Water conditioner Apr. 26, 2011
7900653 Two-way ball valve to prevent backwash Mar. 8, 2011
7845688 Multiple material piping component Dec. 7, 2010
7841365 Apparatus for controlling flow through a conduit Nov. 30, 2010
7819222 Device and method for attenuating energy along a conduit Oct. 26, 2010
7806144 Flow restrictor for infusion system Oct. 5, 2010
7806145 Housing for a flow conditioner Oct. 5, 2010
7757964 Air cap Jul. 20, 2010
7753080 Three-dimensionally intersecting diverter as an inner member for a pipe, barrel or tower Jul. 13, 2010
7726332 Durable water heating system providing rapid hot water delivery Jun. 1, 2010
7665198 Method of reducing noise for a modular fuel injector with a harmonic annular damper member Feb. 23, 2010
7607594 Nozzle apparatus and methods for providing a stream for ultrasonic testing Oct. 27, 2009
7516761 Flow rectifier for an air mass sensor Apr. 14, 2009
7497234 Storm water flow restriction method and apparatus Mar. 3, 2009
7497772 Quick change restrictor plate Mar. 3, 2009
7449159 Liquid processing device and method of manufacturing processed liquid Nov. 11, 2008
7399412 Guide means for centrifugal force separators, especially cyclone separators Jul. 15, 2008

1 2 3 4 5 6 7 8 9










 
 
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