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Class Information
Number: 138/40
Name: Pipes and tubular conduits > With flow regulators and/or baffles > Restrictors
Description: Pipes in which the means restricts the flow in the pipe, but does not cut off entirely.










Sub-classes under this class:

Class Number Class Name Patents
138/44 Central path 408
138/42 Tortuous path 440
138/46 Variable restriction 359
138/41 With screen 79


Patents under this class:
1 2 3 4 5 6

Patent Number Title Of Patent Date Issued
8671983 Gas pressure regulator Mar. 18, 2014
8668763 Apparatus for pervaporation control in liquid degassing systems Mar. 11, 2014
8646486 Elliptical chambered flow restrictor Feb. 11, 2014
8607746 Cooling system expansion tank Dec. 17, 2013
8550279 Anti-siphoning fuel device, system, and method Oct. 8, 2013
8534208 Product conveyance system for an agricultural implement Sep. 17, 2013
8516827 Aeroengine bleed valve Aug. 27, 2013
8511889 Flow distribution mixer Aug. 20, 2013
8479712 Pulsation reducing apparatus Jul. 9, 2013
8443842 Flow straightener for a flowmeter, in particular an ultrasonic metering device May. 21, 2013
8440003 Apparatus for pervaporation control in liquid degassing systems May. 14, 2013
8430131 Noise control via outlet jet frequency dispersal Apr. 30, 2013
8391696 Fuel gas conditioning system with scissor baffles Mar. 5, 2013
8387666 Noise control for fluid pressure reduction device for high pressure drop ratio Mar. 5, 2013
8375987 Concentrator for increasing the particle concentration in an aerosol flow Feb. 19, 2013
8376312 Flow restrictor Feb. 19, 2013
8365763 Pilot-controlled pressure limiting valve Feb. 5, 2013
8307943 High pressure drop muffling system Nov. 13, 2012
8295692 Scissor baffles for fuel gas conditioning system Oct. 23, 2012
8272403 Valve part of a hydraulic control valve Sep. 25, 2012
8245727 Flow control valve and method of use Aug. 21, 2012
8234987 Inductor assembly for a product conveyance system Aug. 7, 2012
8215340 Orifice plate carrier Jul. 10, 2012
8192073 Mixing apparatus and method for manufacturing an emulsified fuel Jun. 5, 2012
8147124 Static mixer Apr. 3, 2012
8042989 Multi-stage cavitation device Oct. 25, 2011
8034164 Methods and apparatus for improved control of PSA flow variations Oct. 11, 2011
7938213 Vehicle drain hole structure May. 10, 2011
7878159 Steam generator and method of adjusting flow resistance of cooling water in steam generator Feb. 1, 2011
7876562 Electronic module having thermal cooling insert Jan. 25, 2011
7819222 Device and method for attenuating energy along a conduit Oct. 26, 2010
7806144 Flow restrictor for infusion system Oct. 5, 2010
7789320 Safety straw Sep. 7, 2010
7766045 Fluid pressure reduction device for high pressure-drop ratios Aug. 3, 2010
7762715 Cavitation generator Jul. 27, 2010
7718099 Fine channel device, fine particle producing method and solvent extraction method May. 18, 2010
7690400 Noise reducing fluid passageways for fluid control devices Apr. 6, 2010
7686590 Vacuum control system Mar. 30, 2010
7648085 Drip emitter Jan. 19, 2010
7647945 Baffle for coolant passages in plastic injection molds Jan. 19, 2010
7642006 Secondary battery module Jan. 5, 2010
7621670 Unbalanced-flow, fluid-mixing plug with metering capabilities Nov. 24, 2009
7540469 Microelectromechanical flow control apparatus Jun. 2, 2009
7506666 Anti-drip ring and drip seal Mar. 24, 2009
7469709 Three-wedge double block isolation chamber Dec. 30, 2008
7431045 Flow restrictor Oct. 7, 2008
7431052 Flow restrictor and system for delivering a flow of liquid in a microcapillary Oct. 7, 2008
7334602 Apparatus for controlling flow rate of gases used in semiconductor device by differential pressure Feb. 26, 2008
7328592 Circuit for the generation of cold or heat Feb. 12, 2008
7306170 Lawn sprinkler flow control device and tool therefor Dec. 11, 2007

1 2 3 4 5 6










 
 
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