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Class Information
Number: 137/99
Name: Fluid handling > Self-proportioning or correlating systems > Self-proportioning flow systems > Interconnected flow displacement elements
Description: Systems in which the proportioning or correlating means includes mechanically interconnected flow displacement elements.










Sub-classes under this class:

Class Number Class Name Patents
137/99.5 Movable trap chamber 4


Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8640729 Method and apparatus for automatic fluid shut-off Feb. 4, 2014
8387648 Device for dividing a flow equally between two or more objects Mar. 5, 2013
8342364 Fluid dispensing apparatus and method Jan. 1, 2013
8316874 Pressure plenum flow divider Nov. 27, 2012
8104648 Mixing applicator Jan. 31, 2012
7828007 Automatic pump control device Nov. 9, 2010
7192559 Methods and devices for high throughput fluid delivery Mar. 20, 2007
7131454 Piston sealing mechanism for liquid additive injection pump Nov. 7, 2006
6997350 Apparatus for adding fertilizer to water in an underground sprinkling system and fertilizer therefor Feb. 14, 2006
6899282 Injection spraying system May. 31, 2005
6769449 Water booster methods and apparatus Aug. 3, 2004
6431198 Pumping system for the injection of measured quantities of fluid into a fluid stream Aug. 13, 2002
6357466 Pumping system for the injection of measured quantities of fluid into a fluid stream Mar. 19, 2002
6299657 Process for carrying out chemical reactions using a microlaminar mixer Oct. 9, 2001
6238178 Water booster methods and apparatus May. 29, 2001
6209564 Device for adjusting pressure difference in a valve fed with two fluids of different pressures Apr. 3, 2001
6135719 Method and apparatus for metering injection pump flow Oct. 24, 2000
6029688 Water wheel for pumping chemical treatment into water stream Feb. 29, 2000
5896881 Process and device to regulate the inner pressure of a tank and/or to establish defined flow conditions for gas currents in the head space of tanks Apr. 27, 1999
RE35780 Constant ratio post-mix beverage dispensing valve May. 5, 1998
5588088 Hot water tempering system utilizing a storage tank, a bypass line and a proportional flow controller Dec. 24, 1996
5513963 Direct action fluid motor and injection pump May. 7, 1996
5513671 Hydraulically controlled water spool valve May. 7, 1996
5505224 Device for controlling piston displacement and pump including same Apr. 9, 1996
5454395 Fluid motor metering device Oct. 3, 1995
5433240 Low-ratio proportioner Jul. 18, 1995
5425968 Method and apparatus for the refinish application of multicomponent coating compositions Jun. 20, 1995
5181467 Automatic dampening water replenisher Jan. 26, 1993
5156301 Constant ratio post-mix beverage dispensing valve Oct. 20, 1992
5146944 Dual pump metering dilution apparatus Sep. 15, 1992
5121855 Beverage dispenser system using volumetric ratio control device Jun. 16, 1992
5110458 Mixer and fluid filtering unit May. 5, 1992
5108273 Helical metering pump having different sized rotors Apr. 28, 1992
5066203 Apparatus for pneumatically discharging concrete Nov. 19, 1991
5060824 Beverage dispenser system using volumetric ratio control device Oct. 29, 1991
5012837 Ratio device for dispensing liquids May. 7, 1991
4949540 Hydraulic actuator system having non-cavitating flow equalizer Aug. 21, 1990
RE33222 Pressure transfer fluid heater May. 29, 1990
4875626 Piston-powered dispensing system Oct. 24, 1989
4859157 Device for injecting fertilizer or other chemicals into a pipeline Aug. 22, 1989
4838297 Apparatus for injecting a fluid into a network Jun. 13, 1989
4832071 Fluid motor metering device May. 23, 1989
4832072 Fluid proportioning and mixing system May. 23, 1989
4827875 Dilution valves May. 9, 1989
4821761 Closed loop pump control system Apr. 18, 1989
4809731 Liquid injection apparatus having an external adjustor Mar. 7, 1989
4767059 Piston-powered dispensing system Aug. 30, 1988
4756329 Devices for the injection of an additive product metered into a main fluid Jul. 12, 1988
4651765 Fertilizer pump Mar. 24, 1987
4638924 Self mixing sprayer Jan. 27, 1987

1 2 3










 
 
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