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Class Information
Number: 137/563
Name: Fluid handling > Systems > Closed circulating system
Description: Systems including a flow path in which at least a portion of the fluent material is continuously circulated in a closed circuit. Such system may comprise (1) one or more return by-passes in which a portion of the fluent material in a flow line is diverted from and returned to the flow line at a point upstream from the point of diversion, or (2) a system in which the main portion of a flow continuously returns to the starting point, and one or more branches are provided for tapping and removing from the circuit a portion of the fluent material or one or more branches are provided for admitting fluent material from an outside source into the circuit, or (3) all the material circulates in a confined path without addition or removal of material.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7516755 |
System for producing and distributing compressed air |
Apr. 14, 2009 |
| 7392818 |
Slurry dispensing system |
Jul. 1, 2008 |
| 7389792 |
Dip tube valve assembly |
Jun. 24, 2008 |
| 7338606 |
Arrangement and method for maintaining a minimum flow velocity in the coolant return of a machine tool coolant filtration system |
Mar. 4, 2008 |
| 7316243 |
Fluid delivery system |
Jan. 8, 2008 |
| 7308906 |
Multi-story water distribution system |
Dec. 18, 2007 |
| 7240692 |
System for producing and distributing compressed air |
Jul. 10, 2007 |
| 7178543 |
Rapid hot water apparatus and method |
Feb. 20, 2007 |
| 7172689 |
Arrangement and method for maintaining a minimum flow velocity in the coolant return of a machine tool coolant filtration system |
Feb. 6, 2007 |
| 7089955 |
Recreational vehicle low temperature water supply warming system |
Aug. 15, 2006 |
| 7077155 |
Hot water recirculating system |
Jul. 18, 2006 |
| 7077149 |
Fluid injection system |
Jul. 18, 2006 |
| 7036520 |
Hot water heater recirculation system and method |
May. 2, 2006 |
| 7028489 |
Over-pressurization protection system for cryogenic vessel |
Apr. 18, 2006 |
| 7025234 |
Apparatus and method for dispensing high-viscosity liquid |
Apr. 11, 2006 |
| 7017606 |
Primary-secondary pumping system |
Mar. 28, 2006 |
| 6997200 |
Water conservation system |
Feb. 14, 2006 |
| 6955185 |
High volume dispense head with seal verification and low foam return line |
Oct. 18, 2005 |
| 6938638 |
Gas circulating-processing apparatus |
Sep. 6, 2005 |
| 6921023 |
Self-contained water display |
Jul. 26, 2005 |
| 6920897 |
Potable water circulation system |
Jul. 26, 2005 |
| 6918406 |
Chemical supply apparatus |
Jul. 19, 2005 |
| 6861033 |
Purified water supply system for high demand devices and applications |
Mar. 1, 2005 |
| 6782907 |
Gas recirculation flow control method and apparatus for use in vacuum system |
Aug. 31, 2004 |
| 6779552 |
Domestic hot water distribution and resource conservation system |
Aug. 24, 2004 |
| 6779539 |
Dispensing apparatus for delivering controlled amounts of water soluble material to a process stream |
Aug. 24, 2004 |
| 6766822 |
Method of water distribution and apparatus therefor |
Jul. 27, 2004 |
| 6705344 |
Potable water circulation system |
Mar. 16, 2004 |
| 6688129 |
Geothermal space conditioning |
Feb. 10, 2004 |
| 6668966 |
Power steering device |
Dec. 30, 2003 |
| 6592270 |
Delivery system |
Jul. 15, 2003 |
| 6588450 |
Storage tank for viscous oil containing easily polymerizable compounds |
Jul. 8, 2003 |
| 6581637 |
Tank and a method for storing an easily polymerizable compound |
Jun. 24, 2003 |
| 6546898 |
Hydronic heating system and kit |
Apr. 15, 2003 |
| 6527007 |
Fluid transfer system |
Mar. 4, 2003 |
| 6516824 |
Apparatus and method for metering delivery quantity of ultra-low temperature liquefied gas |
Feb. 11, 2003 |
| 6488421 |
Processing photographic material |
Dec. 3, 2002 |
| 6463956 |
Method of water distribution and apparatus therefor |
Oct. 15, 2002 |
| 6453938 |
Warm drinking water conduit system |
Sep. 24, 2002 |
| 6435163 |
Fuel supply device |
Aug. 20, 2002 |
| 6374844 |
Method in operating a cavern for gas |
Apr. 23, 2002 |
| 6345644 |
Device for preventing pipeline freezing |
Feb. 12, 2002 |
| 6340033 |
Transfer of shear-thinning slurries |
Jan. 22, 2002 |
| 6293296 |
High-pressure fuel pump device |
Sep. 25, 2001 |
| 6276395 |
Processing installation for rinsing water having an independent recycling filtering device |
Aug. 21, 2001 |
| 6263906 |
Overflow proof fluid level controller |
Jul. 24, 2001 |
| 6231247 |
Recirculating-X-ray film processing apparatus |
May. 15, 2001 |
| 6220296 |
Injector/valve combination designed to improve color dosing response time |
Apr. 24, 2001 |
| 6206036 |
Recreational water recirculation system with double-shaft pump motor |
Mar. 27, 2001 |
| 6186170 |
Ozone-water feeding facility |
Feb. 13, 2001 |
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