CA1147668A - Filter-conditioner for motor cooling liquid - Google Patents
Filter-conditioner for motor cooling liquidInfo
- Publication number
- CA1147668A CA1147668A CA000348271A CA348271A CA1147668A CA 1147668 A CA1147668 A CA 1147668A CA 000348271 A CA000348271 A CA 000348271A CA 348271 A CA348271 A CA 348271A CA 1147668 A CA1147668 A CA 1147668A
- Authority
- CA
- Canada
- Prior art keywords
- filter
- radiator
- opening
- cooling liquid
- chamber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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- Filtration Of Liquid (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
Abstract A filter-conditioner including a filter and chemicals for filtering and chemically conditioning the portion of the cooling liquid which passes between the overflow tank and radiator for a motor during each heating and cooling cycle of the cooling system.
Description
915,674 FILTER-CONDITIONER FOR MOTOX COOLING LIQUID
The cooling liquid used in the cooling systems for liquid cooled englnes typically includes an ethylene glycol based antifreeze to effect efficient heat transer and prevent freezing of the cooling liquid. While ethylene glycol hased antifree~e is ef~ective for these purposes, the ethylene glycol in the cooling liquld can be ~ery corrosive to the cooling system. Also, a small percentage of the ethylene glycol will break down during repeated heating and cooling of the cooling liquid to Form glycolic or formic acids which can attack the various metals exposed in the cooling system. Additionally, cooling systems often contain particles which were left in the system when the system was assem~led, ~e.g. rust or particles remaining from the casting process) or which were subsequen~ly added to the system or produced in the ~ystem by chemical reactions described above, which particles circulate with the liquid a~ it is pumped through the cooling systeln. These particles can plug or coat portion of the passageways in the cooling system ~such as in the heater core) and decrease the efEiciency of the cooling system~
Filter-conditioner assemblies have been provided for some engines (see U.S. Patent No. 3,645j402) to both filter the cooling liquid and add chemicals to the cooling liquid to restrict such che]nical reactions. Heretofore, however, such known ~ilter-conditioners have been designed 61~
for use in pressurized portions of cooling systems which necessitates a housing for the filter-conditioner that can withstand pressures of over 12 psi above atmospheric pressure, and thus have been very expensive for use to retrofit conventional automobiles which have ~ypically not been provided such filter-conditioners at the factory. Thus to protect their cooling systems, automobile owners have typically resorted to either changing the ethylene gl~col based antifreeze in the cooling systems of their automobiles more frequently than they might otherwise desire, and/or to adding chemicals to treat the cooling liquid directly to the cooling system.
The present invention provides a filter-conditioner which can either be added to an existing cooling system in an automobile or can be incorporated in a cooling system for an automobile during its manufacture, which filter-conditioner i-s adapted for use in a nonpressurized portion of the cooling system for the automobile so that it is inexpensive to manufacture but which is still effective for both Eiltering and conditioning the cooling liquid.
The filter-conditioner according to one aspect of the present invention is incorporated in an engine cooling system of the type comprising a cooling liquid filled radiator having an overflow tube; pressure valve means in said radiator for allowing cooling liquid to flow out of said overflow tube from 2Q said radiator when the pressure in sai.d radiator exceeds atmospheric pressure by a predetermined amount as a result of heat expansion of the liquicl in the radiator, and for allowing cooling liquid to flow back into said radiator under the influence of atmospheric pressure when the pressure in said radia-tor drops below atmospheric pressure as the cooling liquid in said radiator cools; and reservoir means coupled to said overflow tube for containing cooling liquid expelled through said outlet tube and for supplying cooling liquid under about atmospheric pressure at said outlet opening when the pres-~ -2-7~:;61~
sure in said radiator drops. (Such radiator overflow systems have been factory installed in many automobiles, and can easily be added to most liquid cooling systems for motors installed either in automobiles or other vehicles or at fixed locations). The improvement according to the invention is the provi sion of walls defi.ning a filter chamber; a filter within said filter chamber for filtering particles from liquid moving through said :Eilter; means coupling said overflow tube, reservoir means and filter chamber together including valve means for causing fluid flowing from said radiator to said reservoir means under the influence of pressure in said radiator to flow around said filter and for causing fluid flowing from said reservoir means to said radia-tor under the influence of atmospheric pressure to pass through said filter.
The filter-conditioner according to the present invention provides means for filtering and chemically conditioni.ng the portion of the cooling liquid which passes between the reservoir means ~overElow tank) ancl radiator during each heating and cooling cycle of the cooling system.
For most automobil0s having this type of cooling system, about one-half liter of liquid flows between the radiator and overflow tank during each heating and cooling cycle of the cooling system. Since the engine in an automobile is typïcally started and stopped numerous times each week, treating and filtering one-half liter of its cooling liquid as a result of each operational cycle has a significant cumula~ive effect on both the chemical composition and clarity of its cooling liquid over such a 6~
time period.
Since the filter-conditioner according to the present invention is not subjected to the pressures much above atmospheric pressure, the materials of which its housing is made need not be as strong as would otherwise be the case if the filter-conditioner were incorporated in the pressurized por-tion of the cooling system. A1SOJ any couplings needed to incorporate it in the system need not be as secure and liquid tight, for even if such coup-lings were to fail and the liquid flowing to the overflow tank were lost, operation of the engine would not be prevented.
While the means for filtering and chemically conditioning could be incorporated into the overflow tank which receives and supplies liquid during the operational cycle of the engine, such overflow tanks in existing auto-mobiles have such a variety of shapes and inlet opening sizes that a Imiversal filter-conditioner for use therein would be difficult to design and such incorporation would best be done in the original design of the cooling system.
Thus the preferred embodiment of the filter-conditioner for use in retro-fitting existing cooling systems is adapted to be attached in the hose which commonly connects the overflow tube of the radiator with the overflow tank.
This filter-conditioner comprises a housing adapted for use at about atmos-pheric pressure comprising walls defining a filter chamber and a transfer chamber, said walls having a first opening into said filter chamber and a second opening into said transfer chamber and including a common wall separa-ting said chambers having spaced through first and second passageways, said housing being adapted to be coupled to said means for connecting with said first opening communicating with said overflow tank and said second opening communicating with said overflow tube; a filter within said filter chamber disposed between said first opening and said first passageway with said second passageway opening into said filter chamber on the same side o:E said filter as said first opening; and valve means at said first and second passage-ways for allowing cooling liquid flowing into said housing from said overflow tank through said first opening to pass through said filter, said first passageway, said transfer chamber and out said second opening to said overflow tube while blocking :Elow of liquid through said second passageway around said filter, and for allowing cooling liquid flowing into said housing through said second opening to pass through said transfer chamber, said second passageway into said filter chamber around said filter and out said first opening to said overflow tank while blocking flow through said first passage-way and through said filter.
Thus the portion of the liquid moved back and forth through the filter-conditioner between the radiator and overflow tank during an operation cycle of the motor will be filtered and conditioned, but only as it moves :in one direction through the filter-conditioner so that particles are collec-ted on only one side of the filter and will not be flushed back in-to the cooling system as the liquid passes in the other direction through the filter-conditioner. While the filter conditioner could be disposed to filter i-~ -5-:'. ,J
7~;6~
liquid flowing toward the overflow tank, preferably, as descri'oad above it is disposed to filtar liquid as it flows from the overflow tank toward the radiator. With this arrangement some particles will settle out of the liquid and remain in the overflow tank, thereby extending the useful life of the filter.
While filters adapted to remove particles of from 1 to 20 microns have worked in the filter-conditioner, according to the presen~ invention, filters that remove particles of from 3 to 5 microns are preferred based on their effect under test conditions.
Filters that collect particles ei~her on their surface or within their fibers are both usable. One very satis~actory 3-micron filter that collects particles within its fibers is that commercially designated 'AMF-Cuno~Ul5A3 MicroKlean Filt~r Cartridge," available from the AMF-Cuno Division, Merriden, Connecticut.
~ he chemicals contained in the filter chamber to condition the liquid may include any of those commercially available for inhibiting corrosion of the cooling system by the ethylene glycol and Eor neutrali2ing acidity of the cooling liquid in the cooling system due to deteriorzation of the ethylene glycol (e.g., that commercially designated "Nalco No. 39" availabla from
The cooling liquid used in the cooling systems for liquid cooled englnes typically includes an ethylene glycol based antifreeze to effect efficient heat transer and prevent freezing of the cooling liquid. While ethylene glycol hased antifree~e is ef~ective for these purposes, the ethylene glycol in the cooling liquld can be ~ery corrosive to the cooling system. Also, a small percentage of the ethylene glycol will break down during repeated heating and cooling of the cooling liquid to Form glycolic or formic acids which can attack the various metals exposed in the cooling system. Additionally, cooling systems often contain particles which were left in the system when the system was assem~led, ~e.g. rust or particles remaining from the casting process) or which were subsequen~ly added to the system or produced in the ~ystem by chemical reactions described above, which particles circulate with the liquid a~ it is pumped through the cooling systeln. These particles can plug or coat portion of the passageways in the cooling system ~such as in the heater core) and decrease the efEiciency of the cooling system~
Filter-conditioner assemblies have been provided for some engines (see U.S. Patent No. 3,645j402) to both filter the cooling liquid and add chemicals to the cooling liquid to restrict such che]nical reactions. Heretofore, however, such known ~ilter-conditioners have been designed 61~
for use in pressurized portions of cooling systems which necessitates a housing for the filter-conditioner that can withstand pressures of over 12 psi above atmospheric pressure, and thus have been very expensive for use to retrofit conventional automobiles which have ~ypically not been provided such filter-conditioners at the factory. Thus to protect their cooling systems, automobile owners have typically resorted to either changing the ethylene gl~col based antifreeze in the cooling systems of their automobiles more frequently than they might otherwise desire, and/or to adding chemicals to treat the cooling liquid directly to the cooling system.
The present invention provides a filter-conditioner which can either be added to an existing cooling system in an automobile or can be incorporated in a cooling system for an automobile during its manufacture, which filter-conditioner i-s adapted for use in a nonpressurized portion of the cooling system for the automobile so that it is inexpensive to manufacture but which is still effective for both Eiltering and conditioning the cooling liquid.
The filter-conditioner according to one aspect of the present invention is incorporated in an engine cooling system of the type comprising a cooling liquid filled radiator having an overflow tube; pressure valve means in said radiator for allowing cooling liquid to flow out of said overflow tube from 2Q said radiator when the pressure in sai.d radiator exceeds atmospheric pressure by a predetermined amount as a result of heat expansion of the liquicl in the radiator, and for allowing cooling liquid to flow back into said radiator under the influence of atmospheric pressure when the pressure in said radia-tor drops below atmospheric pressure as the cooling liquid in said radiator cools; and reservoir means coupled to said overflow tube for containing cooling liquid expelled through said outlet tube and for supplying cooling liquid under about atmospheric pressure at said outlet opening when the pres-~ -2-7~:;61~
sure in said radiator drops. (Such radiator overflow systems have been factory installed in many automobiles, and can easily be added to most liquid cooling systems for motors installed either in automobiles or other vehicles or at fixed locations). The improvement according to the invention is the provi sion of walls defi.ning a filter chamber; a filter within said filter chamber for filtering particles from liquid moving through said :Eilter; means coupling said overflow tube, reservoir means and filter chamber together including valve means for causing fluid flowing from said radiator to said reservoir means under the influence of pressure in said radiator to flow around said filter and for causing fluid flowing from said reservoir means to said radia-tor under the influence of atmospheric pressure to pass through said filter.
The filter-conditioner according to the present invention provides means for filtering and chemically conditioni.ng the portion of the cooling liquid which passes between the reservoir means ~overElow tank) ancl radiator during each heating and cooling cycle of the cooling system.
For most automobil0s having this type of cooling system, about one-half liter of liquid flows between the radiator and overflow tank during each heating and cooling cycle of the cooling system. Since the engine in an automobile is typïcally started and stopped numerous times each week, treating and filtering one-half liter of its cooling liquid as a result of each operational cycle has a significant cumula~ive effect on both the chemical composition and clarity of its cooling liquid over such a 6~
time period.
Since the filter-conditioner according to the present invention is not subjected to the pressures much above atmospheric pressure, the materials of which its housing is made need not be as strong as would otherwise be the case if the filter-conditioner were incorporated in the pressurized por-tion of the cooling system. A1SOJ any couplings needed to incorporate it in the system need not be as secure and liquid tight, for even if such coup-lings were to fail and the liquid flowing to the overflow tank were lost, operation of the engine would not be prevented.
While the means for filtering and chemically conditioning could be incorporated into the overflow tank which receives and supplies liquid during the operational cycle of the engine, such overflow tanks in existing auto-mobiles have such a variety of shapes and inlet opening sizes that a Imiversal filter-conditioner for use therein would be difficult to design and such incorporation would best be done in the original design of the cooling system.
Thus the preferred embodiment of the filter-conditioner for use in retro-fitting existing cooling systems is adapted to be attached in the hose which commonly connects the overflow tube of the radiator with the overflow tank.
This filter-conditioner comprises a housing adapted for use at about atmos-pheric pressure comprising walls defining a filter chamber and a transfer chamber, said walls having a first opening into said filter chamber and a second opening into said transfer chamber and including a common wall separa-ting said chambers having spaced through first and second passageways, said housing being adapted to be coupled to said means for connecting with said first opening communicating with said overflow tank and said second opening communicating with said overflow tube; a filter within said filter chamber disposed between said first opening and said first passageway with said second passageway opening into said filter chamber on the same side o:E said filter as said first opening; and valve means at said first and second passage-ways for allowing cooling liquid flowing into said housing from said overflow tank through said first opening to pass through said filter, said first passageway, said transfer chamber and out said second opening to said overflow tube while blocking :Elow of liquid through said second passageway around said filter, and for allowing cooling liquid flowing into said housing through said second opening to pass through said transfer chamber, said second passageway into said filter chamber around said filter and out said first opening to said overflow tank while blocking flow through said first passage-way and through said filter.
Thus the portion of the liquid moved back and forth through the filter-conditioner between the radiator and overflow tank during an operation cycle of the motor will be filtered and conditioned, but only as it moves :in one direction through the filter-conditioner so that particles are collec-ted on only one side of the filter and will not be flushed back in-to the cooling system as the liquid passes in the other direction through the filter-conditioner. While the filter conditioner could be disposed to filter i-~ -5-:'. ,J
7~;6~
liquid flowing toward the overflow tank, preferably, as descri'oad above it is disposed to filtar liquid as it flows from the overflow tank toward the radiator. With this arrangement some particles will settle out of the liquid and remain in the overflow tank, thereby extending the useful life of the filter.
While filters adapted to remove particles of from 1 to 20 microns have worked in the filter-conditioner, according to the presen~ invention, filters that remove particles of from 3 to 5 microns are preferred based on their effect under test conditions.
Filters that collect particles ei~her on their surface or within their fibers are both usable. One very satis~actory 3-micron filter that collects particles within its fibers is that commercially designated 'AMF-Cuno~Ul5A3 MicroKlean Filt~r Cartridge," available from the AMF-Cuno Division, Merriden, Connecticut.
~ he chemicals contained in the filter chamber to condition the liquid may include any of those commercially available for inhibiting corrosion of the cooling system by the ethylene glycol and Eor neutrali2ing acidity of the cooling liquid in the cooling system due to deteriorzation of the ethylene glycol (e.g., that commercially designated "Nalco No. 39" availabla from
2~ Nalco Chemical Co., Oak Br.ook, Illinois), for providing a water pump lubricant and for restricting foaming of the cooling liquid (e.g., that commercially desiynated "UCON
~ t`~
7~
50 HB-5100" available from ~nion Carbide~ New York, New York); or for softening the liquid in the system via ion exchange to prevent unwanted deposits or chemical reactions (e~g., Linde Molecular Sieves 5A, 0.32 5 centimeter (1/8 inch) pellets available from Linde Division, Union Carbide, New York, New York).
Also, an oil absorbing material such as the blown microfiber commercially designated "Oil Sorbant available from Minnesota Mining and Manufacturing Company of St~ Paul, Minnesota could be provided in the filter chamber to remove hydrocarbon inpurities from the cooling liquid.
The present invention will be further described with reference to the accompanying drawing wherein like number~ reer to l.ilce parts in the several views and wherein:
Figure 1 is a vertical fragmentary view of a part of a cooling system for an engine having a ilter-conditioner according to the present invention incorporated therein;
Figure 2 is an enlarged sectional top view of the filter-conditioner as shown in Figure l;
Figure 3 is an enlarged vertical sectional side view of the filter-conditioner shown in Figure l; and Figures 4 and 5 are fragmentary enlarged sectional side views of the filter-conditioner shown in Figure 1 which illustra~e the path of liquid flow in two ~ ~~4~
6~
diferent directions through the filter-conditioner.
Referring now to the drawing, ~here i~
illustrated in ~igure 1 a portion of a liquid cooling system or an engine (not shown) comprising a radiator 10 having an overflow tube 12 through which fluid may flow out of or into the radiator 10 past a conventional pressure cap 13 releasably engaged with a neck 14 of the radiator 10. The pressure cap 13 provides pressure valve means for allowing liquid to flow out of the radiator 10 when liquid in the cooling system expands and causes a predetermined pressure in the radiator 10 due to heating of the liquid via initial operation of the engine, and Eor allowing liquid to flow back into the radiator 10 under the influence of atmospheric pressure when the pressure in the radiator lO drops to a predetermined pressure below atmospheric pressure due to contraction of the liquid in the radiator 10 as it cools after the engine is shut off.
Also included in the system is an overflow reservoir means or over:Elow tank 15 for containing liquid expelled from the radiator 10 and for supplying liquid under atmospheric pressure at the outlet opening 12 of the radiator 10, which overflow tank 15 is coupled to the overflow tube via two lengths of hose 16 (one of which extends to the botto~
of the tank 15 to ensure that liquid will be sucked into the radiator 10 when the pressure therein drops to the predetermined pressure), and a filter- conditioner 18 according to the present invention be~ween the lengths of ~ ~4~6B
~9 hose 16 which provides means for iltering and chemically conditioning liquid passing in~o and out of the overflow tank 15 due to heating and cooling of the liquid in the radiator 10.
S The Eilter conditioner 18, best seen in Figures 2 through 5l includes a housing 19 comprising wall portions which may be made o an inexpensive polymeric material such as polyvinyl chloride or polypropylene. The wall portions include a cylindrical wall portion 20, circular end wall portions 22 and 23 at the ends of the cylindrical wall portion 20, a transverse wall portion 24 within and transverse of the cylindrical wall portion 20 at a po~sition spaced from the end wall portions 22 and 23~ ;
and a dividing wall portion 25 oriented parallel to the axis of the cylindrlcal wall portion 20 and dividing the ~pace between the end wall 23 and the transveese wall portion 24. These wall portions define both a filter chamber 26 and a transfer chamber 28. A tube 30 projects radially of the cylindrical wall portion 20 to provide a first opening into the filter chamber 26, and a tube 32 project~ radially of the cylindrical wall portion 20 in a direction opposite the tube 30 to provide a second opening into the transfer chamber 28. A part 34-of the transver~e wall portion 24 and the dividing wall portion 25 together provide a common wall portion separating the chambers 26 and 28 and have spaced through first and second passageways 38 and 40 respectively.
61~
A filter 42 is positioned within the filter chamber 26. The ilter 4? has a cylindrical porous wall 44 and circular end walls 46 and 48 which deine a central opening in the fi~ter 42S and is disposed with its end wall 48 sealably pressed against the adjacent surface of the transverse wall portion 24 o:E the housing 19 with an opening in the end wall 48 of the ilter 42 communicating with the passageways 38.
Valve means comprising umbrella-shaped members 50 and 52 of flexible, resilient m~terial (e.g. r fluorosilicone rubber) are provided at the passageways 38 and 40 respectively for allowing liquid flowing into the housing 19 through the inlet tube 30 to pass throuyh the filter 42 and first passageways 38 into the transfer chamber 28 while blocking flow through the second passageways 40 (Figure 5); and Eor allowing fluid flowing into the housing through ~he second inlet tube 32 to pass through the second passageways 40 and out the tube 30 while blocking flow through the first passageways 38 and throuyh the filter 42.
Each flexible umbrella-shaped member 50 or 52 is attached to the adjacent wall portion 24 or 25 via engagement of a centered stem 54 in an orifice central of the passageways 38 or 40 in that wall portion 24 or 25. A
Elexible disk~like portion 56 of the member S0 or 52 normally overlays the passageways 38 or 40, and will seal them shut in response to even a sliyht pressure against the side of the disk like portion 56 opposite the passageways 38 or 40. Upon a pressure in the passageways
~ t`~
7~
50 HB-5100" available from ~nion Carbide~ New York, New York); or for softening the liquid in the system via ion exchange to prevent unwanted deposits or chemical reactions (e~g., Linde Molecular Sieves 5A, 0.32 5 centimeter (1/8 inch) pellets available from Linde Division, Union Carbide, New York, New York).
Also, an oil absorbing material such as the blown microfiber commercially designated "Oil Sorbant available from Minnesota Mining and Manufacturing Company of St~ Paul, Minnesota could be provided in the filter chamber to remove hydrocarbon inpurities from the cooling liquid.
The present invention will be further described with reference to the accompanying drawing wherein like number~ reer to l.ilce parts in the several views and wherein:
Figure 1 is a vertical fragmentary view of a part of a cooling system for an engine having a ilter-conditioner according to the present invention incorporated therein;
Figure 2 is an enlarged sectional top view of the filter-conditioner as shown in Figure l;
Figure 3 is an enlarged vertical sectional side view of the filter-conditioner shown in Figure l; and Figures 4 and 5 are fragmentary enlarged sectional side views of the filter-conditioner shown in Figure 1 which illustra~e the path of liquid flow in two ~ ~~4~
6~
diferent directions through the filter-conditioner.
Referring now to the drawing, ~here i~
illustrated in ~igure 1 a portion of a liquid cooling system or an engine (not shown) comprising a radiator 10 having an overflow tube 12 through which fluid may flow out of or into the radiator 10 past a conventional pressure cap 13 releasably engaged with a neck 14 of the radiator 10. The pressure cap 13 provides pressure valve means for allowing liquid to flow out of the radiator 10 when liquid in the cooling system expands and causes a predetermined pressure in the radiator 10 due to heating of the liquid via initial operation of the engine, and Eor allowing liquid to flow back into the radiator 10 under the influence of atmospheric pressure when the pressure in the radiator lO drops to a predetermined pressure below atmospheric pressure due to contraction of the liquid in the radiator 10 as it cools after the engine is shut off.
Also included in the system is an overflow reservoir means or over:Elow tank 15 for containing liquid expelled from the radiator 10 and for supplying liquid under atmospheric pressure at the outlet opening 12 of the radiator 10, which overflow tank 15 is coupled to the overflow tube via two lengths of hose 16 (one of which extends to the botto~
of the tank 15 to ensure that liquid will be sucked into the radiator 10 when the pressure therein drops to the predetermined pressure), and a filter- conditioner 18 according to the present invention be~ween the lengths of ~ ~4~6B
~9 hose 16 which provides means for iltering and chemically conditioning liquid passing in~o and out of the overflow tank 15 due to heating and cooling of the liquid in the radiator 10.
S The Eilter conditioner 18, best seen in Figures 2 through 5l includes a housing 19 comprising wall portions which may be made o an inexpensive polymeric material such as polyvinyl chloride or polypropylene. The wall portions include a cylindrical wall portion 20, circular end wall portions 22 and 23 at the ends of the cylindrical wall portion 20, a transverse wall portion 24 within and transverse of the cylindrical wall portion 20 at a po~sition spaced from the end wall portions 22 and 23~ ;
and a dividing wall portion 25 oriented parallel to the axis of the cylindrlcal wall portion 20 and dividing the ~pace between the end wall 23 and the transveese wall portion 24. These wall portions define both a filter chamber 26 and a transfer chamber 28. A tube 30 projects radially of the cylindrical wall portion 20 to provide a first opening into the filter chamber 26, and a tube 32 project~ radially of the cylindrical wall portion 20 in a direction opposite the tube 30 to provide a second opening into the transfer chamber 28. A part 34-of the transver~e wall portion 24 and the dividing wall portion 25 together provide a common wall portion separating the chambers 26 and 28 and have spaced through first and second passageways 38 and 40 respectively.
61~
A filter 42 is positioned within the filter chamber 26. The ilter 4? has a cylindrical porous wall 44 and circular end walls 46 and 48 which deine a central opening in the fi~ter 42S and is disposed with its end wall 48 sealably pressed against the adjacent surface of the transverse wall portion 24 o:E the housing 19 with an opening in the end wall 48 of the ilter 42 communicating with the passageways 38.
Valve means comprising umbrella-shaped members 50 and 52 of flexible, resilient m~terial (e.g. r fluorosilicone rubber) are provided at the passageways 38 and 40 respectively for allowing liquid flowing into the housing 19 through the inlet tube 30 to pass throuyh the filter 42 and first passageways 38 into the transfer chamber 28 while blocking flow through the second passageways 40 (Figure 5); and Eor allowing fluid flowing into the housing through ~he second inlet tube 32 to pass through the second passageways 40 and out the tube 30 while blocking flow through the first passageways 38 and throuyh the filter 42.
Each flexible umbrella-shaped member 50 or 52 is attached to the adjacent wall portion 24 or 25 via engagement of a centered stem 54 in an orifice central of the passageways 38 or 40 in that wall portion 24 or 25. A
Elexible disk~like portion 56 of the member S0 or 52 normally overlays the passageways 38 or 40, and will seal them shut in response to even a sliyht pressure against the side of the disk like portion 56 opposite the passageways 38 or 40. Upon a pressure in the passageways
3~ or 40 exceeding that on the opposite side of the disk-like portion 56, however, ~he edges of the disk~like portion 56 will separate from around the passageways 38 or 40 and allow liquid flow through the passageways 38 or 40.
The filter chamber 26 may contaln one or more different chemicals 58 to provide conditioning for ~he B liquid passing through the ilter~ as was previously explained.
As illustrated, the filter chamber 26 has portions separated by a part of the transverse wall portion 24 which has a plurality of through openings 60.
The openings 60 allow free passage o liquid when liquid is flowing through the filter 42 as i8 shown in F~igure 5 r while the part of the transverse wall portion 24 in which the openings 60 are located provides a baffle to restrict disturbing the liquid around the filter 42 when liquid is flowing into the tube 32 and out the tube 30 a~ is shown in Figure 4.
To install the filter-conditioner 18 in the cooling system for an engine, a user simply severs the hose 16 between the radiator and the overflow tank, slides the severed end portions of the hose 16 over the tube3 30 and 32 with the portion of the hose 16 connected to the radiator 10 slid over the tube 32, and applies wire loops or conventional hose clamps (not shown) to retain the '7~
severed end portions of the hose in place. Additionally a bracket (no~ shown) may be attached between the filter conditloner 18 and an adjacent sturdy structural member to support the filter- conditioner 18.
After the enyine has been started, heat in the cooling system will cause the cooling liquid therein to expand and e~cape past the pressure cap 13 on the radiator 10 when a predetermined pressure is reached in the radiator 10 (e.g,, 0.8 to 1 kilograms per square centimeter). This escaping liquid will flow through the hose 16 and tube 32 into the transfer chamber 28 Iwhere the flexible disk-like portion 56 of the member 50 will prevent the liquid from flowing through the openings 38 and filter 42) through the openings 40 past the Elexible portion 56 of the member 52 which will flex away from the openings 40, into the filter chamber 26 out the tube 30 (Figure 4), and through the hose 16 into the tank 15.
This liquid displaced by expansion of liquid in the cooling system (typically about one half liter~ will then remain in the tank 15 until the engine is shut off, whereupon the liquid in the radiator will begin to cool and contract. Such contraction will cause the pressure in the radiator 10 to drop below atmospheric pressure so that atmospheric pressure on the liquid in the overflow tank 15 will cause it to flow ~hrough the hose 16 and tube into the filter chamber 26 twhere it will be prevented by the flexible disk like portion 56 of the member 52 from .. .
7~
flowing through the openings 40) through the openings 60 in the wall portion 24 into the portion of the filter chamber 26 where the chemicals 58 which treat the liquid are rekained, through the porous wall 44 of the filter 42 5 where particles in the liquid will be trapped, through the opening in the end wall part 34 and ~hrough the openings B 38 past the flexible portion ~ of the umbrella-shaped member 50 (which flexes away from the openings) into the transfer chamber 28. From the tran~fer chamber 28 the chemically treated and iltered liquid flows out the tube 32 and through the hose 16 back into the radiator lO.
The filter chamber 26 may contaln one or more different chemicals 58 to provide conditioning for ~he B liquid passing through the ilter~ as was previously explained.
As illustrated, the filter chamber 26 has portions separated by a part of the transverse wall portion 24 which has a plurality of through openings 60.
The openings 60 allow free passage o liquid when liquid is flowing through the filter 42 as i8 shown in F~igure 5 r while the part of the transverse wall portion 24 in which the openings 60 are located provides a baffle to restrict disturbing the liquid around the filter 42 when liquid is flowing into the tube 32 and out the tube 30 a~ is shown in Figure 4.
To install the filter-conditioner 18 in the cooling system for an engine, a user simply severs the hose 16 between the radiator and the overflow tank, slides the severed end portions of the hose 16 over the tube3 30 and 32 with the portion of the hose 16 connected to the radiator 10 slid over the tube 32, and applies wire loops or conventional hose clamps (not shown) to retain the '7~
severed end portions of the hose in place. Additionally a bracket (no~ shown) may be attached between the filter conditloner 18 and an adjacent sturdy structural member to support the filter- conditioner 18.
After the enyine has been started, heat in the cooling system will cause the cooling liquid therein to expand and e~cape past the pressure cap 13 on the radiator 10 when a predetermined pressure is reached in the radiator 10 (e.g,, 0.8 to 1 kilograms per square centimeter). This escaping liquid will flow through the hose 16 and tube 32 into the transfer chamber 28 Iwhere the flexible disk-like portion 56 of the member 50 will prevent the liquid from flowing through the openings 38 and filter 42) through the openings 40 past the Elexible portion 56 of the member 52 which will flex away from the openings 40, into the filter chamber 26 out the tube 30 (Figure 4), and through the hose 16 into the tank 15.
This liquid displaced by expansion of liquid in the cooling system (typically about one half liter~ will then remain in the tank 15 until the engine is shut off, whereupon the liquid in the radiator will begin to cool and contract. Such contraction will cause the pressure in the radiator 10 to drop below atmospheric pressure so that atmospheric pressure on the liquid in the overflow tank 15 will cause it to flow ~hrough the hose 16 and tube into the filter chamber 26 twhere it will be prevented by the flexible disk like portion 56 of the member 52 from .. .
7~
flowing through the openings 40) through the openings 60 in the wall portion 24 into the portion of the filter chamber 26 where the chemicals 58 which treat the liquid are rekained, through the porous wall 44 of the filter 42 5 where particles in the liquid will be trapped, through the opening in the end wall part 34 and ~hrough the openings B 38 past the flexible portion ~ of the umbrella-shaped member 50 (which flexes away from the openings) into the transfer chamber 28. From the tran~fer chamber 28 the chemically treated and iltered liquid flows out the tube 32 and through the hose 16 back into the radiator lO.
Claims (10)
PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. In an engine cooling system comprising a cooling liquid filled radiator having an overflow tube; pressure valve means in said radiator for allowing cooling liquid to flow out of said overflow tube from said radiator when the pressure in said radiator exceeds atmospheric pressure by a predetermined amount as a result of heat expansion of the liquid in the radiator, and for allowing cooling liquid to flow back into said radiator under the influence of atmospheric pressure when the pressure in said radiator drops below atmospheric pressure as the cooling liquid in said radiator cools; and reservoir means coupled to said overflow tube for containing cooling liquid expelled through said outlet tube and for supplying cooling liquid under about atmospheric pressure at said outlet opening when the pressure in said radiator drops, the improvement wherein said system includes: walls defining a filter chamber; a filter within said filter chamber for filtering particles from liquid moving through said filter; means coupling said overflow tube, reservoir means and filter chamber together including valve means for causing fluid flowing from said radiator to said reservoir means under the influence of pressure in said radiator to flow around said filter and for causing fluid flowing from said reservoir means to said radiator under the influence of atmospheric pressure to pass through said filter.
2. An engine cooling system according to claim 1 wherein: said means coupling said overflow tube, reservoir means and filter chamber together com-prises a housing including said walls defining said filter chamber and walls further defining a transfer chamber, said walls having a first opening into said filter chamber coupled to said reservoir means, having a second opening into said transfer chamber coupled to said overflow tube, and including a common wall separating said chambers having spaced through first and second passageways;
said filter is disposed in said filter chamber between said first opening and said first passageway with said second passageway opening into said filter chamber on the same side of said filter as said first opening; and said valve means comprises one-way valves at said first and second passageways disposed to allow cooling liquid flowing into said filter chamber through said first opening from said reservoir means to pass through said filter, said first passageway, said transfer chamber and said second opening to said overflow tube while blocking flow through said second passageway around said filter, and for allowing cooling liquid flowing into said transfer chamber through said second opening from said overflow tube to pass through said second passageway into said filter chamber around said filter and out said first inlet to said reservoir means while blocking flow from said transfer chamber through said first passageway and through said filter.
said filter is disposed in said filter chamber between said first opening and said first passageway with said second passageway opening into said filter chamber on the same side of said filter as said first opening; and said valve means comprises one-way valves at said first and second passageways disposed to allow cooling liquid flowing into said filter chamber through said first opening from said reservoir means to pass through said filter, said first passageway, said transfer chamber and said second opening to said overflow tube while blocking flow through said second passageway around said filter, and for allowing cooling liquid flowing into said transfer chamber through said second opening from said overflow tube to pass through said second passageway into said filter chamber around said filter and out said first inlet to said reservoir means while blocking flow from said transfer chamber through said first passageway and through said filter.
3. An engine cooling system according to claim 1 further including chemical means in said filter chamber for chemically conditioning the cooling liquid.
4. An engine cooling system according to claim 1 wherein said filter is adapted to filter out particles in the size range of 1 to 20 microns.
5. An engine cooling system according to claim 1 wherein said filter is adapted to filter out particles in the size range of 3 to 5 microns.
6. A filter-conditioner adapted for use at about atmospheric pressure to treat the cooling liquid in an engine cooling system including a radiator having an overflow tube, an overflow tank at atmospheric pressure, means for connecting said overflow tube to said overflow tank, and pressure valve means in said radiator for allowing cooling liquid to flow out of said overflow tube from said radiator and into said overflow tank when the pressure in said radiator exceeds atmospheric pressure by a predetermined amount as a result of heat expan-sion of the liquid in the radiator, and for allowing cooling liquid to flow back into said radiator from said overflow tank under the influence of atmospheric pressure when the pressure in said radiator drops below atmospheric pressure as the liquid in said radiator cools, said filter-conditioner including: a housing adapted for use at about atmospheric pressure comprising walls defining a filter chamber and a transfer chamber, said walls having a first opening into said filter chamber and a second opening into said transfer chamber and inclu-ding a common wall separating said chambers having spaced through first and second passageways, said housing being adapted to be coupled to said means for connecting with said first opening communicating with said overflow tank and said second opening communicating with said overflow tube; a filter within said filter chamber disposed between said first opening and said first passageway with said second passageway opening into said filter chamber on the same side of said filter as said first opening; and valve means at said first and second passageways for allowing cooling liquid flowing into said housing from said overflow tank through said first opening to pass through said filter, said first passageway, said transfer chamber and out said second opening to said overflow tube while blocking flow of liquid through said second passageway around said filter, and for allowing cooling liquid flowing into said housing through said second opening to pass through said transfer chamber, said second passageway into said filter chamber around said filter and out said first opening to said overflow tank while blocking flow through said first passageway and through said filter.
7. A filter-conditioner according to claim 6 -further including chemical means in said filter chamber for inhibiting corrosion by said cooling liquid, for neutralizing acidity in said cooling liquid, for lubricating and for restricting foaming of the cooling liquid.
8. A filter-conditioner according to claim 6, wherein said filter is adapted to filter out particles in the size range of 1 to 20 microns.
9. A filter-conditioner according to claim 6 wherein said filter is adapted to filter out particles in the size range of 3 to 5 microns.
10. A filter-conditioner according to claim 6 further including hydro-carbon absorbing blown microfibers in said filter chamber.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US2640679A | 1979-04-02 | 1979-04-02 | |
| US026,406 | 1979-04-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1147668A true CA1147668A (en) | 1983-06-07 |
Family
ID=21831652
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000348271A Expired CA1147668A (en) | 1979-04-02 | 1980-03-24 | Filter-conditioner for motor cooling liquid |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPS55131519A (en) |
| CA (1) | CA1147668A (en) |
-
1980
- 1980-03-24 CA CA000348271A patent/CA1147668A/en not_active Expired
- 1980-04-01 JP JP4274480A patent/JPS55131519A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS55131519A (en) | 1980-10-13 |
| JPS6321007B2 (en) | 1988-05-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |