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Publication numberUS3344854 A
Publication typeGrant
Publication dateOct 3, 1967
Filing dateJul 20, 1965
Priority dateJul 20, 1965
Publication numberUS 3344854 A, US 3344854A, US-A-3344854, US3344854 A, US3344854A
InventorsBoyajian Myron J
Original AssigneeAllis Chalmers Mfg Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Anticlog device for engine radiators
US 3344854 A
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Description  (OCR text may contain errors)

1967 M. J. BOYAJIAN 39 9 ANTICLOG DEVICE FOR ENGINE RADIATORS Filed July 20, 1965 Q M/w w United States Patent I O 3 344 854 ANTICLOG DEVIC FOl ENGINE RADIATORS Myron J. Boyajian, Chicago, Ill., assignor to Allisgh almers Manufacturing Company, Milwaukee,

Filed July 20, 1965, Ser. No. 473,354 3 Claims. (Cl. 165-119) cooling medium by the provision of a movable endless belt screen around the heat exchanger.

Heretofore, heat exchangers such as engine radiators have become clogged due to airborne particles lodging in the cooling air passageways. This has prompted use of a fixed or removable screen which requires periodic cleaning to maintain proper cooling of the engine coolant. In some instances a screen is not used but there remains the need to periodically clean the radiator air cooling passageways. The disadvantage of the prior art constructions has been that the vehicle in which the engine is used is not available during the cleaning operation.

It is an object of the present invention to provide filtering or screening means for preventing airborne particles from lodging in the radiator without need for stopping the engine or vehicle to clean such means.

It is a further object of this invention to provide screening means for preventing clogging of an engine radiator which utilizes the air flow through the radiator to effect cleaning of the screening means.

These and other objects and advantages of this invention will be apparent from the following description when read in conjunction with the drawings in which:

FIG. 1 is a perspective view of an engine radiator structure incorporating the present invention; and

FIG. 2 is a top view of the structure shown in FIG. 1 and showing its relation to an engine.

Referring to the drawings, the engine radiator structure 11, secured to support structure 15, 15' and 20, serves as a heat exchanger for reducing the temperature of the coolant circulated through the engine 12 by an engine driven pump (not shown). The engine driven pump draws fluid from the radiator through hose 13 and connection 14 and delivers it to cooling passages in the engine block. The engine coolant passing from the engine to the top tank 17 of the radiator 11 by way of hose 19 and connection 18, passes downwardly through tubes 16 to a bottom tanklike portion 30 to which outlet connection 14 is attached.

In some vehicle installations such as forklift trucks, the engine fan 22 pushes the air through the radiator 11 in the direction indicated by arrow 23 in FIG. 1 and arrow 23' in FIG. 2. As shown in the breakaway portion of FIG. 2, the vertical tubes are spaced transversely from one another to provide air flow passageways 26 between front and rear end of the radiator.

When working in areas where the air is ladden with debris such as might be expected in cotton warehousing operations, the radiator will tend to become plugged by the cotton lint carried by the air. To obviate clogging of the radiator and the need to periodically clean the radiator or any protecting screen that might be installed, I provide an endless belt screen 31 which is disposed around the radiator in confronting relation to opposite ends of the passageways 26 through the radiator in the longitudinal direction of the vehicle. By thus completely covering both the air linet and air outlet ends of the radia- 3,344,854 Patented Oct. 3, 1967 tor 11, the air passing into the radiator will be filtered of its airborne particles by the screen 31 and particles clinging to the screen 31 at the opposite side of the radiator will be blown off. In order to provide a continuous filtering and screen cleaning operation, I provide vertically disposed rollers 32, 34 at opposite lateral sides of the radiator for permitting the screen to be moved around the radiator in its endless path. The rollers 32, 34 are rotatably mounted on the radiator structure by brackets 36, 37.

A continuous movement of the screen is permitted by provision of power means in the form of an electric motor 41 secured to the radiator. The drive shaft of the motor 41 is shown connected directly to one of the rollers 34 although it may be desired to provide a speed reducer. As shown in FIG. 1 a switch 42 may be provided to disconnect the motor from the battery 45 thus making operation of the motor selective. It should be understood of course that other means for driving the screen 31 can be provided without departing from the spirit of this invention. In order to prevent the endless screen 31 from moving transversely relative to its path of movement, I provide guide strips 43, 43' on the upper and lower portions of the radiator 11 at the front and rear ends thereof. It will be noted that the transverse width of the screen is less than the distance between the radiator coolant connections 14, 18.

From the foregoing description it is apparent that I have provided an extremely novel and useful means for preventing clogging of a radiator which does not necessitate stopping the engine or vehicle for cleaning. Thus a the time heretofore spent by the operator in unclogging the radiator or in cleaning the screen protecting the radiator is saved for useful work. By moving this screen in its endless loop or path, the debris does not buildup on the screen to such an extent that effective circulation of air through the radiator is prevented. Debris caught by the screen on the engine end of the radiator is carried by the screen to the opposite end where air passing through the radiator serves to dislodge the particles and blow them away. Thus the screen continuously filters airborne particles out of the air passing through the radiator and the air forced through the radiator by the fan serves to clean such particles from the screen at the opposite side of the radiator. In some conditions the air may be so ladden with foreign particles that it is desired to continuously rotate the screen. In which event this may be readily accomplished with my present invention. In other instances it may be desired to selectively drive the screen and for this purpose a suitable switch 42 is provided in the motor power circuit so that the motor may be selectively energized.

The embodiments of the invention in which an exclusive property or privilege is claimed are defined as fol- V lows:

1. Incombination:

an engine radiator structure having passageways between opposite ends thereof for flow of cooling air therethrough,

a support structure mounting said radiator structure,

an endless belt screen around said radiator structure covering opposite ends of said passageways,

mounting means supporting said belt screen including at least two rollers rotatably mounted on brackets on one of said structures at opposite sides of said radiator structure,

means for moving said belt screen in its endless path around said radiator structure, and

an engine fan on the outer side of said belt screen operative to force air through said belt screen, thence I 3 4 through said passageways, thence again through said References Cited sciiitleeg whereby air flowingtlirough said, ietlssagewayi UNITED STATES PATENTS w eposi oreign ma ena on sa1 e screen a one end of said radiator structure and blow foreign g zgfi material off said belt screen on the other end of said 5 e y 2,782,612 2/1967 spiegelhalter 62162 radiator structure thereby preventlng clogging of said 2 902 834 9/1959 Bosworth et a1 62 78 air passageways.

2. The combination set forth in claim 1 wherein said FOREIGN PATENTS mounting means includes a pair of rollers at each of 796,839 4/1936 France. said opposite sides of said radiator structure. 7 10 3. The combination set forth in claim 2 wherein'said STREULE, Assistant Examiner;- brackets are secured to said radiator structure. ROBERT O'LEARY, Primary Examine:

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1352963 *May 15, 1918Sep 14, 1920Aubrey F HoffmanRadiator-cover
US1638067 *Aug 2, 1926Aug 9, 1927Drying Systems IncAir-filter drive
US2782612 *Dec 5, 1955Feb 26, 1957Gen ElectricFilter for air conditioning apparatus
US2902834 *Jul 1, 1957Sep 8, 1959Carrier CorpAir conditioning apparatus
FR796839A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3446276 *Jul 7, 1967May 27, 1969Modine Mfg CoVehicle radiator core assembly
US4057105 *Jun 30, 1976Nov 8, 1977Caterpillar Tractor Co.Self-cleaning screen assembly for radiators and method
US4066119 *Aug 30, 1976Jan 3, 1978Caterpillar Tractor Co.Rotatable radiator assembly for a vehicle
US4076072 *Oct 9, 1975Feb 28, 1978Caterpillar Tractor Co.Modular heat exchanger with pivotal cores
US4125147 *Jun 13, 1977Nov 14, 1978Caterpillar Tractor Co.Method for continuously maintaining a radiator free of debris
US4160487 *Dec 30, 1977Jul 10, 1979Veb Kombinat Fortschritt LandmaschinenEngine cooling system for an agricultural vehicle
US6221120 *Apr 25, 1997Apr 24, 2001Gary C. BenningtonCleanable screen guard for fin-coil heat exchangers
US6792769Dec 14, 2001Sep 21, 2004True Manufacturing Co., Inc.Cleaning system for refrigerator condenser
US7028797Jun 14, 2003Apr 18, 2006John Cap WhiteTear-off debris guard
US7608121 *Aug 17, 2006Oct 27, 2009Delphi Technologies, Inc.HVAC system with moving filter
US8276650May 18, 2007Oct 2, 2012Caterpillar Inc.Machine having self-cleaning cooling system and method
USRE30766 *May 21, 1980Oct 13, 1981Caterpillar Tractor Co.Modular heat exchanger with pivotal cores
DE3427096A1 *Jul 23, 1984Jan 30, 1986Krauss Maffei AgCover for the cooling air intake opening of a highly motorised, cross-country vehicle
DE4425196A1 *Jul 16, 1994Feb 2, 1995Valeo Thermique Moteur SaProtective cover for a vehicle radiator assembly and radiator assembly equipped with such a cover
DE102008023555A1May 14, 2008Dec 18, 2008Caterpillar Inc., PeoriaMaschine mit selbstreinigendem Kühlsystem und Verfahren
WO1986000696A1 *Jul 12, 1985Jan 30, 1986Brent D DeckHeat exchanger cleaning
WO2012076079A1 *Oct 19, 2011Jun 14, 2012Hydac AgFluid cooling apparatus
U.S. Classification165/119, 55/354, 55/385.3, 180/68.6, 55/351, 165/95
International ClassificationF01P11/00, F01P11/12, F01P11/06
Cooperative ClassificationF01P11/06, F01P11/12, F01P2011/063
European ClassificationF01P11/06
Legal Events
Jul 28, 1983ASAssignment
Effective date: 19830329