|Publication number||US2455734 A|
|Publication date||Dec 7, 1948|
|Filing date||Jul 26, 1944|
|Priority date||Jul 26, 1944|
|Publication number||US 2455734 A, US 2455734A, US-A-2455734, US2455734 A, US2455734A|
|Inventors||Clausen Leon R|
|Original Assignee||Case Co J I|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (11), Referenced by (21), Classifications (15)|
|External Links: USPTO, USPTO Assignment, Espacenet|
L. R. CLAUSEN RADIATOR SHIELD Dec. 7, 1948.
Filed Jul 26, 1944 2 Sheets-Sheet 1 gwue/rvbom LON R. CLYXUSFLN L. R. CLAUSEN RADIATOR SHIELD Dec. 7, 1948.
2 Sheets-Sheet 2 Filed July 26, 1944 71' LE N R Lfl m Patented Dec. 7 1948 1. .5
Leon R. Clausen, Racine, Wis, assignor to I. 1.1
Case Company, Racine, Wis, a corporation Application July26, 1944,Serial No. 546,681
This invention relates to shields for screening thexair supplied to cool the enginesof farm machines such as harvester-threshers, balers, corn pickers, etc., of tractors pulling such machines,
or of any engines working under. dusty conditions.
The primary object of the invention is to provide a screening shield for preventing trash, chaff, insects and the like from clogging the engine cooling system, thus avoiding interference with or stoppage of air for cooling the engine.
A further object of the invention is to provide a shield designed to maintain a relatively large screen in the stream of cooling air, which screen is substantially free from'foreign particles.
A further object of the invention is to provide a shield which may be freed of a substantial part. of any chaff or other foreign matter adhering thereto by reason of the operation of the engine.
fan, without stopping the engine, thereby ensuring an adequate supply of cooling air without loss of operating time. i a
My air screening device may be applied to screen the cooling air which is drawn through the radiator of a water cooled engine, or it may be used to screen the air for cooling an air-cooled engine. i
In accomplishing the objects of the invention, the screening shield is formed of a box-like casing having inlet and outlet openings through which the cooling air for the engine passes. A screen is arranged over the inlet opening to screen out all material which might clog the cooling radiator or the cooling fins on the engine. A damper is pivotally mountedwithin the casing between the two openings and is arranged so that when moved to closed positionit substantially cuts off the air stream flowing through the casing. The damper is biased by suitable means normally to rest in open position. a r
In one form of the invention, the shield isconstructed as a stack having a lower or first section covering the front of the radiator and an upper or second section extending above or to alittle distance from the radiator to provide a relatively large space into which air is drawn through screened Walls. A damper is provided intermediate the two sections, and by closing the damper the upper section of the shield or stack may be isolated from the lower section, thereby cutting off the suction from the upper section, so that most of the accumulated chaff and foreign matter will immediately drop away from the screened walls of the upper section, whereupon the damper is again opened and the operation continues.
Ihe damper may be controlled by the operator 3 Claims. (01. rec- 53),
3015 the machineuwithout stopping it, or in the case of a combine or the like, without interrupting the forward travel.
Variouszarrangements for the accomplishment of the above objects appear in the accompanying drawings; but it .is =to .beunderstood that the invention is notlimited to the details: disclosed butincludes all such variations and modifications as fall within the spirit of the invention as herein expressed.
In the accompanying drawing: a Figure 1 isafrontelevation of a radiator shield inaccordan-ce with this invention;
Figure 2 is a slde elevation of the shield of Figure lapplied to the radiator of a water cooled engine; w 1. i .1
Figure 3 is a vertical sectional side view of a simplified formof shield applied to the front of a cooling radiator; r
l Figure 4 is a vertical sectional view of another shield construction applied to an air cooled engineyand Figure 5 is a sectional view of Figure 4 taken along line r Reierringtothe drawingin detail, the shield of Figures 1 and 2 is shown as consisting of a lower section designated generally by the numeral I, and an upper section designated generally by the numeral 2. The lower portion of the upper section 2 in the presentinstance is telescoped into the upper portion oi -the lower section I, and preferably detacha'bly connected therewith in any suitable manner. it
The section I referably is formed of sheet metal, substantially lboxshaped, and adapted to be detachably secured in any suitable manner toa radiator such as indicated in dotted lines at 3 and having an air intake 3a. The rear wall of this section isopen or cut out to provide an outlet opening substantially conforming in size and shape with the core of the radiator or intake 3a, and the front Wallis provided with a similar opening across which is secured a screen 4. The bottom wall is preferably of arcuate shape from front to back, as shown in Figure 2, and is provided with a suitably hinged and latched door 5, through which access may-be had to the radiator with the shield in position thereon.
The upper section 2 is formed of a frame construction includinga front angle-iron 6 in the present instance bent into the form of an arch, and asomewhat shorterrear angle-iron 1 also bent into the form of \anarch. Rigidly connected with the lower ends of theangle-iron i. is a plate 8 preferably formediof sheet metal which slopes downwardly and forwardly and is connected at its forward edge with a similar vertically disposed plate 9.
The plates 8 and 9 provide a solid rear wall for the lower portion of the upper section 2, and the plate 8 also provides a sloping bottom wall for the upper portion of this section, thereby reducing the girth of the upper section at the bottom thereof to conform with the girth of the lower section I. Thus a relatively large upper section is provided having a restricted throat ll! in communication with the lower section I.
cured to the side edges ofthe plates 8 and 9,, and I upper section, The front wall of this section is ,28cmay be provided normally to hold the damper pulling on the rope 29a attached to the arm 29!) is, secured to the damper 29 at the pivotal formed of a screen [2 secured tqthearched angle;
iron 6. The rear wall above the plate 8 is formed of a screen l3 secured to the arched angle-iron 'l',
the several screens constituting a screened air inlet which may be isolated from above mentioned air intake 3a. v
Pivotally mounted within the throat l'llis a damper [.4 shown in its open position in full lines. and having its closed position indicated by dotted lines. The pivotal mounting for the. damper I4 is provided by a rod" [5. rigidly secured to the damper, and suitably journaled in theside walls of the section I. If desired, thedamperrod may be pivotally mounted on the lower end of upper stack section 2. One end ofthe. rod; l5 projects beyond the adjacent side wall,.and is formed with an angular extension [5w having a pull-rope or cable l'l. secured to its outer end. Thedamper normally is held in its open position by means of a spring l8 having its respective ends connected with the extension l5a and a. part of the, shield. The rope I! extends to a point convenient 13013118 operator of the machine or vehicle.
In the use of a shield of Figures l and; 2, partof' the air supplied to. the radiator is drawn through the front screen 4, and the remainingair is drawn through the walls of the upper section 2, and then through the throat Ill and into the lower section. Should the screen 4' become clogged with chair, insects or other foreign matter to such an extent that the flow of air therethrough is materially restricted, the major portion of the air is supplied automatically through the screened air, inlet from the upper section 2. through the throat Hi. In the event of sufficient clogging of the upper screens ll, .I-2 and l31to: materially restrict the flow of air from this source; to the radiator, a pull by the operator on the rope i! will close the damper lkthereby cutting off the suction tending to holdthe foreign matter against the outer surfaces of the screens of upper stack section 2, and immediately permitting the same to drop off, after which the pull ropemay be re leased, enabling the damper M-to-bereturned to its normal open positionby the action of the spring l8. Upon stopping of themachine for some other reason, the screen 4 may be cleared of. its accumulation of foreign matter adhering thereto either manually or by stopping the engine to eliminate the suction tending to cause the foreign matter to adhere to the screen. The hingeddoor 5 provides an opening in the. shield through which the front side of the radiatormaybe cleaned of any slight accumulation of trash that'mayfindits way through the screens of the stack.
Figure 3 shows a simplified form. of-screening shield applied to the frontof a radiator. In this arrangement the shield is formed of a shell 2.5
enclosing the radiator lfii andproyided with-"an outlet opening 21 through which air is drawn into the radiator for cooling the same. The remainder of the shield is formed of a box-like casing 28 secured to the shell and extending forwardly of the radiator. The entire casing may be formed of suitable screen material, but at least a portion of the lower wall shown at 39 may be formed as a solid panel. A suitable damper 29 is arranged inside of the shield and is pivoted at its-lower edge to the shell-25 and is arranged to close the outlet opening of the shield when moved to vertical position. Suitable biasing means such as spring in horizontal position as shown in Figure 3. The damper may be moved into vertical position by axis thereof.
- Theoperation of Figure 3 is believed to be clear from the foregoing description of operation of Figures 1 and 2. In this case practically all of the wall area. of the casing forming the; shield is formed of screen material and constitutes the inlet opening of the. shield, and the damper 29. is arranged to substantially cut off the flow of air through the shield when moved to vertical position.
In Figures 4 and 5 I have shown a. form of screening shield suitable for use on an air cooled engine 3| having a crank-shaft 3?. which carries a ventilating or cooling fan 33 located at the front of. the engine. The fan 33 is adapted to direct a blast of cooling air about the cylinder or cylinders 34 of the engine and is enclosed in a casing or shroud 3.5.having an intake opening 35a in front, of thezfan. Shroud 35 is soshaped as to provide a tangential or other suitable pasageway 35b disposed so as to direct a blast of air against or about cylinder 34. The screening shield is mounted in front of the shroud 35 and has an outlet opening 36 in registry with theinlet opening oi'the shroud 35. The shield is formed of a casing 31: which conveniently may have a form which flares upwardly from the inlet 35, and is provided witha screened air inlet 38. at the top thereof. A damper 39 is pivotally mounted within casing it"! between the outlet 36 and the inlet 38 and is normally held in vertical position by suitable biasing means such as a spring 392), but may be moved into horizontal position to substantially close off the. casing and interrupt the air flow through the casing. An operating arm 39a; is provided foroperating the damper by means of arope 39c in=a manner already described in connection with Figures 1 and 2. The upperend of the casing 31 may be suitably braced to a fixed part Ofi the engine 3P0]? any fixed part of the connected;machine by means of bracket 46. A trap door 4| is provided in the front wall of the casing 3.1: in: front of the crank-shaft 32 for applying a starting crank to the engine and for cleaning out the lower part of casing 31. i The. operation, of Figures 4 and 5 is believed to be clear from the foregoing description of operation of the other embodiments of the invention. It will be understood that the screening shield in thisarrangement will prevent the trash and other foreign matter from becoming lodged between the radiating fins on the cylinders 34 of the engine or from becoming lodged in any other part ofthe engine. By this arrangement the efficiency of the cooling system is maintained at a high level.
While shields onengine cooling systems have been; used h retofore, the d culty. fclo -sins has dictated the use of screens of larger or coarser mesh than would be desirable. Such a screen would appear to remain clear merely because the finer material would pass through. This material, however, would not always pass through the radiator and in time clogging would result, thus defeating the purpose of the screen. Byvirtue of the fact that in the present invention the screens may besubstantially instantly cleaned, and as often as necessary, a screen of finer mesh can be used than has been possible heretofore, and a greatly improved filtering of the cooling air is accomplished, i
1. In a screening device for engine cooling air, a radiator shield comprising a, lower section adapted to be mounted in front of a radiator and an upper section having its upper portion of materially greater girth than the lower section, and further having a restricted lower portion attached to the lower section, said upper section having front and rear screened walls and further having screened side walls merging into a rounded screened top wall, a damper pivotally supported at the region of the restricted lower portion of the upper section, spring means normally urging the damper to open position and manually operable means connected with the damper for moving the same to closed position against the action of said spring means for interrupting the draft through said upper section for dropping accumulations of suspended material from the screened walls.
2. In a screening device for engine cooling air, a radiator shield comprising a lower section adapted to be mounted in front of a radiator and having a screened front wall, an upper section having its upper portion of materially greater girth than the lower section and further having a restricted lower portion attached to the lower section, said upper section having front, rear and side screened walls, a damper located in the restricted lower portion of the upper section and swingable into a closed position, sprin means normally urging the damper to open position and manually operable means connected with the damper for moving the same to closed position against the action of said spring for interrupting the draft through said upper section for dropping accumulations of suspended material from the screened walls.
3. In a screening device for use with an engine having a cooling air inlet to be protected from suspended particles, the combination of a casing having an inlet opening and an outlet opening registering with said cooling air inlet for passing a stream of cooling air through the device and through said cooling air inletya screen covering the inlet opening in said casing for interrupting suspended material in said air, a damper pivot-ally mounted in said casing and swingable into a closed position to substantially cut off said air stream and cause material on said screen to drop therefrom by gravity, biasing means normally acting to hold said damper in open position and manually operable control means for actuating said damper into said closed position at will.
LEON R. CLAUSEN.
REFERENCES CITED The following references are of record in the file of this patent:
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|U.S. Classification||55/417, 55/497, 165/119, 165/98, 180/68.6, 55/301, 55/282.4|
|International Classification||F01P7/10, D06F71/34, F01P7/00, D06F71/00|
|Cooperative Classification||D06F71/34, F01P7/10|
|European Classification||F01P7/10, D06F71/34|