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March 21, 1939. l, J. cLAPP 2,150,912 AIR Filed April 18, 1936 2 Sheets-Sheet 1

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2/72/. March 21, 1939. L. J. CLAFP 2,150,912 Filed April 18, l936 2 Sheets-Sheet 2

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- Zezczyo/CeawaZ72&evzzar: Patented Mar. 21, 1939 2,150,912

UNITED STATES PATENT OFFICE 2,150,912 AR, COMPRESSOR, Lewis J. Clapp, Michigan City, Ind., assignor to Sullivan Machinery Company, a corporation of Massachusetts Application April 8, 1936, Serial No. 75,088 18 Claims. (C. 230-182) My invention relates to air , and through a branched connection to more particularly to air-cooled air compressors. the intake of the low pressure 2. An object of my invention is to provide an im Between the tanks and 3 of the intercooler proved air compressor. Another object of my there extend or radiator sections, 5 invention is to provide an improved air-cooled air including a lower header 8, an upper header 9, 5 compressor. A further object of my invention is and connecting tubes 20; the headers being to provide an improved air-cooled air compressor clamped to the tanks and 3 respectively, and having improved means for securing the maxi in fluid communication With the latter through mum cooling effect from the air displaced by the openings 2 and 22. A Suitable protective O cooling . Yet another object of my invention Screen 23 is provided to protect the radiator sec- 10 is to provide an improved air-cooled air com tions. preSSOr having improved shrouding means. Still The compressor is provided with another object of my invention is to provide an an end plate element 25. Which Supports a bear improved air-cooled air compressor of the com ing 26 for one end of the and also pound type. Other objects and advantages of Supports a mounting for a fan 27 which is driven lis the invention will hereinafter more fully appear. by a pulley 28 on a reduced extension of the In the accompanying drawings, in which one crankshaft. The end plate 25 is provided with illustrative embodiment of the invention is side flanges 30, 30, to which there are secured shown plates 3 and 32 by suitable holding devices 33. Fig. 1 is a view partially in plan and partially These plates are generally triangular, or, more 20 With parts broken away, showing the illustrative aptly, trapeziform, in shape and support be embodiment. tween their forward upright ends the intercooler, Fig. 2 is a view partially in side elevation and for which they constitute the sole support. It in part with shrouding etc. broken away. Will be noted that these plates not only perform 2 5 Fig. 3 is a fragmentary, central, vertical sec the supporting function described, but also serve 25 tion on the plane of the line 3-3 of Fig. 1. as air-directing means and, without more, Would Fig. 4 is a fragmentary vertical section on the very effectively direct the air drawn by the fan plane of the line 4-4 of Fig. 3. through the intercooler. Over the high and low Fig. 5 is a rear end view, partially broken away, pressure cylinders. 30 of a portion of the shrouding of the compressor. However, additional air-directing means are 30 Fig. 6 is a top view, partially broken away, of desirably employed, and rearwardly of the side the Shirouding. plates there are arranged side cover elements 34 Referring to the drawings, it will be observed and 35, connected by a top cover element 36, that a crankcase Supports a low pressure cylin Whereby a Shrouding box is formed Whose for 5 ward end 37 matches or fits with the rearward 35 der 2 of the air-cooled type, and a high pres surfaces of the side plate and support elements sure cylinder 3 of the air-cooled type. Each of 3 and 32, and whose rearward end is made here Said cylinders, and the heads 4 and 5 thereof in with double walls, of which the inner ones respectively, are provided with cooling fins 6. 39 approach each other so as to form inner, The crankcase encloses a usual crankshaft, of fairly close, lateral fits for the fins 6 upon the 40 which a portion is shown at , and the usual low pressure cylinder 2; and an opening 40, here transmission means between said crankshaft and in generally rectangular in shape, provides for Within the cylinders 2 and 3. A con the egress of air from the rear of the shrouding bined drive pulley and 8 is mounted case or box. 5 upon the crankshaft T. An intercooler, general It will be observed that the side plates 3 and 45 ly designated 9, is connected in the air circuit 32 support the intercooler and provide the for between the low pressure cylinder 2 and the high Ward portion of the shrouding. It Will be ob pressure cylinder 3, a conduit C extending from served that the fan is in line with the intercooler the low pressure cylinder to a lower tank of and also opposite the finned portions of the high the intercooler, and a conduit 2 connecting an and low pressure cylinders. It will be noted that 50 upper air tank 3 of the intercooler with the high the high pressure cylinder is of less diameter pressure cylinder. A discharge line is leads than the low pressure cylinder, and accordingly from the high pressure cylinder discharge to a a considerable portion of the low pressure cylin suitable receiver, of which a fragment is shown der can receive a direct blast of air from the 5 5 at 5. Dual air cleaners 6, 6 supply air fan. It will be observed that the shrouding does 55 2 2,150,912 not fit close to the sides of the high pressure plates supported at the sides of the crankcase, a cylinder, so that there is opportunity for air dis fan between Said Side plates and between Said placed by the fan and moving outside the Zone heat exchange device and said cylinders for blow of the fins on the high pressure cylinder to pass ing cooling-air toward the latter, said side plates to the walls of the low pressure cylinder. It will arranged to direct the cooling air toward said be noted that at the side of the low pressure cyl cylinders, and conducting means connecting said inder the walls 39 of the shrouding approach the heat exchange device in series with said cylinders. sides of the fins on the low pressure cylinder and 4. In combination, in a compressor, a force nearly all the air displaced by the fan to case, air-cooled cylinders supported thereon, 10 pass around and between the fins of the low pres means for conducting an air stream between said 0 sure cylinder. It will be noted that the air is cylinders including an intercooler, and means for moving with increased velocity at this point, and Supporting said intercooler and shrouding said that the rearward portion of the shrouding, due cylinders, including plate portions respectively to the formation of the opening 40 and of the Supporting and laterally enclosing the intercooler 15 walls: 39, follows around partially behind the and laterally shrouding the cylinders to provide rearward wall of the low pressure cylinder, and Cooling-air paSSage-Ways of varying area, about thereby insures a most extended and effective the sides of said cylinders. cooling of the latter. It will be observed that 5. in combination, in a compressor, a crank there is an Opening between the rear of the case, air-cooled cylinders supported thereon in a 20 bottom of the intercooler and the forward end Series arranged longitudinally thereof, an inter 20 of the crankcase, through which some air-flow cooler connected in the air stream flowing be may take place, but the net effect of this open tWeen Said cylinders, a fan between said inter ing is mainly an ingress of fresh air which has cooler and cylinders for blowing cooling-air to not passed through the intercooler. It will be Wald the latter, and means for Supporting said 25 noted that the intercooler is, in the illustrative intercooler and shrouding said cylinders, includi embodiment of the invention, in planes trans iing plate portions respectively supporting and verse to a vertical plane including the crankshaft laterally enclosing the intercooler and laterally and the cylinder axes, and is substantially bi shrouding the cylinders, and providing cooling sected by such plane, and that the plates 3d, 32 air p3.SS2 geWays of dinninishing area from said 30 extend from the sides of the intercooler farther. far to the last cylinder. towards the cylinders than the fan-position. 6. in cooligation, in a compressor, a crank- - As a result of the construction described, a case, air-coolsd cylinders supported thereon, very simple and effective cooling arrangement is Seals for conducting an air strealin between said provided, including a very rugged and substan cylinders including an intercooler, and means for tial mounting for the intercooler and a highly ef Supporting said intercooler and shrouding said 3 5 ficient, directed, cooling-air-stream flow through cylinders, including plate portions respectively the entire compressor. Supporting and laterally enclosing the intercoolei While I have in this application specifically and shrouding the cylinders laterally and at their described one form which my invention inay tops to provide coolig-air passage-Ways of vary assume in practice, it will be understood that ing area ahgut the sides of Said cylinders. it) this form is shown for purposes of illustration, 7. In combii Ration, a compressor having a ver and that the invention may be modified and tical cylinder and a crankshaft, a vertical inter embodied in various other forms Without de cooler Substantially bisected by a vertical plane parting from its spirit or the scope of the ap Which includes the axis of said cylinder and the pended claims. axis of said crankshaft and arranged in planes What I claim as new and desire to secure by perpendicular to such plane and largely in a Letters Patent is: - - position above the horizontal plane including the 1. In combination, in a compressor, a crank crank shaft axis, a fan above said crank shaft case, a crankshaft in said crankcase, a plirality axis and between said intercooler and cylinder of cylinders supported by said crankcase, a heat for blowing cooling-air toward the latter, and . 50 exchange device arranged at one end of Said air-directing plates extending from the sides of crankcase and cut by a vertical plane in which said intercooler towards said cylinder past. Said the axis of rotation of said crankshaft lies, Sup fan. porting means for said heat exchange device, 8. In combination, a compressor having a ver including only side plates Supported at the oppo tical cylinder and a crankshaft, a vertical inter 3. 5 55 site sides of the crankcase and extending lengi cooler substantially bisected by a vertical plane tudinally of the latter, and conducting means which includes the axis of said cylinder and the connecting said heat exchange device in Series axis of said crankshaft and arranged in planes with said cylinders. perpendicular to Such plane and largely in a 2. In combination, in a compressor, a crank position above the horizontal plane including the 60 60 case, a plurality of cylinders supported by Said crank shaft axis, a fan above said crank shaft crankcase, a heat exchange device, Supportiig axis and between said intercooler and cylinder means for said heat exchange device including for blowing cooling-air toward the latter, and only side plates supported at the sides of the air-directing plates extending from the sides of crankcase, a fan between said side plates for Said intercooler towards said cylinder past, said 65 blowing cooling-air toward said cylinders, Said fan and supporting said intercooler. plates arranged to direct the cooling-air toward 9. In combination, a compressor having a ver said cylinders, and conducting means connecting tical cylinder and a crankshaft, a vertical inter said heat exchange device in Series with Said cooler substantially bisected by a vertical plane cylinders. Which includes the axis of said cylinder and the 70 70 3. In combination, in a compressor, a crank axis of said crankshaft and arranged in planes case, a plurality of cylinders Supported by Said perpendicular to Such plane, a fan between said crankcase and arranged in a series along the intercooler and cylinder for blowing cooling-air same, a heat exchange device, Supporting means toward the latter, and air-directing plates ex 75 for said heat exchange device, including only side tending from the sides of Said intercooler towards 75 2,150,912 3 Said cylinder past said fan and along the sides 14. In combination, in a compressor, a crank of Said cylinder and forming cooling-air passage case, a compressor cylinder thereon, a detach Ways of dininishing area, thereabout. able end plate for said crankcase, a heat eXchange 10. In combination, a compressor having a device, supporting means for said heat exchange crankcase, a vertical cylinder and a crankshaft, device including only side plates supported sole a vertical intercooler substantially bisected by a s Wertical plane which includes the axis of Said ly by said end plate, and conducting means for cylinder and the axis of Said crankshaft and connecting the compressor cylinder with said arranged in planes perpendicular to Such plane heat exchange device. and largely in a position above the horizontal 15. In combination, in a compressor, a crank case, a compressor cylinder thereon, a detach O plane including the Crank shaft axis, a fan above able end plate for said crankcase, bearing means Said crank Shaft axis and between Said inter Supported by Said end plate for the compressor cooler and cylinder for blowing cooling-air to crankshaft, a heat eXchange device, supporting Ward the latter, and air-directing plates extend means for said heat eXchange device mounted on ing from the sides of Said intercooler towards and entirely Supported by said end plate, and said cylinder past said fan and Supported at Conducting means for connecting a compressor 5 their lower rearward edges by Said crankcase. cylinder With said heat exchange device. 11. In combination, in a compressor, a crank 16. In combination, in a compressor, a crank case, a low pressure cylinder thereon adjacent case, a compressor cylinder thereon, a detach one end thereof, a high pressure cylinder on Said able end plate for the crankcase, said end plate crankcase adjacent the other end thereof, an having lateral lugs, a heat exchange device, Sup 20 intercooler in Spaced relation to the last men porting means for Said heat eXchange device in tioned end of the crankcase and extending par cluding only side plates Supported solely by said allel to the cylinder axes and transversely of the end plate and secured to said end plate lugs, compressor, a fan between said intercooler and and conducting means for connecting the con said high pressure cylinder for blowing cooling pressor cylinder With the heat exchange device. 25 air toward said high and low pressure cylinders, 17. In combination, in a compressor, a crank and means including lateral plates for Supporting case, air cooled cylinders supported thereon, an Said intercooler and directing the flow of air intercooler connected in the air stream flowing : through passageways of diminishing area, from between said cylinders, and means for support said fan successively past said cylinders. ing said intercooler and shrouding said cylinders, 30 12. In combination, in a compressor, a crank including plate portions respectively supporting case, a low pressure cylinder on said crankcase and laterally enclosing the intercooler and and adjacent one end thereof, a high pressure shrouding the cylinders laterally and at their cylinder on said crankcase and adjacent the other tops, said shrouding extending around partially end thereof, an intercooler in spaced relation to behind the cylinder wall farthest from the in 35 the last mentioned end of the crankcase and ex tercooler. tending parallel to the cylinder axes and trans 18. In combination, a compressor having a versely of the compressor, a fan between said crankcase supporting a vertical cylinder, and a .. intercooler and said high pressure cylinder for crankshaft below said cylinder, a vertical inter blowing cooling-air toward Said high and low cooler in planes to Which the axis of said crank 40 pressure cylinders, and means including lateral shaft is perpendicular and which lies mainly plates for supporting said intercooler and direct above the horizontal plane which includes said ing the flow of air from said fan Successively past crankshaft axis, means for supporting said in said cylinders and at an increased rate past said tercooler in Spaced relation to said cylinder in low pressure cylinder. cluding a mounting adjacent the bottom of said 45 13. In combination, in a compressor, a crank intercooler connected to one end of said crank case, a compressor cylinder thereon, a detach case, a fan between the cylinder and intercooler able end plate for said Crankcase, a heat ex driven from Said crankshaft and rotatable on an ; : change device, supporting means for said heat axis above the Crankshaft axis, and shrouding exchange device mounted on and entirely sup 50 ported by said end plate, and conducting means means for restricting the flow of air from said for connecting the compressor cylinder with said fan to the horizontal Zone of said cylinder. heat exchange device. LEWIS J. CLAPP.