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Publication numberUS1296058 A
Publication typeGrant
Publication dateMar 4, 1919
Filing dateJan 9, 1918
Priority dateJan 9, 1918
Publication numberUS 1296058 A, US 1296058A, US-A-1296058, US1296058 A, US1296058A
InventorsJohn M Fedders
Original AssigneeFedders Mfg Co Inc
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 1296058 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)



Patented 131312451919` vengar Buffalo,




Specication of Letters Patent.

Patented Mar-.4, 1919.

To all 'whom t may concern: Be it known that I, JOHN M. FnDDERsLa citizenof the United Statesy residing 1n N ew York, haveinvented new and useful Improvements inV Radiators, of which the following is a specification. i

'-j This `invention relates "more .particularly to that type of radiators for cooling the water of an automobile gas engine or the like in which the water passages and air conduits are made up by means of a plurality of'tubes each of which has an enlargement at its opposite ends while its intermediate part is contracted so that upon assembling a plurality of such tubes side by side, the enlargements at opposite ends of the tubes will engage with each other andV ractically form heads on oppositesides of t e radiator core while the spaces formed between the contracted central parts of these tubes serve as water passages and the conduits formed by the bores of the several tubes serve as air passages for carrying awa the heat of the Water which is circulated tliroughthe water passages.

Heretofre such tubes `have been made comparatively small and 'a large number were usuallyemployed for a given size radiator so that the cost of the .same was considerable and practically prohibitive in cases where a low priced radiator was required.

In order to reduce the cost of a radiator of this type this invention proposes to make the tubes of larger diameter so that a smaller number of the same is requiredfor a given size radiator. however would permit too 'free a passageof air'through the tubes and not yield the maximum efiiciency unless some provision were made for increasing the radiation of heat from the inner side or bore of the tubes.

It is therefore one of the objects of this invention to provide simple, eiicient and inexpensive radiatin means Within the tubes which can be readi y and quickly assembled with the tubes and which will eii'ectivel dissipate the heat to the. atmosphere and still .preserve an ornamental appearance of the -radiator when viewed from either of its sides.

A further object of this invention is to so construct the tubes as to render them stiff and strong and without appreciably stretching the material but instead so disposing the in' the vcounty of Erie and State ofy Such increase in diameter without a seam,

same by avoided. In the accompanying drawings: Figure l 1sv a front elevation, partly in section, of a radiator-core embodying my invention. Fig. 2 is a fragmentary vertical longitudinal sec tion of the same taken on line 2 2, Fig. l. Fig. 3 is a perspective view of one of the tubes forming part of' the body of the radiator core. Fig. 4f is a perspective view of one of the sectionsof one of the radiating devices within one cross section, on an enlarged scale, of one of the tubes showing a modified construction of the same, and. also containing an internal radiating device similar to that shown in Figs. l and 2. Fig. 6 is a section similar to Fig. 2, and showing a slight modification in the form of the radiating means within the air tubes or conduits.

Similar characters of reference refer to like parts throughout the several views.

Each of the tubes of Which a plurality are employed to make u the body of the radiator core is preferab y constructed of sheet metal and is shaped so as to form enlargements 1, 1, at opposite ends of this tube while its intermediate or central part between these large ends is contracted or reduced in diameter, as shown at 2. These tubes may be formed either by drawing sheet metal through dies so that the tubes are seamless, 'as shown in Fig. 1, or the same may be formed from a sheet metal blank which is bent into the form of a tube and has its longitudinal edges connected by means of a lock seam 3 to complete the tube, as shown in Fig. 5. Such a tubular body, either with or is first produced so that the same is of uniform diameter throughout its length and thereafter this tubular body is subjected to the operation of suitable dies or forming mechanism which contracts the intermediate or central part of the body but leaves the end portions thereof uncontracted thereby causing the central part of the tube to be mainly bent to effectsuch contraction.

Inasmuch as the metal from which these cumferentially of the tube. By thus dishof the tubes. Fig. 5 is a ing' the facets of these flutes inwardly, the

I surplus metal in the central part of the tube 'corresponding hexagonal shape, as shown in Figs. l, 2 and 5. Upon assembling a. plurality of such tubes side by side, the facets of the enlargements at opposite ends of the Y several tubes are fitted against each other, so

that these several enlargen'ients together.

practically form heads on the front and rear sides of the radiator core while the spaces between the adjacent coi-.tract'ed central parts of the several tubes lform water passages 5` and the conduits through the bores of the several tubes form air passages 6. In the completed radiator, this core is associated with water inlet and outlet boxes which communicate with the opposite ends of the water passages and the sides of these passages are closed in any suitable manner to prevent leakage.

Within each of' the tubes is arranged a radiating device which operates to increase .the dissipation of the heat in the water from the bore of the tube to the atmosphere. Although-these radiating means may be varied, so far as their details of construction are concerned, the same preferably comprises a plurality of sheet metal sections, preferably lthree in number, each of which is bent so as to form two longitudinal flanges 7, 7 which are connected with each other at their inner longitudinaledges and arranged in substantially V-shaped form in cross section. Each of the flan es of a radiating section has its outer longitudinal edge provided adjacent .to its opposite ends withv projecting edge portions 8, 8 and intermediate of said portions Wi'th a receding edge portion 9. In assembling thesev sections with a tube, three of these sections are placed within the tube so that the inner sides of the corners or angles of the several radiating sect-ions engage with each other while the projecting end portions oftheir flanges engage with the bore of the enlargements of the tube and the receding central edge portions of these flanges engage with the contracted central part of the tube. These sectionsof the radiating means may be thus introduced into a tube by first pushing two of the sections into place within the tube which can be done freely and then springing the third 'section into place between the tube and the other sections, and when thus assembled these radiating sections are held against lengthwise displacement in the tube by reason of the projecting end portions of the flanges en gaging with the enlargements at opposite ends of the tube.

instead of springing any of the radiating sectlons for the purpose of introducing the same into`, such introduction 'of the radiating sections into the tube rnay'be ef-,

fected by splitting each section'transversely about midway of its length, as shown at l0 in Fig. 6, thereby permitting one-half of each radiating section to be introduced into the tube from one end thereof and the other half from the opposite end thereof.

ln assembling these radiating sections with the tube, the outer edges of the flanges thereof engage with the inner sides of the corners of the salient parts 11 of the flutes thereof, as shown in Figs. 1 and 5, thereby causing these radiating sections to be retained in a definite position with reference to each tube and insuring a uniform and symmetrical appearance of the radiator when viewed from either of its sides.

inasmuch as the inner sides of the corners of the radiating sections present a. comparatively small contact areav with adjacent companion radiating sections, it is desirable to provide means for holding thesev sections reliably in engagement with each other so that ,they will not become displaced and therefore preserve the general orderly appearance of the radiator. A simple means for accomplishing this purpose consists in striking out retaining lips or lugs 12 from the radiating flanges adjacent to the corners theref and bending the same laterally so that the retaining lip ofone radiating section engages with a flange of an adjacent radiating section and the severalY radiating sections thereby mutually support each other so that they remain in a properly centered position within the tube. v

After each tube has been thus provided with an internal radiating device, and the several groups have been assembled, the opposite'ends ofthe group of tubes and radiating means are dipped into solder so that the radiating means are secured to the tubes and the tubes lare secured to each other, thereby' completing the core ready to be assembled with the water headers or boxes, the inclos.

ing casing and other fittings vwhich go tQ make up a complete radiator.

A- radiator. thus constructed permits of using tubes of .much larger .diameter than those heretofore employed in similar types of `radiatorsand also permits of materially reducing the cost without sacricing efficiency or strength or detracting from the appearance of the radiator. l If at any time a tube of such a radiator should leak, this particular tube can be,` readily detached from the remaining tubes by unsolderingthe same and replacing it after 1t is repaired or replacing it with a new tube without disturbing any of the other tubes of the group. lf the use of the machine in Which the radiator `is employed will not permit of interruption long enough to lmalte this repair, the use of the radiator can still be continued by simply plugging the leaky tube at its opposite ends, thereby cutting the same out of use until an opportune time presents itself when such repair can be made to advantage. This ability to continue the use of a radiator even though the same springs a leak, is particularly advantageous in the case of farm tractors which often are used at a considerable distance from a place Where repairs can be advantageously effected and a considerable loss would be entailed if the machine and the attendants would be required to suspend operations until such repairs could be made.

I claim as my invention: j

1. A radiator core having a tube which is enlarged at its ends and contracted between its ends, and radiating means arranged within said tube and comprising a plurality of V-shaped sections each of which is bent out of a strip of sheetmetal to forni two flangesV which are connected at their. inner longitudinal edges to form a corner engaging the corresponding corners of adjacent' radiating sections, and lWhich has the outer longitudinal edge of each of its flanges provided with projecting edge portions which engage with the inner sides of the enlarged ends of the tube and an intermediate receding edge portion which engages with the inner side of the contracted part of said tube.

Q. A radiatorcore having a tube which is enlarged at its ends and contracted between its ends, and radiating means arranged within said tube and comprising a plurality of V-shaped sections each of. which is bent lout of a strip of sheet metal to form tvvo `flanges which are connected at their inner longitudinal edges to .formfa'corner engaging the corresponding corners of adjacent radiating sections and which has the outer longitudinal edges of its flanges engaging the bore of said tube, and said radiating sections being provided with retaininglips each of which projects laterally from a flange oit' one section into engagement with a flange of an adjacent section.


Copies of this patent may be obtained for )ive cents eaeh, by addressing the Commissioner of Vatents,

f Washington, D. (2.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2733908 *Oct 8, 1952Feb 7, 1956 Recuperatcmt tube tdsj
US4206738 *Mar 23, 1977Jun 10, 1980Maschinenfabrik Augsburg-Nurnberg AktiengesellschaftHeat exchanger
US5373895 *Apr 7, 1993Dec 20, 1994Nippondenso Co., Ltd.Heat exchanger
US7703506Apr 14, 2005Apr 27, 2010Modine Manufacturing CompanyExhaust heat exchanger
US20050230091 *Apr 14, 2005Oct 20, 2005Viktor BrostExhaust heat exchanger
US20100115771 *Nov 10, 2009May 13, 2010Mark JohnsonHeat exchanger, heat exchanger tubes and method
WO1986007628A1 *Jun 5, 1986Dec 31, 1986Blackstone Sweden AbHeat exchanger and method of making it
U.S. Classification165/148
Cooperative ClassificationF28D1/0358