Патент USA US2109614код для вставки
March 1, 1938. r w_ R DEHUFF 2,109,614 MIXING MACHINE BEATER ' Filed April 11, 1936 13-“ .13 ' 12.4 Z2 2 Sheets-Sheet 1 ZZQ 12 ' I74 ' INVEN'I? , BY 1 ' .- ATTORNEY , 1 March 1, w_ F_ DEHUFF 2,109,614 MIXING MACHINE BEATER Filed Ap '1 11, 1955 2 Sheets-Sheet 2 Z6 f l 22 ' 29 ,20. 24 J5 INVENTOR “ m9 / / f n/ / L / ‘I / ATTORNEY Patented Mar. 1, 1938 2,109,614 UNITED STATES PATENT OFFICE 2,109,614 MIXING MACHINE BEATER Walter F. Dehuff, Glen Rock, Pa., assignor to American Machine & Foundry Company, a cor poration of New Jersey Application April 11, 1936, Serial No. 73,853 16 Claims. (Cl. 25—129) ’ This invention relates to machines for mixing dough, and more particularly to the beaters of such machines. This application constitutes a continuation in part of my prior application, 5 Serial No. 749,302, ?led October 20, 1934, which has matured into Patent No. 2,037,068 granted April 4, 1936. In conventional beaters heretofore in use it has been found that the arms leading from the outer edge of the beater to the center hub, re volving at the necessary speed for the type of batch on which this type of beater is required, prevent the material from dropping back, due to the speed of these arms, thus causing the top 15 portion of the batch to be somewhat held in sus pension, thereby preventing that portion of the batch from working down into the rest of the batch to a marked degree. This, of necessity, results in a more or less unsatisfactory and slow 20 er mix. I have found however, that by constructing the beaters with a drop center and eliminating the standard heavy bar sloping downward from the beater shank as in previous beaters, which had 25 the tendency to trap the material at the center of the batch and keep it ?owing on the top of the batch being mixed, the material as it be comes lighter and rises towards the top, is direct— ed downward by the improved drop center struc 30 ture, and is permitted to fold over, and down into the batch. This effects a more thorough mix of the batch because of the additional agi tation, and hence it has a more complete develop ment and incorporation of materials from top 35 to bottom of the batch. The drop center con struction also eliminates practically all tendency of the material to splash, or be thrown off 'the heater and permits the batch to be handled with a degree of efficiency hitherto unknown in the 40 art. In some instances, I have found that certain materials are more dif?cult to incorporate due to differences in their speci?c gravity, or when dry materials ?oat on liquids. To eifect a rapid as 45 sociation of such mixes the drop center beaters the points of the drop center wings A and B (see Fig. 1). Beaters of this type are generally used when they are to be revolved at relatively low speeds to incorporate the ingredients rapidly. The effect of the inner drop center or spur is to give added downward directive impulse to parts of the batch tending to rise as the beater revolves. The main object of the invention is to‘ secure a more thorough mixing of the dough, or mix, and for this purpose there is provided a beater 10 head having a drop center construction of gen erally heart shaped section, the driving shank being joined to the re-entrant portion of the heart. It is a further object to provide beaters of drop 15 center construction with inner drop center por tions, or spurs or extensions in order to more thoroughly and rapidly mix certain types of batches, wherein said portions aid in the down ward direction and agitation of said batch. It is an additional object to provide a multi ple winged beater with an inner drop center por-' tion which will effect a more thorough, efficient and rapid mix, It is an added object to provide the operative 5 faces of beaters with such a con?guration that the heater in operation will be self cleaning, that is, the rotation of the beater will cause parts of the batch tending to adhere thereto to be re moved by the rotation of the beater, without the 30 assistance of additional cleaning means. With these and other objects not speci?cally mentioned in view, the invention consists in cer tain constructions and combinations hereinafter fully described, and then speci?cally set forth 35 in the claims appended hereunto. In the accompanying drawings which form a part of this speci?cation and in which like char acters of‘ reference indicate the same or like parts: Fig. 1 is a side elevation of the improved beat er used for heavy batches; 40 Fig. 2 is a sectional plan view taken on line 2—2 of the beater shown in Fig. 1; the arrows at the end of the line indicating the direction in 45 have been provided, according to the present in which the view is taken; vention, with an inner drop center portion or spur which is either formed integral with the particular beater or affixed thereto. These de— beater used for lighter mixes; and Fig. 3 is a side elevation of a multiple win I Fig. 4 is a plan view of parts broken away of 50 vices assist materially in the assimilation of dry ~ the structure shown in Fig. 3. materials and hasten the mixing process. The In carrying the invention into effect there is hastening of the mixing process is particularly provided a driving shank and a generally heart noticeable on some batches more than others, shaped beater head supported with its obtuse and is readily discernible on all batches of such end downward and adapted to create a circula 55 capacity that level off the batch up to or above tion of the mix down through the center of the _ 55 2 2,109,614. head when the same is rotated in the mix. In tions A’ and B’ as illustrated in Fig. 3, and cause the mix to ?ow up the outside and down the and outwardly inclined bars on the shank, a cen tral web forming drop center continuation of center of the beater producing rapid circulation and thorough development. Flour and other in the shank, two or more sets of curved members or blades joining the bars and web and spurs gredients added to the mix are assimilated almost instantly. By means of the inner drop center or inner drop center members spaced above and substantially parallel to said inclined bars ex 10 tending from said shank and connected at their ends to said bars; or the beater head may in clude a number of radial arms on the driving shank, a series of generally heart shaped mem bers secured to the arms with double drop cen 15 ter portions in their upper parts, and wire whips having their ends ?xed in the frames. These various means and parts may be widely varied in construction within the scope of'the claims, for the particular devices selected to il 20 lustrate the invention are merely illustrative of the many possible concrete ‘embodiments of the same. The invention, therefore, is not to be re stricted to the speci?c constructions shown and ~ 25 30 portion having wings B’ any materials rising above the level of wings A’ are immediately tucked in, and folded or redirected down the cen 10 ter of the beater. Reinforcing bars l9 are pro vided for the upper portions of each frame. Frames I'I are equipped with a series of wire ' whip members 20 which have their ends securely fastened therein. A central rod 2! set in the 15 lower end of shank l5 forms a drop center con-' tinuation thereof. Referring again to Fig. 3, it will be seen that only the frame I8 and wires 20 of one wing set is shown inasmuch as it would result in a confusion of lines if the wires of the 20 remaining wings were illustrated. " What is claimed is: 1. In a beater, the combination with a driving shank providing means for rotating said beater described. .The beater illustrated in Figs. 1 and 2 is used in a mix, of a beater head of generally heart mostly for creaming, mixing and folding-in ?our in batches of all kinds. Referring to Figs. 1 and shape con?guration having a drop ‘center portion in its top part supported by said shank with its end pointing downward, an inner drop center unit spaced above said drop center and secured to said shank, and a plurality of separated mix ing members extending between said top part 2, the beater consists of a driving shank [0 which is adapted to be connected to the driving spindle of the mixing machine, and a beater head of generally heart shaped section integral with or attached to said shank. In the embodiment shown in Figs. 1 and 2, the beater head consists ~ of two upwardly inclined top bars ll extending 35 and 23, which extend out and form wing por the best constructions contemplated, the beater head may include a pair of opposite upwardly from driving shank l0 and connected by one or more spaced inner curved members l2 and outer curved members l3, all of which may be concen trio, as shown, with a central web M which forms a drop center continuation of shank ID. Spaced above bars I l and extending upward substantially parallel thereto are short bars H a which are connected at their ends by bars l5 attached to or integral with bars ll, thereby forming an upper drop center unit having a wing portion B 45 which corresponds to wing portions A of the main part of the beater, the highest points of which constitutes the beginning of the drop cen ters in the top of each beater head. Referring particularly to Fig. 2, it will be noted 50 that the cross section of each of the members l2 and I3 presents a broad curved point to the mix which tapers off at the rear thereof. This shape which may approximate a tear drop causes more e?icient agitation of the mix and makes the 55 blades of the beater self cleaning, so that at all times there is no collecting of the ingredients of the mix thereon during use ornecessity for scrap ing or otherwise removing portions of the mix therefrom after use. It will be noted that the 60 blades on opposite sides of web “I face in oppo site directions, so as always to present the broad face ?rst to the mix as the beater rotates. In Figs. 3 and ll there is shown a modi?ed form of the invention specially adapted for light mixes, 65 such for instance as sponge batches, heavy icings and the like. The beater shown in this ?gure 25 and end for agitating a mix when said beater is allowed to rotate therein. ' 2. In a beater, the combination with a driving shank providing means for rotating said beater in 35 a mix, of a beater head of generally heart shape con?guration, having an obtuse end and a drop center portion across its top part acting to direct portions of the mix downward into circulation in said mix, an inner drop center unit integral with 40 the top part of said beater secured to said shank, for directing downward into the mix any portions thereof rising above said'drop center, and a plu rality of mixing members carried by said head for agitating a mix when said beater is allowed to 45 rotate therein. 3. In a beater, the combination with’ a driving shank providing means for rotating said beater in a mix, of a beater head of generally heart shape con?guration, having an obtuse end por tion pointing downward, and a drop center por tion across its top part acting to direct portions of the mix downward into circulation with the mix, an inner drop center unit supported on the top part of said beater head and secured to said 55 shank for directing back into the mix any parts thereof rising above said drop center, and a plu rality of mixing members carried by said head for agitating said mix when said beater is allowed to 60 rotate therein. 4. In a beater, the combination with a driving shank provided with means for rotating a beater in a mix, of a beater head having an outer mem ber of generally heart shape con?guration, and a drop center depression in the top portion there 65 of supported by said shank at the lowest point comprises a multiple wing unit, and though of said depression, the sides of the beater ex shown with six wings, it can be modi?ed to any number of wings, as conditions require. In this beater there is provided a driving shank l8 from which extend a number of upwardly inclined radial U-shaped arms I‘! supporting the ends of tending upward from said drop center depres sion, and then downward to form an obtuse end, and a plurality of concentric agitating devices 70 a series of generally heart-shaped frames l8, each frame being provided with-a plurality of 75 drop center portions designated'generally at 22 forming parts of said ‘head, and having their ends secured to said member only and on oppo ‘site sides of its vertical center‘ line for agitating said mix when said beater is allowed to rotate therein. 2,109,614 5. In a beater, the combination with a driving shank provided with means for rotating a beater in a mix, of a beater head having a plurality of members of generally heart shape con?guration, with each member provided with a drop center depression in the top portion thereof supported by said shank at the lowest point of said depression, the sides of the beater members extending up ward from said support, and then downward to form obtuse ends all converging at the same point, and aplurality of concentric agitating devices forming parts of said head, and having their ends secured to said members and on opposite sides of the vertical axis of each member for agitating 15 a mix when said beater is allowed to rotate therein. 6. In a beater, the combination with a shank provided with means for rotating a beater in a mix, of a composite beater comprising a plurality 20 of members of generally heart shape con?gura tion and having drop center depressions in the top portion of each member, said members ex tending upward from said drop center depres sions, and extending downward to form obtuse 25 ends, all of said members being secured together at the top and ends, and supported by said shank at the lowest point of said depression, and a plu rality of concentric agitating members having their ends attached to said members only, and on 30 opposite sides of the vertical axis of said beater, for agitating a mix when said beater is allowed to rotate therein. 7. In a beater, the combination with a shank provided with means for rotating 2. beater in a 35 mix, of a composite beater comprising a plurality of members of generally heart shape con?gura tion and having a plurality of drop center de pressions in the top portion of each member for directing and redirecting the mix downward to~ wards the center of said beater, said members extending upward from said drop center, and extending downward to form obtuse ends, all of said members being secured together at the top and ends, and supported by said shank at the 45 lowest point of said depression, and a plurality of concentric agitating members having their ends attached to said members only, and on opposite sides of the vertical axis of said beater, for agitating a mix when said beater is allowed to rotate therein. 8. In a beater, the combination with a driving shank providing means for rotating said beater in a mix, of a beater head having a drop center depression across its widest part, supported by said shank with its nose portion pointed down ward, a plurality of separated mixing members extending between said drop center and said nose portions, and a second drop center member at tached to the upper portion of said beater and 60 to said shank. 9. In a beater, the combination with a driving shank providing means for rotating said beater in a mix, of a beater head, comprising an outer member of generally heart shape con?guration ~ with a drop center depression in the top portion thereof supported by said shank, a plurality of mixing elements carried by said member, and means supported by the upper portion of said member adjacent the drop center portion thereof and attached to said shank for directing those portions of the mix rising above said member downward into said mix to be circulated there with. 10. In a beater, the combination with a driving 75 shank, of a heart shape beater head supported 3 thereon with its obtuse end pointed downward, said beater head including a pair of opposite upwardly inclined bars on said shank, a central web forming a drop center continuation of said shank, and adapted to produce cavitation in and thereby create a circulation of the mix from the outside of the beater head down through the center of the head when the same is rotated in the mix, a plurality of sets of spaced, concentric members joining said bars and webs, to assure 10 effective agitation of said mix, and means mount- . ed on said bars and secured to said shank above said bars for downwardly directing into the cir culating mix any material rising above said bars. 11. In a beater, the combination with a driving shank providing means for rotating a beater in a mix, of a beater of generally heart shape con ?guration, comprising a pair of opposite upward ly inclined bars extending from said shank, a central .web forming a drop center continuation 20 of said shank, a plurality of spaced concentric members joining said bars and web to assure the effective agitation of said mix, a pair of up wardly inclined elements extending from said shank and. spaced above said bars, and means 25 connecting said elements to said inclined bars, and thereby forming an inner drop center unit on said beater for redirecting portions of the mix rising above said bars downward and into cir culation with the mix being agitated. 30 12. A beater rotor including a shaft and a blade extending therefrom and revoluble there with broadside through the mix, said blade hav ing a plurality of stirring elements extending side by side transversely of their orbital path with intervening arcuate slots, said stirring elements 35 being connected and said slots being closed, at their respective upper ends, by a drop center ele ment, the stirring elements extending downward from said drop center in arcuate formation re spectively to an axially disposed element, with 40 which the stirring elements are connected at spaced points along the axis; said stirring ele ments respectively having a cross section gen erally of tear-drop shape constructed with 45 ing edge and arranged to agitate the ingredients tapered trailing edges and a blunt rounded lead of a mix as the beater is rotated therein blunt edges foremost; whereby the mix is squeezed into the spaces between said blunt leading edges recurrently, and alternately expands in the spaces 50 de?ned by said tapered trailing edges forming admixed streams which cohere as they leave the trailing V-shaped ends of the elements so that a freshly coherent mass of the mix is presented for like dividing, squeezing and cohering action at 55 each pass of a blade so constituted. 13. In a beater, a rotor having a vertical axis, and including several blades each having the features claimed in claim 12, said blades being 60 disposed in spaced radial positions around said axis, whereby said mix is subjected, during each rotation of said rotor, to a multiplicity of divid ing and squeezing operations, with intervening recoherence of the divided streams. 14. A beater blade having the features claimed 65 in claim 12, in which each stirring element has its blunt rounded leading edge and its tapered trailing end formed substantially in the propor tions illustrated, thereby promoting a self-clean 70 ing action of said elements. 15. A beater device adapted to operate in a plastic mix of the class described: said beater comprising a shaft disposed suitably to enter said mix from above the surface level thereof and to 75 4 2,109,614 rotate therein, and a beater member having up per and lower drop center elements adapted to act in succession in the order named to lay cir cumjacent portions of said mix progressively 5 into the path of normal downward vortex prop agation along the axis of rotation of said beater, whereby said mix is cleared from the beater dur ing the mixing operation. 16. A beater having the features claimed in claim 15 in which said‘ drop center elements have their upper margins extended downwardly and inwardly to a point of connection with said shaft, and ‘in which said beater element is continued below the terminus of said shaft as a generally planiform foraminous stirring structure of sub stantially heart-shaped contour extending in a plane intersecting the axis of said shaft, in par allelism therewith, said extended portion acting to impart to the material so cleared from above, a moment of centrifugal force adequate to feed it into the path of the foraminous stirring por 10 tion of the beater. . WALTER F. DEHUFF.