0a. s, 194s. 2,408,909 o. BRUMMER ANHULAR FLUID slm. Filed June 24. 1944 ¿g3 //7 Äá7/ „ , Í Patented Oct. 8, 1946 2,408,909 ~ UNITED STATES PATENT OFFICE 2,408,909 ANNULAR, FLUID SEAL Olin Brummer, Oak Park, lll. Application June 24, 1944, Serial No. 541,870 3 Claims. (Cl. 286-11) - l This invention relates to annular fluid sealing means for relative rotatable parts especially such as shafts and their bearings in connection with pumps employed for the circulation of Water for automobile engine cooling purposes, and more particularly sealing devices of this type which do not seal directly on the-shaft itself. As is well known to those skilled in the art to which my invention relates, the sealing elements 2 »but showing the sealing means compressed, parts of the associated structure being shown in sec tion, together with a portion of the shaft which passes therethrough; Figure 4 is an enlarged fragmentary sectional view corresponding to one corner of the structure of Figure 2, that is the upper left-hand corner as shown in the view, enlarged for purposes of-` a more detailed description in accordance With are the parts which are most likely to fail in operation under variations from the normal which 10 the present invention; Figure 5 is an end view, again on the scale of are frequently likely to occur, particularly in mo Figures 2 and 3, of the rubber-like body of the tor vehicles where perfect operation under both sealing means; and normal and stress conditions is highly essential. Figure 6 is a side elevational view of said body Among other objects, the present invention aims 15 and :being the view thereof shown in Figure 1 with to provide such a seal which is markedly free from the metal spring omitted. objections to prior constructions, which can be readily placed in position quickly by inexperienced maintenance operatives without danger of being incorrectly inserted, and which has enhanced characteristics of longevity, sturdiness, and seal ing qualities. Referring in detail to the illustrative construc tion shown in the drawing, the numeral I0 may i. represent a portion of the engine block of an ln- - ternal combustion engine which may be jacketed as by the passage II therein for the circulation of a cooling fluid, such as, water or the like. The The invention will be exemplified as applied to pump casing I2 may be secured to engine block one illustrative form of water pump of an internal combustion engine and adapted to substantially 25 I0 as «by the usual bolts I3, only one of which is here shown, with the usual gasket I4 therebe yeliminate leakage of water from the water jacket tween, the pump casing having an orifice I5 which and its associate passages which might otherwise may communicate with the radiator of the power ñnd its way into the bearing of the pump drive plant. Extending through the pump casing I2 is shaft and not only cause loss of cooling fluid but a rotatable shaft I6 rotatable in a bearing mem result in destroying the lubrication of the shaft, this leakage prevention being accomplished while 30 :ber I1 carried by the casing. Secured on the shaft I6 to rotate therewith is the usual impeller at the same time permitting yielding movements I8 having blades I9 which revolve in an enlarge of the shaft either eccentrically or longitudinally ment 20 of the water-jacket passage II to cause without disturbing the sealing action, the seal the water to circulate therein from and to the readily contracting or expanding to accommodate itself to such movement, as well as Wear of the parts, without danger of distortion or failure. An important aspect of the present invention V radiator. The impeller I8 may be secured to shaft I6 as by a press fit of its hub I8a thereon. At the other end of the shaft I6 is secured, to ro`-tate with the shaft, a pulley 2| to take the drive belt of the pump. The pulley 2I may be secured degree of collapsibility while still being resilient and which is accomplished by a. novel combined 40 to the pump drive shaft I 6 also by a press flt of its hub 2 Ia thereon, as is well known in the art. telescoping and diaphragm action of the rubber is the provision of a seal device having a high like part. So as to prevent or at least minimize the en trance of water into the .bearing surface between These and other objects of the invention will the shaft I6 and its bearing member I'I, an annu more fully appear from the following specifica tion, taken together with the accompanying draw 45 lar seal indicated generally by the numeral 22 is provided, the seal in this instance seating at ing, in which one end against the surface 23 of the impeller Figure 1 is a sectional view through an illus hub I8a, and at its other end against the usual trative pump construction showing in elevation friction disk or washer 24 which may be of carbon my improved sealing means associated there 50 or of a phenolic condensation material impreg with; nated with graphite or other self-lubricating sub Figure 2 is an axial sectional view through my stance, as is well known and need not be here improved sealing means shown in Figure 1, the further described. In this instance the Washer sealing means being uncompressed; ,24 is keyed to the impeller I8 as by radial tongues Figure 3 is a view somewhat similar to Figure 2 55 25 on the washer which are received in slots 26 2,408,909 4 this corner, as clearly shown in my drawing. is a square, sharp corner, and similarly, the corner in the impeller, the impeller I9, seal 22, and washer 24, thus all rotating with the shaft I3. 'I‘he coil spring 21 is inserted between the enlarged face ends of the seal 22 and tends to expand the seal axially, while, through the intermediation of the seal, pressing the washer.“ against the cylindrical portion 28 of the pump casing I2 which carries the bearing I1. Since the seal 22 and its 'associated spring 21 are normally maintained un der some compression at all times (this being 10 effected by the initial press-ñt assembly of the pulley 2| with the shaft I6), the seal 22 thus Í closes oil’ the space between the washer 24 and the impeller surface 23 while the rotative close frictional abutment of the washer 24 with the 15 portion 29 seals this point and prevents water from reaching the bearing I1. To prevent acci C1. dental disengagements of part.. just described between 33 and 29 is square and sharp, thus in creasing the thickness of the material at these _ corners. When, now, the-seal is further compressed, as for example, by an axial movement of the shaft I6 toward the left in Figure l under stresses of operation of the pump, the smaller space afforded for the seal between the washer 24 and the im peller surface 23 is accommodated not only by compression of the spring 21 but also by con traction of the seal 22 somewhat as indicated in Figure 3, the connecting parts 3| of the seal body ñexing axially with the axial movement toward each other of the face parts 30, and the tube part 29 remaining relatively uncompressed. Con versely, when the shaft |6 moves to the right in Figure l and more space is afforded between the from the impeller, a removable spring ring 25b washer 24 andthe impeller` surface 23, the seal is seated in a groove 25a in the impeller ilngers 20 body tends to return under its own resilience (as |9b which however does not interfere with ex well as the action of the spring 21) to the posi pansion and contraction of the seal in use. tion indicated in Figure 2 in which the portions The present invention being directed to im 32 and 33 of the connecting part 3| are again provements in the seal 22, attention will now be at right angles, instead of forming an acute angle directed in detail to the latter, which in accord 25 as in the compressed position indicated in Fig ance with the present invention, comprises an ure 3. k. annular body 22a of ilexible, resilient rubber-like In the expansion of the seal to accommodate a or elastic material (for example, natural rubber larger space therefor as last indicated, the coil or preferably a synthetic elastomer of which sev spring 21 of course assists in a speeded and cer eral are now on the market) which does not 30 tain return of the seal body to expanded posi deteriorate or lose its elastic properties due to tion, the spring 21 bearing against the inner heat, cold, moisture or the material with which laces of the face parts 30 of the seal body and it comes in contact and which may be cast or tending to press these apart while leaving the molded, in a manner well known to the art and tube 29 of the seal entirely free of the spring and 35 which need not be here described, to the form connected to the face parts only by the flexible here shown, for example, following the present but resilient and elastic connecting parts 3 I. The invention. spring 21 is advantageously centered by the As here shown, the body 22a of the seal 22 is shoulder provided between the parts 30 and 32. reel-like in form and comprises a sleeve or tube In both contraction and expansion of the seal, part 29 which is located centrally of the seal, a the flange-like radially ‘extending annular por face part 3U in'this instance at each end of the tion 33 of the seal body 22a desirably acts some seal, and a connecting part 3| between and what as a diaphragm responding rapidly and pos connecting the tube partvand the face parts, the _ itively to the required movements. face parts being of larger diameter than the tube So constructed and arranged each face part part, and the connecting parts of reduced diam eter with respect to the face parts but again of larger diameter than the tube part. o 30 presents to the element which it abuts, as for example, the washer 24 or impeller surface 23, an annular area 34, as best shown in Figure 5. As best shown in Figure 4, the connecting part which is of larger diameter, both for its internal 3| is of angular cross-section comprising a cylin and external diameter, than the tube part 29, and drical axially extending portion 32 energing from 50 it is against this area 34 which the spring presses, the face part and co-axial with the tube part 29 the ñnal coils of the spring at each end being and an annular radially extending flange-like also in the form of an annulus and desirably portion 33 'in a plane transverse to the axis of ñattened as at 21a where it presses against the the tube and merging into the tube part. Fur face part 30 as at 30a. thermore, the tube part 29, as best seen in Figure The spring 21 presses the face part 39 against 4 is of a cross-sectional wall thickness mate the element with which it abuts desirably through rially greater than that of the cross-sectional the intermediation of concentrically annular ribs wall thickness of the connecting part 3|. In ex 35 and 36 on the annular area 34, thus providing pansion and contraction of the seal, the face a suction grove therebetween and enhancing the parts, while remaining substantially parallel, 60 sealing effect of the body to effect a fluid-tight move with the connecting parts which tend to seal. The body 22a is thus counterbored as at 31 pivot so to speak where the latter merge into the and the effective cooperation between the spring tube part as at 29h. The cross-sectional thick 21 and the body 22a and between the latter and ness of the face part 39 is preferably somewhat , the element against which it abuts, such as the O Gl greater than that of the connecting part 3| but washer 24 or impeller surface 23 is enhanced, the slightly less than that of the Atube part 29. For sealing action taking place adjacent the periph example, following the present invention, the ery of the seal where it is most effective. cross-sectional thicknesses of these respective The tube part 29 of the seal body may thus parts are advantageously, say, as follows: .050 of encircle the shaft i6 < as indicated in Figure 3 at 70 an inch for the face part, .030 of an inch for the 29a where is provided a bore for the shaft) at all connecting part, and .065 of an inch for the tube times during both expansion or contraction of part, substantially as illustrated in Figure 4, at the seal and remaining relatively undistorted “A,” “B” and “C” respectively. The distance from its substantially tubular form throughout across the corner at the junction between 32 and 33 is proportionally greater than .030 inch, since 75 the operation of the seal in any normal expansion 2,408,909 or contraction thereof, telescoping into the coun terbores 31 at each end during compression of the seal, while free to flex when required. I have found that a seal constructed in ac cordance with this invention has marked eil'ec tiveness and freedom from failure over indefi nite periods of operation and under both normal and abnormal conditions. 'I'he thickened tube part for the seal tends to stabilize its structure and operation, while the connecting parts oi' sharply angular cross-section permit the face part of the seal and the tube part of the seal to act independently, each performing its respective functions without interference from the other, said ñexing movements, and further diametri cally enlarged annular face-parts extending radi ally outwardly from the axial extensions respec tively, said ilange portions extending outwardly a suiliclent distance and said axial extensions be ing of suñlcient internal diameter whereby the tubular part telescopes at each end into said counterbores during compression of the seal. 2.~ An annular fluid seal comprising a body of rubber-like material having a central tubular part, annular diaphragm-like flange portions ex tending radially outwardly from each end respec tively of said tubular part, the tubular part these functions being in each case materially 15 having a wall of substantially uniform cross-sec tion oi' a thickness approximately twice the cross diil'erent, while all at the same time cooperating sectional thickness of said flange portions, said in enhanced improvement in results of the seal as a whole. flange portions flexing axially toward and away from each other pivoting on said tubular part It is to be understood that the function of the in compression and expansion of the device, a tube part 29 does not depend on any sealing ac 20 cylindrical axial extension of each said ilange tion between the tube part and the shaft at 29a portion extending axially outwardly of the flange but that this is largely by way of stabilizing of portions at each end, said cylindrical axial ex~ the seal. tensions also moving axially toward and away 'I'he connecting part 3| is flexible and some what elastic but not so flexible or elastic as 'to 25 from each other with movement of said flange portions, said flange portions and axial exten be inert but on the contrary has substantial re sions forming a counterbore at each end of the silience so as to cooperate in returning the face seal, the corner between each flange portion and parts to extended position, so that the seal of the its respective axial extension being substantially present invention does not rely entirely or even square and sharp whereby the cross-sectional to any principal degree upon the spring 21 to 30 thickness diagonally across said corner is greater cause 1t to expand when it is permitted to do so than the cross-sectional thickness of said ilange to take up a, greater space afforded and to main portion, and further diametrically enlarged an tain the effectiveness of the seal. nular face parts extending radially outwardly In the present invention in which there is a progressive reduction oi' the diameter of the seal 35 from the axial extensions respectively, said flange from the face part, through the connecting part, to the tube part, radial expansion of the parts portions extending outwardly a suiïlcient dis tance and said cylindrical extensions being oi’ suilicient internal diameter whereby the tubular is substantially eliminated and the axial move part telescopes at each end into said counter ments of the parts is in complete harmony and bores during compression of the- device. consonance with the axial movement of the shaft 40 3. An annular fluid seal device comprising, a and the axial movements of the cooperating body of rubber-like material having a central spring, thus preventing slight variations in the tubular part of substantially uniform wall cross molding of the seal from ail'ecting its operation. section, annular diaphragm-like flange portions Moreover, since the parts are not intended to extending radially outwardly from each end re fold upon each other, the effects of sediment or spectively of said tubular part, said ñange por grit in the water upon the seal are obviated, and tions iiexing axially toward and away from each the moving parts of the seal are at all times clear other on said tubular part in compression and of each other. expansion of the device, a, cylindrical axial exten 'I'he invention is capable of such embodiments sion of each said flange portion extending axially as fall within the scope of the appended claims. 50 outwardly of the flange portions at each end, Having described my invention, I claim: 1. An annular ñuid seal comprising a body of rubber-like material having a central tubular said cylindrical axial extensions also moving axi ally toward and away from each other with movement oi' said flange portions, said flange por part, annular diaphragm-like flange portions ex tions and axial extensions forming a counter tending radially outwardly i'rom each end respec 55 bore at each end of the device, the corner be tively oi.' said tubular part, said flange portions tween each‘ñange portion and its respective iiexing axially toward and away from each other axial extension being substantially square and pivoting on said tubular part in compression and sharp whereby the cross-sectional thickness diag expansion of the seal, a cylindrical axial exten onally across said corner is greater than the sion of each said flange portion extending axi 60 cross-sectional thickness of said ñange portion, ally outwardly of the flange portions at each and further diametrically enlarged annular face end, said axial extensions moving axially to parts extending radially outwardly from the axial extensions respectively. said flange portions ex of said flange portions, said flange portions and tending outwardly a sufficient distance and said axial extensions forming a counterbore at each 65 cylindrical extensions being of suflicient internal end of the seal, the corner between each flange diameter whereby the tubular part telescopes at portion and its respective axial extension being each end into said counterbores during compres ward and away from each other with movement suiliciently sharp whereby the ilange portions maintain substantially flange form throughout sion of the device. OLIN BRUMMER.