US2387159A - Mining machine - Google Patents

Description

Oct. 16, 1945. A. L. LEE

MINING MACHINE Filed Nov. 4, 1943 4 Sheets-Sheet 1 /N\/EN7'0/ AETHUE L. LEE,

0st. 16, 1945. A. L LEE MINING MACHINE Filed Nov. 4, 1943 4 Sheets-Sheet 2 //v vE/ /To/e AETHUR L. LEE,

-W NBY I I m ATTY @d. 16, 1945. LEE 2,387,159

MINING MACHINE Filed Nov. 4, 1943 4 Sh'eets-Sheet 3 I ///VE/\/7'OE: ARTHUR L LEE,

Oct. 16, 1945.

Filed Nov. 4, 1943 4 Sheets-Sheet 4 7 D m .i I m 1/. 5 [Ill 0 {M W O I 1 A J 1/ 1/ J r m mu m M rm L Q l 4/ m A v 5 8 O O I o\ m I/NVENTOE: ARTHUR L. LEE, BY 71M;

HTTQ

Patented Oct. 16, 1945 MINING MACHINE Arthur L. Lee, Upper Arlington, Ohio, assignor to The Jeffrey Manufacturing Company, a corporation of Ohio Application November 4, 1943, Serial No. 508.929

10 Claims.

This invention relates to a mining machine.

An object of the invention is to provide a kerf cutting type mining machine with improved mounting preferably involving pneumatic tired wheels for propelling and steering the mining machine.

Another object of the invention is to provide improved drive earing for traction means of a mining machine.

A further object of the invention is to provide an improved relation of parts in a mining machine involving traction wheels in which the traction wheels, at least on one side, are within the lateral dimensions or confines of the mining machine main frame.

Another object of the invention is to provide an improved steering wheel construction for a mining machine.

Still another object of the invention is to pro vide an improved drive gearing involving particularly differential drive mechanism for a mining machine or like vehicle.

Other objects of the invention will appear hereinafter, the novel features and combinations being set forth in the appended claims.

In the accompanying drawings,

Fig. 1 is a plan view of a mining machine incorporating the features of my invention;

Fig; 2 is a side elevational view of the machine of Fig. 1;

Fig. 3 is a sectional elevational view through the dual traction wheels and associated parts on one side of the mining machine, taken along line 3-3 of Fig. 2;

Fig. 4 is a sectional elevational view taken on the line 4-4 of Fig. 2 looking in the direction of the arrows;

Fig. 5 is a sectional elevational view taken on the line 5-5 of Fig. ,1 looking in the direction of the arrows; and

Fig. 6 is a sectional view taken on the line 6-6 of Fig. 1 looking in the direction of the arrows with certain parts shown in elevation rather than in section in the interest of clearness.

The mining machine herein disclosed is a modification of, and improvement on that disclosed in the patent to R. K. Jefirey et al., 2,263,779,'for a Mining machine, dated November 25, 1941.

Briefly described, the mining machine includes" a main frame It adjacent the forward end of which there is a turntable H which is mounted for swinging movement about an upright axis and which is swung by a pair of hydraulic piston motors i2, the cylinders of which are formed as an integral part of the main frame ill.

Mounted on the turntable II and pivotally attached to the rear thereof on a horizontal axis is a supplemental frame l3 which carries an electric motor H for driving the chain of the cutter mechanism, as hereinafter described.

Formed as an integral part of the supplemental frame 13 is a downwardly extending elongated neck I5 upon which a turnover head I6 is mounted, said head 16 being adjustable about the axis of the neck l5 and also being pivotally mounted on said neck l5 for adjustment along a transverse axis which is parallel to the plane of a forwardly extending cutter bar I! which is supported by the turnover head I8 for swinging movement about an axis which is at right angles to the plane of the said cutter bar II.

The swinging movement of the cutter bar l1 about the two axes above described, which are at right angles to each other, is provided by virtue of hydraulic piston motors |8, as to the said parallel axis; and l9, ID as to the said right angle axis. The cutter bar I! carries an endless cutter chain 20 provided with appropriate cutter bits. Said chain 20 is driven through drive mechanism from the motor M, as disclosed in detail in the abovementioned patent to R. K. Jeffrey,

et a1.

Swinging movement of the supplemental frame [3 about its rear pivotal axis provided by the pivots 2| is provided by a pair of spaced hydraulic piston motors 22, 22. All of the piston motors above described are preferably of the double acting typ The above mentioned patent to R. K. Jeffrey et a1. discloses a machine adapted to operate on the rails of a mine track. This machine has been modified in ,a number of important particulars and is so constructed as to be mounted on pneumatic tires and many of the features of my invention relate to construction which provides for this difference in operation.

Attention is directed now particularly to Figs. 1, 2 and 3' of the drawings and to the construction of the front dual traction wheels which support and propel the mining machine. Ex-

. tending downwardly from the top plate of the main frame Ill and forming a part of the main frame is a central bracket 23 (see Fig. 3) which is attached by machine screws to integral portions of the main frame I 0. The bottom of the bracket 23 is provided with an integrally formed shaft receiving pipe 24 which is welded to the vertical members of the said bracket- 23. Extending through the pipe 24 is a shaft 25 which is held in the pipe 24 against longitudinal movement of the shaft 25 is similar that on one and alone will be descrlbed'in detail.

Each outer end of the shaft 25 supports a dual wheel designated generally by the reference character 2'1 and each dual wheel Elincludes an elongated hub 28 which is journaled on the spindle of the shaft 25 by spaced anti-friction roller bearings 29 and .30. The hub 28 is removablyheld on the spindle oi the shaft 25 by nut and washer assembly 3!. The hub 28 is provided with a removable hub cap 32. 28 is a pair of spaced split rims 33 and 34, the former being the inner rim and the latter the outer rim. Rims 33 and 3,4 are provided with pneumatic tires 35 and 36, ;respectively. 3%! is removably supported on the hub 28b an inner integral clamping ring 31; andone clamp:-

Mounted upon the hub assmeo by a bolt 28. Since the structure on each end which constitutes another feature of my invention.

Attention is particularly directed to Fig. 4 oi the drawings and to the structure of this differential drive mechanism. The difierential mechanism indicated at 88 is removably attached as a unit to the main frame In of the mining inachine and it includes a stationary diiferential frame 49 formed of two parts which are removably attached by a plurality of spaced machine .screws 513.

' tion differential cage and housing 53 whichis log surface of a double clamping; ring 38 which is slidable over the hub 28 and is preferably split along one radial plane to permitit to contract'under clamping pressure and have a tight fitlon the hub 28, The outer r'izn'fic is clamped between the other clamping surfaceof the ring 3? and a removable outer clamping ring 39 which is removably attached-to the hub 28 by'a plural ity of spaced lugs l0. The inner end of the hub 28 is provided with an integral extension 4i upon which a drive sprocket or gear 612 is attached as l t Innate.- A greaseseal i3 is provided between extension El and a' stationar'y grease seal ring 44 which has a" tight lit with the shaft 25 and is adjacen'tthe shoulder thereon and the inner'race formed intwo parts, which parts are connected together by elongated bolts 5% which also attach a ring gear or sprocket .55 to the diiierentlal cage or housing 53 which-acts as a driving gear or sprocket therefor. In the centralportion of the difierential cage 53 is a pair of diiierentiai bevel gears 58 and 51 which mesh with opposite sides of a bevel gear 58 which is mounted on a pin 59 carried by the cage 53. This, of course, provides for the differential driving of individually splined drive shafts Stand 6| which have a splined.

connectionwith the bevel gears 56 and 51, respectively. Each of the shafts 60 and BI is provided with s, rigidly attached hub 62. Welded to each hub 62 is a plurality of pins 63 which extend of'the bearing 39. This provides a grease tight I enclosure within the hollow portion of the hub 28 to provide a grease chamber, insuring proper lubrication of the bearings 29 andSIl.

It is to be particularly noted; that since the sprocket or gear-42 is on the inner end of the hub 28,-each of the rims 38 and 3d and their associated tires may be readily removed by the simple expedient of removing the lugs ill.

It may be further pointed out'that the extension l! is provided with a drip ring 45 which is formed integral-therewith and which provides a groove between it and the sprocket i 'which will catch oil from the chain associated with the sprocket 42 and drip it back onto the chain.

One of the problems which was encountered to provide the dual pneumatic tired wheels for the mining machine was that of providing adequate tire support for the mining machine, particularly at its forward end where the weight is largely concentrated, and still not extend the traction means appreciably beyond the lateral confines of the main frame. By reference to Fig. l of the drawings it will be'noted that the outermost tir .36 does not extend laterally beyond the main frame as represented by the integrel piston motors i2 and the other tire 3% on the opposite side of the machine will extend a like distance from the longitudinal center line of the forward part of said main frame it. In otherwords, the two front traction dual wheel assemblies 27 are symmetrical with respect to the longitudinal axis of the main frame 663. It maybe stated that the mounting of the sprocket or gear :32 on the inner end of the hub 28 contributes to this construction.

Each of the dual wheel assemblies 2! is separately dn'ven'in the sense that'they may have individual independent movement and to this end each of the sprockets i2 is driven by a chain 56 froman individual sprocket a? (see Fig. 4) of a differential drive mechanism, the structure of into and have a loose driving fit with a plurality of holes in a hub of the previously mentioned sprocket or gear l! which is the driven gearinsofar as the differential mechanism'tfl is concorned. This provides a flexible coupling between each shaft 60, 6! and associated hub 64.

' \Also formed as an integral part of each hub 53 is a brake drum 65 with which a brake mechanism $6 is associated. The brake mechanisms for the dual wheels 27 on opposite sides of the vehicle are independently operable by independent brake levers 61 (see Fig. 2) adjacent the operator's station at the rear end of the machine. It is'to be' noted that each of the hubs 64 is journaled on the outer end of the diiferential cage or housing 53 and as a consequence the pulling force of the chain 36 is not transmitted to the shaft 50 but is taken directly by this cage or housing 53. As a consequence, the shafts so and El are purely torque transmitting shafts;

It is further to be noted that in the absence of any diiierential action or, in other words, when each of the dual wheels 2? is travelingat the same speed as when the machine is moving in a straight line, the hubs 8 3 and sprockets or drive gears 37. will not have any relative rotation with respect to the cage extensions or outer parts upon which they are journaled since the cage 53 will rotate as a unit with said sprockets or gears 4'1. However, where there is difierential action involved and one of the dual wheels 21 rotates at a difierent rate than the other there will be some slight rotation of the hubs 86 on their journals and thus with respect to the outer portions or extensions of the cage or housing 53. These journals, which are seen at 68, may be free-fioating or they may be keyed to the hubs 65 as illustrated. "it is to be furthernoted that an oil ring ase'mica a'thrust-ring ii on each of the'dr ive shaftsjiiil andfii does not have a tight fit with the adjacent shoulder on the cage 53 but permits oil to pass thereby from an oil receiving is formed within the difierential cage or housing now to bedescribed. H The chamber l2'is provided with a feed port is which communicates with a chamber 14 formed 53 and which is supplied with'oil in a-manner as a part ofthe framed!) of the differential'mechanism Q8; The chamber I I is closed at its opposite ends'by oil seals 15 and 16 which cooperate with adjacent cylindricalsurfaces formed 'on the exterior of the housing or cage 53. It is, of course, evident that the anti-friction bearing'fii is within this chamber it and consequently it is lubricated by the oil therein.

a'grcove formed withinflan integral portion of groove formed in aremovable plate 17 which is the'ir'amedil while the seal 16 is receivedinaf attached to the frame 49& by spaced screws 18. Said plate '77 provides for'removal of the an'ti- Also formed as an integral pipe and chamber Hand in the chambers 12 and. id also lubricates other gears, bearings and'journals in a-manner now to be described.

The aforedescribed' bevel gears 56 and Ell are iourn'aled on spaced integral webs 8i and'82 form.

ing a part of the cage 53 and there is a plurality of bores or ports 83 which provide communicachamber 12 which 3 that the 'difierential cage is of unusual constructionbecause generally such a differential cage together with its associated ring gear is mounted in a totally enclosing difierential housing which contains the oil or grease for lubricating the variousgears, bearings and other frictional parts, I a1so provide within the differential mechanism d8 a-device for lubricating a drive chain 88 (see Figs. 1 and 2)" associated with the drive sprocket or gear di. Thislubricating construction is'intheform ofan oil chamber 89 provided The seal 75 is con'tained in ly drips "at every slow rate on with a removable plug Qtwhich chamber cornmunicates by way of an integrally formed feed pipe 95 which terminates just above the sprocket 15' with wool waste or the like so that the lubri- 55. lhe bottom of the oil chamber 89 is stuffed cating'oil which is preferablyifairly heavy passes through it in very small quantities and thus merethesprocket 5d and associated drive chain 88. I p j y 'Referringparticuiarly to Figs. 1 and 2 of the drawings, it may be pointed out that the complete drive gearing for the dual wheels 21 extends from an electric motor 92 carried on. the main From the above description tion to the central compartment of the cage 53 it formed by these webs 8| and 82 so that the oil in the chamber'iZ is delivered to this'compart merit and thus lubricates the gears 56,51 and 58 together withtheir bearing surfaces; From' this central compartment the oil is free tofiow by way of a plurality of bores or'por-ts'M in the web 82 to another chamber 85. In a manner similar to that above described in connection with the flow of oil from the chamber [2 to the bores it, the oil inchamberlifimay flow to the bores is at the right hand end of the cagett as viewed in Fig. 4 of-the drawings. Furthermore, there is another group of bores 86 leading from the chamber 85 to a chamber 87 within which the bearin 52 is housed and thus the'bearing 52 is also lubri cated. The housing Bl is provided-with appropriate grease seals and ring construction similar to that above described at 75, 16 and TI. It is thus evident that the lubricating oil delivered to the feed pipe and chamber l9 iubricates all of the bearing surfaces within the cage and housing 53 and lubricat'es the anti-friction I bearings 5i and 52 as well as thejournais es. 7 It is to be noted that in generalthe cageand housing 53'is an oil tight container except for j sci frame It by way of a speed reducing gearing which is disclosed in full detailin theabove mentioned patent to R. K. Jefirey. et al., and which ultimately leads to a sprocket 913 which is seen at g in said patent, which sprocket 93 drives the chain 86' which is guided overidler sprockets 9d and 95 and in tum drives the aforedescribed gear or sprocket 55. The sprocket 55 drives the cage 53 andin the absenceof anyjdifierential i action the sprocket 55, cage 53, shafts 60 and Bi and sprockets or gears i'i turn as a unittogether. The sprockets d? drive their, associated chains 56 which, as illustrated in Fig. 2 of the drawings, have their upper runs guided by idler sprockets or rollers 96 carried by the main frame in and which drive-the sprockets or gears d2 associated with thedual wheels 21. During turning movement of the miningmachine when differential action is involved the shafts til and ti, and their associated driving mechanisms, will rotate at different speeds.

vidual brake mechanisms 86 assist not only in the It is evident that the indistopping of the miningmachine but also in the turning thereof, in that, whilethe vehicle is being turned, the brake on one side may be actuated to aid in thisaction. a

The principal steering action which may be aided by the braking action above described is accomplished by asinglesteering wheel mechanism 97, which is disclosed in detail in Fig. 5 of the drawings, and which is situated at-the extremerear end of the main frame l0. Referring particularly to Fig. 5 of the drawings it will be seen that the steering wheel mechanism 91inthose ports, bores or passageways which lead; to

other enclosing chambers or restrictd areas which are to be lubricated. Furthermore, it is to be noted that the central portion ofthe housing or cage 53 is not enclosed but is exposed since the bottomportion of the ditferential frame dd is open, as clearly illustrated in Fig. i of the draw times and to" lugs, to permit access thereto at all the drive chain associated with the sprocket 55.

- Furthermore, the rear portion of this frame 69 is necessarily of open-construction to permit the drive chain to extend thereinto and mesh with the sprocket 55. In this particular, it is evident cludes a yoke es which at its top is provided with an integral stub shaft 99 mounted on a vertical or upright axis which is preferably along the longitudinal axis of the main frame Ill. The stub shaft 99 is supported lamp and bottom antifriction bearings Hi6 and it! which are carried in a cap m which is welded to and formed as an integral part of the main frame Ill. The upper end of the shaft 99 carries a removable cap I03 attached thereto by spaced screws and which has a ring [Us used as an indicating device to indicate the alignment of a wheel we carried by the yoke 98. Also attached to the upper part of the yoke Qdis a large ring. gear it which meshes with an integral pinion i (ll formed on the lower end of the rotor shaft of a rotary hydraulic motor I08. The gear its is enclosed within the housing formed by a top plate on the main frame I and surrounding plate I09 which provides a heavy oil retaining compartment for lubricating the gears I06 and I01. The wheel I is provided with a pneumatic tire H0 and since the structure of said wheel I05 is generally conventional and is clearly illustrated in Fig. 5 of the drawings, no detailed description thereof is believed necessary.

The hydraulic motor I08 is controlled by the hydraulic system which is disclosed more completely in the above mentioned patent to R. K. Jeffrey, et al., and it may be operated in reverse directions under the control of a reversible valve III (see Fig. 2) which is adjacent the operator's station.

In the normal operation of the device it is desirable that the wheel 91 be rotated a maximum of 60 to each side of a straight ahead position or, in other words, a total of 120, though under certain circumstances a larger range of adjustment may be desired. It may be pointed out that said wheel I05 may be continuously rotated by the motor I08 in the absence of some stop mechanism. To provide the desirable restriction above mentioned I provide a releasable stop mechanism II2 which is illustrated in Fig. 6 of the drawings. This stop mechanism includes a plunger H3 which extends through a yertical bore in'the rim of the cap I02 and in its normal position, as illustrated in Fig. 6 of the drawings, extends downwardly between a pair of stops or lugs, one of which is seen at H4, which stops are formed integral with the rim of the gear I06 and are I spaced 120 apart. The two stops II are so located that when one of them abuts the plunger II3 the wheel I05 will be 60 in a clockwise direction from straight ahead and when the other stop I" abuts the plunger II3 the wheel I05 will be 60 in a counter-clockwise direction with respect to the straight ahead position. In other words, the plunger II3 cooperates with the two spaced stops H4 to permit free adjustment of the wheel I 05 to 60 from the aligned straight ahead position to either side.

It is sometimes desirable, as above noted, to be able to adjust the wheel I05 in excess of 60 and consequently the stop mechanism H2 is provided with a releasing handle H5 which is pivoted to the frame I0 and at one end is pivotally attached to the plunger II3. A spring I I6 biases the handle II5 so that the plunger H3 is normally in stopping position. It is obvious that by pushing down on the handle II5 the plunger II3 may be lifted to permit entirely free rotation of the wheel I05. It may further be stated that since the wheel I 05 has no normal position, in other words, since it may be rotated 180 and in either of two positions 180 apart have exactly the same effect, I preferably provide two sets of stops II 4 so that should the wheel I05 be rotated 180, a new setof stops II4 functioning as above described will come into operation without requiring the wheel I05 to be reset to its initial position.

It is, of course, evident that the principal steering of the mining machine will be by virtue of the steering wheel mechanism 91 which is adjustable about the vertical or upright axis and which may be turned a full 360 though normally is restricted to 60 of turning movement in either direction from the straight ahead position unless released. This steering action may be supplemented, if desired, by operating one of the brake mechanisms 65 associated with the differential mechanism, as above described.

The operation of the mining machine while cutting a. kerf or while being transported is essentially that described in the above mentioned rib. Furthermore, the pneumatic tire mountingprovides for the ready transportation of the min. ing machine under its own power from one position to another in a mine, as for example from one room to another without requiring the laying of any tracks.

It may also be mentioned that pneumatic tires increase slightly the overall height of the machine measured with respect to the tops of the mine rails and to compensate for this the head section It has been modified very slightly by extending its length to insure that the cutter bar Il may cut at a position at least as low as the mine bottom upon which the tires 35, 36 and H0 are supported.

It is obvious that the mining machine produced is one which is not only universal in characterbut is extremely flexible and is easily adjusted or moved to various positions in a mine room at a transportation speed where it can be fed under its own power at a slow feeding or sumping speed for cutting a kerf. Other means of cutting kerfs by swinging the turntable II,

swingin the supplemental frame I3 or swinging the cutter bar II about the head I6 are believed obvious from a description of the mode of operation of the above mentioned patent to R. K. Jeffrey, et 9.1., all of which are preserved in this machine.

Obviously those skilled in the art may make various changes in the details and arrangement of parts without departing from the spirit and scope of the invention as defined by the claims hereto appended, and I therefore wish not to be restricted to the precise construction herein disclosed.

Having thus described and shown an embodiment of my invention, what I desire to secure by Letters Patent of the United States is:

1. Drive mechanism including a frame, a differential cage, a pair of spaced bearings directly mounting said differential cage for rotation on said frame, means for driving said differential cage, a pair of driven gears on said cage mounted to rotate relative thereto said gears being removable while said cage is mounted on said frame as aforesaid, means including an individual drive shaft connected to drive each of said gears, and differential gearing connecting said shafts and driven by said cage, said driven gears normally rotating with said cage on which they are mounted but rotating relative thereto when controlled .by differential action.

2. A differential drive mechanism including a frame, a differential cage, means including a bearing mounting said cage for rotation on said frame, means for rotating said differential cage, a driven gear mounted on said cage and independently rotatable relative thereto, means including an individual drive shaft extending into said cage and connected to drive said gear, and differential gearing connecting said shaft and driven by said cage, said driven gear normally rotating with said cage on which it is mounted -but rotating relative thereto when controlled by said driven gear and providing for removal of said driven gear while said differential cage is vdifferential gearing in said cage and connected thereto, and means including a shaft extending through said laterally extending portion and connected to said gear, said means also including a loose driving coupling between said shaft and gear.

4. A differential including a frame, a cage having a pair of laterally extending portions, a gear mounted for rotation on each laterally extending portion of said cage, means including a pair of bearings mounting said cage for rotation directly on said frame, differential gearing in said cage and connected thereto, and means including individual shafts extending through said laterally extending portions and connected to said gears, one shaft being individual to each gear, the mounting means for said cage being entirely independent of said gears mounted thereon.

5. A differential including a cage having a pair of laterally extending portions, a gear mounted for rotation on each laterally extending portion of said cage, means mounting said cage for rotation, differential gearing in said cage and connected thereto, and means including individual shafts extending through said laterally extending portions and connected to said gears, one shaft being individual to each gear, said means also including a loose driving coupling between each shaft and gear, each gear having a-brake drum rigidly attached thereto.

6. A differential including a cage having a laterally extending portion, a gear mounted for rotation on said laterally extending portion of said cage, means mounting said cage for rotation, differential gearing in said cage and.connected thereto, and means including a shaft extending through said laterally extending portion and con nected to said gear, said means also including a loose driving coupling between said shaft and gear, said gear having an integrally formed brake drum.

7. Drive mechanism including a frame, a differential includin a housing, differential gears in and connected to said housing, spaced bearings on said frame mounting said housing for rotation as a unit with the differential gears, said frame including an enclosure for one of said bearings, said differential housing having a portion extending through openings in said enclosure, seals between said housing and the walls of said enclosure openings throu h which said differential housing portion extends, means for feeding grease to said enclosure and lubricating the bearing therein, means providingan opening in said differential housing portion within said enclosure whereby grease therein can flow into said differential housing, another enclosure for the other of said bearings having openings through which another part of said differential housing extends, seals fOr said openings cooperating with said housing, and means providing an opening in said differential housing to provide a path for grease in said housing to said other bearing.

8. Drive gearing including a frame, a differential housing mounted on a pair of spaced bearings in said frame, means providing an enclosure for one of said bearings through which said differential housing extends, differential gears within said differential housing, a drive gear journaled on one end of said differential housing, means for supplying grease to said enclosure to lubricate said one bearing, said differential housin having an opening therein within said enclosure whereby grease therein may flow into said housing and lubricate said differential gears,

means providing a grease passageway through said housing to the other of said spaced bearings, and means providing a grease passageway through said housing to the journal of said drive gear on said housing.

9. Drive gearing including a frame, a differential housing mounted on a pair of spaced hearings in said frame, means providing anenclosure for one of saidbearings through which said differential housing extends, differential gears within said differential housing, a drive gear journaled on one end of said differential housing, means for supplying grease to said enclosure to lubricate said one bearing, said differential housing having an opening therein within said enclosure whereby grease therein may flow into said housing and lubricate said differential gears, and means providing a grease passageway through .said housing to the journal of said drive gear on said housing.

10. In a machine, a frame, a differential, said differential including a housing and cage, differential gearing in said housing and cage, means mounting said housing and cage for rotation as a unit with said earing including a pair of bearings carried by said frame, one on each side of said housing and cage, a separate enclosure for each bearing and separate portions of said housing and cage, said housing and cage having opposite portions each extending through a sealed openin into an individual bearing enclosure, and means for supplying oil to one of said hearing enclosures, said differential housing and cage having means providing a lubricating path for the oil in said one bearing enclosure to the interior of the differential housing and cage and the gearing therein and to the interior of the other of said bearing enclosures to lubricate the bearing therein.

ARTHUR L. LEE.

Images