US1041735A - System of splash lubrication. - Google Patents

Description

A effin 665e s E 2 A. P. BRUSH.

SYSTEM 0F SPLASH LUBRIUATION.

APPLICATION vFILED PEB. 15, 1911.

1,041,735. Patented-0015.221912.

4/5/ 6 H 'r l Y l fn v Yinventan cumin sauras rganr orrrcn ALAivsoN r. BRUSH, or FLINT, MICHIGAN.

.To all whom it may concern:

Be it known that I, ALANsoN P. BRUSH, a

citizen of the United States, residing at Flint, in the county of Genesee and State of Michigan, have invented a certain new and L useful Improvement in Systems of Splash Lubrication, of which the `following is a full, clear, and exact description.

In my prior Reissue Patent No. '12,524

there is shown and described means for satisfactorily producing splash lubrication of the cylinders of a multi-cylinder internal combustion engine. This construction has y been put on many motor cars and has proved l5: itself to be satisfactory' and efficient; but

tprior to the origination of the invention l which forms the subject matter of this patent, the said prior invention has been applied only to engines whose crank cases have 2Q a removable lower' part which is separable from the upper part in a plane which intersects the bearings of the crank shaft.

The present invention is an improvement on that which is shown in said prior patent.

It was particularly contrived to adapt the said 'splash lubrication system to use in connectlon with engines whose crank cases do not separate in aplanc which intersects the4 l crank shaft bearings; although the invention may also be used with such crank cases as do so separate in a plane which intersects -the crank bearings. y

The invention consists of a crank case the crank shaft bearing, andan upper part, (which may be made of one .or more than 'one fpiece) in. which the crank shaft is journaled,said` upper 'partv having along one 40,7(and preferably both) of sides a plurality of forwardly anddownwardly inclined trough's,and the removable lower part having'a plurality of oil pits into which sai-d troughs respectively discharge. 5- 'Ihe invention ,in its more'specific form includes alsoV the peculiar shape ofthe oil pits, bas shown in the drawing, and hereinafter ldescribed; in the inclined transversely extended :shelves which overhang the oilpits,

wardly-inclined return channelfor return: V'ingthenil.from the front'part of thecrank case to the ,.oil'pit at the rear' end of .said .crank shaft; and .n various othen specific 5,5 features vof construction; allfof which will i Specification of Letters Patent.' Application filed February 15, 1911. Serial No. 608,665.

and B the removable bottom section Patented Oct. 22, 1912.

and defined by the ent invention is embodied, a part of the wall of said crank case being broken away. Fig. 2 is a plan view of the removable bottom section of the crank case. tudinal sectional side view of said bottom section. Fig. 4 is a transverse sectional view of the crank case across oneof the rear pits thereonfor example, in the plane of line 4-4 on Fig. 1. Fig. tional View across the front oil the plane of line 5-5 on Fig. 1.

Referring to the parts by letters, A represents the upper section of the crank case, thereof. C represents the crank shaft which has four cranks c, and which is journaled in bearings in the ends of the upper section wholly above the removable bottom section.

D represents a connecting rod which is in engagement with one of the cranks; and E represents 'a curved oiling ltube which is screwed into the lower cap d of said connecting rod in communication with 4a hole pit and in Fig. 3 is a longi through sai'd cap leading to theel-ank bear.

` ing. This oiling tube is not new at the present time, and is not an absolute essential to the invention, although it does help i'n cans fing the circulation of the oil in the crank Y having' a removable lower part which is sep q 35' arable from the upper part in a plane below case, as will be described.

The crank case shown is such as is adapted for a four-cylinder engine. The bottom casing section B has four oil pits 6,6252, bis.' On

the side walls of the upper crankl case section A above the removable bottom section are inclined troughs a. These troughs .may be, and preferably are on both sides, but are of most service when on that side toward which the crank pin swingsvin moving through the jlower half of its path. There are three troughs a on each side, one arranged over and adjacent to each of the three rear oil pits, so as to be capable of catchingfthe oil splashed froml each of the three rear cranks and the 4parts associated therewith, onto the side 50 and the `open topped' downwardlyandrear-` walls of the' casing member A; and each ofI thesetroughs delivers the oil which it catches b4 formed within the -lower casing section andy extending across' the same from side to side, each shelf being rigid with and extended rearwardly and upwardly from the juncture of the dividing walls between two adjacent pits and overhangi/ng the rear pocket of the two. The oil which runs downward out of the troughs will drop onto these several shelves and will thereby be caused to flow into the next pit ahead. The

,front oil pit does not have associated with it one of the inclined troughs referred to. Instead there is a pocket a along o ne and preferably both side walls of the caslng section A each pocket being o pen at top and v serve to cover and close the top of said longitudinally extended channels b5. Near its front end each channel b5 is provided with a lateral oil set be which is directly beneath the pocket a. l

In automobile construction the engine is set so that the crank shaft inclines from its frontI end to its rear end downward a little. This is shown in Fig.'1 in which the front end is at the right side of the figure. Now, in the operation of the engine the oil tubes E willdip into the oil in the several oil pits and thereby oil will be splashed around in the crank case and some will be thrown against the side walls of the casing. Additionally the oil tubes E will, as they plunge into the oil become filled with the same; and as they rise and leave the oil pools in the pits the oil will for most part run out and be delivered against that side wall of the section A toward which said tubes move in so rising. The oil so thrown against the walls ofthe section A will run down into the associated troughs a and will be delivered therefrom onto the shelves band thence into the next pits ahead; and thereby this oi'l will be gradually carried forward. When it reaches the front pit and is splashed therefrom, it will run into the pocket, thence into the offset part b of the longitudinally 'extended channel b5 in which it will iow by gravity rearward into the rear pocket. It will be noted that the rear walls bl of these oil pits are pretty nearly vertical and that the front walls bs are inclined considerably forward and upward; and that the shelves t4 overhang these inclined walls bs of the pits. This particular constructionV is of advantage because, 1f the automoblle 1s going up hill, the rear end of the crank case becomes more than usually depressed relative to thefront end. This will change the level of the oil in the pits; but, in fact, it raises a the oil level in the pockets relative tothe planes in which the lower ends of theitube E sw-ing, and thereby these tubes will dipl deeper int-o the oil and will throw more oil into the casing walls. This is as it should be because in going up hill more oil should be splashed because the engine requires more. In going down hill, it is the front end of the crank casing which is depressed, and the oil will run forward and its depth will be decreased relative to the oil tube E, and this is as it should be because thereby less oilwill be splashed, and less oil is required under these conditions.I The overhanging shelves b4, however, prevent the oil from running from one pocket to the other, however much the crank-case may be tipped, as stated, under any conditions in practical use.

Having descrlbed my invention, I, claim:

l.' In a multiple cylinder engine provided with a plurality of cranks, the 'combination of a crank case, and a crank shaft mounted therein,-said crank case having a bottom section which is removable in a yplane below the crank shaft bearing, and is formed withoil pits located one below each crank, and an oil return channel which is located in its upper edge in t-he plane of separation of the two casing members and has` an open front lend adjacent t-o the front pit and extends therefrom to a point where it may be discharged into the rear pit, and the upper part of said crank case having on the side wall, toward which the cranks move when in their lowest positions, inclined troughs which are loca-ted one over 'each of the oil pits except the front one and are arranged to discharge into the its next ahead of those over which they are ocated.

2. In amultiple cylinder engine provided' with a plurality of cranks, `the combination of a crank case having a removable bottom section which is separable from the part above it in a plane below the crank shaft bearings, and has oil pits located. one below each crank, there being in said lower section transversely extended shelves which extend rearwardly and upwardly from the places where the walls of the adjacent pits. are` joined and partly overhang the oil pits be hind them. l 3. In a multiple cylinder engine, provided with a plurality of cranks, a crank case having a removable bottom section which is separable from the part above it in a plane below' the crank shaft'bearings, and has a plurality of oil v,pits located one below each crank, and has along one edge a longitudinally extended open topped trough provided with a lateral offset near the front end, the upper part of said crank case having along one lower side edge an inwardly extended -flangewhich, when the parts are connected together, covers 'said oil channel, excepting the offset partthereof, said upper member having on its sides above all of the oil pits except' the front. one downwardly and forwardlyinclined troughs which severally discharge into the pits next ahead of those above which they are located, and said side also having 5above the front pit an open topped pocket whoselower end is in open' communication with the offset part of said oil channel.

,4. In a multiple cylinder engine provided with a plurality of cranks, acrank case in which the crank shaft is mounted, which crank case has a removable bottoni sectionwliich is separable lfrom the lpart above it in a plane below thecrank shaft bearings, said bottomsection having a plurality of oil pits located respectively'below the severa-l cranks, the rear Vwall of each oil pit being approximat-ely vert-ical and thefront wall of said oil pit being inclined morenearly toward a horizontal position.

5. In a' multiple cylinder engine provided i with a plurality of cranks, a crank case in which thevcrank shaft is mounted, which vlocated respectively below the several cranks,

the rear wall of each oil it being approximately vertical and the ont wall of said oil it being inclined more'nearly toward a horizontal position, and Adownwardly and forwardly inclined shelves' extending from one side of the lowerl crank case 4section to the other side and connected at their'front ends with the juncture's of thefront and rear Walls of adjoinin its andfext'ending rearward and upwardg rom these points of connection so asv to overhang the pits behind them.

1`n testimony whereof, I hereunto affix my signature in the presence of two witnesses.

' ALANSON P. BRUSH.

Witnesses:

0. V. vH. NACKER, E. L. THnRs'roN.

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