US1910186A - Surface drain - Google Patents

Description

M. A. SlSK SURFACE DRAIN May 23, 1933.

Original Filed Dec. 2O

Patented May 23, .1933

UNITED STATES PATENT OFFICE SURFACE DRAIN riginal application illed December' 20, 1928, Serial No. 327,222. Divided and this application med ctober 25, 1930. Serial No. 491,202.

The parent application discloses a non.

clog surface drain,that is to say, one that will admit the free flow of liquids there- '10 through, but which will prevent refuse from entering the main outlet of the drain and obstructing the same. Inbrief, my parent Vapplication discloses a surface drain, so constructed that it will separate out the floating solids and refuse, as well as the submerged solids and refuse from the iuids entering the drain.

The primary obiect of the present a plication is to provide a non-clog surface (iiain assembly, which shall be so arranged that it will be unlikely or impossible that the attendant who cleans out the drain will leave out certain essential parts thereof after such cleaning. In other words, to provide a foolproof assembly.

Another object is to provide a simple and effective device for retaining both submerged and floating solids. and which will enable the simultaneous removal-of both solids mentioned.

Still another object is to provide means to prevent the` discharge of hydro-carbon liquids into the main .outlet of the drain leading to the sewer line, by which such liquids may be removed with retained solids,

floating or submerged.

Another specific object is to provide a floating solids retaining device, which will retain all solids in such a manner that they will not give olii' obnoxious gases into' the air above the drain, but will be allowed to decompose and pass out of the drain in the same manner as liquids.

A still further object is to provide a oating solids retaining device, including a liquids strainer which will act on such solids while still submerged and direct them in such a manner as not to tend to clog the strainer.

Further objects and features of the invention will become apparent from the following description relating to the accompanying drawing, wherein I show preferred forms of the invention, including various modiications. The essential characteristics are summarized in the claims.

In the drawing, Fig. 1 illustrates a drain in substantially-.central vertical cross-sections, showing particularly various foolproof assembly features. Fig. 2 is a view similar to Fig. 1 of a modified construction, the modification relating particularly to the retaining means, which is especially adapted to retain comparatively light liquids, such as gasoline, oils, etc., along with solids. F ig.

3 is a view of a drain, partlv broken away 1n central vertical cross-section showing a still further modification relating particularly to the means employed to retain solids during their decomposition.

The general features of the present invention are as follows: There is a hollow drain body open at the top and provided with a grate structure for determining the size of solids which may enter the drain. Beyond this is a liquids and solids conveyor preferably centrally of the drain and communicating with the grate openings, and which carries these liquids and solids toward the bottom of the drain. The conveyor discharges into a sediment chamber located at the bottom of the drain body. The liquids level of the sediment chamber is determined by the highest retaining wall portion of the sediment chamber.

Associated with the sediment chamber is a refuse retention device which may be variously arranged depending on the character of refuse and the manner in which it is desired to retain the same, for example, whether liquids of a particular character or whether solids, and if solids whether these are to be retained above and below the liquids level of the sediment'chamber, etc.

A characteristic shown in all figures except Fig. 2, is the provision of auxiliary inlet openings and an auxiliary inlet chamber below such vopenings which, in the event that solids accumulate within the drain to such an extent that liquids cannot get through in the usual manner to the main outlet, will permit liquids to be drained oi the door substantially directly into the sewer drain line through the main outlet, by-passing the refuse retainer. This arrangement just discussed also rovides venting means to prevent the accumu ation of volatlle gases, particularly ex losive gases, from being trapped and retained, in the drain body.

A further general feature of the invention is the arrangement of retainer walls and strainer o eningsby which buoyant solids temporari y submerged by agitation of the liquld containing them, are forced in a directioncontrary to that which would naturally resultv in clogging the strainer openings.

With the above eneral description in view,-

my'invention resi es in various arrangements designed to carry out the above objectlves and embody the features generally discussed above, as well as other specific features to be later set forth.

Referring again to the drawing, 1 indicates the drain body in all figures. This has a shouldered opening at the top designated 2, and a fiange 3 adjacent to the opening which overhan s the side walls of the body, outwardl t erefrom, and forms a strengthening ri for the top of the body. Below the flange 3 and extending outwardly from the side wall of the body is a flange 4 which may be considerably varied in construction, but

which is preferably terraced as at 5, partly toprovide securing anchor surfaces for the concrete formation of the floor, but mainly to direct see age liquid toward the body.

The danges 3 and 4 cooperate in holding the drain body in position in the floor struc' A through the body wall, are a suitable number of seepage openings 6 which drain olf an liquid which may accumulate about the body below the iange 3, this seepage discharging into the drain body, and thence to a main-outlet to be presently described. I

The drain body in all figures is provided with an outlet which is disposed at the bottom of the body while the main discharge opening is indicated at 10 in all figures.

It is usually desirable that the drain body be provided with a main air vent for carrying obnoxious or inflammable gases out of the drain body. -This vent may include a hub constructionally integral with the concrete anchor flange and adapted to receive a vent pipe leading to any suitable ventilator or lin the drawing.

stack. Such an air vent hub is designated 11 Referring particularly to Fig. 1, 15 is a suitable mam inlet closure member in the nature of a grate having enlarged openings 16 therethrough, preferably diverging downwardly to prevent clogging, the outer edges of the grate being seated 1n the shouldered opening 2,7and restingl on the shoulder. Below the ate and su stantially invintimate contact t erewith so as to catch all materials, whether liquids or solids entering the main grate openings 16, is a hollow conveyor member 18 forming a main liquids and solids receivin chamber.

As s own, there is a removable sediment receptacle 23 in the nature of a bucket, having supporting lu s 24, for resting on the bottom of the drain stances, the sediment receptacle brim determines a liquids level L above the general body liquids level L, The sediment receptacle has a suitable number of lugs, preferably four, two of which are arranged to support a bail 27, adapted `to lie within the drain body and at one side of the conveyor 18 in easily accessible position. The shape ofthe lugs is ,best shown in Fig. 3, wherein it will be seen that these lugs have grooves 28 for receiving and retaining the eye portions of the bail. TheY outer ends of the lugs prevent lateral shiftody. In this and similar in-` ing of the receptacle with relation to the body. 1

It is desirable that, when a removable sediment chamber is provided, the retainer be removed simultaneously therewith to prevent spilling the retained refuse into the body space outwardly from the sediment chamber. The arrangement of Fig. 1, for example, per.- mits this since the bail 27 projects above the top edge of the retainer, hence simply raising the bail results i-n raising both the receptacle and the retainer.

The retainer member 30, in order to hold back substantially all solids while permitting excessliquids to drain from the sediment receptacle through the body to the main outlet, is provided with liquid discharge channels, shown as small horizontally extending perforations 33 therethrough. The member 30 cooperates with the sediment chamber wall to prevent escape of either submerged or floating solids therebetween. As shown, this cooperation iseffected by continuous line contact of the outer edge of the skirt vwith the sediment chamber wall. When it is desired to discharge floating liquids, the openings 33 are disposed at the liquids level L as at 33 and below this level.

By the arrangement shown in Fig. 1, it will be seen that sedimentdischarged through the conveyor will be deposit-ed at the bottom of the sediment receptacle while floating refuse,

temporarily submerged, will be directed upwardly by the inclinedwall 30, and in a direction generally contra to that favorin a tendency to clog the openings 33, into the 1mperforate part of the retention means. This imperforate part, as shown 1n Fig. 1 may 5 comprise part of the retainer but may also'be gtherwise arranged, as will be'presently set orth. It will be noted that in Figs. 1 and 3, the

o nings suchas 33, comprlsin theoutlet of which determines the liquids'level L withf in the drain body. It is desirable, particularly where a removable sediment receptacle is provided, to have its liquids level above the level L; as lin Fig. 1, for example, so that buoyant liquids discharged through the openings 33 will more readily drain off the top of the receptacle 23, so as not to be removed with the receptacle. A

It is manifest that continued use of the drain without cleaning will eventually ref sult in blocking the intended channels by accumulated refuse so that a, pool` of li uids may be caused to stand above the main inlet to the drain body for a considerable period. This is obviously undesirable. To prevent this, I provide the auxiliaryinlet and -by-pass discharge, previously mentioned..

The by-passing arran ement, as shown in Fig. 1, comprises a suita le number of small openings 17, outwardly from the larger opening 16, preferably downwardly diverging in shape to prevent clogging by solids. Such openings lie outwardly from the top edge of the main inlet chamber, so as to discharge directly v into the body without passing through the sediment chamber,- the' retainer, etc. Thus, assuming the normal passages are clogged, liquid from the surface to be drained will pass through the openings 17, and run directly down into the drain outlet 10. The auxiliary inlet openings A are much smaller than the main inlet openings, hence, although they will serve to drain the surface above of 'liquid so long as this surface is kept clean of refuse. the device'acts as a tell-tale to inform the attendant when the solids retention means are obstructed, because liquid will run through the openings' 17 much more slowly than through the normal channels.

The openings 17 have a further function in that they will discharge all volatile gases accumulating Within the drain body and likely to stand about the conveyor 18, where they might cause an explosion if ignited when the various parts-are removed for cleaning.

provides a shouldered opening '46 for sup- The auxiliary inlet openings may be variously arranged. In Fig. 1, for example, they are formed in the annular grate supporting member 45; and in Fig. 3, the openings are formed beneath the main vgrate member, Le., between the top .edge of the conveyor and the main grate.

It is desirable to so arrange the drain that, after cleaning the same of accumulated refuse, the attendant will not leave out certain parts.

One meansof accomplishing this is -illustrated in Fig. 1, wherein the retainer is ordinarily removable only with the sediment receptacle, and the conveyor Ais vpart of the main drain inlet affording means. Theattendant is compelled to replace the conveyor and in order lto put back the sediment receptacle,'he must also completely recondi-tion` the retention means. This is accomplished by providing Fi 1 with a-n'annular grate supporting mem er designated 45, which as shown, is integral with the conveyor 18. The outer edge of the annular member 45-rests in the shouldered opening 2 ofthe body, and

porting the grate 15. It will be obvious that the attendant will not be able to properly replace the grate on to the drain until he replaces the annular member 45falong with the conveyor 18. l

Likewise the retainer 30 is shown to. be attached as by screws to the removable sediment receptacle 23, hence it will be obvious that the attendant willnot be able to replace the receptacle in the drain without also pl'acing the retainer in proper position therein.

In Fig. 1 the auxiliary inlet openings 17 are formed in the rim of the annular member 4 5, hence, even though the drain is used with the grate removed, as in some instances, the auixllary inlets` are still available for serving their function, as previously discussed.

In the drain shown in Fi 1, the conveyor, previously designatedA 18, asrestricted extension or dip-pipe proper formed at 47, which enters the sediment chamber to a point below the liquids level thereof, making an air seal and causing the discharge into the sediment chamber to bey below the liquids level, thus causing li ht oils and other buoyant liquids, gasoline or example, to overflow the sediment receptacle. In other words, oil and gasoline remainin from previous discharges at the top of t e sediment chamber is immediately washed out and does not become emulsified with the water.

The bottom or outlet en d of the extension 47 may also extend some distance below the lowermost outlet holes ofthe retainer, and thus comprise the lowermost portion of the l2 retention means. Thus, submerged solids accumulating within the sediment chamber may reach and obstruct the outlet end of the extension-before reaching and obstructing the retainer outlet holes, and preventing formation of a static head of water within theretention means and beyond the ,extension plpe. Such formation would be particularly ob-V jectionable when, as in Fig. 2, for example,"

refuse might thus be discharged out of the retainer.

When an extensionor dip pipe is employed easy discharge through the drain, preventing undue disturbance of solids held therein,

land also preventing undue rise of the liquids level which may cause liquids to overflow into the air vent 11, if such vent is employed.

` The retentionmeans of Fig. 1 comprises a tubular member having a perforate skirt portion 30 below the liquids level of the sediv ment chamber and an imperforate continuous portion above this level and spaced outwardly from the conve or extension. The skirt 30 has a flange 48 wh1ch may be attached as by screws to the wall of the removable sediment receptacle. The upper endof the imperforate portion 5()1nay makecontinuous contact with the conveyor forming a substantially closed continuous floating solids retaining space above the liquids level of the sediment chamber. tering the drain shown in Fi 1 will be pro'- jected, first, deep into the se iment recepta-l cle, and then afterward the floatingsolids will accumulate partly in the dip pipe and.

partlyl in the floating solids retaining space.

- 'An advantage of this arrangement is that the previously caught floating solidsare for the most part kept out of the direct path of new material entering the sediment receptacle, and are therefore not stirred up at each` charging of the drain.

The retainer member and extension or dip pipe, and incidentally all the tubular bodies of the illustrated constructions, are preferably'circular in cross section,but may be of any desired shape, square for example.

Fig. 1 shows a main outlet trap built onto the drain body. This, as shown, comprises an upright hollow member 55, integrally joined at its top portion, which is fianged similarly to the top of the body as at 3', and which has cast `integral therewith an extension 4 of the concrete anchor and seepage flange. The hollow member 55 isv further connected to the body by an elbow portion 57 forming the main outlet of the body.

The discharge opening of the trap, which determines the liquids level L, is shown as a hub-59 at one side of the hollow member 55.

Liquids and solids en-f This is adapted for receiving the usual downy wardly extending drain plpe not shown) leading to the sewer. If desire ,I may provvvide a rib at60 for supporting a back water t ter the drain, butin other inta-nces, existing ordinances prohibit discharge of such liquids into sewers, because an excess of same may be inflammable, and .may also pollute rivers and streams. In View of this, I provide means to collect within and later remove from the drain, not onl light oils, gasoline, etc., which ordinarily oat at the water level, but also heavy oils, etc. which may submerge within the water. This is accomplished without intereference with the previously described functions, whereby solids of either a floating or submerging character are collected'.

Fig. 2 illustrates the preferred arrangement, the conveyor 18 and sediment rece tacle 23 being employed together with a mo ified retainer wherein the oil, etc. is held with `the solids andv may be readily removed: The

retainer includes an unusually deeply discharging extension pipe 47. Encirclingand spaced outwardly from the extension is a tubular retainer member 65 imperforate for a considerable distance above and below the liquids level L. The wall of the sediment chamber is spaced outwardly from and Vencircles a considerable portion of the member 65. v

Y Below the liquids level of the sediment chamber, the lowermost portion of the member 65 is provided with a horizontally disposed andoutwardly extending flange 66,

which engages the wall of the sediment chamber, there being outlet holes 67 formed between the flange and the imperforate por- An outlettion of the retainer member. chamber 68, constituting a water trap, is thus formed between the wall of the sediment chamber and the Wall of the retainer. The outlet holes 67 provide access for flow from the retainer to the water trap.

In order to direct the liquids entering through the extension pipe, first upwardly and then downwardly before they may enter the holes 67, a baffle 69 is provided, preferably formed as an extension of the flange 66.

This extends inwardly and upwardly, its top level being somewhat higher, than the top level of the outlet holes 67, the space between the vertical wall or baffle and retainer forming an inlet chamber 70 leading to the outlet holes, creating a downward flow fromfthe retainer to the outlet holes, and preventing direct vertical or horizontal flow out of the retainer. v

The water level of the sediment chamber 1s 5a considerable distance above the top level l0 baile, a water seal is formed to prevent the escape of the oil and oating refuse. The depth of water seal is variable, and depends upon the depth or height of the oil and floating refuse disposed at the water level, and the extension or height of the water seal above the top level of the bame may be va ried as desired to suit various conditions. The extension or height of the retainer above the normal water level may be in proportion to the depth of the water seal. Y

Oil and floating refuse received in the drain will not enter the inlet chamber 70 but will rbe carried upwardly within the retainer member to a point higher than the outlet holes 67, from whichpoint the fiow into the outlet holes is downward. From that point, the floating materials contained in the water are carried upwardly by flotation or gravity to the higher water level. At the same `time the sur lus water will overow 'the top edge of the baille and being heavier, will readily ow downwardly through the inlet chamber and out through the outlet holes 67 and outlet chamber 68 of the water trap.

During this operation, the oil and iloating refuse previously held or contained at the water level within the retainer will not be unduly disturbed or agitated, nor is it emulsied to any extent. It is obvious that the baille 69, by its extension above the top level of outlet holes 67, will deect floating materials to the higher'water level of the sediment chamber. In this instance, the outlet holes are not necessarily of lesser area than main inlet holes 160i the drain, the retaining function for ioating materials being obtained in this instance by means of the baiile, rather' than by limiting the size of the outlet holes 67.

As in other instances, the retainer member 65 is a portion of the retention means, but

in this instance it should not be attached to or formed integral with the conveyor and extension pipe, and it is preferably disposed within and rests upon lugs 71 formed within the receptacle 23, and is withdrawn therewith to prevent escape of oil and oating refuse to the main outlet.

The extension pipe 47 may be advantageously extended a considerable distance below the flange 66 of the retainer, so that discharges into the drain will enter the sediment chamber well below the retainer, and thus provide a comparatively large area between the lower end of the retainer and the outlet end of the extension pipe, from which area,

even though the sediment chamber and ow can take place beforehand of water con.- tained therein from previous discharges, and

oils of certain viscosities, very close to that of water, may become separated and rise to the water level during the intervals between successive dischar es.

It will be seen t at the reduced area of the' outlet of the extension pi 47 and its extension downwardly beyondptthe flange 66 and bale 69 of the retainer, will invariably cause obstruction of iow, by reason of accumulatedA solids, to take place at the outlet end of the extension pipe, and this will prevent formation of a static head of water within the retension means, which might otherwise discharge the oil, etc. out of the top of the ref tainer. 4

Gases rising from oil, gasoline, etc. contained within the retainer pass out throu h its top into the drain body, the top of t e retainer being purposely open to provide such passage, and constitutes a retainer air vent 75. Either the air vent branch `provided at l1, or auxiliary inlet openings, such as 17, shown in Fig. 1, may remove these gases from the drain body. In order to prevent ooding the air vent, the branch 11 is preferably'located a suitable distance above the highest liquids level established by heavy discharges into the drain.

Fig. 3 illustrates a modified arrangement, prevlously mentioned, of auxiliary inlet, b which drainage for the surface may be had;

retention means become entirely clogged. This comprises openings formed as notches 72 at the upper edge of the conveyor member 18, this being shown attached as by screws to the grate 15. 'Ihhe grate has a protecting depending rib 73 on its underside. l

By such an arrangement as shown, the aux iliary drainage openings are entirely p'rotected against cloggin until such tlme as the become necessary or surface draining.

t is sometimes desirable to provide for the retention of solids, particularly those likely to decompose, in such manner that these solids will not give oii' obnoxious gases into the air above the drain. It may also be desired that such solids be allowed to decompose and pass out of the drain in the same manner as liquids without building up an increasing accumulation. The arrangement shown in Fig. 3 is adapted with the above in view.

Fig. 3 shows a grate and liquids and solids conveyor arrangement very similar to that of Fig. 1, but the auxiliary drainage openings are shown beneath the grate. This includes a dip pipe portion 47 of the conveyor extending downwardly materially beyond the brim of the sedimentA receptacle 23. This feature of the arrangement, particularly the di pipe, is largely essential, as will be present y understood. Surrounding the dip i and substantially entirely submerged beldw the liquids level of the sediment chamber, is a retainer having a flat top 78 even with the receptacle brim and provided with a contiguous vertical wall 76 havin the usual horizontal openings therethroug at 33. Considerably below the top of the sediment chamber the retainer flanges outwardly and then downwardly as at 77 to provide for suitable attachment for the retainer directly onto the wall of the sediment receptacle.

It will be seen that floating refuse will not accumulate above the water line, except within the conveyor, because the horizontal wall or roof of the retainer is submerged. Consequently, this floating refuse will accumulate adjacent the openings 33, and as this refuse disintegra-tes, the particles fiow outy wardly through the openings, thence over the brim o`f the sediment receptacle into the discharge outlet of the drain body. During the decomposition, the refuse is entirely below the surface of liquid in the sediment recepta-l cle, hence, obnoxious gases have less tendency to form.

In the above description, the term floating and submerged have been used extensively as modifying solids. It will be understood, however, that in certain instances, the

parts of the solids retention means function without regard to the character of solids. In Fig. 1, for example, it will be clear that the extension 47 which clearly forms part of the floating solids retention means also functions to prevent submerged solids from entering the main drain outlet, since whenever submerged solids accumulate to the level of the discharge end of the extension (i. e.. before reaching the brim of the receptacle 23) further discharge of material through the regular channels is stopped. The terms floating and submerged as appearing in the claims are, therefore, in general not to be construedV as limiting I claim: 1. In a surface drain, a hollow drain body adapted to have its top edge fiush withy the surface to be drained, a removable main inlet member at the top of the fitting, means but rather explanatory terms.

suspended beneath said inlet member for conveying liquid and solid material from said surface, a sediment receptacle in thelower part of the drain body. and having the normal liquids level thereof above thelower end of said conveying means, a solids retainer member disposed within the receptacle and supportedby the wall vof the receptacle and lying outwardly from the conveying means, said retainer member having openings therethrough, substantially all the openings being below the plane of saidl liquids level, whereb retained fioating refuse will not obstruct tli'e openings. f

. 2. In a drain, a lhollow body, a removable perforate top'closure therefor, means below liquids and solids toward thebottom of the tioned within the same, said retainer pro-L viding an outlet therefrom for liquids, and means to insure removal of the retainer simultaneously with the receptacle.

3. A drain comprising, a body having a main inlet arranged to admit liquids and solids, tubular means forming a main inlet chamber within the bodyl and communicating with the main inlet, a sediment chamber within the bod and solids retaining means associated therewith arranged for holding solids in the vicinity of the sedi` ment chamber, a main .outlet for the body to receive and drain excess liquids from the sediment chamber, and an auxiliary liquids inlet including means having an inlet opening communicating with the surface above the drain body and directly with the interior of the body between the wall thereof and the main inlet chamber, for by-passing the .main flow directly into the main outlet through the body in the event either the inlet chamber or sediment chamber become blocked by accumulation of'refuse, the auxiliary inlet being disposed below the main inlet and associated with the main inlet.,

tion means communicating with theinlet and outlet, said means including: av sediment chamber withiny the drain body arranged to determine a liquids level within the body including a bucket being disposed within the lower region of the body, aconveyor associated with the inlet and arranged to discharge material deeply into the sediment chamber below said liquids level, a retainer disposed within the bucket and positioned between the conveyor and the sides ofthe bucket, said retainer extending above and below said liquids level, but arranged to pass material from one side thereof to the other, and a baffle interposed between the discharge end of the conveyor andsaid retainer and arrangedto defiect material discharged by said conveyor upwardly toward the said liquids level, thereby preventing direct passage of material from the discharge end of the conveyor past said retainer.`

5. In a drain, a drain body having an'inlet and an outlet, tubular convey-ingmeans below said inlet and communicating therewith, a

- sediment bucket disposed below said convey- 65 the closure for conveying and discharging drain body and means associated with said sediment bucket, adapted to allow liquids to escape therefrom to the outlet and to hold all solids within said bucket and below the normal liquids level.

6. In a drain, a drain body having an inlet and an outlet, tubular conveying means below said inlet and communicating therewith, a sediment bucket disposed below said conveying means, the conveying means extending below the top of said sediment bucket, a cover member for said sediment bucket, the cover member having one large opening therethrough and a plurality of smaller openings, the conveying means extending through said large opening, the smaller openings being adapted to allow liquids to pass from the sediment bucket to the outlet, said cover being disposed below the normal liquid level of the drain body, whereby floating solids likely to disintegrate are retained entirely submerged during disintegration thereof.

7. A drain comprising a body having a main inlet member arranged to admit liquids and solids, tubular means forming a main inlet chamber within the body and Communicating with the main inlet, said inlet member having a projection extending into the inlet chamber forming means, a sediment chamber within the bwdy and solids Vretaining means associated therewith arranged for holding solids in the vicinity of the sediment chamber, a main outlet for `the body adapted to receive and drain excess liquids from the sediment chamber, the tubular means having an opening at the top thereof above the bottom of the projection on said inlet member for by-passing the main flow directly into the main outlet through the body, in the event either the inlet chamber or sediment chamber becomes blocked by accumulation of refuse.

8. The combination, in a drain, of a body having an inlet and an outlet, a removable sediment bucket disposed within said body, a

conveyor member extending into said bucket and adapted to conveyed liquids and solids l0. A drain comprising a body havinga main inlet arranged to admit liquids and solids, tubular means forming a main inlet chamber within the body and communicating with the main inlet, a sediment chamber within the body and solids retaining means associated therewith arranged for holding solids in the vicinity of the sediment chamber, a main outlet for the drain body adapted to receive and drain excess liquids from they sediment chamber, and an auxiliary liquid inlet adapted to by-pass liquids from the surface to be drained, directly to the outlet, through the body of the drain, in the event either the inlet chamber or sediment chamber become blocked by accumulation of refuse.

11. In a surface drain, a drain body having an inlet and an outlet, a removable sediment receptacle within saidbody, a conveyor within the drain body adapted to receive liquids entering the inlet and convey them to the sediment receptacle, and a floating solids retaining member, provided with openings therethrough to drain liquids from the sediment chamber, said member extending down into the sediment receptacle and surround,- ing the conveyor member, said floating solids retaining member being adapted to prevent Heating solids from entering the drain outlet.

In testimony whereof, I hereunto allix my signature.

MARTIN A. SISK.

from the inlet to the bucket, a baille member within the bucket adapted to direct the liquids entering the bucket upward adjacent the conveyor member, and a solids retaining member within the bucket and surrounding said conveyor member, said retaining member extending above and below the top of the bucket, there being openings adjacent the bottom of said retaining member and below the top of the baille member, forming an outlet for said bucket.

9. A drain according to claim 3,`Wherein the main inlet comprises a removable member having a pluralit of openings near the surface to be draine and wherein the auxiliary inlet comprises a plurality of openings of individually lesser area than the main inlet openings.

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