US1682697A - Concrete well strainer - Google Patents

Description

Aug. 28, 1928.

T. W. THORPE ET AL CONCRETE WELL STRAINER Filed Aug. 18, 1927 J r. n V f. MM r W k $.52 h M w J r m 6% .m b

UNITED STATES PATENTOFFICB THOMAS w. rnonrn AND GEORGE E. rnonrn, on nns Mourns, rower; hsslenons ire 'rnonrnnnornnnswnnt COMPANY, a coranrnnnsnrr coiurosnn or enonen n. rnonrn, WALTER r. *rnonrnann rnonasw. crnonrnnnn banner/mins,

. eonennrn WELL isrnarnnn.

Application filed au ust 18, 1927. Serial No. 213,836.

The object ofour invention is toprovide a concrete well strainer ofsimple, durable and comparatively inexpensive construction which will operate efficiently. A i H Stilla further object ism provide aconcrete supporting member adapted to have member.

sections mounted thereonand secured theretoavl1icl1 are' formed with a plurality of openings whereby water may pass through said sections and pass through openings formed in the concrete supporting member.

Still a further object/is to provide a supporting member formed of concrete and tubular in outline having a plurality of spaced ribs with a lower marginal supporting flange formed integral with the ribs whereby recesses are formed for receiving strainer sections. i

Still another object is to form the adjacent edges of the ribs of the supporting member andthe strainer sections with concave surfaces so that pockets are; formed whereby soft cement may he packed or placed therein for forming abond between the strainer sections and the supporting Still a further object is? to provide each strainer section with a plurality ofelon gated slit openings, each of said openings being smaller at theiiyreceiving end than at their clischargeendso that any material passing into said openings will be tree to continue topass through said openings.

Still a further object is to provide a modified form of structure wherein the strainer sections and supporting member are formed integral as single unitary structure.

With these and other objects in View, our invention consists in the construction, --arrangelnent and combination of the various parts of our invention, whereby .the objects contemplated are attained, as hereinafter more l'ullyset forth, pointed out incur claims, and illustrated in the accompanying drawingsfin which: y V

Figure 1 is a top. plan view-of our im proved concrete well strainer:

Figure 2is a side view of the samewith' one st'rainersection removed therefrom and parts shown" in. sectionto better illustrate theconstructionthereof.

=Figi1i'e'3 is asideview looking SltldOl one ofthe strainer sections.

Figure 4 1s a detail sectional ing member are cast integral.

In the accompanying drawings we have used the reference character Alto indicate generally the supporting member forming a at the in 1 U 0 View taken on the line 4-4 of Flgure 2 and i 7 and supporttil) part of our wellstrainer in the embodiment ot the supporting member A illustrated in the accompanying drawings we 1 have shown a supporting member formed withconcrete and substantially tubular in shape.

The supporting member A is formed with i a plurality ot vertically arranged outside ribs 10 having their opposite side walls curved or concave as at 1:2. Thepurpose ot the concave walls 12 of the ribs 10 will here inatter be more fully set forth.

The ribs 10 serve a two fold function in that they assist in the retaining of the strainer. sections in the position as will hereinafter be more fully set forth and at the same time serve to vertically reinforce the concretesupport A. y p

; A lower marginal flange. 14;" is formed along the bottomedge ot the supporting member A and is integ al with the lower endsof each of the r bs 10. The vertical. ribs l0 .and the lowermarginal flange-I l form strainer receiving'section pockets The supportA maybereini'orced with ironrods or wirereintorcings as desired dc pending upon the size ofthe completed well stramer. The T1133 12 materially increase the thiclrnessot the materialot the support Ain the place where the 'ribs 10 arefland. reinforce the this makes it possible to easily completed supporting member A.

The ribs 10 alsjo' have central openings 16 verticallyarranged whereby suitable tools may beinserted thereinjtor permitting the completed strainentoflbe lowered intoth'e well open ng and" set for use lnserted with 111 each of thestrainer sectionpoclrets B are strainer sections 0. a

Each strainer section curved in hori-: zontal cross section or *in the term of an arc sowthat when placed w thin the strainer section pockets B they will conform to the general contour and outline of the support A as clearly illustrated in Figure 1 of the drawings. Each strainer section .0 is

7 vertical ribs or solid portions 18.

4 openings 20 The openings 2i) arelongand marginal flange 14, avpocket 22 will he formed; which may be filled withsoit coni 7 height and in the embodiment as illustrated formed of poured concrete and has three :Between the solid portions 18 are, for-med a number of longitudinally arranged Slit narrow and comparatively small on their outside end which may be referred. to as the receiving end of the openings 20. The inner or discharge ends of the openings 20 are comparatively large so that as a matter otfaet the walls of the openings 20 are inclined and wider at their inner ends; a

t The openings gradually increase 'in size from the OlltGI'yWflll towards the inner wall t the strainer section proper,-v Each of the two vertical endsofthestrainer section 0 are forniiedwith concave surfaces so:

thatwhen a strainer section is set in between two adjacent ribs ltlland upon the lower e e i A s a Thepocket 22 having "its sides curved or concave, will allow the concrete 24: when it hardens to firmly hold the strainer sections G in proper relationship'to the silpport A. The strainer sections C maybe ma e ofany -in the-accompanying drawings-we have showntwostrainer sections placed in each pocket Bone upon the other. i r i i It may be here mentioned thatthe strainer sections may be of any heightvand one strainer section may housed or more, do pending uopn the manufacturing facilities.

' The wall of the support Ajbetween'the ribs is recessed a small amount as at 2650 that when the strainer sections Care in position,

,1 anarrow vertical pocket is tor-med by the mitting water andythe like to passthere through and into the interior of the support'As i We haveillustrated a set of openingsnear the lower ends oi the strainer sections in substantial? alignment with the upper surface of the marginal supporting flange 14'so that whenswater or the like passes throughthe strainer section (I) and the "pocket 26 it will continue to pass into the interioriofthel supr port A through the openings 28. L i

tny sand or the like passingthrough the strainer oueuings 2Q willtpass into the interior ofthe support A due to the fact that the lower openings 28 are so arranged asto permit no collecting pocket to be formed between the lower openings 28 and the strainer sections C. i

It will of course, be understood that the wellstrainer is ordinarilyplaced in a body of gravel and sandand that some fine sand will pass intothe openings and thus into the interior of thestrainer support A.

e will hereinafter describe the method of installation and how the strainer member functions. In Figure 5 of the drawings we have shown a modified strainer E integrally forrned with ribs 30 forming a part of theistrainer D. The ribs 30 areuformed at equal distances apart and the space in between the adjacent ribs 30 have strainer openings 1 32 formed therein which are of substantially the same shape ings 20. i a t In Figure 5 we have illustrated aniembodiment of our, invention wherein the as the open strainer section and supportingmember are formed as a single unit. The ribs 30 in the strainer. 5 are formed with suitable open ings 32 whereby the strainer may be engaged for positioning it within the well.

i Practical operation and installations Atterthe strainer sections C are placed upon the support A and securely fastened therein by the concrete 24, then the strainer is in condition to be set or lowered into the well opening. The strainer as illustrated in Figure 1 is lowered by meansof a cable or the like fastened in the openings 16 into the well openingfl 3 Water and sand as well as fine silt will pass in through the openings 20 and into the interior of the support A through the open ings 28. After the strainer has been properly positioned; a test pump is placed in op eration which sucks or draws the waterfront within the support A and with the water so drawn is the finesandand-silt.

The testpumping continues forsome tim until all the fine sand and silt is drawn through the openings 20 and withdrawn from in andaround the strainer leaving only the heavier materials such as gravel around the outside of the strainer. This forms a natural gravel packtor strainer efi'ect and there is no dangerof having fine sandand siltpumped up with water after the well has been completed and the regular pum equipment around the strainer insures a water to the strainer. i

A concrete strainer is verydesirable in that itis more or less porous and does not quick flow of installed. The gravel pac ill) become worn with age but as a matter of fact the longer it is in use the better it be comes. 1 The narrow outside openings in the strainer insures us that the openings will not become stopped up because they gradually increase in size towards the discharge end of each opening. a

Any mineral growth that forms on the outside of the strainer openings may be forced therefrom by dropping a heavy bailer or plunger into the strainer and the force will break away anycforeign growth upon the outside.

W'ater within the strainer is in direct contact with water on the outside due to the arrangement of the openings 20 and 28 which enables us to clear openings 20 by using the force of a bailer or plunger.

Some changes may be made in the con struction and arrangement of the various parts of our invention, without departing from the real spirit and purpose of our in vention and it is our intention to cover by our claims, any modified forms of structure or use of mechanical equivalents, which may be reasonably included within theirscope.

We claim as our invention:

1. A well strainer comprising a tubular concrete wall for forming a support, vertical ribs on the outside of said support, a marginal flange on saidsupport connecting the lower ends of the ribs together, the wall of the support between said ribs having openings therein and strainer sections placed be; tween said ribs and spaced from said wall.

2. A well strainer comprising a tubular shaped support, the walls of said support having openings therein, strainer sections mounted on the outside of sa d walls and spaced therefrom forming thereby a pocket between the support and strainer sections, ribs on the walls of said support between said strainer sections, the edges of said strainer sections being connected with said ribs whereby the sections are supported on the support, the strainer sections and said openings being in communication with said pocket.

3. A well strainencomprising a tubular shaped support, the walls of said support 4-. A well strainer comprising a tubular shaped support, longitudinal ribs thereon having longitudinal grooves therein,the' ribs having shouldered portions on each of their sides adjacent the point of their connection to the tubular shaped support, strainer sec: tions secured to said support between said ribs, the ends of said strainer sections engag ing said shouldered portions whereby the strainer sections are spaced from the tubular support for forming pockets between the tubular support and the strainer sections said ends of the strainer sections being provided with grooves which in conjunction with said grooved ribs form cement recciving pockets, and means whereby liquid may pass through said strainer and tubular support to the interior of the tubular support.

5. A well strainer comprising a concrete tubular shaped member formed with vertically arranged grooved rib portions and strainer sections therebetween, each of said strainer sections having its side edgesarranged with vertical grooves which in conjunction with the grooved ribs form a pocket for receiving cement whereby the strainer sections are supported relative to said tubular shaped member. y

Des Moines, Iowa, December 15, 1926.

THOMAS w. 'rnonrn. GEORGE E. THORPE.

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