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Publication numberUS1641670 A
Publication typeGrant
Publication dateSep 6, 1927
Filing dateAug 14, 1926
Priority dateAug 14, 1926
Publication numberUS 1641670 A, US 1641670A, US-A-1641670, US1641670 A, US1641670A
InventorsMarshall French George
Original AssigneeMarshall French George
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 1641670 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

Sept. 6 1927. l 1,641,670

G. M. FRENCH INTAKE Filed Aug. 14. 1 926 i l l l l l l I l l I 'l Patented Sept. I

PATENT orificecnonen msnen. FRENCH, or sr.' Josnrn, uranium.


Application :tiled August 14, 1926. Serial No.'129,151.

This 'invention relates .I to an intake through which water may be drawn Vfrom the sea for any desired use on boardv ship, as, for example, for supplying water for the water jacket of a marine internal combustion engine. Itis' usual to connect the inlet side lof the pump with an opening. in the hull, the. opening being covered by a strainer.' The inlet opening being rather small,'the velocity a opening is relatively high, with a consequent tendency to pick .up dbris and thus clog the strainer. The strainer not being conveniently accessible, it is Aimpracticable to keep the strainer clean.

Among the objects .of the present inven- 'tion are topprovide an intakel which shall permit the entrance of water at relatively` low velocity, which shall permit oit-the use of a' relatively large screen and thus render practicable theuse of a finer screen than has heretofore beenpermissible, and which shall give ready access to the screenfor cleaning `or inspection. v

In the 'accompanying drawings, Figure- 1 is a vertical sectional view of an 'intake embodyingthe features of my invention, the' i .intake being shown inoperative relation to Fig. 2 is a view 2-2 of Fig. 1. l v. s

Fig. 3 is an underside view of the water inlet.

taken in the plane of line Fig. 4 is a section on 'line y1 -f4 of Fig. 3.

Fig. 5 is -a fragmental view illustrating analternative construction. v 'Y In Figure 1, the hull or skin of a motor boat is indicated 'at A. 1 denotes an lclone gated vertically disposed casing tapering to'- ward its 'upper end. Inthe forni herein shown, the casing 1 is rectangular in crosssection. The lower end of the casing 1. is provided with flanges 2 by means .of which the casing is secured to thevinner side of the bottom of the hull in registry with an opening A extending through the hull. The 'opening A is vbelow-'the water line. The

.' casing `-1 extends above the water, line, its

' having upper Yend b eing closed by'a water tight clsure,`as for example, a plate. 3 secured in lace by screws 4..' The lower or outer -en of the opening A is covered by a strainer or grating consisting jo'f a plate 5 water linlet openings 6 therein. The

casing 1 the strainer plate 5 are secured ofthe water entering the.

in place by means of screws 7 or any other suitable means.

speed boat, a scoop 7e (Fig. 5) ot' common form may be used, if desired.

A screen or strainer 8 extends longitudinally of the casing land divides the space said casing into two compartments, one of which communicates with the. inlet open- .As will be apparent from Fig. 1, all vwater must pass through the screen 8 in order to When. installed upon a.

The lower .end of the screen rests' reach the suction opening 10. lt will be"- seen that upon removing the cap 3, -the op-a erator may take hold. of the 'upper end ofI the screen 8 and withdraw it from the casing 1 for inspection .or cleaning. g The openings A and 9 are ,relatively large as compared with the intake opening heretofore commonly used, water enters the casing 1 at relatively 'low velocity and therefore there lis less tendency `to pick up dbris. The strainer or. grating.

5 may be relatively coa-rse, as'it. is not solely vdepended .upon to keep-dbris out of the` system. Because of the relative coarseness A -of the strainer 5, and the fact that the opening Ay is considerably larger than the suction openinglO, water Hows through-the strainer 5' under relatively low velocity,

hence there is little tendency vfor dbris to cling to the strainer,

Byreason of the .size of the scrcn 8 it is practicable to use ai relatively 'small-mesh wire fabric, thus eifectively excluding dbris from the system without so restricting the passage as lto cause the water to 'flow consequently icawith high velocity. Due' to the relatively. l vlow velocity of the water flowing throng the screen 8, dbris has little orno tendency to clingv to the screen, but on the contrary, "w

tends to fall out through the openings. 9 and A when the engine sto s'. l believe myself to be t e which permits access to' the strainer from within the boat. It will be apparentthat first to .proi l duce a form of intake for marine' purposes no -v the strainer may be removed forlinspection 'or cleaning while the `vessel is in the water.

I claim as my invention:

1. The combination of a hull having an o ening below the wate'i` line, la vertically e ongated casing within the hull, the lower end of saidv casing communicating with` said opening and the upper end of the casing extending above the |water line, and an elongated .strainer -extendingjrom a point 'ad- Jacent to said opening to a point above the water line, said casing having .a suction o ening in its lower portion at the side of t e screen opposite to the rst mentioned I opening providing a water inlet below the water line, a casing within thek hull, the lower vend` of said casing communicating with said opening and'the. upperend of the casing extending above the water line, said casing having a suction openingin its lower portion, the area of said suction opening being smaller than the area of the water inlet, and a strainer interposed between the water inlet and the suction'opening.

4. The combination of a hull having `an opening therethrough below the water line,

a strainer covering the outer end.Y of the opening, a casing-withinthe hull having an opening communicating with the opening in g. '3. The combination of a hull having an the hull, said casing having a suction. opening, and a strainer located within the casing and interposed between the second menf tioned -openin and the suction opening.

5. The com ination of a hull having an opening therethrough below the .water line,

a relatively coarse strainer covering the outer end ofthe opening, a casing within the hull in communication with said opening, said casing having a suction opening in its lower portion, and a relatively'ine strainer within 'the casing and'interpo'sed between the opening in the hull and the suction opening.

6.. The combination 'of a hull having a water inlet opening below the water line,-

a casing. within the hull-communicating with said opening and extending above the'water line, a water-tight closureA for the casing,

and' a 'strainer Within the casing, said strainer being removable through-the upper end of vthe casing upon removal `of saidv closure.

7 .The combination, witha hull, of waterJ intake means connected to thehull below the water line and open at all times to thev iiigress 'of water, and comprising, a strainen located within the water intake means, s aid water intake means having ana opening through which the strainer is withdawable,v

8. The combination of a hull having an opening providing a water inlet `below the,

water line, a casing communicating 4with the inlet and,` having a suctionopening 4oil'l smaller area than th@ inlet, and a strainer' interposedy between the inlet vand the suc-` tion opening, said strainerv being of larger area thanthe inlet. j

' In testimonywhereof, I have hereunto aliXed my signature. v Y


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2450070 *Nov 2, 1944Sep 28, 1948Centrifix CorpMarine sea chest sand separator
US2563180 *Jan 28, 1948Aug 7, 1951Randall McfarlanStrainer-scoop
US2616386 *Jul 29, 1948Nov 4, 1952Carl Kiekhaefer ElmerWater cooling system for outboard motors
US2935954 *Aug 5, 1954May 10, 1960Blake MatthewsEave trough guards
US4169057 *Mar 10, 1978Sep 25, 1979Boaz, Inc.Fertilizer filter
US5040802 *Oct 6, 1988Aug 20, 1991Wojcinski Allan SBackstop frame
US5657946 *Sep 13, 1995Aug 19, 1997Westland Helicopters LimitedStatic vent units
US5833503 *May 30, 1995Nov 10, 1998Kallio; JaakkoBottom well and sea water piping system for vessels
US5890939 *Aug 25, 1997Apr 6, 1999Cotton; Richard G.Boundary layer water pickup device
US6089933 *Mar 15, 1999Jul 18, 2000Cotton; Richard GeneBoundary layer water pickup device
U.S. Classification114/198, 210/314, 210/153, 210/498, 210/459, 210/451
International ClassificationB63B13/02, B63B13/00
Cooperative ClassificationB63B13/02, B63B13/00
European ClassificationB63B13/00, B63B13/02