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Publication numberUS921513 A
Publication typeGrant
Publication dateMay 11, 1909
Filing dateApr 7, 1908
Priority dateApr 7, 1908
Publication numberUS 921513 A, US 921513A, US-A-921513, US921513 A, US921513A
InventorsHugh E S Crawford
Original AssigneeHugh E S Crawford
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Backwater cut-off.
US 921513 A
Abstract  available in
Previous page
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Claims  available in
Description  (OCR text may contain errors)




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Specification of Letters latent.

ratented May 11, 1909.

Application filed Aprilv'?, 1908. Serial No. 425,797.

' stream into which the drainage is run is higher than the inlet end oi said drain pipe. The'inventii'in consists in the novel fea-l tures oi" construction hereinafter described, pointed out in the claim and shown'in the accompanying drawings, in which Figure 1 is a plan View of the device.

2 is a side elevation showing the drain in iiioperative position` Fig. 3 is a side elevation showing the drain in operation.

in these drawings i represents a leveel and 2 a drain pipe therethrough, the inlet end -ol which opens into a suitable ditch 3 and the outer end of the drain pipe isprovided with an, elbow 4 which earries'a short pipe section '5.' diseharge'pipe 6 is rotatably mounted upon `the pipe 5 by means of a connectingr elbow? The ipe carries adjacent its ,free end a iioat 8 o sui'licient size and buoyancy to lift the said'pipe 6 into the position shown in Figs. 2 and 3 when the water reaches the levee.

The operation of the device will be readily understood from 'the drawings in which Fig. 1 shows the pipe 6 resting upon a beach as at a time of low water. When the stream rises until its water'level is above that of the land to he drained as in Fig. 2 the ipe G is elevated by the'fioat 8 so that its iscliarge end is out of the water, thus preventing pasand so through the levee. As the water in the stream falls the float 8 will also fall and when the level of the water inthe stream is below the land to be drained the pipe 6 will incline downwardly as shown in Fig. 3 thus permitting discharge of water from the ditch 3 into vthe stream. It will, therefore, be seen that l have provided a drain pipe in which the rise and fall of' the stream into which it empties will automatically regulate the i'ow of water through it.

lHaving thus fully described my invention,

sage of' water through the pipes 6, 5 and 2 what claim as new and desire to secure by.

Letters Patent, is r-f The combination with a levee drain pipe, of a vertically swinging discharge pipe in communication with said drain pipe and means for automatically lifting the discharge ,cn'd of the last mentioned ipe above hi h "water level when said Water evel is above t ie lovelot the said drain pipe, as and for the purpose set vforth.

HUGH E. tS.ACRAVVFORD. l/Vitncsses:


Referenced by
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US3173269 *Oct 13, 1961Mar 16, 1965Norman M ImbertsonCollapsible dam
US4321948 *Jan 22, 1981Mar 30, 1982Bradley Earl HDischarge system for septic tank
US5232307 *Aug 9, 1991Aug 3, 1993Nouri Hasan MHydraulic oscillating diverter
US5403118 *Dec 4, 1992Apr 4, 1995Davis; Michael K.Optimum water retention system for use in agricultural fields
US5829917 *May 6, 1994Nov 3, 1998Maudal; IngeTidal system and method for cleansing a harbor
US6076994 *Feb 11, 1999Jun 20, 2000Rosewood Equipment CompanyMethod and apparatus for providing water from a body of water
US6241877 *Oct 30, 1998Jun 5, 2001Edward B. BerkeyWater gardening system
US6602408Feb 28, 2001Aug 5, 2003Edward B. BerkeyFiltration system for water garden reservoir
DE10152445C1 *Oct 26, 2001Jun 12, 2003Dieter KunzePurge valve for cesspit or rainwater reservoir, has guide tube which pivots to let water out when at high level
DE10212506A1 *Mar 20, 2002Oct 9, 2003Dieter KunzeVentil, insbesondere Spülventil
DE10212506B4 *Mar 20, 2002May 19, 2004Kunze, Dieter, Dipl.-Ing.Ventil, insbesondere Spülventil
Cooperative ClassificationE03F1/002