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Publication numberUS3677294 A
Publication typeGrant
Publication dateJul 18, 1972
Filing dateApr 12, 1971
Priority dateApr 12, 1971
Publication numberUS 3677294 A, US 3677294A, US-A-3677294, US3677294 A, US3677294A
InventorsGibbs James W, Gibbs John L
Original AssigneeMarine Bank And Trust Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Hydraulic flush tank
US 3677294 A
Abstract
A hydraulic assembly for filling and rapidly discharging a liquid from a hermetically sealed tank. The assembly includes a flush tank having a cylindrical sleeve extending vertically therethrough and a tubular axially disposed air vent within the sleeve. A valve means, slidably disposed within the sleeve on the tubular air vent adjacent the lower end thereof, is closed by the normal water line pressure, entering through the top of the sleeve, to hermetically seal the flush tank and the chamber within the sleeve, permitting the pressure therein to build until it balances the water line pressure. Manually operated valve means are provided at the top of the sleeve to open the pressurized chamber within the sleeve to the air vent causing the rapid discharge through the air vent of part of the water within the sleeve chamber, which, because of the pressure differential thus created, opens the valve at the bottom of the sleeve causing a rapid discharge of the pressurized water from the tank.
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United States Patent Gibbs et al.

[54] HYDRAULIC FLUSH TANK [72] Inventors: James W. Gibbs; John L. Gibbs, both of I Hialeah, Fla. 73 Assigneer Marine Bank and mm Company 221 Filed: April 12, 1971 -211 Appl..No.:' 133,242

[52] us. Cl ..l37/572, 4/26, 251/144 511 1111. c1 ..E03d 3/04 58 FieldolSearch ..l37/572,576;25l/l44;4/26, 4/29, 3o,31,47,4s, 50,61,65

5e References Cited UNITED STATES PATENTS 547,505 10/1895 Scott ..4/6l

1,645,264 10/1927 Vergara ....4/26

3,391,408 8/1968 Skoosgaard 26X Primary ExaminerWilliam R. Cline Attorney-John Cyril Malloy [451 July 18, 1972 571' '1 ABSTRACT A hydraulic assembly for filling and rapidly discharging a 1 liquid from a hermetically sealed tank. The assembly includes a flush tank having a cylindrical sleeve extending vertically therethrough and a tubular axially disposed air vent within the sleeve. A valve means, slidably disposed within the sleeve on the tubular air vent adjacent the lower end thereof, is closed by the normal water line pressure, entering through the top of the sleeve, to hermetically seal the flush tank and the chamber within the sleeve, permitting the pressure therein to build until it balances the waterline pressure.- Manually operated valve means are provided at the top of the sleeve to open the pressurized chamber within the sleeve to the air vent causing the rapid discharge through the air vent of part of the water within the sleeve chamber, which, because of the pressure differential thus created, opens the valve at the bottom of the sleeve causing a rapid discharge of the pressurized water from the tank. Y. 4

' 13 came, 6 Drawing figures PATENTEnJuu-amz $677294 sum 2 0F 3 INVENTOR JAMES w. 6/855 Y uoH/v 1.. 6/555 ermRA/EX PATENTED JUL 1 8 I972 3 577; 294

SHEET 3 OF 3 INVENTOR r/HMES LU. 6/555 BY :JOH/V L. 67555 ,4 7 TOR/L/EX STATE OF THE PRIOR ART Most toilet flushing devices now in use depend upon gravitation of water from a tank under normal atmospheric pressure, manual operating means being provided to open a large diameter ball valve which permits the water to flow from the tank to perform the flushing operation. Float means are utilized, first, to open a water inlet valve to refill the tank from a pressurized water supply line and, second, to close the valve when the water in the tank has reached a predetermined level. This type of toilet flushing apparatus is wasteful of water and is not always efiective in forcefully flushing and cleaning the toilet bowl.

BACKGROUND OF THE INVENTION The present invention generally contemplates a hydraulic toilet flushing device which performs a superior flushing operation with a fraction of the amount of water utilized by the gravity type flushing devices commonly in use.

In general, the device of the instant invention provides a primary tank and a secondary tank disposed vertically through said primary tank. A filler tube supplies water to the primary tank through a port in the normally closed upper end of the secondary tank and an air vent tube is axially disposed through the secondary tank in open communication between the atmosphere above and below the primary tank.

Piston valve means are provided adjacent the lower end of the secondary tank to hermetically seal both the primary and secondary tanks by utilizing the normal line pressure entering through the filler tube. A bypass valve is provided in the piston valve means to permit the water from the filler tube to flow through the secondary tank into the primary tank whereby both the primary and secondary tanks are filled with water to a point where the pressure in both tanks balances or is equal to the source pressure supplied by the filler tube.

A manually operated valve means is provided atop the secondary tank which opens said tank to the air vent tube causing a rapid loss of pressure therein with resulting partial discharge of water therefrom through the air vent tube. Simultaneously, an imbalance in pressure is created between the primary and secondary tanks which instantaneously opens the piston valve means discharging the pressurized water from the primary tank as a slug. In this manner a relatively small amount of water performs a flushing operation which is far superior to a gravity flushing operation performed by to times the amount of water.

BRIEF DESCRIPTION OF THE DRAWINGS.

FIG. 1 is a longitudinal side view of the water flushing tank DETAILED DESCRIPTION OF THE INVENTION With reference to the drawings in which like reference nu- I merals designate like or similar parts throughout the various views and with particular reference to FIGS. 1 and 2, the numeral l0 designates a tank which includes conventional means 12 to slidably receive bolts for attachment to a toilet bowl. A sleeve member 14, fixed to and extending vertically through the tank 12, carries a manually operated valve assembly 16 in enclosing relation to the upper end 18 thereof and a filler tube 20, extendingfrom a pressurized water source across a check valve 22 is connected to the valve assembly 16 and supplies water to the tank assembly.

With particular reference to FIG. 3, the tank 10 provides a primary water chamber 24, and the sleeve member 14 provides a secondary water chamber 26. An air vent tube 28 extends vertically, axially through the secondary water chamber 26 and-communicates with the atmosphere above andbelow the tank 10.

The open lower end of the sleeve 14 carries a member 30 providing a seat 32 for a piston valve 34. This member 30 as illustrated fragmentarily in FIGS. 3 through 6 may comprise a portion of a connection fitting to a toilet bowl through which the flush water is conventionally conveyed to the bowl.

With further reference to FIG. 3, the piston valve includes a lower annular flange 36 having an elastomer ring portion 38 for sealing engagement with the valve seat 32. Spaced above the annular flange portion 36 of the piston valve and connected thereto by a reduced diameter neck portion 40 is an enlarged head portion 42.

The piston valve 34 is provided with a vertical through opening 44 for sliding engagement along the air vent tube 28 and as illustrated the enlarged head portion 42 is slidably received within the secondary water chamber 28 provided by the sleeve 14. O-rings 46 and 48 in the through opening 44 and around the head portion 42 provide respective water seals between the air vent tube 28, piston valve 34 and the inner wall of the sleeve 14.

A plurality of port openings 50 are circumferentially spaced about the lower end of the sleeve 14, and, as illustrated in FIG. 3, the only communication between the primary water chamber 24 and the secondary water chamber 26, when the piston valve is seated, is through the openings 50 and a by-pass valve 52in the valve head 42. The by-pass valve 52 is normally open under the influence of a tension spring 54 when the pressures above and below the head 42 of thepiston valve 34 are substantially equal.

With further reference to FIG. 3, the manually operated valve assembly 16 is fixed in enclosing relation to the upper end of the sleeve 14 as by the screw thread means 54. The filler tube 20 opens into a chamber 56 in the valve assembly 16 which, in turn, communicates with the secondary water chamber 26 in the tube 14 through a port 58.

A slide valve 60 extends longitudinally through the valve assembly housing, comprised of top and bottom portions 62 and 64. The central portion 66 of the slide valve provides an internal cavity 68in communication between a pair of spaced apart ports 70 and 72 and said central portion 66 extends through a bore 74 provided with three spaced apart O-rings 76, 78 and 80. A port 82 communicates between the secondary water chamber 26 in tube 14 and the portion of the bore 74 between the Orings 76 and 78.

The slide valve includes a reduced diameter outer portion between an enlarged annular flange 88 and the inner end of a compression adjustment screw 90. The screw 90 is threaded into the valve assembly housing and provides a through bore 92 for the outward extending portion 93 of the slide valve 60.

The annular flange 88 is slidably engaged in an enlarged inner diameter portion 95 of the bore 74, said portion 95 being of a predetermined length to establish the amount of axial movement of the slide valve 60.

With continued reference to FIG. 3, the slide valve 60 includes a slightly reduced diameter inner end 93 extending across a vertical bore 94 into sliding engagement with an O- ring 96 in a relatively short bore 98 which communicates with the chamber 56 and the port 58.

The vertical bore 94 provides screw thread attachment means 100 adjacent its lower end for the air vent tube 28, and a check valve 102 opening upwardly therefrom to the atmosphere is provided at the upper end of the bore 94.

OPERATION OF THE INVENTION FIG. 3 illustrates the device in a fully charged and pressurized condition. Water supply tube 20 is illustrated opening into the primary water chamber 24 of the tank 10 via chamber 56, port 58, secondary water chamber 26, check valve 52 and the port openings 50. Therefore, the pressure in the entire system is balanced relative to the pressure of the water from the source as provided through the supply tube 20 and check valve 22.

FIG. 4 illustrates the flushing operation. Arrow 110 indicates that the slide valve 60 has been moved manually inwardly until the secondary water chamber 26 is in communication with the air vent 28 via ports 82 and 72, cavity 68, port 70 and bore 94. In this condition the pressure in the secondary water chamber is released and at least a portion of the water therein is discharged downwardly through the air vent tube 28. instantaneously, the pressure on the top side 112 of the piston valve 34 is released permitting the upward pressure indicated by the arrows 114 to close the by-pass valve 52 and to move the piston valve 34 upwardly from the valve seat 32 whereby the water under pressure in the primary chamber 24 is discharged through the ports 50 as a slug of water which will sweep everything in its path.

As further illustrated in FIG. 4, when the push valve 60 is fully depressed, water from the supply tube 20 continues to enter the secondary water chamber 26 around the reduced diameter end 93 of the slide valve 60 via a small bypass port 120. When the inward pressure on the valve 60 is released, the water pressure from the supply tube 20 reacts on the inner end 122 of the slide valve 60 to provide a partial return thereof as indicated in FIG. 5. I

Water pressure from the supply tube 20 is now flowing through the chamber 56 and port 58 into the secondary water chamber 26, creating sufficient pressure on the top surface 112 of the piston valve to reseat same on seat 32. By-pass valve 52 reopens permitting the water from the supply tube to enter the primary water chamber 24 to rebuild the pressure in both the primary and secondary water chambers.

With further reference to FIG. 5 it will be apparent that the slide valve, as previously stated, has not returned to its initial position. Valve port 82 from the secondary water chamber is partially open to the air vent 28 via port 72, cavity 68 and port 72 to permit a small portion of the water, entering the secon dary water chamber from the supply tube, to pass through the air .vent tube to refill the toilet bowl to a predetermined level. The spring compression adjustment screw 90 provides means for properly adjusting the resistance forces of the spring 86 to permit the water pressure to close the slidevalve 60 at the proper time. As the pressure within the system increases under the influence of the source pressure, the slide valve 60 slowly closes against the forces of the spring 86 and as illustrated in FIG. 6, when the slide valve is completely closed, all of the water from the supply tube 20 is directed into the primary'and secondary water chambers whereby the air in the primary chamber is compressed until a state of pressure equilibrium is reestablished in the system as illustrated in FIG. 3, the air supply in the primary chamber 24 being replenished by the air vent tube 28 after each flushing operation.

This balanced condition remains until the slide valve is once again depressed as at 110, and when the source pressure is in the range of 40 to 60 pounds per square inch for example, the flushing operation is practically instantaneous with the actuation of the slide valve and the water from the primary chamber 24 rushes out as a slug of water and accomplishes a most efficient flushing operation.

While a preferred form of the instant invention has been illustrated and described, it will be obvious to those skilled in the art that various modifications and changes can be made therein without departing from the true spirit of the invention as defined by the appended claims.

What is claimed is:

l. A hydraulic flush tank assembly comprising,

A. a main tank providing,

l. a pressure scalable primary liquid storage chamber; B. a sleeve means fixed to and extending vertically through said tank providing, 1. a secondary liquid storage chamber, 2. an open lower end comprising a discharge outlet, 3. 'a valve seat above and adjacent to said discharge outlet,

4. apertures, above and adjacent to said valve seat, providing communication between said primary and secondary storage chambers;

C. an air vent tube, extending axially through said sleeve means, opening to the atmosphere above and below said tank;

D. means to enclose the top of said secondary liquid storage chamber; I v

E. a pressure actuated piston valve means slidably disposed in said secondary liquid storage chamber which is actuwith the liquid until a state of pressure equilibrium exists relative to the source,

G. manually operated valve means which is operable to open said secondary liquid storage chamber into said air vent tube to destroy' the state of pressure equilibrium causing said by-pass valve to close and said pressure actu ated piston valve means 'to open in response to upward pressure whereby said primary liquid-storage tank is opened to the atmosphere through said apertures and discharge outlet, permitting the pressurized liquid therein to be very rapidly discharged.

2. A hydraulic flush tank assembly as defined in claim I in which said means to enclose comprises the valve body of said manually operated valve means including a connection means for said inlet conduit and a port means from said inlet conduit to said secondary liquid chamber.

3. A hydraulic flush tank assembly as defined in claim 2 including a check valve in said inlet conduit.

4. A hydraulic flush tank assembly as defined in claim 2 in which said manually operated valve means comprises a slide valve movable between an extended position and a depressed position and providing port means which are closed when said slide valve is in said extended position and in open communication between said secondary storage chamber and air vent tube in said depressed position.

5. A hydraulic flush tank assembly as defined in claim 4 in which said slide valve includes an inner end surface and said connection means are positioned relative to said inner end surface whereby said pressurized liquid is directed thereagainst to move said slide valve to and maintain it in its extended position except when said slide valve is manually depressed.

6. A hydraulic flush tank assembly as defined in claim 5 including a compression spring to partially counterbalance the pressure exerted on said inner end surface whereby said port means are maintained in a partially opened condition until a predetermined degree of pressurization has been attained in said primary and secondary storage chambers.

7. A hydraulic flush tank assembly as defined in claim 6 in- I cluding compression adjustment means for said compression spring.

8. A hydraulic flush tank assembly as defined in claim 7 in which said slide valve includes an enlarged annular flange and said compression adjustment means comprises a nut threaded into said valve body, said compression spring being circumposed about said slide valve between said enlarged annular flange and said nut, said nut being provided with a central through bore and said slide valve having a portion extending outwardly through said bore for manual manipulation.

9. A hydraulic flush tank assembly as defined in claim 8 in which abutment means are provided in said valve housing to cooperate with said enlarged annular flange to establish said extended and depressed positions.

including seal means between said piston valve, and the wall of said secondary liquid storage chamber and air vent tube.

12. A hydraulic flush tank assembly as defined in claim 10 in which said by-pass valve extends through said enlarged head portion between said secondary and primary liquid storage chambers.

13. A hydraulic flush tank assembly as defined in claim 1 including a check valve at the upper end of said air vent tube to prevent an upward discharge of liquid therefrom.

l i I I

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US547505 *Apr 2, 1798Oct 8, 1895 Slow-closing valve
US1645264 *Oct 12, 1926Oct 11, 1927Juan VergaraFlushing apparatus
US3397408 *Aug 24, 1965Aug 20, 1968Chris Skousgaard EWater closet
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3792497 *Jul 28, 1972Feb 19, 1974Robbins RCombined vented storage/pressure discharged tank for water closets or urinals
US3813701 *Dec 18, 1972Jun 4, 1974Stevens EWater-conserving pressure converter
US3817279 *Aug 17, 1972Jun 18, 1974Water Control ProductsFluid control mechanism
US3817286 *Aug 17, 1972Jun 18, 1974Water Control ProductsHydraulic flush tank with improved seating and resealing means
US3817489 *Aug 17, 1972Jun 18, 1974Water Control ProductsHydraulic flush tank with improved seating and resealing means
US3890651 *Mar 11, 1974Jun 24, 1975Wood Robert ArnoldPressure tank water closet system
US4075718 *Apr 3, 1975Feb 28, 1978Hargraves William JNozzle flush system
US4143433 *Mar 17, 1978Mar 13, 1979Skousgaard E ChrisWater closet
US4176821 *Oct 12, 1978Dec 4, 1979Georg Rost & SohnePilot-operated valve assembly
US4233698 *Jan 28, 1977Nov 18, 1980Water Control Products/N.A., Inc.Pressure flush tank for toilets
US4584726 *Jul 9, 1984Apr 29, 1986Kaiser Aerospace & Electronics Corp.Fluid operated waste tank servicing assembly
US4861167 *Sep 28, 1988Aug 29, 1989Cornell Research Foundation, Inc.Line-heat-source thermal conductivity measuring system
US4882792 *Apr 11, 1988Nov 28, 1989Vincent Ray TAuto-dump flow controller
US4955921 *Feb 14, 1990Sep 11, 1990American Standard Inc.Flushing mechanism using phase change fluid
US4984311 *Nov 30, 1989Jan 15, 1991American Standard Inc.Flushing mechanism with low water consumption
US5005226 *May 11, 1990Apr 9, 1991American Standard Inc.Flushing mechanism with low water consumption
US5046201 *Apr 16, 1990Sep 10, 1991Kohler Co.Pressurized flush toilet tank
US5241711 *Jun 24, 1991Sep 7, 1993Badders Edwin TPressurized toilet flushing assembly
US5361426 *Apr 16, 1993Nov 8, 1994W/C Technology CorporationHydraulically controlled pressurized water closet flushing system
US5435019 *Sep 2, 1993Jul 25, 1995Badders; Edwin T.Pressurized toilet flushing assembly
US5553333 *Aug 17, 1994Sep 10, 1996Andersson; Sven E.Pressurized water closet flushing system
US5652969 *Aug 25, 1995Aug 5, 1997Taylor; Raymond J.Flush apparatus for use with toilet odor venting apparatus
US5797582 *Nov 10, 1994Aug 25, 1998Simoens; HerveDistribution device for feeding a capacitor with gaseous fluid
US5970527 *Mar 4, 1998Oct 26, 1999W/C Technology CorporationPressurized water closet flushing system
US6343387Dec 6, 2000Feb 5, 2002W/C Technology CorporationVolume control for a water closet
US6370707 *Jan 16, 2001Apr 16, 2002Arichell Technologies, Inc.Supply-line-sealed flush controller
US6425145Sep 21, 2001Jul 30, 2002Arichell Technologies, Inc.Push button for metered flow
US6453479 *Jan 16, 2001Sep 24, 2002Arichell Technologies, Inc.Flusher having consistent flush-valve-closure pressure
US6550076 *Sep 28, 2001Apr 22, 2003Sloan Valve CompanyValve assembly for a pressure flush system
US6732997Apr 6, 2001May 11, 2004The Chicago Faucet CompanyControl valve for a water closet
US6896237May 27, 2003May 24, 2005Geberit Technik AgControl valve for a water closet
US6934976May 19, 2003Aug 30, 2005Arichell Technologies, Inc.Toilet flusher with novel valves and controls
US7562399Oct 8, 2004Jul 21, 2009Arichell TechnologiesToilet flusher for water tanks with novel valves and dispensers
US20040021110 *May 27, 2003Feb 5, 2004Beh Thomas P.Control valve for a water closet
US20040025238 *May 19, 2003Feb 12, 2004Arichell Technologies, Inc.Toilet flusher with novel valves and controls
US20050133754 *Oct 8, 2004Jun 23, 2005Parsons Natan E.Toilet flusher for water tanks with novel valves and dispensers
US20050161625 *Mar 16, 2005Jul 28, 2005Beh Thomas P.Adjustable metering actuator assembly for a water closet
USRE32750 *Mar 30, 1987Sep 20, 1988Kaiser Aerospace & Electronics CorporationFluid operated waste tank servicing assembly
USRE37921Oct 24, 2000Dec 10, 2002W/C Technology CorporationPressurized water closet flushing system
DE4411992A1 *Apr 8, 1994Oct 20, 1994W C Technology CorpDruckwasser-Spülklosettsystem
DE4411992C2 *Apr 8, 1994Oct 12, 2000W C Technology CorpSpülventil für eine Klosettspülvorrichtung
DE4412989A1 *Apr 15, 1994Oct 20, 1994W C Technology CorpHydraulisch gesteuertes Druckwasser-Klosettspülsystem
DE4412989C2 *Apr 15, 1994Sep 14, 2000W C Technology CorpKlosettspülvorrichtung
EP0677621A1Nov 19, 1990Oct 18, 1995American Standard Inc.Flushing mechanisms
WO1979000780A1 *Dec 1, 1978Oct 18, 1979E SkousgaardWater closet
Classifications
U.S. Classification137/572, 4/354, 251/144, 4/363
International ClassificationE03D3/00, E03D3/04
Cooperative ClassificationE03D3/04
European ClassificationE03D3/04
Legal Events
DateCodeEventDescription
Dec 24, 1986AS02Assignment of assignor's interest
Owner name: MOLMEC, INC.
Owner name: WATER CONTROL PRODUCTS, INC., A DE CORP
Effective date: 19861223
Dec 24, 1986ASAssignment
Owner name: WATER CONTROL PRODUCTS, INC., A DE CORP
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST. RELEASE OF SECURITY INTEREST IN SAID PATENTS RECORDED AT REEL 3915 FRAMES 843-846.;ASSIGNOR:MOLMEC, INC.;REEL/FRAME:004658/0683
Effective date: 19861223
Oct 16, 1981AS07Mortgage
Free format text: MOLMEC, INC., 4205 MARTIN ROAD, WALLED LAKE, MI A CORP. OF MI * WATER CONTROL PRODUCTS, INC., A CORP. OF DE : 19810831
Oct 16, 1981ASAssignment
Owner name: MOLMEC, INC., 4205 MARTIN ROAD, WALLED LAKE, MI A
Free format text: MORTGAGE;ASSIGNOR:WATER CONTROL PRODUCTS, INC., A CORP. OF DE;REEL/FRAME:003915/0843
Effective date: 19810831
Jun 12, 1981AS02Assignment of assignor's interest
Owner name: WATER CONTROL PRODUCTS, INC., 2820-224 WEST MAPLE
Owner name: WOOD, JOHN T.
Effective date: 19810602
Jun 12, 1981ASAssignment
Owner name: WATER CONTROL PRODUCTS, INC., 2820-224 WEST MAPLE
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:WOOD, JOHN T.;REEL/FRAME:003860/0823
Effective date: 19810602