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Publication numberUS3698019 A
Publication typeGrant
Publication dateOct 17, 1972
Filing dateJul 2, 1971
Priority dateJul 2, 1971
Publication numberUS 3698019 A, US 3698019A, US-A-3698019, US3698019 A, US3698019A
InventorsCulp Duane
Original AssigneeCulp Duane
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Pressure discharge waste disposal apparatus
US 3698019 A
Abstract
The present invention is an improvement on the construction shown in U.S. Pat. No. 3,566,415, issued to me on Mar. 2, 1971. The toilet structure is substantially the same as in the patent and the improvement resides in controls for water and air used in flushing the toilet and removing waste therefrom.
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Description  (OCR text may contain errors)

United States Patent Culp 451 Oct. 17,1972

154] PRESSURE DISCHARGE WASTE DISPOSAL APPARATUS [72] Inventor: Duane Culp, PO. Box 345, North Lima, Ohio 44452 [22] Filed: July 2, 1971 [21] Appl. No.: 159,404

[52] US. Cl. ..4/l0, 4/76, 4/79 [51] Int. Cl. ..E03d 7/36, E03d 1/30, E03d 3/10 [58] Field of Search ..4/l0, 77, 79, 89, 90, 87, 76,

[56] References Cited UNITED STATES PATENTS Sweeny ..4/77 Agra ..4/77

2,501,510 3/1950 Gross, Jr ..4/77 2,768,386 10/1956 Graef et al. ..4/77 X 2,886,826 5/1959 Shaleen ..4/10 3,184,761 5/1965 Broughton ..4/90 3,214,772 11/1965 Roberts et a1. ..4/79

Primary Examiner-Samuel B. Rothberg Assistant Examiner-Henry K. Artis Attorney-Michael Williams 57 ABSTRACT The present invention is an improvement on the construction shown in US Pat. No. 3,566,415, issued to me on Mar. 2, 1971. The toilet structure is substantially the same as in the patent and the improvement resides in controls for water and air used in flushing the toilet and removing waste therefrom.

13 Claims, 7 Drawing Figures PRESSURE DISCHARGE WASTE DISPOSAL APPARATUS BACKGROUND AND SUMMARY In my U.S. Pat. No. 3 566 415, I have disclosed electrically actuated controls for the water and air used in flushing the toilet and removing waste therefrom. Such controls have operated satisfactorily, and with proper installation the apparatus was safe for use in the intended manner.

The present invention provides a manually initiated, hydraulic flush cycle control which does not require the electrical controls of said patent and is more simple, more reliable and less expensive to manufacture. In addition, the present invention eliminates any possible hazard which may result from careless installation of electrical controls and therefore meets the. present-day requirements for product safety.

DESCRIPTION OF THE DRAWINGS In the drawings accompanying this description and forming a part of this specification, there is shown, for purpose of illustration, an embodiment which my invention may assume, and in these drawings:

FIG. 1 is a vertical sectional view of the toilet structure with the piping shown in diagrammatic manner,

FIG. 2 is an enlarged, sectional view of certain valves of the improved control, with the piping again shown in diagrammatic manner,

FIG. 3 is a plan view corresponding to the line 33 of FIG. 2,

FIG. 4 is a fragmentary sectional view corresponding to the line 44 of FIG. 2, showing the valve in one position,

FIG. 5 is a view similar to FIG. 4 but showing the valve in another position,

FIG. 6 is a sectional view corresponding to the line 6-6 of FIG. 2, showing valve parts in one position, and

FIG. 7 is a view similar to FIG. 6 but=showing the valve parts in another position.

DISCLOSURE OF PREFERRED EMBODIMENT Reference is made to my patent 3 566 '415 and the same parts herein disclosed will be given the same numerals as in the patent to facilitate cross reference. For the purpose of this disclosure a brief description of certain parts of the patent will be sufficient.

Generally, and as in the patent, the pressure.

discharge toilet comprises a hollow base 10, preferably cylindrical. Seated upon and suitably gasketed to the open top of the base 10 is a receptacle or toilet bowl 13 into which the user discharges his waste. The bowl 13 may be secured to the top of the base 10 by means of studs 11 and nuts 12.

The receptacle has downwardly and inwardly sloping walls in the manner of a cone, and has an opening 14 at the lower end. The upper open rim of the receptacle is margined by a rounded hollow rim 15, for the comfort of the user and for a purpose to appear.

Normally closing the receptacle opening 14 is a generally spheroid valve head 16 formed of flexible, yet

tough, material, such as rubber reenforced with a tough fabric or the like. As seen in FIG. 1, the valve head is of ample size to close and seal the receptacle opening 14.

The valve head 16 is connected to the upper end of a plunger 17 and the latter is vertically reciprocable within a bore 18 of a housing 19. The lower end of the 1 housing is reduced in diameter and passes through an opening in the floor of the hollow base 10, and a cap 20 is threaded onto-the protruding lower end to hold the housing firmly in position, a suitable gasket being interposed between-the inner surface of the base floor and the shoulder formed by the reduced lower end to prevent leakage. The housing bore 18 is sealed against leakage of fluid outwardly through itsupper end by a conventional O-ring 21.

' Disposed at an intermediate portion of the housing 19 and extending transversely thereof is cylinder 22 (which may be integral with the. housing 19). Opposite ends of the cylinder are closed by end caps 23, 24 which are threaded thereon. Slidably disposed within the cylinder 22 is a latch member 25 which is constructed and mounted for actuation in the mannershown inmy said patent. As before, a conduit 31 is connected to the cap member 24 to admit fluid under pressure to the interior of the cylinder to move the latch member to the left, and a spring, not herein shown, but disclosed in said patent, urges the latch member to the right.

A rounded shield 33 is connected to the upper part of the plunger housing 19 and extends to the floor of the hollow base 10 to enclose the housing, the cylinder 22and its end caps 23, 24 to prevent waste from accumulating thereon.

A waste outlet conduit 35 communicates with the interior of the hollow base 10 adjacent to its floor and at the outer periphery thereof. Conduit 35 extends upwardly, in the disclosed embodiment, for connection to a sewer line (not shown). Extending between a portion of the conduit 35 and an upper portion of the hollow base 10 is a branch conduit 36 in which is replaceably disposed a rupture disc 37 having a small aperture 38, the disc and aperture being for the purpose mentioned in said patent.

Disposed within the hollow base 10 is a fluid discharge nozzle 39 arranged to discharge fluid tangentially of the base so as to impart a swirling motion thereto. Further, nozzle 39 is preferably disposed to direct fluid across the entrance to the waste outlet conduit 35 to prevent clogging of the latter. It will be appreciated that several nozzles, like nozzle 39 may be employed, preferably disposed within the hollow base in circumferentially spaced relation.

Extending between the nozzle 39 and the cap 20 is a conduit 40 which establishes communication of each with a source of water under pressure from a conduit leading from a control housing 101. A conduit 45 has its upper end in communication with the interior of the hollow rim l5 and its lower end connected to a conduit 102 which also leads from the control housing 101.

The control housing is divided into chambers 103, (see FIG. 2) by a partition 105. Opposite ends of the housing 101 are closed by end caps 106, 107 which, like the'partition 105, are sealed against fluid leakage in any suitable manner.

The inner surface of end cap 107 is accurately machined to closely but slidably fit with a like machined under surface of a rotatable control disc 108.

- Ports 109 and 110 are formed in the end cap 107 and the disc, the opening 112 is aligned with the port 110 and with the disc closing port 109.

A shaft 113 is supported for rotation by the end cap 106 and thepartition 105 and has its lower 'end pressed against the upper surface of the disc 108 by means of a spring 1 14 which is disposed between the inner surface of the end cap 106 and the upper end of a cam 115 which is keyed to the shaft. The pressure exerted bythe lower end of the shaft 113 against the disc 108 maintains the machined surfaces of the disc and end cap 107 in fluid tight relationship.

A circular plate 116 is fixed to the shaft and has openings to pass drive pins'1l7 extending upwardly from the disc 108. An operating lever 118 is fixed to the upper end of the shaft 113 and is swingable between two positions (see FIG. 3) which are determined by stops 119, 120 fixed to and extending upwardly from the end cap 106. The operating lever 118 is disposed within easy reach of a person using the toilet.

Communicatingwith the interior of the chamber 103 is a conduit 121 which forms part of a pilot valve casing v122. This casing is shown as a one-piece construction although it will preferably be made as a fabrication of parts. A conduit 123 leads from the casing 122 at right angles to the conduit 121 for a purpose to appear. A

valve seat member 124 is fixed within the conduit 121 and has its end engageable with a valve head 125 which is positioned in communication with the conduit 123.

The valve head 125 is carried by a valve rod 126 which terminates in an inner fluted end 127 guided for reciprocation by the inner wall of the conduit 121. Extending from the opposite side of the valve head is a pusher member 128 bearing against a rubber piston 129 which is backed by a metal disc 130, the piston and disc sliding within an enlarged part of the valve casing 122. An end cap 131 closes the end of this enlarged part and a conduit 132 is adapted to establish communication between the interior of such enlarged part and the discharge line of an air compressor 133 (see FIG. 1

A diaphragm valve 134 forms part of the combination disclosed herein and is formed in halves 135, 136 between which a flexible diaphragm 137 is clamped to form chambers 138 and 139. A water pipe 140 leads from the center of the half 136 and establishes communication between the chamber 139 and a source of water supply, such as a commercial water main schematically shown at 141. A hand valve schematically shown at 142, controls flow of water from the main 141.

A pipe 143 of smaller diameter than the pipe 140 establishes communication between the central part of the chamber 138 and the water pipe 140, the connection being schematically shown at 144. A ported disc 145 is disposed within that part of the pipe 143 which is in communication with the chamber 138.

A water pipe 146 is in communication with the chamber 138, in off-center relation therewith, and is connected with the conduit 123 of the pilot valve casing 122, as shown by the dash line 147. A further water pipe 148 is in communication with the chamber 139, in off-center relation therewith and isconnected with a conduit 149 leading to the chamber .104 of the control housing 101, the connection being shown by the dash line 150. The connection 150 also leads to the conduit 31 extending from the end cap 24 of the latch cylinder 22.

OPERATION When all connections have been made, the valve 142 leading from the water main 141 is opened. In nonoperative relation of the toilet, the operating lever 118 is in the full line position shown in FIG. 3 and the valve head 125 (FIG. 4) is shown closing the valve seat member 124. With the lever 1 18 in its full line position, opening 111 of the disc 108 is in alignment with port 109, while port is closed by the control disc. Since the valve head (FIG. 2) is now tightly engaged against the valve seat member 124, water under pressure will build up in diaphragm chamber 138 and in the conduit 123. Since the effective area of the side of the diaphragm 137 in chamber 138is greater than the effective area of the opposite side of the diaphragm, the latter will remain in its full position, despite the fact that equal water pressure exists in conduit 140, until the toilet user actuates the operating lever 118. Also,

operating lever 118 and rotates it toward the dash line position shown in FIG. 3. With reference to FIG. 4, it will be noted that the cam 115 will engage the inner 'end of the fluted valve guide 127 shortly after the operating lever 118 is moved, to unseat the valve head 125, whereupon the water pressure in the diaphragm chamber 138 is lowered and the diaphragm 137 will snap to its dash line position to restrict the flow from the inner end of pipe 143 and provide for flow of water from pipe 148, through connection to conduit 149. Water from the chamber 138 and pipe 123 may flow through a conduit 152 to a suitable drain.

When the operating lever 118 has been completely moved to its dash line position in FIG. 3, the opening 112 in control disc 108 will be aligned with port 110 and water under main pressure will flow through conduits 102 and 45 to the interior of the hollow rim 15, and such water will flow down the interior wall of the bowl 13, preferably with a swirling action, to flush downwardly any waste which might have accumulated on the bowl wall.

Since the connection 150 also leads to the conduit 31 extending from the end cap 24 of latch cylinder 22, the latch plunger 25 will be driven to the left from its position in FIG. 1 so as to withdraw it from engagement with the lower end of valve head plunger 17. Since the port 111 (FIG. 2 is now closed by the control disc 108, no water pressure exists in conduit 40 and therefore the plunger 17 and its valve head 16 will drop, under the influence of gravity and the weight of the waste and water above it, to the dash line position shown in FIG. 1, which position corresponds to that shown in FIG. 2 of my said patent. The waste and water will therefore drop I to the bottom of the hollow base 10.

The operating lever 118 is held in the dashline position shown in FIG. 3 for a very short time to continue the flushing of waste from the how] 13 and thereafter will be returned to its full line position shownin FIG. 3. The operating lever may be returned manually by .the user, or may be spring-returned, a suitable delay device (not shown) being provided to retard return of the operating lever 118 for the proper interval.

As the operating lever returns from dash line to the full line position of FIG. 3, the pilot valve head 125 will remain open because the waterunder pressure flowing through the conduit 123 will be now operating against the larger affective area on the left hand side (FIG. 2) of the head 125, and thereforethe diaphragm 137 will also remain in its dash line position. 1

However, the opening 111 of thecontrol disc 108 is now in alignment with the port 109 and therefore water now flows through conduits 100 and 40 to issue'from discharge nozzle 39. The water also enters cap.20 and bore 18 to drive plunger 17 upwardly and seat the valve head 16 to close the lower end of the bowl.

As the water continues to issue from discharge nozzle, its swirling action will tend to breakup any solid matter and also such water will build up a static head pressure in the hollow base toa point where a pressure responsive switch 154 (see FIG. 1) will beactuated. The pressure responsive switch -l54 comprises a housing 155 divided into chambers 156, 157 by a diaphragm 158. The chamber 156'is connected to the atmosphere by means of a port 159, whereas the chamber'158 is connected to the upper interior of the hollow base 10 by a conduit 160. An operating rod 161 is connected to the diaphragm by nuts 162 and is slidable through an adjusting sleeve 163 which-is threaded into a wall of chamber 156. A coil spring l64 is.interposed between the sleeve 163 and the nut 162 within the chamber 156 and the pressure exerted by the spring against the diaphragm 158 may beadjusted by the sleeve 163 to determine a selected pressure setting for actuating the diaphragm from its normal full lineposition to the dotted line position.

An electrical snap switch 165 is carried by the switch housing 155 and has an operating member 166 moved to the full line position shown by the operating rod 161. The switch 165 is connected in electrical circuit'with the motor of the air compressor 133 and when-the static head pressure in the hollow base 10 exceeds the setting of the pressure diaphragm 1158, the latter will snap to its full line position, thus causing the operating rod 161 to move the switch operating member 166 to full line position to close contacts (not shown) in the switch 165 and affect operation of the compressor motor.

With the compressor motor operating, compressed air under pressure will flow through conduit 132 to positively shift the pilot valve to the left (FIG. 2) and thus cause valve head 125 toseat on and'close valve seat member 124. Simultaneously, the water pressure in pipe 143 will shift the diaphragm 137 to its full line position. Therefore, flow of water throughpipe l48, line 150 and conduit 149 will be interrupted and no further water will be discharged from discharge nozzle 39. Also, since water under pressure is now interrupted in the conduit 31, the latchplunger 25 will be springpressed to dispose it under the end of plunger 17 to 6 lock the valve head 16 in position to close the lower end of the bowl 13.

The air compressor 133 also has a discharge line 170, shown in dash lines in FIG. 1, to the discharge nozzle .39 and now air .under pressure, rather than water, willissue from the nozzle to continue to swirl and agitate the waste and water within the hollow base 10. When airpressure within the base exceeds the pressure head within the conduit 35, the waste and water will be forced from the base andinto and through the conduit 35 for ultimate discharge into a sewer line. This action will continue-until all waste and water has been forced through the conduit, and when this is accomplished, the pressure in the hollow base will be reduced to a point where the spring 164 of the pressure responsive switchwill snap the diaphragm 158 todotted line position so that the switch operating member 166 will return to its dotted line position to open the electrical contacts in the switchl65 and break the circuit to the compressor motor. The toilet has now been cleansed of all waste and water and is in condition for reuse.

'1 claim:

l. A pressure discharge waste disposal device for use where wastemust be discharged upwardlyagainst the force of gravity oragainst a head of pressure, said device including a receptacle for receiving waste, means forming a chamber beneath said receptacle for receivingthe waste from the latter through an opening therebetween, a valve for controlling flow of wastethrough said opening, and a waste pipe communicating with said chamber and through which waste is forced a first valve havinginlet means connected to a source of water under pressure, and having two outlets,

a second valve having an inlet connected to one of the outlets of said first valve,

a third valve having an inlet connected to the other outlet ofsaid first valve and having two outlets,

said third valve having avalve head which is shiftable to two positions, one or the other position providingfor water flow through an outlet while blocking waterflow through the other outlet, one outlet being connected to said receptacle and the other being connected to the chamber beneath said receptacle,

said second valvebeing operable to shift the valve head in said first valve to establish water flow t the inlet of said third valve,

and means forforcibly removing waste andwater from the chamberbeneath said receptacle through said waste pipe.

2. The construction according to claim 1 wherein said second valve has an outlet connected to a drain.

3. The construction according to claim 1 and includinga manuallyoperable member for shifting the valve head of said second valve.

-4. The construction according to claim 3. wherein to a sewer, the. improvement comprising:

. an upper position blocking flow of waste through said opening and in -a lower position permitting flow of waste, I

a pressure responsive device for latching said stopper valve in upper position, said device having a water connection with said one outlet of said third valve so that water flowing through the latter will also exert a pressure on said pressure responsive device to shift the latter and .unlatch said stopper valve to permit the latter to move to its lower position.

7. The construction according to claim 6 wherein said pressure responsive device is spring-pressed to latching position and wherein said other outlet of said third valve also has a waterconnection to a cylinder in which the rod carrying said stopper valve is vertically reciprocable, whereby when water is flowing to the chamber beneath said receptacle, the water pressure in said cylinder urges said stopper valve to its upper position and said pressure responsive device engages said rod to hold said stopper valve in its upper position.

. 8. The construction according to claim 1 wherein the valve head of said third valve is connected'to an operating shaft which-has a handle manually moved to one position by the user of said waste disposal device and returned from said one position after an interval of time, said shaft having a cam for opening the valve head of said second valve when said handle is moved to 'saidone position to thereby shift the valve head of said first valve to establish water flow to the inlet of said third valve and simultaneously shift the valve head of said third valve to cause water to flow to said receptacle,

said'cam being moved out of engagement with the valve head of said second valve when said handle is returned from said one position and this valve head being held closed by water pressure while the valve head of said third valve is moved to interrupt water flow to said receptacle and establish water flow to the chamber therebeneath. a 9.7The construction according to claim 8 wherein the valve controlling flow of waste through the opening between said receptacle and the chamber therebeneath is of the stopper type which is vertically shiftable and in an upper closed position blocking flow of waste through said opening and in a lower open position permitting flow of waste, I

means for opening said stopper valve when water is flowing to said receptacle and for closing said stopper valve when water is flowing to the chamber beneath said receptacle, water flowing into said chamber building a pressure therein, means responsive to a predetermined pressure within said chamberto interrupt further water flowto said chamber and cause compressed air to flow to said chamberto force waste therein through said waste pipe. v 10. The constructionaccording to claim 9 wherein flow of compressed air simultaneously seats the valve head of said second valve and the latter causes shifting of the valve head of said first valve to block flow of water to the inlet of 'said third valve.

11. A pressure discharge waste disposal device for use where waste must be discharged upwardly against the force of gravity or against a head of pressure, said device including a receptacle for receiving waste, means forming a chamber beneath said receptacle for receiving the waste from the latterthrough an opening therebetween, a valve forcontrolling flow of waste through said opening, and a waste pipecommunicating with said chamber and through which waste is forced to a sewer, the improvement comprising:

a diaphragm valvehaving both chambers to a source of water under pressure, the diaphragm of said valve in one position interrupting flow of water to one chamber and in another position interrupting flow of water to the other chamber,

first valve means having fluid connection with said other chamber and including a valve head which in closed position blocks flow of water in said fluid connection to build up fluid pressure in said other chamber to cause said diaphragm to move to position wherein it interrupts flow of water to said one chamber,

second valve means having afirst fluid connection with said one chamber and adapted to control flow of water through either of two outlets which have fluid connections respectively with said receptacle and the chamber beneath the same,

means for shifting the valve head of said valve means to open position to provide for flow of water from said other chamber of said diaphragm valve to thereby reduce pressure in said other chamber and cause said diaphragm to move to position interrupting flow of water to said other chamber, whereby water under pressure will flow to said second valve means and to either said receptacle or the chamber beneath the same, depending upon the "position of said second valve means, and means for forcibly removingwaste and water from the, chamber beneath said receptacle through said waste pipe. j

12. The construction according to claim wherein the valve controlling flow of waste through the opening between said receptacle and the chamber therebeneath is of the stopper type which is vertically shiftable and in an upper closed position blocking flow of waste through said opening and, in a lower open position permitting flow of waste,

a rotatable shaft having connection with the valve head of said second valve means for shifting the latter between two positions, I

a lever fixed to said shaft and manually operated by the user of said waste disposal device,

a cam fixed-to saidshaft and operable when said lever is moved to one position to open the valve head of said first valve means,

means for opening said stopper valve when water is flowingto said receptacle and for closing said stopper valve when water is flowing to the chamber beneath said receptacle, .water flowing into said chamber building a pressure therein,

means responsive toa predetermined pressure with said chamber to interrupt further water flow to said chamber and cause compressed air to flow to said chamber to force waste therein through said waste pipe.

connected evacuated therefrom.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2315824 *Nov 6, 1941Apr 6, 1943Arthur O SweenyCombined pneumatic and hydraulic water closet
US2449442 *Oct 4, 1947Sep 14, 1948Agra Arthur GTrailer toilet
US2501510 *Mar 27, 1946Mar 21, 1950Gross Jr Angus RoyMarine toilet
US2768386 *Jun 10, 1952Oct 30, 1956O & M Machine Company IncExcreta disposing toilet
US2886826 *Jan 30, 1958May 19, 1959John S ShaleenToilet
US3184761 *Nov 14, 1963May 25, 1965Arthur E BroughtonToilet system with pressure discharge pumping system
US3214772 *Oct 15, 1964Nov 2, 1965Mansfield Sanitary IncHopper for mechanical seal toilets
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3787901 *Jul 20, 1971Jan 29, 1974Gen Am TransportToilet and waste storage system
US3811135 *Dec 21, 1972May 21, 1974Mansfield Sanitary IncFlush control system
US3968526 *Aug 21, 1974Jul 13, 1976Microphor, Inc.Flush toilet and method
US4170048 *Jan 18, 1977Oct 9, 1979Alain AnthonyToilet installation
US4232409 *Aug 21, 1978Nov 11, 1980Minh Van PhamPneumatic assisted flushing apparatus for toilets
US4286342 *Mar 12, 1979Sep 1, 1981Alain AnthonyToilet installation
US4306321 *Nov 23, 1979Dec 22, 1981Norlin Lars OlofBoat and caravan closet
US5245710 *Dec 30, 1991Sep 21, 1993Microphor, Inc.Flush toilet and method
US5282281 *Jan 25, 1993Feb 1, 1994Burton Mechanical Contractors, Inc.Portable vacuum toilet system
US6401270 *Apr 13, 1999Jun 11, 2002Garry MooreToilet apparatus
US6804840Jun 14, 2002Oct 19, 2004Thetford CorporationPositive pressure waste transfer system
EP0410894A1 *Jul 26, 1990Jan 30, 1991Sanitaire Equipement Societe Anonyme Dite:W.C. with minimal flush water consumption and using compressed air as the power source
WO1993013276A1 *Nov 16, 1992Jul 8, 1993Microphor IncFlush toilet and method
WO1994017255A1 *Jan 25, 1994Aug 4, 1994Burton Mech ContractorsPortable vacuum toilet system
Classifications
U.S. Classification4/431, 4/435
International ClassificationE03D5/00
Cooperative ClassificationE03D5/00
European ClassificationE03D5/00