US3693649A - Water control for toilet tanks - Google Patents
Water control for toilet tanks Download PDFInfo
- Publication number
- US3693649A US3693649A US24247A US3693649DA US3693649A US 3693649 A US3693649 A US 3693649A US 24247 A US24247 A US 24247A US 3693649D A US3693649D A US 3693649DA US 3693649 A US3693649 A US 3693649A
- Authority
- US
- United States
- Prior art keywords
- water
- diaphragm
- tank
- valve
- float structure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/18—Actuating devices; Operating means; Releasing devices actuated by fluid actuated by a float
- F16K31/34—Actuating devices; Operating means; Releasing devices actuated by fluid actuated by a float acting on pilot valve controlling the cut-off apparatus
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/7287—Liquid level responsive or maintaining systems
- Y10T137/7358—By float controlled valve
- Y10T137/7368—Servo relay operation of control
- Y10T137/7371—Fluid pressure
- Y10T137/7374—Flexible diaphragm valve
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/7287—Liquid level responsive or maintaining systems
- Y10T137/7358—By float controlled valve
- Y10T137/7423—Rectilinearly traveling float
- Y10T137/7426—Float co-axial with valve or port
- Y10T137/7433—Float surrounds inlet pipe
Definitions
- ABSTRACT Covers a water control valve for a water tank which is associated with a conventional toilet bowl.
- the water control valve includes a valve structure mounted on a vertical water inlet pipe and a float structure which moves vertically along the inlet pipe to control the valve structure.
- the float structure includes two cupshaped elements, one positioned vertically above the other, both moving along the inlet pipe in response to any change in the water level within the water tank.
- the valve structure includes a flexible diaphragm which is normally positioned upon a seat at the upper opening of the inlet pipe and blocks the flow of water into the tank, and a pilot valve to control the movement of the flexible diaphragm.
- the pilot valve is mechanically coupled to the float structure so that, as the float structure descends toward the bottom of the tank, the pilot valve will be opened and, in turn, allow the diaphragm to be flexed upwardly to allow the entry of water into the tankv
- the pilot valve will be closed and the diaphragm will be returned to its normal position to block the flow of water into the flush tank.
- This invention relates to water control valves which are used in and in conjunction with a flush tank associated with a conventional toilet bowl for controlling the flow of water into the flush tank after the toilet bowl has been flushed.
- control mechanisms include a vertical water inlet pipe, which may be connected to the water supply system for receiving water whenever required to refill the tank, along with an inlet water valve and a conventional float coupled to the inlet valve by the usual long substantially horizontal rod.
- the float is usually ball-shaped and floats on the water surface within the tank.
- the float in its receded position near the bottom of the tank, will cause the inlet valve to be opened so that the tank may be refilled. After the water within the tank has reached its assigned upper level, the float mechanism will cause the inlet valve to become closed, thereby blocking any further inflow of water into the tank.
- the ball float type of structure above referred to has several significant limitations. It requires considerable space for the operation of the lever mechanism interconnecting and coupling the ball float to the inlet valve. It is also slow in operation and, moreover, it is noisy, ofttimes producing a hissing sound which can be disturbing to those in the vicinity.
- a new form of water control valve which includes a vertically arranged water inlet pipe or shank extension connected, for example, to the city water supply system, a main valve structure mounted fixedly at or near the top of the shank extension and a relatively small float structure which moves vertically and is closely spaced from but moves along the shank extension or sheath tube, if employed.
- the float structure includes two cup-shaped elements, one surmounted vertically above the other, the upper cup-shaped member being open at the top while the lower cup-shaped member is open at the bottom.
- the double-cupped float structure is mechanically coupled to the main valve mechanisms by means of a vertical rod which responds to and continually follows I the vertical movement of the float structure.
- a lever is employed to couple the vertical rod to a pilot valve element in the main valve structure and in turn it controls the pilot valve.
- the pilot valve includes a piston-like element which moves vertically to initiate the inflow of water through the shank extension and into the main valve, together with a single flexible diaphragm which is normally seated on the inlet seat located generally at the upper end of the shank extension and is controlled by the pilot valve.
- the lever-controlled pilot element When the water within the tank falls below its normal upper level immediately following a flushing operation, the lever-controlled pilot element will be raised and, in turn, actuate the diaphragm so as to elevate the diaphragm above the inlet seat. This will allow water to flow freely through the main valve and into the tank.
- FIG. 1 illustrates a side elevational view, partly in section, of the principal mechanism of this invention
- FIG. 2 shows a top plan view of the arrangement of FIG. 1;
- FIG. 3 shows a partial cross-sectional view taken along the lines 3-3 of FIG. 2, this figure showing the main valve mechanism in its closed position;
- FIG. 4 is a view similar to that of FIG. 3, in which the main valve mechanism is shown in its open position;
- FIG. 5 shows a cross-sectional view of the float structure per se
- FIGS. 6A and 6B show two views of the diaphragm retainer, which is one of the components of this invention, FIG. 6A showing a view from the underside of the retainer while FIG. 6B shows a side view of the retainer;
- FIG. 7A shows a cross-sectional view of a portion of the diaphragm of the main valve mechanism of this invention, and FIG. 7B shows a plan view of the same diaphragm;
- FIGS. 8A and 8B show two views of the diaphragm valve seat-body, FIG. 8A showing a cross-sectional view of the valve seat-body and FIG. 88 a plan view of the valve seat-body;
- FIG. 9 shows a cross-sectional view of a portion of the lower cap structure.
- FIG. 1 of the drawing there is shown part of a flush tank 2 which is normally mounted somewhat above the toilet bowl (not shown) with which the flush tank 2 is to be associated.
- the float structure 5 includes two cup-shaped chambers 4 and 6 which are separated by a horizontal wall or barrier 8.
- the float structure 5, therefore, is vertically movable as a unitary structure about the vertical sheath tube 10 which is vertically supported on a cylindrical shoulder 12 of a sheath tube shank 14.
- a shank extension 15 is mounted concentrically within the sheath tube 10 and its lower end is threadedly connected to an opening in the shank 16.
- the sheath tube shank 14 is mounted on a circular peripheral washer 20 which is mounted on the inner bottom wall of tank 2.
- the lower end of the shank 16 extends through the bottom opening of tank 2 as shown and is held in place by a nut 13 which may have conventional bleed holes 13'. The function of the bleed hole 13 will be subsequently explained.
- the sheath tube shank 14 is threadedly connected to a flanged portion of shank 16 as shown.
- the main valve mechanism 26 is fixedly mounted at or upon the upper end of shank extension 15.
- the main valve mechanism 26 includes two cap members, an upper cap 28 and a lower cap 30.
- a flexible diaphragm 32 is peripherally held between the two cap members 28 and 30 and the diaphragm is so held by screws 34. Because the diaphragm 32 is held peripherally by the two cap members 28 and 30, the central part of the diaphragm 32 is therefore free to move upwardly or downwardly against a valve seat structure 31, as will be explained.
- the diaphragm 32 has a central opening 35 positioned about a pin 40 which is vertically disposed therein, as shown.
- a diaphragm retainer 42 has a central aperture 44 for receiving and permanently holding the upper end of the pin 40.
- the retainer 42 is maintained in a stationery position and hence the pin 40 is vertically positioned within the aperture of diaphragm 32 and is immovable.
- the diaphragm 32 can be moved alternately and repeatedly up and down in a vertical position about the stationary pin 40 throughout the repeated operations of the main valve 26.
- the chambers 4 and 6 of the float structure are mechanically coupled to a vertical rod 50 so that, as the float structure moves upwardly or downwardly, the rod will likewise move upwardly or downwardly over the same vertical distance.
- the float rod 50 is shown mechanically coupled to a substantially horizontal lever 54 which is pivoted at 58 to a plunger element 60 which is retained and controlled by the lever 54.
- the plunger 60 is part of a pilot valve which is within the main valve 26 and is intended to move in a substantially vertical direction in response to the angular displacement of lever 54 about its pivot 58.
- a hush tube designated 64 is provided, as shown in FIGS. 1 to 4, to release water via the main valve 26 into the flush tank 2.
- a convention refill tube designated 80 is provided to feed some of the water into the toilet bowl near the end of each flushing operation, as is well known. This fluid is employed as a seal in the toilet bowl.
- the resulting elevated position of the float rod 50 will move the lever 54 about its pivot 58 in a counter clockwise direction, thereby moving the plunger 60 of the pilot valve downwardly to partially close the pilot hole 56.
- the diaphragm 32 will move downwardly to cover discharge ports 72 and also seats 33 and 33' and stop the flow of water through hush tube 64 and to refill tube 80.
- the weight of the float structure will be correspondingly reduced, thereby adding buoyancy to the float structure 5.
- the float rod 50 will be moved upward sufficiently so as to firmly close the plunger 60 against its seat and thereby completely shut off the water flow through the pilot hole 56.
- the diaphragm 32 will close the cylindrically arranged discharge ports 72 before the central section of the diaphragm 32 is brought to rest on the pitched circular seats 33 and 33' at the upper side of the valve seat body 31 and at the upwardly extending center portion of lower cap 30.
- the general contour of circular seat 33 of the valve seat body 31 is seen in FIG. 8A.
- the general contour of circular seat 33' is seen in FIG. 9.
- the flexible diaphragm 32 will be deflected to the greatest extent at its central region adjacent to the pin 40. The diaphragm 32 will come to rest against the valve seats 33 and 33 and shut off the water supply.
- the closure of the peripherally arranged discharge ports 72 before diaphragm 32 is brought to rest against the valve seats 33 and 33' may cause oscillatory driving forces to act upon the diaphragm 32 to render it into vibratory motion thereby producing what is generally known as water hammer.
- the radial passages 120 are especially provided in the valve seat body 31. These passages, which will preferably correspond in size and number to the discharge ports 72, effect a smoother closure of the diaphragm 32 against the main valve inlet seats 33 and 33'. It is a feature of this invention to secure the properly timed and smooth closure of the inlet seats 33 and 33' after the discharge ports 72 have been closed by diaphragm 32.
- the plunger 60 of the pilot valve has a groove 90 so that it may receive and retain the fingers of the lever 54.
- a limited amount of lateral movement is provided by the spaces between the plunger 60 and the lever 54.
- the lever 54 may be rotated about its axis 58 in response to the vertical movement of float 5 as the water level rises and falls within the tank 2. This will cause the plunger 60 to be pushed down or pulled up substantially along a vertical path.
- the construction of the plunger 60 and lever 54 is arranged to enable the plunger 60 to be moved substantially vertically in response to the angular motion of lever 54 about its pivot 58. This facilitates a more precise opening and closing of the vertical pilot hole 56 by the plunger 60 of the pilot valve structure with a minimum of leakage.
- the plunger 60 has a segment 92, preferably a flexible or rubber segment, affixed to its lower end so that the flexible or rubber segment will be firmly seated against the elevated seat 130 at the upper end of pilot hole 56 when the valve 26 is to be closed and leakage prevented.
- the rubber attachment 92 should be shaped so as to seal the upper cap 28 and thereby prevent any fluid within the main valve chambers from being released through the spaces provided around plunger 60. Thus, any spray or unintended discharge of water from the valve mechanism 26 is eliminated.
- the upper cap 28 provides the main passageway through which water flowing through the pilot hole 56 may be discharged into the upper chamber 4 of the float structure 5. Water flowing upwardly through the pilot hole 56 and through the passage 68 formed in the upper cap 28 will be received in the upper chamber 4 of the float structure 5 only during the time when the flush tank 2 is to be refilled.
- the diaphragm retainer 42 is positioned within the upper cap 28 which is so shaped internally as to provide a large contact area with the upper surface of the diaphragm retainer 42 to establish a good physical support for the diaphragm 32 in its upper position. In the absence of adequate support, the diaphragm retainer 42 might be flexed beyond its limit and possibly cracked due to the stresses applied.
- the diaphragm retainer 42 fixedly supports the central pin 40 in a continuously stationary position and remains inserted within the aperture 35 of the diaphragm 32 as it is flexed upwardly.
- Radial grooves 140 formed in the underside of diaphragm retainer 42 prevent the cohesion of the diaphragm 32 to the underside of the diaphragm retainer when the main valve is in its open position. Such cohesion would cause the malfunction of the main valve structure.
- the adherence of the diaphragm 32 to retainer 42 can cause an oversupply of water to the flush tank 2 and possibly also a flooding of the bathroom.
- Another function of radial grooves 140 is to provide adequate distribution of water above diaphragm 32 to assure sufficient driving force on the upper surface of the diaphragm when pilot hole 56 is closed.
- the upper surface of the diaphragm retainer 42 is provided with a pitched seat for receiving the resilient attachment 92 of the plunger 60, the edges of the seat being fairly sharp.
- the downward movement of the plunger 60 is physically limited by the projecting region of seat 110.
- the relatively sharp-edged configuration of pilot seat 1 10 allows for the smallest practical pilot hole area possible to assure the minimal pressure required to positively close off the pilot hole area.
- the pin 40 may be any linear pin which can be conveniently press-fitted into the diaphragm retainer 42 and yet it should be of a size to be enterable into the aperture of the diaphragm 32 and interpose little or no friction as it moves up or down.
- the pin 40 may preferably be a grooved stainless steel pin, for example, a pin which is commercially known as Driv-Lok.
- slots or grooves on pin 40 are not indispensible to the practice of the invention, they are preferable especially because they aid in establishing positive cleaning or wiping action to remove particles of dirt or other material from being deposited on the central opening 35 of the diaphragm 32 as it is flexed during each operation of the main valve.
- the grooves provide a scraping action and also maintain constant the size of the central aperture of the diaphragm 32 for the free movement of water upwardly through the spaces between the outer regions of the pin and the walls of the aperture into the upper chamber 62 of the valve.
- the plunger 60 to which the flexible or elastic attachment 92 is affixed is so arranged that, at the moment when the main valve is to be closed, there will be relatively light closing pressure applied by plunger 60 against the seat 110.
- the diaphragm 32 will begin moving in a downward direction to close discharge ports 72 and the main valve seats 33 and 33'.
- the pilot hole 56 is the first passage to be opened when the flush tank 2 is to be refilled and it islikewise the first passage to be closed when the refilling operation is to cease.
- the diaphragm 32 is raised as the pilot hole is opened to allow water to enter the tank 2 rapidly and it is likewise closed as the pilot hole 56 is closed to stop the water flow.
- FIGS. 3 and 4 show the flexible backflow washer 98.
- the backflow washer 98 assumes a generally horizontal relaxed position just below the bottom surface of the valve seat body 31.
- the main valve mechanism is in the on or open position, as shown in FIG. 4, the water being discharged through discharge ports 72 forces the backflow washer 98 downward against the sloping surface of lower cap 30 to allow the water to pass on to the hush tube 64 and to the refill tube 80.
- Air holes or openings 130 are provided in the sloping surface of the lower cap 30 as shown in FIGS. 3 and 4.
- the backflow washer 98 is forced downward as previously described.
- the air holes 130 may be sealed off by the backflow washer 98 whenever required, thereby preventing the discharge of water through the openings 130.
- All of the ports of the valve mechanism 26 of this invention although shown as relatively small, have been made sufficiently large so as to enable free and easy passage of the kinds of foreign matter normally expected to be found in the usual water supply.
- the central aperture 35 of the diaphragm 32 is maintained, by means of pin 40, in a relatively clean condition at all times so as to avoid or remove any scale deposits in or near the diaphragm opening 35.
- Such scale deposits on pin 40 or on the walls of aperture 35 would reduce the efficiency of the valve mechanism 26 and ultimately clog the central opening 35. This would reduce the eff ciency of the main valve 26 and perhaps render it inoperative.
- the continuously maintained cleanliness of the central aperture 35 is an important feature in the operativeness and the minimal maintenance requirements of this structure.
- a hush tube 64 is shown as a conventional pipe or conduit for simplicity of explanation and illustration, it may be any form of chamber, whether a swirl chamber or not, for supplying water to a water'tank or reserve cistern or a toilet bowl.
- the hush tube 64 may, if desired, be filled with a foam material so as to improve the quietness of the water flow therethrough into main tank 2.
- the mechanism of this invention will operate at a relatively low noise factor.
- the float mechanism 5 will cause the pilot plunger 60 to open the pilot hole 56 which in turn relieves the pressure above diaphragm 32 so that water may enter the tank 2.
- Water can enter the tank 2 in volume only after the diaphragm 32 has been raised above the main valve seat 33 and 33. When this occurs, the upwardly flowing water will be directed over the valve seat 31 into the discharge ports 72 leading to the hush tube 64 and to the refill tube 80. Some water will also travel upward through the central aperture 35 of the diaphragm 32 into the chamber 62 below the retainer 42 through the pilot hole 56.
- Both the float structure 5 and the plunger 60 are assigned to, and travel over, substantially parallel paths.
- the mechanism which interconnects these two structures is arranged to maintain substantially linear vertical travel at all times.
- the water within the shank extension 15 will then flow into the very narrow space between the shank extension 15 and the sheath tube 10.
- the water will then be drained through the space between the shank l6 and the sheath tube shank 14.
- the water will then travel through the opening in the bottom of the tank 2 at the periphery of the shank l6 and be discharged through the bleed holes 13' of the nut 13. The water will leak to the floor.
- Backflow prevention is shown and described herein because it is required in many localities. However, this feature may be omitted, if desired.
- Water control mechanism for a tank comprising a substantially vertical water inlet pipe mounted within said tank, a substantially vertical movable float structure comprising a buoyant main body portion and an open ended top portion, the latter portion having a bleed hole therein, said float structure being mounted concentrically about said inlet pipe and being vertically movable to be substantially level with the water within said tank, a pilot valve having a piston which is substantially vertically movable and is coupled by a lever which is extended downwardly to the float structure, said mechanism also having a flexible diaphragm and a stationary retainer for peripherally holding said diaphragm, said diaphragm being relatively thin and substantially uniform in thickness and positioned on one side of said piston and fluidically coupled to the piston through a cavity in said retainer located on one side of the diaphragm and freely responsive to the movement of the piston to control the flow of water through said cavity, the diaphragm responding to the movement of the piston in one direction to reduce the water pressure on one side of said diaphragm
- the cleaning means comprises a stationary pin made of steel and exteriorly grooved and continually positioned immovably within the movable diaphragm aperture for removing foreign material as the diaphragm is deflected along the external surface of said pin.
- the float structure comprises two cylindrical cup-shaped members which are vertically arranged and vertically movable as a unit so that the upper cup member is open at the top and the lower cup member is open at the bottom and the upper cup member receives water discharged through the valve and has the bleed hole adjacent the bottom thereof to relay the received water to the tank.
- Water control mechanism for a tank comprising a substantially vertical pipe positioned within the tank so that water may be supplied under pressure to the tank, a valve mechanism normally seated on the upper end of the vertical pipe and above the water level within the tank and having a thin, freely flexible diaphragm having an aperture, said diaphragm being of substantially uniform thickness so as to be flexible for the rapid control of the flow of water through the vertical pipe, a stationary retainer for peripherally holding said diaphragm while permitting the center of said diaphragm to be deflected, said valve mechanism incorporating a pilot valve positioned on one side of said diaphragm above the water level within the tank, said retainer having an opening therein for fluidically coupling the pilot valve to said diaphragm for controlling the movement of the diaphragm, a float structure having an open top cup with a bleed hole and an inverted bottom cup, both cups being concentrically arranged about the vertical pipe but below said valve mechanism and movable in response to changes in the level of the water
- Water control mechanism in which the vertically arranged continuously stationary pin positioned within the aperture of the diaphragm is grooved, so that as the diaphragm moves in either direction, foreign matter deposited or to be deposited within said aperture will be displaced from said aperture.
- pilot valve includes a substantially vertically moving plunger which is coupled by a lever extending downwardly to the float structure.
- pilot valve has a piston positioned adjacent the opening in the retainer and movable to control the pressure applied to the diaphragm to thereby control its deflection.
- a water control valve for a tank including within said tank a substantially vertically arranged water inlet supply pipe, a valve normally seated adjacent the upper end of said inlet pipe and continuously positioned above the water level within said tank, an open-top float structure concentrically arranged about the inlet pipe for receiving some of the water discharged from said valve and for responding to the level of the water within the tank, said valve having a stationary retainer for a peripherally retained thin, easily flexible diaphragm of substantially uniform thickness and having a concentric aperture and including means to seal the upper end of the inlet pipe, a pilot piston mechanism to control the operation of the diaphragm, said retainer having an opening therein aligned with the pilot mechanism to control pressure on the diaphragm, means responsive to the downward movement of the float structure to operate the pilot mechanism and in turn relieve the pressure on the diaphragm so as to elevate thediaphragm and allow water to flow through the inlet pipe and through the valve into the open-top float structure and into the flush tank, and
- a water control valve in which the float structure includes two cup-shaped members which are substantially vertically arranged, the upper cup-shaped member being open at the top for receiving water discharged from the valve and having a bleed hole for discharging the received water, the lower cup-shaped member being open at the bottom and substantially responsive to the level of the water within the flush tank to raise the float structure and cause the operation of the valve.
- Fluid control mechanism for a tank comprising a substantially vertically moving float mechanism composed of two cup-like members one of which is open at the top with a bleed hole therein adjacent its bottom and the other is open at the bottom, a valve mechanism having an apertured retainer supporting a stationary vertical externally grooved pin and a substantially vertically moving piston-like element and a substantially uniformly thin flexible diaphragm peripherally held by said retainer and spaced from the fluidically coupled to said element by and through said aperture in said retainer which separates said element from said diaphragm, means for mechanically coupling said float mechanism to said element of said valve mechanism so that said float mechanism and said element move only in opposite directions, said diaphragm having a central opening within which said pin is spacedly positioned and remains stationary as the diaphragm moves in either direction about said pin, said aperture in said retainer and said opening in said diaphragm being spaced from each other by a substantially unobstructed path, and means responsive to the lowering of the float
Abstract
Description
Claims (13)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US2424770A | 1970-03-31 | 1970-03-31 |
Publications (1)
Publication Number | Publication Date |
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US3693649A true US3693649A (en) | 1972-09-26 |
Family
ID=21819609
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US24247A Expired - Lifetime US3693649A (en) | 1970-03-31 | 1970-03-31 | Water control for toilet tanks |
Country Status (2)
Country | Link |
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US (1) | US3693649A (en) |
CA (1) | CA937840A (en) |
Cited By (56)
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US3797518A (en) * | 1972-08-09 | 1974-03-19 | Kirkhill Inc | Adjustable height ballcock assembly |
US3853141A (en) * | 1973-07-09 | 1974-12-10 | E Fischer | Toilet reservoir valve |
US3895645A (en) * | 1973-03-09 | 1975-07-22 | Jh Ind Inc | Fluid level control valve |
US3994313A (en) * | 1975-02-20 | 1976-11-30 | Brandelli Anthony R | Toilet bowl valve |
USD244693S (en) * | 1976-07-19 | 1977-06-14 | Adolf Schoepe | Ball cock float |
USD245172S (en) * | 1976-07-19 | 1977-07-26 | Adolf Schoepe | Vertically adjustable ball cock |
US4065095A (en) * | 1975-02-18 | 1977-12-27 | Johnson Dwight N | Fluid level control valve |
JPS5312526A (en) * | 1976-07-19 | 1978-02-04 | Schoepe Adolf | Ball cock structure for controlling level of liquid in tank |
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US4095614A (en) * | 1976-11-05 | 1978-06-20 | The United States Of America As Represented By The Secretary Of The Air Force | Liquid level control system |
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US20040210996A1 (en) * | 2003-04-24 | 2004-10-28 | Sager Merrell C. | Emergency flush control system for toilets |
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US7028704B2 (en) * | 1998-10-20 | 2006-04-18 | Morgantown Plastics Company | Fill valve |
US7156363B2 (en) | 2001-12-26 | 2007-01-02 | Arichell Technologies, Inc. | Bathroom flushers with novel sensors and controllers |
US7188822B2 (en) | 2003-02-20 | 2007-03-13 | Arichell Technologies, Inc. | Enclosures for automatic bathroom flushers |
US7383721B2 (en) | 2002-06-24 | 2008-06-10 | Arichell Technologies Inc. | Leak Detector |
US7396000B2 (en) | 2001-12-04 | 2008-07-08 | Arichell Technologies Inc | Passive sensors for automatic faucets and bathroom flushers |
US7437778B2 (en) | 2001-12-04 | 2008-10-21 | Arichell Technologies Inc. | Automatic bathroom flushers |
USD612014S1 (en) | 2003-02-20 | 2010-03-16 | Sloan Valve Company | Automatic bathroom flusher cover |
US7731154B2 (en) | 2002-12-04 | 2010-06-08 | Parsons Natan E | Passive sensors for automatic faucets and bathroom flushers |
USD620554S1 (en) | 2004-02-20 | 2010-07-27 | Sloan Valve Company | Enclosure for automatic bathroom flusher |
USD621909S1 (en) | 2004-02-20 | 2010-08-17 | Sloan Valve Company | Enclosure for automatic bathroom flusher |
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US20120012193A1 (en) * | 2009-03-31 | 2012-01-19 | Watos Corea Co., Ltd. | Apparatus for preventing backflow of fill valve in water toilet |
US20130074953A1 (en) * | 2011-09-23 | 2013-03-28 | So-Mei Huang | Water inlet device for a water tank |
AU2012203015B2 (en) * | 2011-12-01 | 2015-03-26 | Hansen Developments Limited | Leveller Valve |
US20150122343A1 (en) * | 2013-11-01 | 2015-05-07 | Dominic P. Ismert | Fill valves for toilets |
US20150184763A1 (en) * | 2012-03-02 | 2015-07-02 | Apex Valves Limited | Liquid Control Valve |
US9169626B2 (en) | 2003-02-20 | 2015-10-27 | Fatih Guler | Automatic bathroom flushers |
US9605991B2 (en) | 2014-04-01 | 2017-03-28 | Xerox Corporation | Floating mechanical level sensor |
US9809963B2 (en) * | 2016-03-11 | 2017-11-07 | So-Mei Huang | Leak-proof water valve of toilet tank |
EP3263781A1 (en) * | 2016-07-01 | 2018-01-03 | Geberit International AG | Inlet fitting |
WO2020163105A1 (en) * | 2019-02-06 | 2020-08-13 | Hanuman Pelican, Inc. | Apparatus and methods for concentrating platelet-rich plasma |
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US3797518A (en) * | 1972-08-09 | 1974-03-19 | Kirkhill Inc | Adjustable height ballcock assembly |
US3895645A (en) * | 1973-03-09 | 1975-07-22 | Jh Ind Inc | Fluid level control valve |
US3853141A (en) * | 1973-07-09 | 1974-12-10 | E Fischer | Toilet reservoir valve |
US4065095A (en) * | 1975-02-18 | 1977-12-27 | Johnson Dwight N | Fluid level control valve |
US3994313A (en) * | 1975-02-20 | 1976-11-30 | Brandelli Anthony R | Toilet bowl valve |
US4100928A (en) * | 1976-07-19 | 1978-07-18 | Adolf Schoepe | Ball cock construction for controlling the level of liquids such as water in tanks |
JPS5653153B2 (en) * | 1976-07-19 | 1981-12-17 | ||
JPS5312526A (en) * | 1976-07-19 | 1978-02-04 | Schoepe Adolf | Ball cock structure for controlling level of liquid in tank |
USD244693S (en) * | 1976-07-19 | 1977-06-14 | Adolf Schoepe | Ball cock float |
USD245172S (en) * | 1976-07-19 | 1977-07-26 | Adolf Schoepe | Vertically adjustable ball cock |
US4095614A (en) * | 1976-11-05 | 1978-06-20 | The United States Of America As Represented By The Secretary Of The Air Force | Liquid level control system |
US4094327A (en) * | 1977-02-07 | 1978-06-13 | Brandelli Anthony R | Fluid control device |
US4136711A (en) * | 1977-05-23 | 1979-01-30 | Masco Corporation | Pilot operated ball cock valve |
US4341238A (en) * | 1977-05-27 | 1982-07-27 | Roosa Vernon D | Flushing means |
US4180096A (en) * | 1977-06-23 | 1979-12-25 | J. H. Industries, Inc. | Fill valve |
US4286619A (en) * | 1979-05-07 | 1981-09-01 | Hoover Universal, Inc. | Ballcock assembly |
US4258746A (en) * | 1979-05-29 | 1981-03-31 | Hudson George D | Float valve with variable liquid ballast |
US4431024A (en) * | 1981-10-19 | 1984-02-14 | Trenton Pipe Nipple Company | Float-controlled valve for toilet flush tanks |
US4794946A (en) * | 1988-02-09 | 1989-01-03 | Antunez Bruce A | Inherently adjustable inverted cup float for a ballcock valve |
US5090659A (en) * | 1989-01-19 | 1992-02-25 | Bronnert Herve X | Pressure responsive diaphragm control valve |
US4993086A (en) * | 1989-08-07 | 1991-02-19 | Palmer Willice C | Emergency shut-off mechanism for flush tank |
US5067516A (en) * | 1990-09-17 | 1991-11-26 | Gale Keith F | Valve assembly |
US5175894A (en) * | 1990-11-13 | 1993-01-05 | Aucera Technology Corp. | Toilet flushing device |
US5456279A (en) * | 1993-12-15 | 1995-10-10 | Recurrent Solutions Limited Partnership | Diaphragm-type pilot valve having a self-cleaning control orifice |
US5586466A (en) * | 1993-12-16 | 1996-12-24 | Steiner; George A. | Non-slip sleeve for float level sensor shaft |
US5365969A (en) * | 1994-01-21 | 1994-11-22 | White Consolidated Industries, Inc. | Float with skirt to prevent leakage due to oversudsing |
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US6332475B1 (en) * | 1997-02-21 | 2001-12-25 | Mastavalve Pty. Ltd. | Filling stop valve |
US6123099A (en) * | 1997-06-19 | 2000-09-26 | George S. Cole & Associates, Incorporated | Pinch tube tank level control valve with snap-action shutoff |
US5896887A (en) * | 1997-06-19 | 1999-04-27 | George S. Cole & Associates, Incorporated | Pinch tube tank level control valve with snap-action shutoff |
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US7028704B2 (en) * | 1998-10-20 | 2006-04-18 | Morgantown Plastics Company | Fill valve |
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US6510866B2 (en) * | 2001-03-26 | 2003-01-28 | Wdi International, Inc. | Ball cock assembly, float assembly for same, and method of controlling liquid level in a tank |
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US7396000B2 (en) | 2001-12-04 | 2008-07-08 | Arichell Technologies Inc | Passive sensors for automatic faucets and bathroom flushers |
US7437778B2 (en) | 2001-12-04 | 2008-10-21 | Arichell Technologies Inc. | Automatic bathroom flushers |
US7156363B2 (en) | 2001-12-26 | 2007-01-02 | Arichell Technologies, Inc. | Bathroom flushers with novel sensors and controllers |
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US8276878B2 (en) | 2002-12-04 | 2012-10-02 | Parsons Natan E | Passive sensors for automatic faucets |
US7731154B2 (en) | 2002-12-04 | 2010-06-08 | Parsons Natan E | Passive sensors for automatic faucets and bathroom flushers |
US7188822B2 (en) | 2003-02-20 | 2007-03-13 | Arichell Technologies, Inc. | Enclosures for automatic bathroom flushers |
US8556228B2 (en) | 2003-02-20 | 2013-10-15 | Sloan Valve Company | Enclosures for automatic bathroom flushers |
US9598847B2 (en) | 2003-02-20 | 2017-03-21 | Sloan Valve Company | Enclosures for automatic bathroom flushers |
US9169626B2 (en) | 2003-02-20 | 2015-10-27 | Fatih Guler | Automatic bathroom flushers |
US20110017930A1 (en) * | 2003-02-20 | 2011-01-27 | Marcichow Martin E | Novel enclosures for automatic bathroom flushers |
USD612014S1 (en) | 2003-02-20 | 2010-03-16 | Sloan Valve Company | Automatic bathroom flusher cover |
US7325781B2 (en) | 2003-02-20 | 2008-02-05 | Arichell Technologies Inc. | Automatic bathroom flushers with modular design |
US20040210996A1 (en) * | 2003-04-24 | 2004-10-28 | Sager Merrell C. | Emergency flush control system for toilets |
US20050121079A1 (en) * | 2003-12-05 | 2005-06-09 | So-Mel Huang | Water filler for water tank |
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Legal Events
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Owner name: BANKERS TRUST COMPANY, NEW YORK Free format text: SECURITY INTEREST;ASSIGNOR:U.S. PLUMBING, INC., A CORPORATION OF DELAWARE;REEL/FRAME:004905/0159 Effective date: 19880624 Owner name: BANKERS TRUST COMPANY, 4 ALBANY STREET 9TH FLOOR, Free format text: SECURITY INTEREST;ASSIGNOR:U.S. PLUMBING, INC., A CORPORATION OF DELAWARE;REEL/FRAME:004905/0159 Effective date: 19880624 Owner name: BANKERS TRUST COMPANY Free format text: SECURITY INTEREST;ASSIGNOR:AMERICAN STANDARD INC., A DE. CORP.,;REEL/FRAME:004905/0035 Effective date: 19880624 |
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