Classifications

• • E—FIXED CONSTRUCTIONS
  • E03—WATER SUPPLY; SEWERAGE
  • E03D—WATER-CLOSETS OR URINALS WITH FLUSHING DEVICES; FLUSHING VALVES THEREFOR
  • E03D3/00—Flushing devices operated by pressure of the water supply system flushing valves not connected to the water-supply main, also if air is blown in the water seal for a quick flushing
  • E03D3/10—Flushing devices with pressure-operated reservoir, e.g. air chamber
• • E—FIXED CONSTRUCTIONS
  • E03—WATER SUPPLY; SEWERAGE
  • E03D—WATER-CLOSETS OR URINALS WITH FLUSHING DEVICES; FLUSHING VALVES THEREFOR
  • E03D1/00—Water flushing devices with cisterns ; Setting up a range of flushing devices or water-closets; Combinations of several flushing devices
  • E03D1/01—Shape or selection of material for flushing cisterns
  • E03D1/012—Details of shape of cisterns, e.g. for connecting to wall, for supporting or connecting flushing-device actuators

Definitions

• the present invention relates generally to the field of pressure assist water closet systems, and more particularly, to a pressure assist flush system for use with in-wall plumbing that is easy to service.
• a pressure assist water closet system stores water under pressure to provide thrust to discharge the contents of a bowl during a flush cycle.
• the pressure is supplied by the pressure in the water supply line itself and no additional power is required.
• the water enters the storage vessel and trapped air is compressed. Since a liquid is non-compressible and air is compressible, the air will be compressed until the air pressure in the vessel is equal to the water supply line pressure.
• the pressure in the tank can be set not to exceed a certain value with a pressure regulator.
• a pressure assist flush system provides a number of advantages over a traditional gravity flush system.
• the discharge pressure of the water is greater than that achieved in gravity assist units.
• the increased pressure allows for greater evacuation with less water by thrusting the waste out of the bowl.
• the pressurized water enables the use of discharge line with a greater diameter and greater surface area of standing water within the bowl.
• Various pressure assist flush systems and improvements are described in U.S.
• 5,361 ,426 entitled “Hydraulically Controlled Pressurized Water Closet Flushing System” to Martin
• 5,970,527 entitled “Pressurized Water Closet Flushing System” to Martin et al.
• 6,343,387 entitled “Volume Control For A Water Closet” to Beh.
• One embodiment of the invention relates to pressurized water closet flushing system comprising a water vessel having at least one opening and a cap covering the opening.
• a fill tube extends into and is secured to the vessel.
• the fill tube remains secured to the vessel when the cap is removed.
• Another embodiment of a pressurized water closet comprises a water vessel having at least one opening and a cap removeably secured to the opening . At least one o-ring seals the cap assembly to the water vessel.
• the water closet further includes means for releasably securing the cap assembly to the vessel.
• Still another embodiment of a pressurized water closet flushing system comprises a vessel operatively connected to a water supply line through a first opening and operatively connected to a toilet through a second opening .
• a cap assembly sealing the first opening and secured to the vessel with a fastener.
• a pressure relief valve is operatively connected to the interior of the vessel and is closed when the fastener is in a fully engaged position. The pressure relief valve is released prior to the seal being broken as the fastener is moved a predetermined distance from the fully engaged position.
• Another embodiment of the pressurized water closet flushing system * comprises a vessel having a first upper opening and a second lower opening operatively connected to a toilet.
• a cap assembly operatively connects a water supply to the first opening and includes an actuator.
• the cap assembly is formed from at least two separate modules. Each module has a separate housing and the housings are releasably secured to each other without tools.
• a further embodiment of a pressurized water closet for flushing a toilet comprises a vessel including an interior having an upper surface with a first opening operatively connected to a water supply line and a lower surface having a second opening operatively connected to the toilet.
• a non- pressurized mount is operatively connected to the lower surface.
• An extension extends from the mount and is secured directly to the toilet.
• a pressurized water closet flushing system is located within a wall and includes a pressurized water vessel having at least one opening.
• a cap assembly is removeably secured to the opening of the vessel.
• a release mechanism permits the removal of the cap assembly from the vessel without separate tools.
• Another embodiment includes a method of repairing an in-wall pressurized water flush system having a pressurized water vessel and a cap assembly including an actuator where the vessel and cap assembly are located in a wall cavity. Pressure is released from within the pressurized vessel, a user then removes the cap assembly by reaching through an access opening in the wall and lifts the cap assembly off of the vessel. The cap assembly is then removed from the wall cavity through the access opening in the wall that is too small to remove the vessel.
• a pressurized water flushing system in still another embodiment, includes a pressurized water vessel having a first opening and a second opening.
• a cap assembly is secured to a water intake line and to the opening in the water vessel.
• An electronic actuator is operatively connected to the cap assembly to permit water to exit the water vessel.
• an in-wall pressurized water flushing system is located within a wall cavity and coupled to a water intake line.
• a pressurized water vessel has at least one opening and an actuator assembly is coupled to the vessel.
• a flexible hose connects the water intake and actuator.
• the cap assembly is removable from the pressurized vessel though an access panel in the wall while still attached to the flexible hose and the flexible hose has a length sufficient to remove the actuator though the access panel.
• an in-wall pressurized water flushing system is located within a wall cavity and coupled to a water intake line and operatively connected to a toilet.
• a pressurized water vessel storing water under pressure is located within a wall cavity.
• a waterproof jacket surrounds at least a portion of the pressurized water vessel. The jacket and vessel form a channel therebetween that is in fluid communication with the toilet.
• FIG. 1 is a schematic front view of a water closet system with a front portion broken away.
• FIG. 2A is a top view of the water closet system with a pull pin fully seated.
• FIG. 2B is a top view of the water closet system with a pull pin partially withdrawn.
• FIG. 2C is a partial cross-sectional view taken along a portion of line
• FIG. 2D is a partial cross-sectional view taken along a portion of line
• FIG. 3 is a partial cross-sectional view of the water closet of FIG. 1 .
• FIG. 4 is an exploded view of the water closet system.
• FIG. 5 is a partial exploded top view of the cap assembly.
• FIG . 6 Is a cross-sectional view taken along lines 6-6 of FIG. 3.
• FIG . 7 is a cross-sectional view taken generally along lines 7-7 of
• FIG. 8 is a cross-sectional view taken generally along lines 8-8 of
• FIG. 9 is a partial top view of the vessel.
• FIG. 1 0 is the view of FIG. 1 with a jacket surrounding the vessel.
• pressure assist system 1 0 includes a vessel 1 2 and a cap assembly 1 4 secured to the top of vessel 1 2.
• vessel 1 2 Housed in vessel 1 2 is a flush valve assembly 1 6, a fill tube 1 8 and a discharge tube 20.
• Cap assembly 14 is secured to vessel 1 2 with a plurality of o-rings and a retaining pin 22. The o-rings and retaining pin 22 permit easy assembly and removal of cap assembly 14.
• Cap assembly includes a vacuum breaker 24, a pressure regulator 26, an aerator 28 and an actuator 30.
• Vessel 1 2 is formed from a top section 32 and a bottom section 34. Top and bottom sections 32, 34 are vibration welded to one another to form vessel 1 2. As shown in FIG.
• top section 32 includes a top region 36 including a flush valve assembly opening 38, a fill tube opening 40 and a discharge tube opening 42. Extending downward from valve assembly opening 38 is a circular wall 44 having a free end 46 distal valve assembly opening 38. A flush valve cavity 48 is defined as the region between the valve assembly opening 38 and the free end 46 of the circular wall 44.
• Each of fill tube opening 40 and discharge opening 42 include a downwardly extending annular wall 47, 49 having a lower inwardly extending annular ledge 50, 52 respectively.
• a well 54, 56 is defined by annular walls 47, 49 and annular ledge 50, 52 respectively.
• Each annular ledge 50, 52 includes a key way opening 55, 57.
• Top region 36 of top section 32 includes an inwardly extending regulator recess 58 configured to receive a portion of vacuum breaker 24.
• Top section 32 also includes two semi-hemispherical tower portions 60, 62 extending upward from top region 36 to form two air compression chambers.
• Top section 32 includes two downwardly extending walls, 64, 66 that effectively forms two separate regions or chambers 68, 70 below each tower portion 60, 62 respectively. Additionally, a third region 61 exits between walls 66 and 64.
• each ear includes an opening 74 configured to receive a portion of pull-pin 22.
• an extension 76 extends outward from the lower surface 78 bottom section 34. Extension 76 is configured to provide the connection between the vessel and the bowl or to a pipe leading to the bowl. Also extending from bottom section 34 within extension 76 is a valve seal surface 80. Valve seal surface 80 includes a beveled region 82 configured to sealing mate with a lower seal surface 84 of flush valve assembly 1 6.
• flush valve assembly 1 6 includes a hollow lower stem portion 100, a pressure release valve 102, and an upper stem portion 1 04 with an uppermost end 106.
• Pressure release valve 1 02 includes a seal 1 08 biased by a spring 1 1 0 to seal the opening 1 1 2 between the upper stem portion 1 04 and lower stem portion 1 00.
• An outer seal 1 14 is located about the periphery of the pressure relief valve 1 02 to create a seal between the flush valve cavity 48 and the rest of the area of vessel 1 2.
• the outer seal 1 1 4 includes a downwardly extending flange 1 1 6.
• flange 1 1 6 could include both a downwardly extending portion and an upwardly extending portion.
• Flange 1 1 6 helps to ensure the seal operates effectively.
• Upper stem portion 1 04 has a geometry such as an x-shape to permit fluid to enter the pressure release valve 1 02 from the flush valve cavity 48. Of course other geometry allowing fluid to enter the pressure release valve may also be used.
• fill tube 1 8 includes a hollow tube 1 1 8 having an upper end 1 20 and a lower end 88. Hollow tube 1 1 8 includes an aperture 1 21 to permit water to enter the interior of the vessel 1 2.
• Aperture 1 21 is located in bottom section 34 when fill tube 1 8 is secured within vessel 1 2.
• Hollow tube 1 1 8 includes an outwardly extending flange 1 22 proximate upper end 1 20.
• the outer diameter of the hollow tube 1 1 8 is less than or equal to the diameter of an opening 1 24 defined by the annular ledge 50 in fill tube well 54.
• the diameter of outwardly extending flange 1 22 is greater than the diameter of opening 1 24.
• An external o-ring 1 26 is located within a recess in the upper flange 1 22. O-ring 1 26 provides a lateral seal between the fill tube and the fill tube opening 40.
• a second o-ring 1 29 is located in the interior of hollow tube 1 1 8 to receive a portion of cap assembly 14 as described below.
• the fill tube 1 8 includes a key 1 28 extending outward from the hollow tube portion 1 1 8.
• discharge tube 20 includes a hollow tube portion 1 30 and an upper outwardly extending flange portion 1 32.
• a key 1 34 extends outwardly from hollow tube portion 1 30 proximate flange 1 32.
• Discharge tube 20 provides a path through which water can be discharged from the flush valve cavity 48 to discharge region 94 and through extension member 76 into the bowl as will be described below.
• a pair of spaced apart o-rings 1 36 is located within external recesses on flange 1 32. The lower o-ring 1 36 provides the seal between discharge tube 20 and vessel 1 2, while the upper o-ring 1 36 provides the seal between discharge tube 20 and a portion of cap assembly 1 4.
• a third o-ring 1 38 is located in an external recess located proximate lower end 92 to provide a seal between discharge tube 20 and vessel 1 2.
• cap assembly 1 4 includes vacuum breaker 24, regulator 26, aerator 28, and actuator 30.
• vacuum breaker 24, regulator 26, aerator 28 and actuator 30 are arranged to fit between towers 60, 62 and substantially between a front wall 1 40 and rear wall 1 42 of vessel 1 2.
• vacuum breaker 24, regulator 26, aerator 28 and actuator 30 are arranged in a non-linear fashion, with both an inlet 144, and actuator button 1 46 being located proximate front wall 1 40.
• cap assembly 14 is formed from three detachable modules.
• the first module 148 includes the vacuum breaker 24 and part of pressure regulator 26.
• Vacuum breaker 24 works in conjunction with inlet 1 44 to prohibit the back flow of water from vessel 1 2 into the water supply line if a vacuum is created in the supply line.
• a vacuum is created in the water supply line a plunger 1 50 is moved upward toward inlet 1 44 effectively permitting air from open end 1 52 to be introduced into the supply line. Movement of plunger 50 also provides an exit to atmosphere of any residual water within the tank in the event of such a vacuum in the supply line.
• a water inlet feed line (not shown) is secured to inlet 1 44.
• the connection between the water inlet feed line and the inlet 1 44 may be any connection known in the art. Preferably, the connection is non-permanent. Since the connection may be located in a wall cavity, ideally, the connection would be a quick release attachment that does not require tools.
• a threaded connection 1 54 is shown in FIG. 8. When the water feed line is pressurized, water flows through inlet 1 44 and the pressure pushes spring biased plunger 1 50 downward allowing the water to flow into pressure regulator 26. An o- ring 1 51 forms a seal to prevent water from flowing out of open end 1 52.
• Pressure regulator 26 is formed by assembling first module 1 48 to second module 1 56.
• First module 148 houses a first check valve ball 1 58 and check valve ball housing 1 60. This check valve ball 1 58 also acts as a seat to the orifice 1 70 of piston 1 68 as will be described below.
• a regulator spring 1 62 is captured in a preloaded state between first module 1 48 and the second module 1 56. First and second modules 1 48, 1 56 are secured to one another with a pair of tabs 1 64 on one module being received within a pair of slots 1 66 on the other module as illustrated in FIGS. 5 and 6. Regulator spring 1 62 biases a hollow piston 1 68 away from the first check valve ball 1 58.
• the first check valve ball 1 58 along with a second check valve ball 1 72 also serve to prevent back flow of water in the vessel when the pressure in the supply line drops below the pressure of the water in the vessel.
• first and second ball valves 1 58, 1 72 engage seal surfaces 173, 174 respectively to prevent back flow of water from vessel 1 2 into the water supply line.
• second module 1 56 also includes aerator 28.
• the pressure within the vessel is the same pressure forcing the aerator ball 1 76 against its seat 1 80.
• the pressure drops within the vessel 1 2 and beneath the aerator ball valve 1 76.
• water from the supply line begins to flow through the regulator, past the aerator and into the vessel.
• the design of the aerator initiates a venturi.
• ball 1 78 drops from its seat or sealing surface 1 80 and air is "sucked" into the vessel 1 2 along with the water.
• the aeration of the incoming water ensures that vessel 1 2 does not become water logged.
• Sufficient amount of air in system 10 provides sufficient energy to substantially clear vessel 1 2 of water during each flush.
• Aerator 28 includes a hollow tube 1 82 extending downward from aerator ball valve 1 76 into an inlet cavity 1 84 and terminating proximate the inlet of a lower portion 1 86. Water enters inlet cavity 1 84 from regulator 26 and flows around hollow tube 1 82 into lower portion 1 86 that is in fluid communication with fill tube 1 8 when cap assembly 1 4 is installed. The outer diameter of hollow tube 1 82 is less then the inner diameter of lower portion 1 86.
• actuator 30 includes a first opening 1 88 in fluid communication with inlet cavity 1 84 of aerator 28.
• Actuator 30 further includes an opening 1 90 in fluid communication with flush valve cavity 48 and another opening 1 92 in fluid communication with discharge tube 20.
• An extension 1 94 extends downward from actuator 30 proximate second opening 1 92 to receive discharge tube 20.
• vessel 1 2 is flushed by reducing the pressure in flush valve cavity 48 thereby creating a pressure imbalance between the flush valve cavity 48 and the rest of the vessel 1 2.
• the pressure imbalance results in the flush valve assembly being moved upward off of sealing surface 80, and permitting water in vessel 1 2 to exit.
• actuator button In a first closed position illustrated in FIG. 7 actuator button is biased outwardly and water is prohibited from flowing from flush valve cavity 48 into discharge tube 20.
• actuator button 1 46 is depressed to a second flush position, a path is created between opening 1 90 and opening 1 92, allowing water in flush valve cavity 48 to flow through actuator 30 and into discharge tube 20.
• Actuator button 1 46 is attached to an actuator stem 1 96 having a stem base 1 98 and is located in actuator housing 200.
• a spring 202 biases stem 1 96 outwardly, such that stem base 1 98 is biased against a seal seat 204, preventing water from flowing from flush valve cavity 48 through actuator housing 200 and through valve body opening 201 and into discharge tube 20.
• stem base 1 98 is moved off of seal seat 204 and water is able to pass through actuator housing 200 and into discharge tube 20.
• a pin 206 is attached to stem base 1 98 and extends through opening 1 88 that is in fluid communication with inlet cavity 1 84 of the aerator 28.
• the diameter of pin 206 is .086 inches and the diameter of opening 1 84 is .089 inches creating a small annular opening between the inlet cavity 1 84 of the aerator 28 and actuator 30.
• This small opening regulates the rate at which water can enter the flush valve cavity 48 to ensure that the flush valve assembly remains in the raised position for a sufficient amount of time to permit full evacuation of vessel 1 2 when flushed.
• Other diameters or shapes of the components may be employed to regulate the flow of water into flush valve cavity 48. It is possible to vary the size of the opening, thereby varying the flow rate into the flush valve cavity 48. Movement of pin 206 within opening 1 88 further acts as a self-cleaning device to keep opening 1 88 clear of debris.
• actuator 30 includes an electronic or automatic flush device 208 (shown in phantom) that includes a solenoid valve in conjunction with a sensor activator.
• the electronic device permits fluid to flow from the valve cavity 48 to discharge tube 20 through a first opening located in boss extension 21 0 and a second opening located in a second boss extension 21 2.
• Bosses 21 0, 21 2 may also serve to support the solenoid valve.
• actuator 30 may be manufactured with bosses 210, 21 2 with a solid bottom that could be drilled or punched to create openings, if the electronic actuator option is desired. In this manner a single actuator body may be used for both the manual actuator and electronic actuator.
• actuator 30 along with a cover member 21 4 form the third module 21 6.
• Cover member 21 4 covers flush valve cavity 48.
• An o-ring 21 8 is attached to a lower portion of cover 21 4 and engages flush valve cavity wall 44 proximate opening 38 in vessel 1 2.
• Cover member 21 4 includes an opening 21 5 that receives a pressure relief valve 220 to permit release of pressure when cap assembly 14 is removed. Vent release includes a base portion 222 and an upper portion 224 with a tab extending from upper the top of upper portion 224. When pressure relief valve 220 is in the closed position as illustrated in FIG. 2C, the top of upper portion 224 is flush with the cover 21 4, and tab extension 226 overlies a portion of cover 21 4.
• Tab extension 226 serves to prohibit pressure relief valve 220 from falling into flush valve cavity 48.
• An o-ring 228 prohibits exchange of water or air from within flush valve cavity 48 and the atmosphere.
• Pin 22 as illustrated in FIGS. 2A and 2C overlies the top of upper portion 224 and locks pressure relief valve 220 in place until pin 22 is removed.
• FIGS. 2B and 2D once pin 22 is moved outward uncovering pressure relief valve 220, any pressure in flush valve cavity 48 will move pressure relief valve 220 upward until the base portion 222 hits the underside of cover 214. In this manner water under pressure within flush valve cavity 48 is permitted to escape into the atmosphere. With this escape bath established, a flush is initiated as if the actuator were opened.
• Pressure relief valve 220 prevents pin support ears 72 from breaking as pin 22 is pulled outward and cap assembly 1 4 is force upward off of vessel 1 2.
• Top and bottom sections 32, 34 are welded together using a vibration welder or by means of an adhesive that can withstand the design pressure of vessel 1 2.
• Fill tube 1 8, discharge tube 20, flush valve assembly 1 6 and cap assembly 14 are then attached to vessel 1 2.
• fill tube 1 8 is lowered into vessel 1 2 through opening 40, such that key 1 28 extends through key way 55.
• Lower end 88 of fill tube 1 8 is seated on post 86, and the lower portion of outwardly extending flange 1 22 is located within well 54 when full tube 1 8 is fully located in vessel 1 2.
• Fill tube 1 8 is then locked into place by rotating fill tube 1 8 until key 1 28 is moved away from key way opening 55.
• o-ring 1 26 effectively seals fill tube 1 8 from vessel 1 2.
• the location of key 1 28 below annular ledge 50 prohibits upward movement of fill tube 1 8.
• the upper end 1 20 of fill tube 1 8 extends above the top region 36 of vessel 1 2 to receive the lower portion 1 86 of inlet cavity 1 84.
• the top region 36 of vessel 1 2 and fill tube 1 8 include indicia indicating whether fill tube is in a locked position with key 1 28 below annular ledge 50 or whether fill tube is in the unlocked position with key 1 28 in alignment with key way opening 55.
• discharge tube 20 is inserted into discharge tube opening 42 until lower end 92 of discharge tube 20 is seated within hollow tube 90.
• O-ring 1 38 attached to lower end 92 of discharge tube 20 maintains an effective seal to prohibit fluid flow between vessel 1 2 and discharge tube 20 or hollow tube 90.
• Discharge tube 20 is locked into place by rotating discharge tube 20 until key 1 34 is moved away from discharge key way opening 57 such that key 1 34 is under ledge 52.
• the lower of two o-rings 1 36 serves to seal discharge tube 20 within opening 42 and the upper o-ring seals extension 1 94 of actuator 30.
• Indicia on both discharge tube 20 and vessel 1 2 indicate whether discharge tube 20 is locked into place with key 1 34 below ledge 52 or whether key 1 34 is in line with key way opening 57 and ready for removal.
• Flush valve assembly 1 6 is lowered into vessel 1 2 through flush valve opening 38 until valve seal surface 84 of flush valve assembly is in contact with lower seal surface 80 of vessel 1 2.
• cap assembly 1 4 is formed from thee separate modules 1 48, 1 56 and 21 6 that can be assembled and separated without the use of tools.
• first module 1 48 including water inlet 1 44 and vacuum breaker 24 is formed as one piece with a first portion of regulator 26.
• Second module 1 56 includes the second portion of regulator 26 and aerator 28.
• third module 21 6 includes actuator 30 and flush valve cover 21 4.
• First and second modules 1 48, 1 56 are attached by placing pair of tabs 1 64 within slots 1 66 and rotating the modules relative to one another to snap fit the tabs and slots together.
• Third module 21 6 includes a pair of cylindrical extensions 230 that are received within a pair of "L" shaped slots 232 in an extension 234 of second module 1 56.
• Second and third modules 1 56, 21 6 are attached by snap fitting the cylindrical extensions 230 within the shorter leg of the L-shaped slots 232.
• Fully assembled cap assembly 14 is secured to vessel 1 2 by simultaneously placing lower portion 1 86 of inlet cavity 1 84 into fill tube 1 8; placing cover 21 4 into flush valve cavity opening 38; and placing extension 1 73 of actuator 1 42 over discharge tube 20.
• Internal o-ring 1 29 on fill tube 1 8 effectively seals lower portion 1 86 of inlet cavity 1 84 to allow water to enter fill tube 1 8.
• O-ring 21 8 on cover 214 effectively seals the cover 21 4 to wall 44 of flush valve cavity 48.
• upper o-ring 1 36 on discharge tube 20 effectively seals extension member 1 94 on actuator 30.
• cap assembly has been attached to vessel 1 2, pin 22 is inserted through openings 74 of ears or supports 72 until upper portion 224 of pressure relief valve 220 is covered by pin 22.
• a hose connected to the water supply line is coupled to inlet 144 by means of a threaded attachment or any other type of connection know to one skilled in the art.
• actuator button 1 46 When the bowl is to be flushed, actuator button 1 46 is pressed inward moving stem base off of its seat 204 allowing water in the flush valve cavity 48 to escape through valve opening 201 and into the discharge tube 20 and out of vessel 1 2 through vessel exit 94. This escape of water from flush valve cavity 48 creates a pressure imbalance in vessel 1 2 and flush valve assembly 1 6 is lifted upward until the top of upper stem portion 1 04 hits the bottom of the cover 214. Once lower seat surface 84 of flush valve assembly 1 6 lifts off of valve seal surface 80, the water in vessel 1 2 is discharged through vessel exit 94 under pressure into the bowl. As the pressure in vessel 1 2 drops below the lower of the supply line pressure or the spring force of regulator 26, water enters vessel 1 2 from the water supply line.
• the predetermined rate of flow through opening 1 88 in actuator 30 is sufficient such that all water contained within vessel 1 2 is discharged from vessel and also such that water can enter into the empty vessel and exit through the vessel to sufficiently refill the toilet's bowl prior to the resealing of lower seal surface 84 to seal surface 80 of vessel 1 2.
• This water continues to enter vessel 1 2 until pressure in vessel 1 2 is equal to the water pressure in the water supply line or until the pressure in vessel 1 2 exceeds the spring force of regulator spring 1 62. Once water no longer enters vessel 1 2, the system is ready to be flushed again.
• Water closet system 1 0 described above includes a number of different features that may be used either alone or in combination. Each feature may provide benefits to a water closet system if employed individually or if employed in combination with other features. The benefits of a number of the features outlined above will now be further addressed. [0061 ] Fill tube 1 8 and discharge 20 both are locked to vessel 1 2 independently of cap assembly 1 4.
• cap assembly 1 4 acts on fill tube or discharge tube 20 alone or on vessel 1 2 itself.
• the reduction of pressure on cap assembly 1 4 also results from the size difference between the outer o-ring 1 26 that provides the seal between fill tube 1 8 and the smaller inner o-ring 1 29 that provides the seal between fill tube 1 8 and cap assembly 14.
• Pressure in vessel 1 2 acts on the outer o-ring 1 26 but only the force from pressure acting on the inner o-ring 1 29 pushes up on cap assembly 1 4.
• the pressure from vessel 1 2 acts on the outer o-ring 1 36 but no additional pressure acts on actuator 30 until a flush cycle is initiated.
• cap assembly 1 4 and vessel 1 2 provide a benefit regarding ease of assembly and repair.
• Prior art devices include components that are secured to the vessel with a separate gasket and a plurality of screws or a vertically mounted cylindrical cartridge requiring multiple rotations by means of a tool to disassemble.
• the use of o-ring seals and pin 22 for securing cap assembly 1 4 to vessel 1 2 permits assembly and disassembly without the use of any additional tools.
• Pin 22 may be designed with a pre-bend along its length to provide a spring-load to offset the pressure applied to cap assembly 1 4 that would otherwise tend to push cap assembly 1 4 off of vessel 1 2.
• pin 22 may include bent portions that provide a downward spring force against cap assembly 14 when fully set within supports 72.
• the pull pin design could be replaced with a snap-ring style retainer. This allows removal from above which would permit removal of the cap assembly when the vessel is placed in a traditional china tank. The pull pin allows cap assembly to be released from vessel 1 2 by pulling pull pin 22 in a direction perpendicular to the wall right through the access panel.
• cap assembly 1 4 If the access panel is positioned at the same height of the pull pin, a person wishing to remove cap assembly 1 4 from within the wall, pull pin is simply pulled directly outward through the access panel in a simple linear motion. To fully remove cap assembly 1 4 through access panel, cap assembly only need be lifted a sufficient amount for the o-ring seals and lower portions of cap assembly to clear vessel 1 2. Since cap assembly may be removed while still attached to a flexible water feed line, cap assembly is simply pulled through the access panel to be inspected, repaired, or replaced.
• the Access panel may have a bottom portion that is slightly below the pull pin 22 and having an upper edge located a sufficient height to permit cap assembly 1 4 to be move upward a sufficient distance to clear the vessel.
• Pressure relief valve 220 on cap assembly 1 4 minimizes the chance that one of ears 72 will break as pin 22 is removed from vessel 1 2. While it is possible to flush the system prior to removing pin 22, pressure relief valve provides an automatic flush if the user forgets to turn off the water and flush prior to disassembly. Without first removing the pressure from flush valve cavity 48, the support closer to front wall of vessel 1 2 may break due to the upward pressure on cap assembly 14 that would be concentrated on the single front support once pin 22 cleared the rear support 72. If a support 72 broke, the entire vessel would need to be replaced.
• Alternative securing devices may also be employed to replace the pin. For example, a rotating-pin or pins may be used that rotate into position over a portion of the cap assembly.
• a snap- ring may also be used, or any other mechanical fastener that can be used in conjunction with the o-ring seals to secure cap assembly to the vessel.
• the geometry of cap assembly 1 4 provides a number of advantages.
• the non-linear arrangement of the components allows the cap assembly to substantially fit between the front and rear walls of the vessel and between the towers.
• the geometry also allows the fill tube to be proximate the rear wall, and the discharge tube to be proximate the front wall.
• the actuator button is proximate the front wall conveniently placed for access through the wall.
• the modular system of the cap assembly also allows for easy service of the components without the need for tools.
• Opening 1 88 in actuator 30 allows the area to be inspected and cleaned by simply twisting and pulling apart second and third modules 1 56, 21 6. Opening 1 88 provides the flow rate into the flush valve cavity 48 that controls the timing of system 1 0. Accordingly, it is helpful to have easy access to opening 1 88 to ensure it is clear of debris. Additionally, access to opening 1 88 also ensures more reliable inspection of opening 1 88 prior to assembly.
• the combination of vacuum breaker 24 and part of regulator 26 in first module 1 48 provides for a reduction in the number of parts.
• Each module is formed from a common unitary housing with additional components added as illustrated. The common unitary housing of the modules also serves to reduce component cost and the cost of assembly and repair.
• Extension 76 includes a threaded connecting portion 250 that is either directly or indirectly coupled to the bowl via a pipe or the like. Because this extension 76 may be secured by means of a threaded nut to a china tank which is secured to a toilet bowl, any external force applied to the vessel 1 2 will be transmitted to the zone or mount 252 between the pressurized vessel and the extension 76. Unlike prior art, this zone 252 is not a pressurized zone. In this manner the failure mode has been eliminated or moved external from a pressurized portion of vessel 1 2. If force is applied to the connecting portion 250 either directly or through the bowl sufficient to crack the mount 252 just above the connecting portion 250, the failure will be in the non-pressurized region external to the pressurized portion of vessel 1 2. A failure to this zone 252 may necessitate replacement of vessel, however, the failure will not occur in the pressurized interior of the vessel.
• an outer sheath or jacket 236 may be used to substantially surround vessel 1 2 such that if a pressurized portion of vessel 1 2 leaks, water would be collected in jacket 236 and prevented from entering into the in-wall space.
• Jacket 236 includes an outer wall 248 extending completely around vessel 1 2 and extending from the bottom 254 of mount 252 toward the top region 36 of vessel 1 2.
• Jacket 236 terminates at an edge 240.
• Edge 240 is lower than the top region 36 of vessel 1 2 to provide free access to pull pin 22 and the cap assembly 14 for inspection, repair and/or removal and replacement.
• a bottom 242 of jacket 236 extends downward a non-horizontal angle to funnel any water that collects in the region 238 between vessel 1 2 and wall 248 of jacket 236 toward door 96. Any water than enters the collection region 238 will exit through door 236 and into the bowl.
• Jacket 236 includes an opening 246 that fits over connector 250. The lip around opening 246 sits against bottom 254 of mount 252. The nut that attaches a connector to a pipe or bowl sealing secures jacket 236 to bottom 254 of mount 252. Any water that is captured in collecting region 238 between vessel 1 2 and wall 248 flows though trap door 96 and into the toilet.
• jacket 236 is formed of plastic and includes inwardly extending ribs or structure to maintain a separation between vessel 1 2 and wall 248 to form the collecting region 238.
• vessel 1 2 could include outwardly extending structure that would maintain the separation between vessel 1 2 and jacket 236.
• jacket 236 may cover the entire vessel. If jacket 236 covers the entire vessel, jacket 236 may also include either a removable hood portion covering the upper region of vessel 1 2, or alternatively an access panel permitting access of the cap assembly.
• the access panel in the jacket could be substantially the same size as the access panel in the wall, or four inches by six inches, as one example.
• jacket 236 may be formed of multiple pieces that interlock or otherwise fit together so long as water that leaks from vessel 1 2, or cap assembly 1 4 or the supply is captured within the jacket and exits through the drain.
• the height of the jacket as measured from the bottom of the vessel should be a height sufficient to accommodate a full flow of water from the supply line, if the connection between the supply line and cap assembly / vessel should leak given a supply line static pressure of 80 psi.
• the jacket or sheath acts as a secondary containment vessel and is there to absorb water from a leaking or ruptured supply line flowing unrestricted.
• the jacket and drain have a sufficient size that permits an unrestricted flow of water from a supply line of 80 psi to exit through the drain without spilling into the wall cavity.

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• Health & Medical Sciences (AREA)
• Life Sciences & Earth Sciences (AREA)
• Engineering & Computer Science (AREA)
• Hydrology & Water Resources (AREA)
• Public Health (AREA)
• Water Supply & Treatment (AREA)
• Sanitary Device For Flush Toilet (AREA)

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• 2002
  • 2002-10-03 WO PCT/US2002/031626 patent/WO2004033808A1/en not_active Application Discontinuation
  • 2002-10-03 AU AU2002341953A patent/AU2002341953A1/en not_active Abandoned
  • 2002-10-03 EP EP02776114A patent/EP1549806A1/de not_active Withdrawn

Non-Patent Citations (1)

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