CA1071801A - Tank flushing means - Google Patents
Tank flushing meansInfo
- Publication number
- CA1071801A CA1071801A CA293,101A CA293101A CA1071801A CA 1071801 A CA1071801 A CA 1071801A CA 293101 A CA293101 A CA 293101A CA 1071801 A CA1071801 A CA 1071801A
- Authority
- CA
- Canada
- Prior art keywords
- tank
- flush
- valve
- water
- sealing member
- 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
Links
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- Sanitary Device For Flush Toilet (AREA)
Abstract
Abstract of the Disclosure An improved tank flushing system is described for use with a toilet bowl or other flushed system. me outflow of the flushing water from the tank for the flushing operation is controlled by a flush valve comprising a flexible sealing member mounted on the tank bottom and coupled to a float. The flush valve is opened as the sealing member is lifted by the flush lever and remains opened under the control of the float until a predetermined volume of flush water has flowed from the tank.
Description
-~ 107~801 This is a divisLon of my co-pending Canadian Patent Application No~ 233,235 filed August 11, 1975.
The present invention relates to an improved flush valve and sealing member for a flush tank used for toilet bowl~ and the like.
There are numerous tank-type flushing systems in use which utilize a number of differing devices for controlling the release of the flushing water from the filled tank and for automatically refilling the tank to a desired level after the flushing operation.
In general, these systems include a flushing stopper or ball which is raised by the flushing lever to release the flushing water from the tank and a water inlet valve or cock which is operated by a float, A discharge of the flush water from the tank drops the float and opens the inlet valve. The rising level of the water during the tank refilling raises the float back to an inlet valve shut-off position w~en the flush tank has been refilled to the desired level.
The improved flushing system of the present invention pro-vides an improved flush valve for an outlet in a flush tank having a liquid inlet for admitting liquid to a predetermined height in the tank comprising the combination of a resilient hinge-like tank outlet sealing member, a flush lever movably mounted on said tank, means for mounting said sealing member in said tank permitting said sealing member to be moved to and from a sealed position on said outlet, said mounting means including a generally vertical overflow tube operatively coupling said sealing member to said flush lever for said sealing and unsealing movement, a float member mounted on said overflow tube, and an aperture adjacent to the top of saia overflow tube positioned below said predetermined level when said overflow tube is in the sealed position.
A simplified control system for a flush tank is described utilizing a minimum nu~ber of moving parts and formed of parts most of which may -1- ~
B
.
107180~
be advantageously formed of plastic. The flush system has an improved water leveling means for the flushed receptacle.
The objects of the invention will be obvious upon an understanding of the illustrative embodiment about to be described or wiIl be indicated in the appended claims~ and various advantages not referred to herein will occur to one skilled in the art upon employment of the invention in practice.
A preferred embodiment of the invention has been chosen for pur-poses of illustration and description and is shown in the accompanying drawing~ forming a part of the specification~ wherein:
Figure 1 is a perspective view of a flushing system including a preferred embodiment of the present invention~ -Figure 2 is a vertical sectional view of the water inlet pipe and water inlet valve taken along line 2-2 on Figure 1~
Figure 3 is a vertical sectional view corresponding to Figure 2 iIlustrating the water inlet valve in its open and tank fiIling posit~on~.
` Figure 4 is a fragmentary top plan view of the water inlet pipe.
Figure 5 is a horizontal sectional view of the water inlet valve taken along line 5-5 on Figure 3~ ~ -Figure 6 is a horizontal sectional view of the water ;nlet pipe taken along l;ne 6-6 on Figure 3.
Figure 7 is an exploded perspective view of the water inlet valve.
Figure 8 is a fragmentary side elevation view~ partially in section~ of the upper portion of the tank flush valve~O
Figure 9 is a front elevational view of the flush tank~ partiaIly in section~ iIlustrating the tank flush valve in its closed position~
Figures 10~ 11 and 12 are vertical sectional views corresponding to Figure 9 ;llustrating the flush valve at successive positions during a flushing cycle~
Figure 13 is an enlarged detailed view partially in section of another embodiment of the upper portion of the tank flush valve.
'; ' 107~801 Referring to the drawings which illustrate a preferred embodiment of the invention and more particularly to Figure l~lat nush tankil is illustrated with sides 2 and a bottom 3 and having an open top for remov-ably receiving a cover (not shown). me tank 1 has an opening 4 in its bottom 3 for a water inlet pipe 5 and a spaced outlet 6 to accommodate the flush valve 7 which couples the flush tank 1 to a toilet bowl or other flushed device. A third aperture 8 in the upper portion of the tank sides
The present invention relates to an improved flush valve and sealing member for a flush tank used for toilet bowl~ and the like.
There are numerous tank-type flushing systems in use which utilize a number of differing devices for controlling the release of the flushing water from the filled tank and for automatically refilling the tank to a desired level after the flushing operation.
In general, these systems include a flushing stopper or ball which is raised by the flushing lever to release the flushing water from the tank and a water inlet valve or cock which is operated by a float, A discharge of the flush water from the tank drops the float and opens the inlet valve. The rising level of the water during the tank refilling raises the float back to an inlet valve shut-off position w~en the flush tank has been refilled to the desired level.
The improved flushing system of the present invention pro-vides an improved flush valve for an outlet in a flush tank having a liquid inlet for admitting liquid to a predetermined height in the tank comprising the combination of a resilient hinge-like tank outlet sealing member, a flush lever movably mounted on said tank, means for mounting said sealing member in said tank permitting said sealing member to be moved to and from a sealed position on said outlet, said mounting means including a generally vertical overflow tube operatively coupling said sealing member to said flush lever for said sealing and unsealing movement, a float member mounted on said overflow tube, and an aperture adjacent to the top of saia overflow tube positioned below said predetermined level when said overflow tube is in the sealed position.
A simplified control system for a flush tank is described utilizing a minimum nu~ber of moving parts and formed of parts most of which may -1- ~
B
.
107180~
be advantageously formed of plastic. The flush system has an improved water leveling means for the flushed receptacle.
The objects of the invention will be obvious upon an understanding of the illustrative embodiment about to be described or wiIl be indicated in the appended claims~ and various advantages not referred to herein will occur to one skilled in the art upon employment of the invention in practice.
A preferred embodiment of the invention has been chosen for pur-poses of illustration and description and is shown in the accompanying drawing~ forming a part of the specification~ wherein:
Figure 1 is a perspective view of a flushing system including a preferred embodiment of the present invention~ -Figure 2 is a vertical sectional view of the water inlet pipe and water inlet valve taken along line 2-2 on Figure 1~
Figure 3 is a vertical sectional view corresponding to Figure 2 iIlustrating the water inlet valve in its open and tank fiIling posit~on~.
` Figure 4 is a fragmentary top plan view of the water inlet pipe.
Figure 5 is a horizontal sectional view of the water inlet valve taken along line 5-5 on Figure 3~ ~ -Figure 6 is a horizontal sectional view of the water ;nlet pipe taken along l;ne 6-6 on Figure 3.
Figure 7 is an exploded perspective view of the water inlet valve.
Figure 8 is a fragmentary side elevation view~ partially in section~ of the upper portion of the tank flush valve~O
Figure 9 is a front elevational view of the flush tank~ partiaIly in section~ iIlustrating the tank flush valve in its closed position~
Figures 10~ 11 and 12 are vertical sectional views corresponding to Figure 9 ;llustrating the flush valve at successive positions during a flushing cycle~
Figure 13 is an enlarged detailed view partially in section of another embodiment of the upper portion of the tank flush valve.
'; ' 107~801 Referring to the drawings which illustrate a preferred embodiment of the invention and more particularly to Figure l~lat nush tankil is illustrated with sides 2 and a bottom 3 and having an open top for remov-ably receiving a cover (not shown). me tank 1 has an opening 4 in its bottom 3 for a water inlet pipe 5 and a spaced outlet 6 to accommodate the flush valve 7 which couples the flush tank 1 to a toilet bowl or other flushed device. A third aperture 8 in the upper portion of the tank sides
2 is provided to mount a flush handle 9 and an innerconnected flush lever 10 on asuitable shaft 11.
The improved water inlet and inlet valve will now be described with particular reference to Figures 2 through 70 The generally verticaIly mounted inlet pipe 5 is connected to the inlet open;ng 4 in the tank 1 by means of suitable unting and sealing washers 12 and 13 and a nut 140 me inlet pipe 5 including its mounting flange 15 is preferably formed of plastic but may be formed of corrosion resisting metalsO An interior thread 16 is provided at the top of the inlet pipe 5 for threadedly mounting the inlet valve 17. The ;nlet valve 17 comprises a body 18 including a valve seat 19 and a hoIlow central cavity 20 for passage of the incoming tank filling water. A valve stem 21 is slidably positioned in a stem receiving aperture 22 in the valve body 18. An enlarged lower sealing head 23 is provided on the stem 21 includ-ing a resilient valve seat engaging OLring or other suitable seat engaging sealing member 24. me stem 21 is in its closed position when it is raised as seen in Figure 20 The stem 21 is in its opened position when it is lowered~
as will be described more fully below~ to the position illustrated in Figure
The improved water inlet and inlet valve will now be described with particular reference to Figures 2 through 70 The generally verticaIly mounted inlet pipe 5 is connected to the inlet open;ng 4 in the tank 1 by means of suitable unting and sealing washers 12 and 13 and a nut 140 me inlet pipe 5 including its mounting flange 15 is preferably formed of plastic but may be formed of corrosion resisting metalsO An interior thread 16 is provided at the top of the inlet pipe 5 for threadedly mounting the inlet valve 17. The ;nlet valve 17 comprises a body 18 including a valve seat 19 and a hoIlow central cavity 20 for passage of the incoming tank filling water. A valve stem 21 is slidably positioned in a stem receiving aperture 22 in the valve body 18. An enlarged lower sealing head 23 is provided on the stem 21 includ-ing a resilient valve seat engaging OLring or other suitable seat engaging sealing member 24. me stem 21 is in its closed position when it is raised as seen in Figure 20 The stem 21 is in its opened position when it is lowered~
as will be described more fully below~ to the position illustrated in Figure
3. The upper portion of the valve body 18 includes an upwardly directed stud 25 which mounts a valve trip arm 26 in a groove 27 provided thereon so that the the trip arm 26 is free to rock under the control of the flush lever 10. A
hollow float 28 has a central aperture 29 which slidably engages the inlet pipe 5 permitting the float 28 to move vertically of the pipe with the tank water level during the flushing operationO The ~over 30 of the ~Loat has a central aperture 31 :
~071801 which slidably engages the stud 25 so that the attached float 28 and float cover 30 move between raised and lowered positions~ as illustrated in Figures 2 and 3~ respectively~ during the flushing actionO A hollow silencer 56 is positioned below the float 28. It is mounted on suitable flanges 57 on the inlet pipe 5~. In its preferred form it has a hollow inverted cone shape~ as illustratedr.
The operation of the ;nlet valve 17 during the nushing operation will now be described~
When the tank 1 is full prior to a flushing operation~ the inlet valve 17 is in the position illustrated in Figure 2; The valve stem 21 is in its closed or raised position, me float 28 is also in its fully raised position against the valve body 18 under the lifting force of the water in the fiIled tank l~o The valve trip arm 26 has its inner end 33 (Figure 1) resting lightly on the cover 30 of float 28 and it is held in this position by the attachment of its outer end 34 to a connecting stud 35 on the flush lever 10 (Figure 1). me valve 17 is held in its closed position by the force of the water in the inlet pipe 5 acting on the valve head 23. This force is sufficiently great to keep the valve 17 closed even though the float 28 may drop below the position illustrated due to a change in the tank water levelr. The weight of the float 28 on the valve stem 21 is insufficient to force the stem 21 downwardly against pressure of the water in the inlet pipe 5 without the added force from the trip arm 26~- This prevents serious water waste even though the tank flush valve leaks~0 When the tank 1 is flushed~ the flush handle 9 swings the flush lever 10 upwardly together with the attached outer end 34 of the valve trip arm 26. This causes the inner end portion 33 of the valve trip arm 26 on the float cover 30 to move downwardly forcing the float 28 and the valve stem 21 downwardly to the open position of the v~ve 17~ as illustrated in Figure 3~. At the same time the flush valve 7 in the flush tank 1 has been opened by the flush lever 10 permitting the water to flow out of the tank 107~801 1 and causing the float 28 to drop to the position illustrated in Figure 3, me weight of the float 28 on the valve stem 21 then holds the stem 21 open during the tank refilling operation until the float 28 has again been lifted by the rising water in the tank 1 to its upper position~ as illus-trated in Figure 2~ As the weight of the float 28 is supported by the rising water~ the force of the water flowing through the valve seat 19 raises the stem 21 closing the valve 17~. By this time~ the flush handle 9 will have been released so that the flush lever 10 will have returned to its lowered position as determined by the closed flush valve 7~. mis raises the inner end 33 of the valve trip arm 26 permitting the above described lifting of the float 28.
me preferred embodiment of the flush valve 7 wiIl now be describ-ed with reference to the drawings and particularly to Figures 1 and 8 through 12r. me function of the flush valve 7 is to release a predeter-mined volume of flush water from the tank 1 to the flushed bowl under the control of the flush handle 9. When the predetermined volume has been released~ the flush valve 7 closes permit~ing the tank 1 to be refiIled in the manner described above.
me flush valve 7 opens and closes the flush outlet 6 in the tank 1 which is connected by a suitable conduit 36 to the toilet bowl or other flushed device~. me valve 17 includes a valve seat 37 which may be pro-vided on the upper rim of the conduit 36 or otherwiseO A valve sealing member 38 includes ~ seal;ng section 39 and a spaced coupling section 40 which is attached by a bolt 41 or other means to the tank 1 bottom (Figure 1~
me preferred form of the sealing member 38 is a relatively flat member which is flexible or hinged adjacent the coupling section 40 to per-mit the lifting or open;ng action and which has a res;l;ent or soft seat engaging area in its sealing section 39. All of the above requirements are present in a preferred embodiment of the sealing member cut or molded as a 107180~
unitary member from rubber or plastic. Alternatively~ the sealing member 38 may be formed in one or more pieces with the necessary characteristics included at the sealing and coupling portionsO
me use of the coupling section 40 is seen to be advantageous as it provides a guide for the sealing section 39 as the sealing member 38 is lowered to its sealed position. This assures a correct reseal each time that the valve 7 closes to provide an extremely rel;able resealing action for the flush valve 70 A hollow overflow t~be4~is tightly coupled to and sealed to the central portion of the sealing section 39 by means of suit-able flanges 43 which provide a coupling groove 44 for the edges of anaperture 45 in the sealing member 38. The tube 42 provides a conauit bet-ween the upper portion of the tank 1 and the toilet bowl permitting water to overflow into the bowl whenever the level of the water within the tank 1 rises above its open top 460 The flush valve 7 is opened by the flush hand~e~9:i~hrpu~hdthe ~h~
interme~iation of the flush lever 10 which is coupled to the overflow tube 42 by the interlocking slot 47 in the pipe and slot 48 on the end of the lever 10 (Figure 9)0 When the flush handle 9 is turned, the overflow tube 42 and the sealing member 38 are raised to the position iIlustrated in Figure 10 thereby opening the outlet 6 and permitting the flush tank to drain into the toilet bowlO As this occurs~ the water pressure is equal-ized on opposite sides of the valve sealing member 38 above the open out-let 6. A float 49 attached to the overflow tube 42 now holds the ~ube 42 upwardly as the float rides on the fall;ng surface of the water 50 in the tank 1. The water 50 will continue to flow out of the tank 1 until the float 49 drops to a point where the sealing member 38 engages the valve seat 37 and closes the valve 7 (Figure 11).
As the above described flushing action is occurring, water 50 is entering the tank 1 through the water inlet pipe 5 as the inlet valve 17 has been opened when the flush handle 9 was activated in the manner described above. With the flush valve 7 closed~ water 50 rises in the tank 1 and submerges the float 49. me float 49 is proportioned so that it can-not lift the overflow tube 42 against the water pressure on the top of the valve sealing member 38 when the valve 7 is in its closed position~ as illustrated in Figure 120 me water level in the tank 1 will continue to rise until the inlet valve 17 is closed at a predetermined tank water level~
as described above, me float 49 is preferably adjustably positioned by friction or a set screw or otherwise on the tube 42 so that raising the float 49 on the tube 42 reduces the volume of the flush water released~ and vice versaO
The overflow tube 42 is used to provide a toilet bowl leveling action to restore the bowl water level to the desired point after the flushing operationO mis is done by discharging a portion of the water entering the flush tank 1 during the tank refilling downwardly through the overflow tube 42.
Figures 1 and 8 illustrate one embo~;ment of this system which comprises a refill tube 51 which communicates at 54 with the ;nlet valve cavity 20 at one end 52 and which has its opposite end 53 positioned with-in the overflow tube 420 When the inlet valve 17 is opened during the tank refiIl~ a portion of the water being fed into the tank 1 will be diverted through the tube 51 into the toilet bowl to restore its leveL
Figure 13 iIlustrates an alternative embodiment of the toilet - bowl leveling systemO In this embodiment~ the outlet 54 in the inlet valve 17 is eliminated together with the tube 51 and they are replaced by an ap-erture 55 near the top of the overflow tube 42Ao A portion of the water 50 in the tank 1 flows through the aperture 55 and down the overflow tube 42 to restore the toilet bowl levelO me amount of water 50 which thus flows through the aperture 55 is determined by the adjustment of the inlet valve 17 cut-off point. As already described, the inlet valve 17 closes when ~ 30 the float 28 has been lifted a predetermined distance in the tank 1 during :
_7-:
the refilling operationO mis cutoff point determines the uppermost level of the water in the tank 1 at a level somewhat above the level of the aper-ture 55 to provide the toilet bowl leveling water. As also already indicat-ed,the improved inlet valve 17 described above~ shuts off when the water in the tank 1 reaches a predetermined level and does not then reopen even though the tank water level fallsO mis permits the above described flow of a volume of bowl leveling water downwardly through the aperture 55 and the overflow tube 420 It will be seen that the present invention provides a flushing device formed of a relative few parts of simplified form with an improved and more reliable flushing operationn An improved inlet valve in the device is adapted for having important components formed from molded plastic.
me relatively inexpensive and easily manufactured inlet valve may be used to replace units in existing flush tank configurationsO
me valve is opened with a flush lever and stays shut after the flush tank is filledi~even though water may leak from the flush tark there-by preventing a continuing water lossO
A cooperating and improved flush valve is provided which gives a more reliable closing action and which combines flush tank overflow and toilet bowl leveling features with means for adjustably determining the volume of water used in each flushing operationO
As various changes may be made in the form~ construction and arrangement of the parts herein without departing from the spirit and scope of the invention and without sacrificing any of its advantages~ it is to be undersood that all matter herein is to be interpreted as illustrative and not in a limiting senseO
-, -' ' . ' . , ., - '
hollow float 28 has a central aperture 29 which slidably engages the inlet pipe 5 permitting the float 28 to move vertically of the pipe with the tank water level during the flushing operationO The ~over 30 of the ~Loat has a central aperture 31 :
~071801 which slidably engages the stud 25 so that the attached float 28 and float cover 30 move between raised and lowered positions~ as illustrated in Figures 2 and 3~ respectively~ during the flushing actionO A hollow silencer 56 is positioned below the float 28. It is mounted on suitable flanges 57 on the inlet pipe 5~. In its preferred form it has a hollow inverted cone shape~ as illustratedr.
The operation of the ;nlet valve 17 during the nushing operation will now be described~
When the tank 1 is full prior to a flushing operation~ the inlet valve 17 is in the position illustrated in Figure 2; The valve stem 21 is in its closed or raised position, me float 28 is also in its fully raised position against the valve body 18 under the lifting force of the water in the fiIled tank l~o The valve trip arm 26 has its inner end 33 (Figure 1) resting lightly on the cover 30 of float 28 and it is held in this position by the attachment of its outer end 34 to a connecting stud 35 on the flush lever 10 (Figure 1). me valve 17 is held in its closed position by the force of the water in the inlet pipe 5 acting on the valve head 23. This force is sufficiently great to keep the valve 17 closed even though the float 28 may drop below the position illustrated due to a change in the tank water levelr. The weight of the float 28 on the valve stem 21 is insufficient to force the stem 21 downwardly against pressure of the water in the inlet pipe 5 without the added force from the trip arm 26~- This prevents serious water waste even though the tank flush valve leaks~0 When the tank 1 is flushed~ the flush handle 9 swings the flush lever 10 upwardly together with the attached outer end 34 of the valve trip arm 26. This causes the inner end portion 33 of the valve trip arm 26 on the float cover 30 to move downwardly forcing the float 28 and the valve stem 21 downwardly to the open position of the v~ve 17~ as illustrated in Figure 3~. At the same time the flush valve 7 in the flush tank 1 has been opened by the flush lever 10 permitting the water to flow out of the tank 107~801 1 and causing the float 28 to drop to the position illustrated in Figure 3, me weight of the float 28 on the valve stem 21 then holds the stem 21 open during the tank refilling operation until the float 28 has again been lifted by the rising water in the tank 1 to its upper position~ as illus-trated in Figure 2~ As the weight of the float 28 is supported by the rising water~ the force of the water flowing through the valve seat 19 raises the stem 21 closing the valve 17~. By this time~ the flush handle 9 will have been released so that the flush lever 10 will have returned to its lowered position as determined by the closed flush valve 7~. mis raises the inner end 33 of the valve trip arm 26 permitting the above described lifting of the float 28.
me preferred embodiment of the flush valve 7 wiIl now be describ-ed with reference to the drawings and particularly to Figures 1 and 8 through 12r. me function of the flush valve 7 is to release a predeter-mined volume of flush water from the tank 1 to the flushed bowl under the control of the flush handle 9. When the predetermined volume has been released~ the flush valve 7 closes permit~ing the tank 1 to be refiIled in the manner described above.
me flush valve 7 opens and closes the flush outlet 6 in the tank 1 which is connected by a suitable conduit 36 to the toilet bowl or other flushed device~. me valve 17 includes a valve seat 37 which may be pro-vided on the upper rim of the conduit 36 or otherwiseO A valve sealing member 38 includes ~ seal;ng section 39 and a spaced coupling section 40 which is attached by a bolt 41 or other means to the tank 1 bottom (Figure 1~
me preferred form of the sealing member 38 is a relatively flat member which is flexible or hinged adjacent the coupling section 40 to per-mit the lifting or open;ng action and which has a res;l;ent or soft seat engaging area in its sealing section 39. All of the above requirements are present in a preferred embodiment of the sealing member cut or molded as a 107180~
unitary member from rubber or plastic. Alternatively~ the sealing member 38 may be formed in one or more pieces with the necessary characteristics included at the sealing and coupling portionsO
me use of the coupling section 40 is seen to be advantageous as it provides a guide for the sealing section 39 as the sealing member 38 is lowered to its sealed position. This assures a correct reseal each time that the valve 7 closes to provide an extremely rel;able resealing action for the flush valve 70 A hollow overflow t~be4~is tightly coupled to and sealed to the central portion of the sealing section 39 by means of suit-able flanges 43 which provide a coupling groove 44 for the edges of anaperture 45 in the sealing member 38. The tube 42 provides a conauit bet-ween the upper portion of the tank 1 and the toilet bowl permitting water to overflow into the bowl whenever the level of the water within the tank 1 rises above its open top 460 The flush valve 7 is opened by the flush hand~e~9:i~hrpu~hdthe ~h~
interme~iation of the flush lever 10 which is coupled to the overflow tube 42 by the interlocking slot 47 in the pipe and slot 48 on the end of the lever 10 (Figure 9)0 When the flush handle 9 is turned, the overflow tube 42 and the sealing member 38 are raised to the position iIlustrated in Figure 10 thereby opening the outlet 6 and permitting the flush tank to drain into the toilet bowlO As this occurs~ the water pressure is equal-ized on opposite sides of the valve sealing member 38 above the open out-let 6. A float 49 attached to the overflow tube 42 now holds the ~ube 42 upwardly as the float rides on the fall;ng surface of the water 50 in the tank 1. The water 50 will continue to flow out of the tank 1 until the float 49 drops to a point where the sealing member 38 engages the valve seat 37 and closes the valve 7 (Figure 11).
As the above described flushing action is occurring, water 50 is entering the tank 1 through the water inlet pipe 5 as the inlet valve 17 has been opened when the flush handle 9 was activated in the manner described above. With the flush valve 7 closed~ water 50 rises in the tank 1 and submerges the float 49. me float 49 is proportioned so that it can-not lift the overflow tube 42 against the water pressure on the top of the valve sealing member 38 when the valve 7 is in its closed position~ as illustrated in Figure 120 me water level in the tank 1 will continue to rise until the inlet valve 17 is closed at a predetermined tank water level~
as described above, me float 49 is preferably adjustably positioned by friction or a set screw or otherwise on the tube 42 so that raising the float 49 on the tube 42 reduces the volume of the flush water released~ and vice versaO
The overflow tube 42 is used to provide a toilet bowl leveling action to restore the bowl water level to the desired point after the flushing operationO mis is done by discharging a portion of the water entering the flush tank 1 during the tank refilling downwardly through the overflow tube 42.
Figures 1 and 8 illustrate one embo~;ment of this system which comprises a refill tube 51 which communicates at 54 with the ;nlet valve cavity 20 at one end 52 and which has its opposite end 53 positioned with-in the overflow tube 420 When the inlet valve 17 is opened during the tank refiIl~ a portion of the water being fed into the tank 1 will be diverted through the tube 51 into the toilet bowl to restore its leveL
Figure 13 iIlustrates an alternative embodiment of the toilet - bowl leveling systemO In this embodiment~ the outlet 54 in the inlet valve 17 is eliminated together with the tube 51 and they are replaced by an ap-erture 55 near the top of the overflow tube 42Ao A portion of the water 50 in the tank 1 flows through the aperture 55 and down the overflow tube 42 to restore the toilet bowl levelO me amount of water 50 which thus flows through the aperture 55 is determined by the adjustment of the inlet valve 17 cut-off point. As already described, the inlet valve 17 closes when ~ 30 the float 28 has been lifted a predetermined distance in the tank 1 during :
_7-:
the refilling operationO mis cutoff point determines the uppermost level of the water in the tank 1 at a level somewhat above the level of the aper-ture 55 to provide the toilet bowl leveling water. As also already indicat-ed,the improved inlet valve 17 described above~ shuts off when the water in the tank 1 reaches a predetermined level and does not then reopen even though the tank water level fallsO mis permits the above described flow of a volume of bowl leveling water downwardly through the aperture 55 and the overflow tube 420 It will be seen that the present invention provides a flushing device formed of a relative few parts of simplified form with an improved and more reliable flushing operationn An improved inlet valve in the device is adapted for having important components formed from molded plastic.
me relatively inexpensive and easily manufactured inlet valve may be used to replace units in existing flush tank configurationsO
me valve is opened with a flush lever and stays shut after the flush tank is filledi~even though water may leak from the flush tark there-by preventing a continuing water lossO
A cooperating and improved flush valve is provided which gives a more reliable closing action and which combines flush tank overflow and toilet bowl leveling features with means for adjustably determining the volume of water used in each flushing operationO
As various changes may be made in the form~ construction and arrangement of the parts herein without departing from the spirit and scope of the invention and without sacrificing any of its advantages~ it is to be undersood that all matter herein is to be interpreted as illustrative and not in a limiting senseO
-, -' ' . ' . , ., - '
Claims (3)
PROPERTY OR PRIVILEDGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. An improved flush valve for an outlet in a flush tank having a liquid inlet for admitting liquid to a predetermined height in the tank comprising the combination of a resilient hinge-like tank outlet sealing member, a flush lever movably mounted on said tank, means for mounting said sealing member in said tank permitting said sealing member to be moved to and from a sealed position on said outlet, said mounting means including a generally vertical overflow tube operatively coupling said sealing member to said flush lever for said sealing and unsealing movement, a float member mounted on said overflow tube, and an aperture adjacent to the top of said overflow tube positioned below said predetermined level when said overflow tube is in the sealed position.
2. The flush valve as claimed in claim 1 in which said sealing member is a unitary relatively flat member with one end thereof attached to said tank, and a spaced portion thereof at an opposite end being coupled to said tube and positioned for sealing the tank outlet.
3. The flush valve as claimed in claim 1 in which said float member is adjustably positioned on said overflow tube for movement therealong to adjust the flush valve closing position in accordance with the depth of liquid in the tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA293,101A CA1071801A (en) | 1974-09-26 | 1977-12-15 | Tank flushing means |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US05/509,648 US3982556A (en) | 1974-09-26 | 1974-09-26 | Tank flushing means |
| CA233,235A CA1025604A (en) | 1974-09-26 | 1975-08-11 | Tank flushing means |
| CA293,101A CA1071801A (en) | 1974-09-26 | 1977-12-15 | Tank flushing means |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1071801A true CA1071801A (en) | 1980-02-19 |
Family
ID=27164071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA293,101A Expired CA1071801A (en) | 1974-09-26 | 1977-12-15 | Tank flushing means |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1071801A (en) |
-
1977
- 1977-12-15 CA CA293,101A patent/CA1071801A/en not_active Expired
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