U.S. patent number 3,695,288 [Application Number 05/074,606] was granted by the patent office on 1972-10-03 for remotely actuated flush valves.
This patent grant is currently assigned to Sloan Valve Company. Invention is credited to Charles S. Allen, Henry R. Billeter.
United States Patent |
3,695,288 |
Billeter , et al. |
October 3, 1972 |
REMOTELY ACTUATED FLUSH VALVES
Abstract
The flush valve is located behind a wall and is hydraulically
actuated by a push button on the front wall. The operating button
is connected to the inlet supply line and to a piston in the flush
valve handle coupling, over a pair of small copper tubes. The tubes
allow for variations in roughing-in measurement and wall thickness,
and can be of any length.
Inventors: |
Billeter; Henry R. (Deerfield,
IL), Allen; Charles S. (Oak Park, IL) |
Assignee: |
Sloan Valve Company
(N/A)
|
Family
ID: |
22120494 |
Appl.
No.: |
05/074,606 |
Filed: |
September 23, 1970 |
Current U.S.
Class: |
137/360; 4/249;
251/29; 251/41 |
Current CPC
Class: |
E03D
5/024 (20130101); Y10T 137/698 (20150401) |
Current International
Class: |
E03D
5/02 (20060101); E03D 5/00 (20060101); F16k
031/143 () |
Field of
Search: |
;251/41,28,29,295,33,38,40,57 ;137/360 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Rosenthal; Arnold
Claims
What is claimed is:
1. In a flush valve operating arrangement, an actuating unit
mounted on said flush valve, a remotely located manually operated
unit, a pair of flexible tubes extending between said flush valve
unit and said remote operated unit, one of said flexible tubes
being under supply line pressure, means in said remote operated
unit for connecting the supply line pressure from the said one tube
to the other tube, said actuating unit including a housing, an
inlet connected to said other of said flexible tubes, and a piston
responsive to said supply line pressure for actuating said flush
valve, means in said actuating unit for reducing the line pressure
in said other tube after said remote operated unit means is
restored and said flush valve has been operated including an
opening in said piston, and spacing means on said piston arranged
between said housing and the pressure side of said piston for
normally spacing said piston from said housing to maintain constant
communication between said opening and said other of said flexible
tubes, to permit drainage of said other flexible tube and said
housing through said piston opening and into the outlet of said
flush valve.
2. In a flush valve operating arrangement, an actuating unit
mounted on said flush valve, a manually operated unit located at a
remote point from said flush valve, a pair of flexible tubes
extending between said flush valve and said remote operated unit,
one of said flexible tubes being normally at zero supply line
pressure and connecting said remote operated unit and said
actuating unit, the other of said flexible tubes being normally at
supply line pressure and connecting said remote operated unit with
the inlet supply side of said flush valve, means in said remote
operated unit for admitting the supply line pressure from said
other tube into the first tube, means in said actuating unit
responsive to said said supply line pressure in said first tube for
operating said flush valve, and means in said actuating unit for
bleeding off the supply line pressure in said first flexible tube
after said remote operated unit has been restored and said flush
valve has been operated, means in said flush valve for closing it
upon its seat after having been operated regardless of the
continued operation of said remote operated unit, the bleeding off
of the supply line pressure being reduced to a dribble into said
flush valve outlet from said supply line.
3. In a flush valve operating arrangement for a flush valve located
behind a wall, an actuating unit supported on said flush valve, a
remote manually operated unit mounted on the front of the wall, a
first flexible tube extending between said manually operated unit
and said actuating unit, a second flexible tube extending between
said manually operated unit and said flush valve, said second
flexible tube being normally under zero line pressure, valve means
in said remote manually operated unit operable for admitting the
supply line pressure from said second flexible tube into said first
flexible tube, and piston means in said actuating unit responsive
to said supply line pressure being admitted into said first
flexible tube for causing the operation of said flush valve, means
in said piston for reducing the supply line pressure after said
remote operating unit has been released and said piston restored,
said piston being continually held operated in case said remote
operating unit is not released, said reduced line pressure being
thereby expelled through said piston means into said flush valve
outlet, and means in said flush valve for closing its valve seat in
case the piston is held operated by said remote operating unit.
4. The flush valve operating arrangement as set forth in claim 3 in
which the piston in said actuating means is provided with an
orifice for reducing the line pressure in said first flexible tube
when said remote manually operated unit is restored.
5. The flush valve operating arrangement as set forth in claim 3 in
which the remote manually operated unit consists of a push button
adapted to open and close a valve member from its valve seat to
establish communication between said flexible tubes.
6. The structure of claim 1 further characterized in that said
spacing means includes a plurality of projections on the pressure
side of said piston.
7. In a push button assembly for operating a flush valve located at
a remote point from the push button assembly and behind a wall,
said push button assembly being supported upon the front wall
surface and having a rearwardly extending body portion passing
through the wall, a pair of fluid passages in said body portion
extending to the rear of said body portion, a flexible tube
connected to each of said fluid passages and to said flush valve, a
valve cage in said body portion having fluid ports therein leading
into said body passages, said valve cage having a valve seat
therein and a valve member normally closed upon said valve seat,
spring means in said valve cage for holding said valve member on
its seat, said valve member also being held on its seat by fluid
pressure in one of said flexible tubes, a plunger in said body
portion having one end in operative relation to said valve member
for opening the same from its seat, a push button on the front of
said assembly in operative relation to the other end of said
plunger for actuating the same, spring means for normally biasing
said push button and said plunger away from said valve member,
sealing means between said valve cage and said body fluid passages,
other sealing means around said plunger, a bushing secured to the
front end of said body portion for clamping said last sealing means
and said valve cage in position in said body portion, a mounting
flange supported on the front end of said body portion and against
said wall, a cover plate for said mounting flange and for
supporting said push button in position on the end of said plunger,
and cooperating locking means for locking said cover plate to said
mounting flange.
Description
BACKGROUND OF THE INVENTION
The invention relates generally to the operation of flush valves
for plumbing fixtures from a remotely located operating button, and
the principal object of the invention is to provide a new and
improved hydraulic actuating mechanism for the aforesaid
purpose.
In many plumbing installations it is desirable that the flush
valves for flushing the water closets and urinals be concealed
behind the toilet room wall in front of which the plumbing fixture
is located. In such an arrangement, it is necessary that the handle
or push button for operating the flush valve be mounted on the
front wall where it is readily accessible to the user of the
fixture, while the rigid extension coupling for the handle passes
through the wall and is rigidly connected to the flush valve. Upon
installing such concealed flush valves, the plumber was formerly
confronted with the problem of ordering the correct length of rigid
handle coupling because of the many different wall thicknesses
encountered and which may be changed when the wall is finally
finished. Furthermore it was always difficult for the plumber to
accurately line up the flush valve with the opening in the wall
through which the handle or push button protrudes. It was also
necessary for him to place the flush valve to the left of the
closet bowl so the operating handle or push button would be
accessible to the user on that side of the bowl. This installation
therefore required the use of additional elbows and piping
connections extending from the flush valve outlet to the closet
bowl, thereby increasing the costs of labor and materials. The
dimensions also had to be fairly accurate so that a neat
installation would be presented, a difficult task for the
plumber.
SUMMARY OF THE INVENTION
The foregoing disadvantages are all overcome by the present
invention in which a novel remotely controlled actuator and
hydraulic mechanism is provided for operating the flush valve. The
push button actuating mechanism is universally adapted for any wall
thickness which may be encountered on a job; the roughing-in
dimensions of the flush valve need not be accurately made; the
installation is much cheaper and simpler; and the need for the
plumber to stock rigid handle extensions of different lengths for
various wall thicknesses, is eliminated.
An object of the invention therefore is to design a new and
improved flush valve actuating mechanism which is positive and
reliable in operation, simple in construction, easy to install, is
adaptable to various wall thicknesses, and solves many unforeseen
problems encountered in installation.
Another object of the invention is to utilize the hydrostatic
pressure of the inlet water supply line for actuating the operating
mechanism to cause the flush valve to operate.
A feature of the invention resides in the provision of a piston
actuator on the flush valve responsive to the supply line pressure
and which has an orifice therein smaller in diameter than the inlet
connection to the piston, thereby providing a pressure drop across
the piston insuring the positive operation of the piston. The
orifice also serves to relieve the pressure on the front side of
the piston permitting its restoration, after the inlet pressure has
been disconnected by the push button.
With the foregoing and other objects in view, the invention
consists of certain novel features of construction, operation, and
combination of elements which will be more fully described,
illustrated, and pointed out hereinafter.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a partial cross-sectional side view of a typical plumbing
installation illustrating the invention;
FIG. 2 is a cross-sectional side view of the push button operating
unit mounted in the wall;
FIG. 3 is a partial cross-sectional side view of the actuating unit
attached to the flush valve; while
FIG. 4 is a cross-sectional side view of a modified form of the
push button operating unit.
DETAILED DESCRIPTION
Referring to FIG. 1, this illustrates a typical installation of a
wall hung water closet bowl 5 mounted on a wall surface 6 and
connected with a commercially known type of flush valve such as a
"Sloan Crown" flush valve 7 for flushing the water closet 5. A
throttle valve 8 is attached to the inlet side of the flush valve 7
and to the inlet water supply pipe 9. The outlet flush pipes 10 and
11 from the flush valve 7 lead into the closet bowl 5 in the usual
manner. An operating push button assembly 12 for operating the
flush valve 7 is mounted on the front of the wall surface 6 in any
desirable location where it is readily accessible to a person using
the water closet. If desired, the common hand operated handle could
be substituted for the push button 12. The manual operating unit or
assembly indicated generally at 13 is supported in the wall 6 while
the actuating unit assembly indicated generally at 14, FIG. 3, is
mounted directly upon the usual handle opening of the flush valve
7. A pair of small flexible tubes, preferably copper tubing such as
15 and 16, extends between the assembly units 13 and 14 and the
flush valve 7. The flexible tube 15 is normally under constant
hydraulic pressure from the water supply line 9 and the inlet side
of the flush valve, while the tube 16 is normally at zero line
pressure.
The manually operated assembly unit 13 as seen in FIG. 2 has a
rearwardly extending body portion 20 passing through an opening 21
cut in the wall 6. The unit 13 has a mounting flange 22 which
clamps against the front wall surface 6 and is threaded at 23 onto
the left hand end of the body 20. A cover plate 24 encloses the
mounting flange 22 and is attached thereto by slipping the angular
periphery of the cover plate 24 over the inclined surface 25 formed
in the mounting plate 24. At one edge a locking screw 26 holds the
cover plate 24 securely to the mounting flange 22. The push button
12 protrudes from the center of the cover plate 24 and is spring
pressed against the inner side 27 of the cover plate opening by
spring 65.
At the rear end of the body portion 20 a threaded stud 30 is
screwed into the unit. This stud 30 may be of any desired length
and passes through a hole in a U-shaped mounting bracket 31, the
two legs of which straddle the body 20 and bear against the rear
wall surface 6. A clamping nut 32 is threaded on the stud 30 so
that the push button unit 13 is firmly clamped to the wall 6
between the front mounting plate 22 and the bracket 31. In this
manner the push button unit 13 is adapted to be solidly supported
in position regardless of the thickness of the wall 6. The unused
end of the stud 30 may be cut off if desired.
The push button assembly 13 includes a valve arrangement comprising
a ball type valve member 35 normally seated upon valve seat 36
formed in a valve or sleeve cage 37. The valve cage 37 is of hollow
tube shape and fitted into a hollow portion or chamber 38 formed
axially within the body 20. A light spring 39 normally holds the
ball valve member 35 closed on its seat 36, and a pin 40 across the
end of valve cage 37 holds the spring 39 in place. An O-ring seal
41 around the valve cage 37 seals it in the chamber 38 on each side
of the valve seat 36. An inlet fluid passage 45 is formed in body
portion 20 around chamber 38 and valve cage 37, and leads into
ports 46 and the inlet side of closed ball valve member 35. An
outlet fluid passage 47 leads into chamber 38 and into ports 48
formed in valve cage 37 which connect with the downstream side of
the valve seat 36. The flexible lengths of tubing 15 and 16 are
firmly connected to the end of their respective passages 45 and 47
by means of suitable compression fittings 49 and 50.
For actuating the ball valve member 35 a plunger 55 is provided
which is axially slidable within a threaded bushing 56 in turn
threaded at 57 into the front end of the body portion 20. One end
58 of plunger 55 is arranged in spaced operative relationship to
the ball valve member 35 while the opposite end has a headed part
59 formed on it. A restoring spring 65 extends between the head 59
and a recess 66 formed in bushing 56 to normally bias the plunger
55 against the under side of the push button 12 and hold it in
position against the ledge 27 of the cover plate 24. In order to
seal the plunger 55 in bushing 56 a cone type seal 67 surrounds the
plunger 55 and is clamped in position between the right hand end of
bushing 56 and the left end of valve cage 37. This seal 67 also
prevents leakage outward between the bushing 56, the body portion
20, the several passages, and ports in chamber 38 and valve cage
37.
Referring now particularly to FIG. 3, this shows the detail
structure of the actuating unit 14 for causing the flushing action
of the flush valve 7. The unit 14 comprises a cup-shaped casing 70
having a leak proof compression fitting 72 at its side end for
connection of the flexible tube 16 thereto. The opposite end of the
casing 70 has a shoulder 71 for the engagement of the coupling nut
73 which is threaded to the side of the flush valve body and
securely clamps the casing 70 in position on the valve. A sealing
gasket 74 is positioned between the shoulder 71 and the flush valve
opening. Slidable within the casing 70 there is a piston 75
preferably of rubber, which is exposed on the left hand side to the
pressure fluid when present, through flexible tube 16 and passage
76 into the casing 70. On the opposite side of piston 75 there is a
backing plate 75' and a plunger 77 attached thereto extending into
the flush valve body opening. The plunger 77 passes through the
bottom of a bushing 78 where it is guided in its forward movement
to control and trip the relief valve stem 90 of the flush valve to
cause the flush valve to operate. Bushing 78 is supported by being
clamped at its edges between the shoulder 71 and the valve body by
the coupling nut 73. A restoring spring 79 for the piston 75
encircles the plunger 77 and extends between the piston 75 and the
bushing 78. The bushing 78 has a drain opening 80 in one side which
is arranged to point downward towards the outlet of flush tube 10
of the flush valve 7. The piston 75 and its backing plate 75' also
have an opening or orifice 81 extending therethrough which opening
81 is somewhat smaller in diameter than the opening 80. The orifice
81 being smaller in diameter than the inlet passage 76, provides a
pressure drop across the piston to insure its positive
operation.
One of the lengths of flexible tubing 15 is connected by a
compression fitting 82 to the side wall of the flush valve body 7
so that the tubing 15 is constantly under water supply pressure
present above the flush valve seat 83 and the piston 84 and
extending from the control stop 8 and the inlet supply pipe 9. The
other flexible tubing 16 is connected to the casing 70 by the
compression fitting 72 and is under no particular fluid pressure
although it may contain some fluid, or even be empty.
It will be apparent that, with the foregoing construction as
described, it is immaterial in what position the flush valve is
located behind the wall 6 in relation to its operating push button
12. It may be at any remote location relative to the push button
and no particular problem need be experienced by the plumber in
installing or precisely positioning the flush valve. The flush
valve is amply supported by the flush tubes 10 and 11 from the wall
6 and by the inlet supply pipe 9. The flexible tubing 15 and 16 can
be cut to almost any length desired or bent in any direction
without kinking. The flush valve may therefore be located any
distance in back of the wall as well as either to the right or left
hand side of the push button or closet bowl. The flush valve
furthermore can be located either higher or lower than the push
button without affecting its reliable operation.
OPERATION OF THE INVENTION
In the operation of the remote flush valve arrangement, according
to the invention, the normal condition of the system is as
illustrated with the flexible tubing 15 under supply line pressure
from the inlet 9 to the ball valve member 35, while the tubing 16
is at zero pressure. The user of the equipment desiring to operate
the flush valve 7 to flush the water closet bowl 5, depresses the
push button 12. This action projects the plunger 55 inward to force
the ball valve member 35 off of its valve seat 36 against the fluid
pressure in chamber 45 and also against the tension of springs 65
and 39. The full supply line pressure now takes effect from the
flexible tubing 15, and the supply pipe 9.
Within the push button assembly 13 the fluid flow takes place over
a path through passages 45 of chamber 38, ports 46 in the sleeve
37, the open valve seat 36, ports 48 in sleeve 37, passage 47,
through the flexible tubing 16, and into the actuating unit 14. The
fluid pressure in tubing 16 is now exerted at the flush valve
through passage 76 of cup-shaped casing 70 and against the left
side of piston 75, projecting it forward in the casing 70 together
with the attached plunger 77. The end 85 of plunger 77 as a result
contacts the lower end of relief valve stem 90 in the flush valve
to tilt the same off its seat (not shown) resulting, in well known
manner, in the upward operation and movement of the flush valve
piston 84 from the main valve seat 83. Full water flow now takes
place from the inlet supply pipe 9, control stop 8, valve seat 83,
and downward through flush tubes 10 and 11 into the closet bowl,
flushing the same, as is well understood.
The fluid pressure from tubing 16 against piston 75 is rendered
more effective because the area of the piston exposed to this
pressure is at its maximum due to the presence of the small bumps
86 on the pressure side of the piston. These bumps 86 normally
space the piston slightly away from the bottom of the casing 70 and
also enable drainage to take place from the tube 16 and passage 76
outward through openings 81 and 80. The restricted orifice 81
provides a pressure drop across the piston to insure its positive
operation when the inlet pressure occurs on the front side of the
piston.
Upon the release of the push button 12 by the user, the plunger 55
is restored by spring 65 thereby permitting the ball valve member
35 to be seated upon its valve seat 36 and cutting off further flow
of pressure fluid from tubing 15 into tubing 16. As a further
result piston 75 is restored by spring 79 and any residual fluid is
drained out of the tube 16 and passage 76 in front of piston 75
through the bleed openings 81 and 80, offering no restriction to
the free restoring action of the piston. The drainage takes place
through opening 80 and downward at an angle into the flush tube 10
of the flush valve away from the end of the relief valve stem 90,
so as not to interfere with the operation of the flush valve.
In the event that the push button 12 is held operated an unduly
long time in an attempt to cause the continuous operation of the
flush valve, this action will be without effect. The flush valve 7
is provided with the usual telescoping relief valve stem 90 the end
of which comes to rest upon the top end 85 of the now inwardly held
plunger 77. The flush valve accordingly closes off upon the main
valve seat 83 to stop the flushing action. However since the ball
valve 35 would still be held off of its valve seat 36 and the
supply pressure holds the piston 75 operated, a slight dribble will
occur through the openings 80 and 81 into the flush valve outlet
tube 10. This is however without effect upon the operation of the
flush valve and when the push button 12 is again released the parts
are all restored to normal condition.
In certain instances it may be desirable to attach the pressure
tubing 15 directly to the body of the control valve 8 with the
compressing fitting 92 instead of to the flush valve body 7 by the
fitting 82 as shown in FIG. 3. This will enable all flush valves
manufactured to be of the same construction whether used for the
purpose of the present invention or not. It is obvious that the
standard flexible tubing employed can be of any length when
supplied to the job and simply cut off to the desired length to fit
the installation, the plumber furnishing the tubing and compression
fittings from his stock.
As a further alternate arrangement for mounting the push button
assembly 13 upon the wall and considered a more economical one,
several mounting screws in mounting plate 22 may be screwed into
suitable anchor lugs set in the wall 6. This does away with the use
of the clamping bracket 31, stud 30 and clamping nut 32. This
arrangement would also securely hold the push button assembly in
place regardless of the wall thickness.
Referring to the modification of the push button assembly shown in
FIG. 4, this is a structure employing fewer parts most of which may
be made of some suitable plastic material easily molded into the
desired shapes. The push button assembly may be supported on the
front of the wall surface 6 by means of a similar bracket as shown
in FIG. 1, with the stud 30 threaded into the rear end 101 of the
hollow cylindrical body 102. The body 102 has a front flange 103
formed on it which butts up against the wall 6 while the body
portion 102 passes through the wall opening 104 to the rear side. A
front mounting plate 106 is threaded at 107 around the edge of the
front flange 103 to hold the plate 106 in place. An inner sleeve
108 fits into the hollow body 102 and has an outwardly formed
flange 109 around its front end which rests against the front of
flange 103. A shoulder 110 on plate 106 clamps the outer end of
flange 109 against flange 103 so that all three parts 103, 109 and
106 are assembled into a secure unitary structure against the wall
6.
An operating push button 111 is arranged on the front of the unit
and has its outer edge 112 normally urged by spring 114 against a
shoulder 113 formed around the edge of the plate 106. The spring
114 extends between the bottom of push button 111 and the flange
109. Slidable within the hollow sleeve 108 is an operating plunger
115 together with an O-ring seal 116 around it for preventing
leakage outward through the push button 111 and through the sleeve
108. The gasket seal 127 prevents leakage outward between the
sleeve 109 and body 102. The left hand end 117 of plunger 115 is
arranged in close proximity to the rear side of push button 111
while the opposite end is provided with a washer type valve member
or seal 118. A restoring spring 119 normally urges the plunger 115
forward and seal 118 into closing contact with valve seat 120
formed around the plunger 115.
Valve seat 120 is held in position on a shoulder 121 formed on the
end of sleeve 108 adjacent the ports 122 and 123 arranged on
opposite sides of the sleeve 108. An inner chamber 124 is located
in the body 102 in to which the inlet tube connection 125 leads,
the end of the tube being sweat soldered to the body 102. The
outlet tube 126 leads into port 122 and is also sweat soldered to
the end of body 102 as shown.
The supply pressure from the tube 125 is present in chamber 124 and
it will be apparent that when the push button 111 is operated
plunger 115 is pushed inward to move the valve member 118 from its
seat 120 thereby permitting water flow to take place from tubing
125, chamber 124, ports 123 and 122 and into tubing 126, to cause
the operation of the flush valve as before.
The advantages of this structure is that the parts 111, 108, 115,
can be made cheaply from suitable plastic materials, while it is
preferable to form the body 102 of brass for sturdiness and to
enable the tubing to be soldered to the connection.
* * * * *