CA1107601A - Stop check float control valve - Google Patents
Stop check float control valveInfo
- Publication number
- CA1107601A CA1107601A CA312,552A CA312552A CA1107601A CA 1107601 A CA1107601 A CA 1107601A CA 312552 A CA312552 A CA 312552A CA 1107601 A CA1107601 A CA 1107601A
- Authority
- CA
- Canada
- Prior art keywords
- valve
- chamber
- main conduit
- spherical
- fluid
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
- F16K15/04—Check valves with guided rigid valve members shaped as balls
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Check Valves (AREA)
Abstract
Abstract of the Disclosure A valve assembly adapted to regulate the flow rate of a fluid to be transferred therethrough and to automatically prevent the fluid from flowing backward when such a backflow occurs thereby working as both regular valve and check valve.
The assembly includes a main conduit having a valve seat, and a valve retaining means which is located downstream from the valve seat; a chamber extending from the main conduit at a point adjacent to the valve seat and valve retaining means and being fluidly in communication with the main conduit; a spherical valve being cooperable with the valve seat; valve manipulating means operably and sealingly protruding from the chamber and adapted to control the relative location of the spherical valve to the valve seat, the spherical valve having such a size and specific gravity that the spherical valve does not obstruct the normal flow of the fluid through the main conduit when the valve manipulating means is set in such a manner as to allow the spherical valve to be confined to the chamber; and the valve retaining means being adapted to enable the valve manipulating means to control the relative location of the spherical valve to the valve seat.
The assembly includes a main conduit having a valve seat, and a valve retaining means which is located downstream from the valve seat; a chamber extending from the main conduit at a point adjacent to the valve seat and valve retaining means and being fluidly in communication with the main conduit; a spherical valve being cooperable with the valve seat; valve manipulating means operably and sealingly protruding from the chamber and adapted to control the relative location of the spherical valve to the valve seat, the spherical valve having such a size and specific gravity that the spherical valve does not obstruct the normal flow of the fluid through the main conduit when the valve manipulating means is set in such a manner as to allow the spherical valve to be confined to the chamber; and the valve retaining means being adapted to enable the valve manipulating means to control the relative location of the spherical valve to the valve seat.
Description
7~
The present invention relates to a valve assembly, and more particularly, to a valve assembly which is adapted to regulate the flow rate of a fluid to be transferred therethrough and to automatically prevent the fluid from flowing backward thereby working as both a regular valve and a check valve.
Among conventional valve assemblies, there are flow-rate controlling valves and so-called check valves which function to prevent back-flows of fluids. For example, Canadian patent 880,172 issued September 7, 1971 to Jorge C. F. Zakka discloses a valve assembly. This v~lve assembly is characterized by a one piece cage for guiding a spherical valve along the internal guide. The cage is of a generally cylindrical shape with an open end through which the valve stem protrudes and a closed end, and an internal groove near the open end of the cage such that the spherical valve can be held in place in the cage by placing a retention ring in the groove. Therefore, the spherical valve is integral with the valve stem. This valve assembly can be used to regulate the flow rate of a fluid to be transferred therethrough.
As examples of so-called check valves, there are U.S. Patents 841,474 issued January 15, 1907 to E. F. Wendelken;
1,700,234 issued January 29, 1929 to McCrosky; 3,105,516 issued October 1, 1963 to B. H. Werra et al. The check valves dis-closed in these patents are characterized by a branch cylinder which is obtuse to the longitudinal axis of the main flow path and is fluidly in communication with the main conduit.
A spherical valve is kept within the branch cylinder when the fluid flows toward a predetermined direction. However, once the pressure of the fluid is reduced to a certain level, then the spherical valve automatically moves to a valve seat formed on the inner wall of the main conduit, by its own weight. The spherical valve also functions by any back-flow of the fluid.
U.S. Patent 304,736 issued September 9, 1884 to F. W. Kelly discloses another type of check valve assembly.
In the assembly of the Kelly patent, a pipe is bent into the form of a water trap. A valve seat is provided with the pipe at the top of the water trap. The pipe above the valve seat is enlarged into a chamber and closed by an end cap. A second pipe is connected to the lower part of the enlarged chamber.
The enlarged chamber contains a spherical valve made of rubber or any suitable material. A fluid normally flows from the pipe to the second pipe through the chamber. The sperical valve is generally kept in the upper part of the enlarged chamber, by the flowing-in water. However, when the flow of the fluid is reduced beyond a certain level or the fluid starts flowing back, the spherical valve rests on the valve seat thereby preventing s~ch back-flow.
U.S. Patent 2,415,875 issued February 18, 1947 to A. A. Greenwald illustrates in the sole drawing thereof a flushing tank inlet valve assembly. There are two valves in the valve assembly. The lower valve is a check valve and is of a rubber ball. The check valve cooperates with its corresponding valve seat in order to prevent any backflow of water. The upper valve is integral with a float via a valve stem. The second valve cooperates with its respective valve seat to stop the flow of water when the flush tank is full, as the float lifts the second valve toward its respective valve seat as water rises in the tank.
However, these prior art valves function o~ly in one way, i.e., as a flow rate controlling valve or a check valve except for U.S. Patent 2,415,875. The valve assembly 176~1 of U.S. Patent 2,415,875 works in both ways, but it includes two separate valves. The present invention provides a valve assembly which works as both flow rate controlling valve and check valve and which includes only one valve. Such a valve assembly is simple in construction and therefore inexpensive to manufacture and less troublesome in use.
In one aspect of this invention there is provided~
a valve assembly adapted to regulate the flow rate of a fluid to be transferred therethrough and to automatically prevent the fluid from flowing backward when such a backflow occurs thereby working as both regular valve and check valve, comprising:
a main conduit having a valve seat, and a valve retaining means which is located downstream from the valve seat; a chamber extending from the main conduit at a point adjacent to the valve seat and valve retaining means and being fluidly in communication with the main conduit; a spherical valve being cooperable with the valve seat; valve manipulating means operably and sealingly protruding from the chamber and adapted to control the relative location of the spherical valve to the valve seat, said spherical valve having such a size and specific gravity that the spherical valve does not obstruct the normal flow of the fluid through the main conduit when the valve manipulating means is set in such a manner as to allow the spherical valve to be confined to the chamber; and the valve retaining means being adapted to enable the valve manipulating means to control the relative location of the spherical valve to the valve seat. The fluid may be liquid.
In another aspect of this invention there is provided such a valve assembly as described in the immediately proceding paragraph wherein the main conduit is straight and the longitudinal axis of the chamber is obtuse to the straight `
longitudinal axis of the main conduit.
The present invention will be further appreciated by reading the following description in conjunction with the accompanying drawing which is a cross-sectional view of a preferred embodiment of a valve assembly according to the present invention.
The valve assembly consists of a straight main conduit 1 and a branch chamber 2. The main conduit 1 may be bent for example, by 90 degree or by 18Q degree as seen in Fig. 1 of U.S. Patent 304,736. The main conduit 1 is provided with a circular valve seat 3 and a peg ~ which serves as a spherical valve guide and retaining means. The branch chamber is formed of a cylinder 5 which is threaded at the free end ~ thereof. The branch chamber may be made of a polygonal, for example, hexagonal cylinder. An end cap 7 having threaded outer and inner walls is screwed in the cylinder 5. Through the inner bore of the end cap 7 which bore is defined by the threaded inner wall, a valve stem 11 extends outwardly and terminates in a turning wheel 12. The outer surface of the valve stem 11 is threaded so that it can be sealingly rotated within the bore of the end cap 7. In the drawing, there is a fluid flow moving toward the right hand side. Thus, the spherical valve 13 is kept within the space within the branch chamber. Accordingly, the flow is not obstructed by the spherical valYe 13.
The valve assembly can be used to regulate the flow rate of the fluid by turning the wheel 12 to push the spherical valve 13 into the main conduit 1 in order to obstruct the flow in the main conduit 1. The sphexical valve 13 is kept in place by the provision of the peg 4. The -,~,. ..
,j .
~gP76~
location of the peg 4 must be decided in such a way that the spherical valve 13 is guided to circle or to return into the branch chamber when the flow rate of the fluid exceeds a certain level. If the wheel 12 is further turned the spherical valve 13 is urged against the valve seat 3 thereby completely closing the main conduit to stop the flow of the fluid. When the valve stem 8 is raised by turning the wheel lZ to the opposite direction, the spherical valve 13 follows the valve stem 8 thus increasing the flow rate. The spherical valve 13 is preferably made of a yieldable material which provides better sealing performance between the valve seat 3 and the spherical valve 13.
In the drawing, if the flow rate of the fluid is ; reduced, the spherical valve 13 moves back onto the valve seat 3 by its own gravity~ If a negative pressure occurs at the inlet side of the main conduit 1, then the spherical valve 13 is sucked onto the valve seat 3 thereby pEeventing back-flow of the fluid.
The material, relative size and location of each element of the valve assembly according to this invention as well as the specific gravity of the spherical valve will be determined, depending on fluid to be transferred there-through and fluid pressure range to be employed.
"i ~
The present invention relates to a valve assembly, and more particularly, to a valve assembly which is adapted to regulate the flow rate of a fluid to be transferred therethrough and to automatically prevent the fluid from flowing backward thereby working as both a regular valve and a check valve.
Among conventional valve assemblies, there are flow-rate controlling valves and so-called check valves which function to prevent back-flows of fluids. For example, Canadian patent 880,172 issued September 7, 1971 to Jorge C. F. Zakka discloses a valve assembly. This v~lve assembly is characterized by a one piece cage for guiding a spherical valve along the internal guide. The cage is of a generally cylindrical shape with an open end through which the valve stem protrudes and a closed end, and an internal groove near the open end of the cage such that the spherical valve can be held in place in the cage by placing a retention ring in the groove. Therefore, the spherical valve is integral with the valve stem. This valve assembly can be used to regulate the flow rate of a fluid to be transferred therethrough.
As examples of so-called check valves, there are U.S. Patents 841,474 issued January 15, 1907 to E. F. Wendelken;
1,700,234 issued January 29, 1929 to McCrosky; 3,105,516 issued October 1, 1963 to B. H. Werra et al. The check valves dis-closed in these patents are characterized by a branch cylinder which is obtuse to the longitudinal axis of the main flow path and is fluidly in communication with the main conduit.
A spherical valve is kept within the branch cylinder when the fluid flows toward a predetermined direction. However, once the pressure of the fluid is reduced to a certain level, then the spherical valve automatically moves to a valve seat formed on the inner wall of the main conduit, by its own weight. The spherical valve also functions by any back-flow of the fluid.
U.S. Patent 304,736 issued September 9, 1884 to F. W. Kelly discloses another type of check valve assembly.
In the assembly of the Kelly patent, a pipe is bent into the form of a water trap. A valve seat is provided with the pipe at the top of the water trap. The pipe above the valve seat is enlarged into a chamber and closed by an end cap. A second pipe is connected to the lower part of the enlarged chamber.
The enlarged chamber contains a spherical valve made of rubber or any suitable material. A fluid normally flows from the pipe to the second pipe through the chamber. The sperical valve is generally kept in the upper part of the enlarged chamber, by the flowing-in water. However, when the flow of the fluid is reduced beyond a certain level or the fluid starts flowing back, the spherical valve rests on the valve seat thereby preventing s~ch back-flow.
U.S. Patent 2,415,875 issued February 18, 1947 to A. A. Greenwald illustrates in the sole drawing thereof a flushing tank inlet valve assembly. There are two valves in the valve assembly. The lower valve is a check valve and is of a rubber ball. The check valve cooperates with its corresponding valve seat in order to prevent any backflow of water. The upper valve is integral with a float via a valve stem. The second valve cooperates with its respective valve seat to stop the flow of water when the flush tank is full, as the float lifts the second valve toward its respective valve seat as water rises in the tank.
However, these prior art valves function o~ly in one way, i.e., as a flow rate controlling valve or a check valve except for U.S. Patent 2,415,875. The valve assembly 176~1 of U.S. Patent 2,415,875 works in both ways, but it includes two separate valves. The present invention provides a valve assembly which works as both flow rate controlling valve and check valve and which includes only one valve. Such a valve assembly is simple in construction and therefore inexpensive to manufacture and less troublesome in use.
In one aspect of this invention there is provided~
a valve assembly adapted to regulate the flow rate of a fluid to be transferred therethrough and to automatically prevent the fluid from flowing backward when such a backflow occurs thereby working as both regular valve and check valve, comprising:
a main conduit having a valve seat, and a valve retaining means which is located downstream from the valve seat; a chamber extending from the main conduit at a point adjacent to the valve seat and valve retaining means and being fluidly in communication with the main conduit; a spherical valve being cooperable with the valve seat; valve manipulating means operably and sealingly protruding from the chamber and adapted to control the relative location of the spherical valve to the valve seat, said spherical valve having such a size and specific gravity that the spherical valve does not obstruct the normal flow of the fluid through the main conduit when the valve manipulating means is set in such a manner as to allow the spherical valve to be confined to the chamber; and the valve retaining means being adapted to enable the valve manipulating means to control the relative location of the spherical valve to the valve seat. The fluid may be liquid.
In another aspect of this invention there is provided such a valve assembly as described in the immediately proceding paragraph wherein the main conduit is straight and the longitudinal axis of the chamber is obtuse to the straight `
longitudinal axis of the main conduit.
The present invention will be further appreciated by reading the following description in conjunction with the accompanying drawing which is a cross-sectional view of a preferred embodiment of a valve assembly according to the present invention.
The valve assembly consists of a straight main conduit 1 and a branch chamber 2. The main conduit 1 may be bent for example, by 90 degree or by 18Q degree as seen in Fig. 1 of U.S. Patent 304,736. The main conduit 1 is provided with a circular valve seat 3 and a peg ~ which serves as a spherical valve guide and retaining means. The branch chamber is formed of a cylinder 5 which is threaded at the free end ~ thereof. The branch chamber may be made of a polygonal, for example, hexagonal cylinder. An end cap 7 having threaded outer and inner walls is screwed in the cylinder 5. Through the inner bore of the end cap 7 which bore is defined by the threaded inner wall, a valve stem 11 extends outwardly and terminates in a turning wheel 12. The outer surface of the valve stem 11 is threaded so that it can be sealingly rotated within the bore of the end cap 7. In the drawing, there is a fluid flow moving toward the right hand side. Thus, the spherical valve 13 is kept within the space within the branch chamber. Accordingly, the flow is not obstructed by the spherical valYe 13.
The valve assembly can be used to regulate the flow rate of the fluid by turning the wheel 12 to push the spherical valve 13 into the main conduit 1 in order to obstruct the flow in the main conduit 1. The sphexical valve 13 is kept in place by the provision of the peg 4. The -,~,. ..
,j .
~gP76~
location of the peg 4 must be decided in such a way that the spherical valve 13 is guided to circle or to return into the branch chamber when the flow rate of the fluid exceeds a certain level. If the wheel 12 is further turned the spherical valve 13 is urged against the valve seat 3 thereby completely closing the main conduit to stop the flow of the fluid. When the valve stem 8 is raised by turning the wheel lZ to the opposite direction, the spherical valve 13 follows the valve stem 8 thus increasing the flow rate. The spherical valve 13 is preferably made of a yieldable material which provides better sealing performance between the valve seat 3 and the spherical valve 13.
In the drawing, if the flow rate of the fluid is ; reduced, the spherical valve 13 moves back onto the valve seat 3 by its own gravity~ If a negative pressure occurs at the inlet side of the main conduit 1, then the spherical valve 13 is sucked onto the valve seat 3 thereby pEeventing back-flow of the fluid.
The material, relative size and location of each element of the valve assembly according to this invention as well as the specific gravity of the spherical valve will be determined, depending on fluid to be transferred there-through and fluid pressure range to be employed.
"i ~
Claims (8)
1. A valve assembly adapted to regulate the flow rate of a fluid to be transferred therethrough and to auto-matically prevent the fluid from flowing backward when such a backflow occurs thereby working as both regular valve and check valve, comprising:
a main conduit having a valve seat, and a valve guiding and retaining means which is located downstream from the valve seat;
a chamber extending from the main conduit at a point adjacent to the valve seat and valve retaining means and being fluidly in communication with the main conduit;
a spherical valve being cooperable with the valve seat;
valve manipulating means operably and sealingly pro-truding from the chamber and adapted to selectively engage the spherical valve to thus control the relative location of the spherical valve to the valve seat, said spherical valve having such a size and specific gravity that the spherical valve does not obstruct the normal flow of the fluid through the main conduit when the valve manipulating means is set in such a manner as to allow the spherical valve to be confined to the chamber; and the valve retaining means being adapted to enable the valve manipulating means to control the relative location of the spherical valve to the valve seat.
a main conduit having a valve seat, and a valve guiding and retaining means which is located downstream from the valve seat;
a chamber extending from the main conduit at a point adjacent to the valve seat and valve retaining means and being fluidly in communication with the main conduit;
a spherical valve being cooperable with the valve seat;
valve manipulating means operably and sealingly pro-truding from the chamber and adapted to selectively engage the spherical valve to thus control the relative location of the spherical valve to the valve seat, said spherical valve having such a size and specific gravity that the spherical valve does not obstruct the normal flow of the fluid through the main conduit when the valve manipulating means is set in such a manner as to allow the spherical valve to be confined to the chamber; and the valve retaining means being adapted to enable the valve manipulating means to control the relative location of the spherical valve to the valve seat.
2. The valve assembly according to Claim 1 wherein the main conduit is straight and the longitudinal axis of the chamber is obtuse to the straight longitudinal axis of the main conduit.
3. The valve assembly according to Claim 1 wherein the valve retaining means is at least one projection inwardly protruding from the main conduit.
4. The valve assembly according to Claim 1 wherein the chamber has a transverse circular cross-section.
5. The valve assembly according to Claim 1 wherein the chamber has a transverse hexagonal cross-section.
6. The valve assembly according to Claim 1 wherein said valve manipulating means comprises a threaded stem which cooperates with a threaded cylindrical wall of the chamber.
7. The valve assembly according to Claim 1 wherein said chamber is formed with a cylindrical portion extending obtuse to the longitudinal axis of the main conduit, said cylindrical portion having a threaded inner wall at and adjacent to the free end thereof, and an end cup which is sealingly threaded in the cylindrical portion thereby forming the chamber.
8. The valve assembly according to Claim 7 wherein the manipulating means comprises a threaded stem which co-operates with a threaded inner wall of the end cup.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA312,552A CA1107601A (en) | 1978-10-03 | 1978-10-03 | Stop check float control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA312,552A CA1107601A (en) | 1978-10-03 | 1978-10-03 | Stop check float control valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1107601A true CA1107601A (en) | 1981-08-25 |
Family
ID=4112513
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA312,552A Expired CA1107601A (en) | 1978-10-03 | 1978-10-03 | Stop check float control valve |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1107601A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0110061A1 (en) * | 1982-10-29 | 1984-06-13 | RACI S.r.l. | Improvements in shut-off and check valves |
| US4667696A (en) * | 1985-04-04 | 1987-05-26 | Rensburg Gert N J Van | Flow valve |
| WO1990014540A1 (en) * | 1989-05-24 | 1990-11-29 | Abs Pumpen Ag | Ball check valve for conduits |
| JP2005098493A (en) * | 2003-08-28 | 2005-04-14 | Kitz Corp | Ball check valve and drainage control device using the same |
| US11125226B2 (en) * | 2011-12-15 | 2021-09-21 | Graco Minnesota Inc. | Adjustable stop for check valve |
-
1978
- 1978-10-03 CA CA312,552A patent/CA1107601A/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0110061A1 (en) * | 1982-10-29 | 1984-06-13 | RACI S.r.l. | Improvements in shut-off and check valves |
| US4667696A (en) * | 1985-04-04 | 1987-05-26 | Rensburg Gert N J Van | Flow valve |
| WO1990014540A1 (en) * | 1989-05-24 | 1990-11-29 | Abs Pumpen Ag | Ball check valve for conduits |
| JP2005098493A (en) * | 2003-08-28 | 2005-04-14 | Kitz Corp | Ball check valve and drainage control device using the same |
| US11125226B2 (en) * | 2011-12-15 | 2021-09-21 | Graco Minnesota Inc. | Adjustable stop for check valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |