CA1140420A - Check valve - Google Patents
Check valveInfo
- Publication number
- CA1140420A CA1140420A CA000341375A CA341375A CA1140420A CA 1140420 A CA1140420 A CA 1140420A CA 000341375 A CA000341375 A CA 000341375A CA 341375 A CA341375 A CA 341375A CA 1140420 A CA1140420 A CA 1140420A
- Authority
- CA
- Canada
- Prior art keywords
- valve
- closure member
- mounting
- chamber
- valve body
- 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
- F16K15/03—Check valves with guided rigid valve members with a hinged closure member or with a pivoted closure member
Abstract
ABSTRACT OF THE DISCLOSURE
An improved check valve is disclosed which has only a small top opening and avoids the use of a pivot pin.
The valve has a valve body with a chamber therein, an inlet in the valve body to the chamber and an outlet in the valve body from the chamber. A valve seat is provided on the inlet in the chamber, a valve closure member within the chamber for seating on the valve seat to close the inlet, and means for mounting the closure member above the valve seat so it can move with both linear and curvilinear move-ment away from the valve seat to open the inlet.
An improved check valve is disclosed which has only a small top opening and avoids the use of a pivot pin.
The valve has a valve body with a chamber therein, an inlet in the valve body to the chamber and an outlet in the valve body from the chamber. A valve seat is provided on the inlet in the chamber, a valve closure member within the chamber for seating on the valve seat to close the inlet, and means for mounting the closure member above the valve seat so it can move with both linear and curvilinear move-ment away from the valve seat to open the inlet.
Description
This invention relates to an improved check valve~
Check valves are well known. Generally they comprise a valve body having an inlet and an outlet with a valve closure member pivotably mounted within the valve. The valve is usually mounted in a line with the inlet and outlet aligned horizontally although some check valves are designed to have the inlet and outlet aligned at any angle between the horizontal and vertical. The closure member is adapted to seat on a valve seat within the valve body to close the inlet preventing reverse flow through the valve in the direction from the outlet to the inlet. The pivot for the closure member lS usually located above the valve seat.
The closure member can swing about the pivo-t, away from the valve seat, to open the inlet, allowing flow through the valve from the inlet to the outlet. Examples of check valves of the above general type are shown in the following U.S. patents: 79,527;
846,317; 849,466; 922,262; 3,075,547; 3,144,045; 3,366,137 and 4,039,004.
The known che~k valves have several disadvantages however. The majority of the known valves have a top opening in the valve body for inserting the closure member into the valve from the top of the valve. Patents 79,527; 846,317 and 3,144,045 are representative of such valves. Such an opening however must be large enough to allow the valve closure member to be inserted.
Thus a large closure cap is needed for the top opening. The cap and supporting boss in the valve body increase the weight of the valve and add to its manufacturing cost.
Many of the known check valves also employ pivot pins to pivotably mount the closure member above the valve seat.
Patents 3,075,547 and 3,366,137 are representative of such valves.
The use of pivot pins however generally requires another drilling operation in the housing for insertion of a pivot pin. Another machining operation increases the cost of assembly.
L2(~
All known check valves are made so that the valve closure members are mounted solely for pivoting movement toward or away from the valve seat This makes it difficult to properly seat the valve closure member on the valve seat since an exact fit, and an exact mounting, is required. Close tolerances must be employed in the manufacture of the valve to provide the necessary fit, and no simple adjustment can be made to compen-sate for wear. In some cases resilient seats are provided to assist in compensating for manufacturing tolerances.
It is a purpose of the present invention to provide an improved check valve which provides good seating of the valve closure member on the valve seat without the requirement of low manufacturing tolerances or a resilient seat and which mini-mi2es wear affecting the seat.
It is another purpose of thle present invention to pro-vide an improved check valve in which the valve closure member can be inserted through the outlet of the valve body without re-quiring a large top opening, thereby reducing weight and cost of tha valve.
In accordance with the present invention, the improved check valve is providad with a simple valve closure member mount-ing whereby the valve closure member is merely suspended from support means and loosely retained on the support means by a small vertical restraining pin. The closure member pivots on the support means, about the vertical restraining pin, to open the valve. When the vertical pin is raised from a slot in the valve closure member, the valve closure member can be easily moved off the support means and removed from the valve body through the outlet of the valve.
The slot in the valve closure member for receiving the restraining pin is elongated and positioned therein so that when the valve closure member is seated on the valve face in the valve the pin is not located at either end of the slot. This permits the valve closure member to move both linearly and curvilinearly when opening or closing the inlet and thus permits good seating of the valve closure member on the valve seat, wnile at the same time accommodating wear.
The invention is particularly directed toward a check valve having a valve body defining a chamber therein, an inlet in the valve body to the chamber and an outlet in the valve body from the chamber. The inlet has a valve seat in the chamber and a valve closure member is provided within the chamber for seat-ing on the valve seat to close the inlet. Means are provided for mounting the closure member above the valve seat so it can move with both linear and curvilinear movement away from the valve seat to open the inlet.
In a preferred embodiment, the means for mounting the closure member includes mounting surfaces within the valve body above the valve seat, and mounting members on a top portion of the valve closure member. The valve closure member is suspended by the mounting members from the mounting surfaces. A slot is provided in the top portion of the valve closure member, and a removable restraining pin extends down from the valve body into the slot adapted to retain the valve closure member on the mount-ing surfaces.
The invention will now be described in detail having reference to the accompanying drawings in which:
Fig. 1 is a side elevational view of one embodiment of the check valve according to the present invention.
Fig. 2 is an end elevational view of the check valve shown in Fig. 1 from the outlet side.
Fig. 3 is an eDd elevational view of tho check valve shown in Fig. 1 from the inlet side.
Fig. 4 is a longitudinal cross-sectional view of the check valve shown in Fig. l.
Fig. 5 is a cross-sectional view taken along line 5-5 of Fig. 4.
Fig. 6 is a cross-sectional view taken along line 6-6 Of Fig. 4.
Fig. 7 is a perspec-tive view of the valve closure member and restraining pin, and Fig. 8 is a cross-sectional view of the support of the valve closure member taken along line 8-8 of Fig. 6.
The check valve of the present invention has a valve body lO defining an interior chamber ll. An inlet 12 leads into the chamber 11 from one side of the valve body lO and an outlet 13 leads out of the chamber 11 from the other side of the valve body 10. The inlet 12 and outlet 13 are axially aligned along a longitudinal axis and both have interior pipe threads 14. In the embodiment shown the inlet 12 and outlet 13 have the same diameters. The inlet 12 has a circular valve seat 15 where it enters the chamber 11. The valve seat 15 is in a substantially perpendicular plane to the longitudinal axis o~ the inlet 12 and outlet 13.
A valve closure member 16 is mounted within the chamber ll. The closure member 16 has a main support plate 17, and a closure disc 18. The closure disc 18 is fastened at its center by a pin 20 to the lower end of the bottom portion of the support plate 17. The center pin 20 is a sliding fit in a hole in the support plate 17 to provide some axial movement between the disc 18 and the support plate 17. The closure disc 18 has a circular seating face 21, opposite support plate 17 which rests against valve seat 15 to close the inlet 12.
The valve closure member 16 is mounted within the chamber 11 above the valve seat 15 so that it can move with both linear and curvilinear movement away from the valve seat 15 ~ :~4~
to open the inle~ 12. The mounting means include a pair o~ flat, spaced apart support surfaces 22, 23 above the valve seat 15 within the chamber 11 as shown in Figs. 4 and 5. The support surfaces 22, 23 are spaced apart and extend substantially hori-zontally and perpendicular to the direction of flow through the valveO The support surfaces 22, 23 are formed by a pair of shoulders 24, extending inwardly into chamber 11 formed inte-grally with the side walls of the valve body 10 above the valve seat 15. The upper surfaces of the shoulders 24, form the flat support surfaces 22, 23. The valve body 10 has thickened por-tions 25 up-stream of the flat support surfaces 22, ~3 to essentially eliminate the twisting action of the closure member 16 resting on the support surfaces 22, 23.
The main support plate 17 of the valve closure member 16 is suspended from the support surfaces 22, 23. The top portion 26 o~ support plate 17 is extended at an angle to the lower portion of the support plate 17 terminating in a flat cross-bar plate 27. The cross-bar plate 27 has mounting members in the ~orm of flat pivot arms 28, 29 extending from each side to form a continuation of flat cross-bar 27. As may be seen in Figs. 7 and 8, the top portion 26 joins the flat cross bar plate 27 at its approximate center by means of a notch cut in the cross bar plate 27. The flat pivot arms 2~, 29 are less than half the width of the cross bar plate 27 extending on the notched side of the piate 27. The flat pivot arms 28, 29 rest on top of support surfaces 22J 23 respectively to suspend the closure member 16 therefrom. The angle at which the top portion 26 of support plate 17 extands is such as to generally locate face 21 of disc 18 on the valve seat 15 beneath pivot arms 28, 29.
The main support plate 17 is retained on the support surfaces 22, 23 by a restraining pin 30 which fits into a slot 31 formed in the upper portion 26 of support plate 17. The pin ~.~.9,U4~
30 projects down into the chamber from one end of a bolt 32 which has a lower portion 32A larger in diameter than the re-straining pin 30 to restrain the closure member 16 from rising up, thus causing the disc 18 to seat above the valve seat and not seal. The lower portion 32A also may in one embodiment act as a stop so that when the closure member 16 is pivoted to the open position, the top portion 26 comes to rest against the edge of the lower portion 32A instead of the center pin 20 resting against the inside surface of the valve body 10 as shown in Fig.
4. The bolt 32 is screwed into a threaded bore 33 formed in a boss 34 at the top of the valve body 10 above shoulders 24.
When the bolt 32 is screwed into bore 33 the pin 30 projects down into chamber 11 between shoulders 24, 25 and into the slot 31. The slot 31 e~tends in the top portion 26 of the support plate 17 in ths longitudinal direction of the valve, perpendicu-lar to the valve seat 15, and has rounded ends. The slot 31 extends generally from where the top portion 26 of support plate 17 meets the cross-bar 27 to about half-way down the length of the top portion 26. The top rounded end of the slot 31 is generally perpendicular to the flat surface of the cross-bar 27 and the lower end is generally perpendicular to the flat surface of the top portion 26 as shown in Fig. 8. The top rounded end of slot 31 is generally aligned with the upstream sides 35, 36 of the pivot arms 28, 29. The bottom edges of these sides 35, 36 form the pivot line for the valve closure member 16 as will be described.
Assembly of the valve is very simple. With the bolt 32 removed, the valve closure member 16 is simply inserted into the chamber 11 through outlet 13. The closure member 16 is hung by its pivot arms 28, 29 from the top of shoulders 22, 23 with disc 18 seated against valve seat 15. Bolt 32 is then screwed into bore 33 to locate its pin 30 loosely within slot O
31. When the check valve is closed, with disc 18 ~lush against seat 15, the pin 30 is located within slot 31 spaced a short distance away from the top end o~ the slot 31.
When the valve is to be opened, the closure member 16 slides a short distance along -the support surfaces 22, 23 to-ward the outlet 13 until the top end-of the slot 31 abuts pin 30. Pin 30 then initiates pivoting of the closure member, on -its continued movement, about the pivot line at the bottom edges of pivot arm sides 35, 36 on the support surfaces 22, 23.
Thus the valve closure member 16 has both linear and curvilinear movement when it opens and closes. This motion provides excellent seating of the valve while accommodating generous tolerances in fit in mounting the closure member. In addition, the elongated slot 31 accommodates for some wear between the valve seat 15 and disc face 21. Axial movement also occurs when the center pin 20 supporting the disc 18 slides in the hole in the support plate 17. Thus there are provided two provisions fo~ axial movement ~or the disc 18.
Locating the sides 35, 36 of the pivot arms 28, 29 in general alignment with the top rounded end of the slot 31 mini-mizes wear on pin 30 as the valve closure member 16 pivots about the bottom edges o~ the arms 28, 29 while restrained from further linear movement by the pin 30.
The cross-bar plate 27 is sized to fit loosely between the shoulders 2~, as the closure member 16 pivots. The sides of the cross-bar plate 27 are slightly tapered to facilitate movement between the shoulders 24. The cross-bar plate 27 helps maintain the closure member 16 centered during pivoting movement.
In another embodiment, the closure member need not use narrow pivot arms 28, 29. Instead, the cross bar plate can be rectanguiar without -the two pivot arms. The closure member then pivots on the back edge of the cross bar plate This con-figuration is suitable for valves having only infrequent usebecause wear occurs as the rounded end of the slot of the support plate moves up the pin. In the configuration shown, there is little or no sliding movement between the support plate and the pin, so wear does not become a problem.
Check valves are well known. Generally they comprise a valve body having an inlet and an outlet with a valve closure member pivotably mounted within the valve. The valve is usually mounted in a line with the inlet and outlet aligned horizontally although some check valves are designed to have the inlet and outlet aligned at any angle between the horizontal and vertical. The closure member is adapted to seat on a valve seat within the valve body to close the inlet preventing reverse flow through the valve in the direction from the outlet to the inlet. The pivot for the closure member lS usually located above the valve seat.
The closure member can swing about the pivo-t, away from the valve seat, to open the inlet, allowing flow through the valve from the inlet to the outlet. Examples of check valves of the above general type are shown in the following U.S. patents: 79,527;
846,317; 849,466; 922,262; 3,075,547; 3,144,045; 3,366,137 and 4,039,004.
The known che~k valves have several disadvantages however. The majority of the known valves have a top opening in the valve body for inserting the closure member into the valve from the top of the valve. Patents 79,527; 846,317 and 3,144,045 are representative of such valves. Such an opening however must be large enough to allow the valve closure member to be inserted.
Thus a large closure cap is needed for the top opening. The cap and supporting boss in the valve body increase the weight of the valve and add to its manufacturing cost.
Many of the known check valves also employ pivot pins to pivotably mount the closure member above the valve seat.
Patents 3,075,547 and 3,366,137 are representative of such valves.
The use of pivot pins however generally requires another drilling operation in the housing for insertion of a pivot pin. Another machining operation increases the cost of assembly.
L2(~
All known check valves are made so that the valve closure members are mounted solely for pivoting movement toward or away from the valve seat This makes it difficult to properly seat the valve closure member on the valve seat since an exact fit, and an exact mounting, is required. Close tolerances must be employed in the manufacture of the valve to provide the necessary fit, and no simple adjustment can be made to compen-sate for wear. In some cases resilient seats are provided to assist in compensating for manufacturing tolerances.
It is a purpose of the present invention to provide an improved check valve which provides good seating of the valve closure member on the valve seat without the requirement of low manufacturing tolerances or a resilient seat and which mini-mi2es wear affecting the seat.
It is another purpose of thle present invention to pro-vide an improved check valve in which the valve closure member can be inserted through the outlet of the valve body without re-quiring a large top opening, thereby reducing weight and cost of tha valve.
In accordance with the present invention, the improved check valve is providad with a simple valve closure member mount-ing whereby the valve closure member is merely suspended from support means and loosely retained on the support means by a small vertical restraining pin. The closure member pivots on the support means, about the vertical restraining pin, to open the valve. When the vertical pin is raised from a slot in the valve closure member, the valve closure member can be easily moved off the support means and removed from the valve body through the outlet of the valve.
The slot in the valve closure member for receiving the restraining pin is elongated and positioned therein so that when the valve closure member is seated on the valve face in the valve the pin is not located at either end of the slot. This permits the valve closure member to move both linearly and curvilinearly when opening or closing the inlet and thus permits good seating of the valve closure member on the valve seat, wnile at the same time accommodating wear.
The invention is particularly directed toward a check valve having a valve body defining a chamber therein, an inlet in the valve body to the chamber and an outlet in the valve body from the chamber. The inlet has a valve seat in the chamber and a valve closure member is provided within the chamber for seat-ing on the valve seat to close the inlet. Means are provided for mounting the closure member above the valve seat so it can move with both linear and curvilinear movement away from the valve seat to open the inlet.
In a preferred embodiment, the means for mounting the closure member includes mounting surfaces within the valve body above the valve seat, and mounting members on a top portion of the valve closure member. The valve closure member is suspended by the mounting members from the mounting surfaces. A slot is provided in the top portion of the valve closure member, and a removable restraining pin extends down from the valve body into the slot adapted to retain the valve closure member on the mount-ing surfaces.
The invention will now be described in detail having reference to the accompanying drawings in which:
Fig. 1 is a side elevational view of one embodiment of the check valve according to the present invention.
Fig. 2 is an end elevational view of the check valve shown in Fig. 1 from the outlet side.
Fig. 3 is an eDd elevational view of tho check valve shown in Fig. 1 from the inlet side.
Fig. 4 is a longitudinal cross-sectional view of the check valve shown in Fig. l.
Fig. 5 is a cross-sectional view taken along line 5-5 of Fig. 4.
Fig. 6 is a cross-sectional view taken along line 6-6 Of Fig. 4.
Fig. 7 is a perspec-tive view of the valve closure member and restraining pin, and Fig. 8 is a cross-sectional view of the support of the valve closure member taken along line 8-8 of Fig. 6.
The check valve of the present invention has a valve body lO defining an interior chamber ll. An inlet 12 leads into the chamber 11 from one side of the valve body lO and an outlet 13 leads out of the chamber 11 from the other side of the valve body 10. The inlet 12 and outlet 13 are axially aligned along a longitudinal axis and both have interior pipe threads 14. In the embodiment shown the inlet 12 and outlet 13 have the same diameters. The inlet 12 has a circular valve seat 15 where it enters the chamber 11. The valve seat 15 is in a substantially perpendicular plane to the longitudinal axis o~ the inlet 12 and outlet 13.
A valve closure member 16 is mounted within the chamber ll. The closure member 16 has a main support plate 17, and a closure disc 18. The closure disc 18 is fastened at its center by a pin 20 to the lower end of the bottom portion of the support plate 17. The center pin 20 is a sliding fit in a hole in the support plate 17 to provide some axial movement between the disc 18 and the support plate 17. The closure disc 18 has a circular seating face 21, opposite support plate 17 which rests against valve seat 15 to close the inlet 12.
The valve closure member 16 is mounted within the chamber 11 above the valve seat 15 so that it can move with both linear and curvilinear movement away from the valve seat 15 ~ :~4~
to open the inle~ 12. The mounting means include a pair o~ flat, spaced apart support surfaces 22, 23 above the valve seat 15 within the chamber 11 as shown in Figs. 4 and 5. The support surfaces 22, 23 are spaced apart and extend substantially hori-zontally and perpendicular to the direction of flow through the valveO The support surfaces 22, 23 are formed by a pair of shoulders 24, extending inwardly into chamber 11 formed inte-grally with the side walls of the valve body 10 above the valve seat 15. The upper surfaces of the shoulders 24, form the flat support surfaces 22, 23. The valve body 10 has thickened por-tions 25 up-stream of the flat support surfaces 22, ~3 to essentially eliminate the twisting action of the closure member 16 resting on the support surfaces 22, 23.
The main support plate 17 of the valve closure member 16 is suspended from the support surfaces 22, 23. The top portion 26 o~ support plate 17 is extended at an angle to the lower portion of the support plate 17 terminating in a flat cross-bar plate 27. The cross-bar plate 27 has mounting members in the ~orm of flat pivot arms 28, 29 extending from each side to form a continuation of flat cross-bar 27. As may be seen in Figs. 7 and 8, the top portion 26 joins the flat cross bar plate 27 at its approximate center by means of a notch cut in the cross bar plate 27. The flat pivot arms 2~, 29 are less than half the width of the cross bar plate 27 extending on the notched side of the piate 27. The flat pivot arms 28, 29 rest on top of support surfaces 22J 23 respectively to suspend the closure member 16 therefrom. The angle at which the top portion 26 of support plate 17 extands is such as to generally locate face 21 of disc 18 on the valve seat 15 beneath pivot arms 28, 29.
The main support plate 17 is retained on the support surfaces 22, 23 by a restraining pin 30 which fits into a slot 31 formed in the upper portion 26 of support plate 17. The pin ~.~.9,U4~
30 projects down into the chamber from one end of a bolt 32 which has a lower portion 32A larger in diameter than the re-straining pin 30 to restrain the closure member 16 from rising up, thus causing the disc 18 to seat above the valve seat and not seal. The lower portion 32A also may in one embodiment act as a stop so that when the closure member 16 is pivoted to the open position, the top portion 26 comes to rest against the edge of the lower portion 32A instead of the center pin 20 resting against the inside surface of the valve body 10 as shown in Fig.
4. The bolt 32 is screwed into a threaded bore 33 formed in a boss 34 at the top of the valve body 10 above shoulders 24.
When the bolt 32 is screwed into bore 33 the pin 30 projects down into chamber 11 between shoulders 24, 25 and into the slot 31. The slot 31 e~tends in the top portion 26 of the support plate 17 in ths longitudinal direction of the valve, perpendicu-lar to the valve seat 15, and has rounded ends. The slot 31 extends generally from where the top portion 26 of support plate 17 meets the cross-bar 27 to about half-way down the length of the top portion 26. The top rounded end of the slot 31 is generally perpendicular to the flat surface of the cross-bar 27 and the lower end is generally perpendicular to the flat surface of the top portion 26 as shown in Fig. 8. The top rounded end of slot 31 is generally aligned with the upstream sides 35, 36 of the pivot arms 28, 29. The bottom edges of these sides 35, 36 form the pivot line for the valve closure member 16 as will be described.
Assembly of the valve is very simple. With the bolt 32 removed, the valve closure member 16 is simply inserted into the chamber 11 through outlet 13. The closure member 16 is hung by its pivot arms 28, 29 from the top of shoulders 22, 23 with disc 18 seated against valve seat 15. Bolt 32 is then screwed into bore 33 to locate its pin 30 loosely within slot O
31. When the check valve is closed, with disc 18 ~lush against seat 15, the pin 30 is located within slot 31 spaced a short distance away from the top end o~ the slot 31.
When the valve is to be opened, the closure member 16 slides a short distance along -the support surfaces 22, 23 to-ward the outlet 13 until the top end-of the slot 31 abuts pin 30. Pin 30 then initiates pivoting of the closure member, on -its continued movement, about the pivot line at the bottom edges of pivot arm sides 35, 36 on the support surfaces 22, 23.
Thus the valve closure member 16 has both linear and curvilinear movement when it opens and closes. This motion provides excellent seating of the valve while accommodating generous tolerances in fit in mounting the closure member. In addition, the elongated slot 31 accommodates for some wear between the valve seat 15 and disc face 21. Axial movement also occurs when the center pin 20 supporting the disc 18 slides in the hole in the support plate 17. Thus there are provided two provisions fo~ axial movement ~or the disc 18.
Locating the sides 35, 36 of the pivot arms 28, 29 in general alignment with the top rounded end of the slot 31 mini-mizes wear on pin 30 as the valve closure member 16 pivots about the bottom edges o~ the arms 28, 29 while restrained from further linear movement by the pin 30.
The cross-bar plate 27 is sized to fit loosely between the shoulders 2~, as the closure member 16 pivots. The sides of the cross-bar plate 27 are slightly tapered to facilitate movement between the shoulders 24. The cross-bar plate 27 helps maintain the closure member 16 centered during pivoting movement.
In another embodiment, the closure member need not use narrow pivot arms 28, 29. Instead, the cross bar plate can be rectanguiar without -the two pivot arms. The closure member then pivots on the back edge of the cross bar plate This con-figuration is suitable for valves having only infrequent usebecause wear occurs as the rounded end of the slot of the support plate moves up the pin. In the configuration shown, there is little or no sliding movement between the support plate and the pin, so wear does not become a problem.
Claims (14)
1. A check valve comprising, a valve body defining a chamber therein, an inlet in the valve body to the chamber and an outlet in the valve body from the chamber, aligned along a longitudinal axis, a valve seat on the inlet in the chamber, a valve closure member within the chamber having a disc for seating on the valve seat, and including on a top portion two flat mounting arms extending in opposite directions from a central plate, and a slot in the top portion located between the two mounting arms and extending in a direction substantially parallel to the longitudinal axis of the valve body, means for mounting the closure member including two spaced apart flat mounting surfaces forming part of the valve body, located in the valve body above the valve seat, the two mounting surfaces, one on each side of the longitudinal axis, being in the same plane and substantially perpendicular to the valve seat, the two mounting surfaces supporting the two mounting arms of the valve closure member so it can move freely with both linear and curvilinear movement away from the valve seat to open the inlet, and a restraining pin within the chamber attached to a removable portion positioned at the top of the valve body above the valve seat, the pin projecting down into the slot in the valve closure member to retain the two mounting arms of the valve closure member on the two mounting surfaces, the pin initiating swinging movement of the closure member during opening.
2. The check valve as claimed in claim 1 wherein the inlet and outlet are aligned along a longitudinal axis, the valve seat extending substantially perpendicular to the longitudinal axis, and the means for mounting the closure member includes two spaced apart flat mounting surfaces for the valve closure member above the valve seat within the chamber, the two mount-ing surfaces lying in the same plane substantially perpendi-cular to the valve seat.
3. The check valve as claimed in claim 2 wherein the means for mounting the closure member includes two flat mount-ing arms on a top portion of the valve closure member, extend-ing in opposite directions from a central plate, the valve closure member suspended by the two mounting arms from the two mounting surfaces, and slidable therealong, with the two mount-ing arms extending generally perpendicular to the longitudinal axis of the valve body.
4. The check valve as claimed in claim 1 wherein the restraining pin is attached to a bolt which is removably mounted in an opening in the top of the valve body.
5. The check valve as claimed in claim 1 wherein the valve closure member is sized to be inserted into the chamber through the outlet opening, to be suspended from the two mount-ing surfaces.
6. The check valve as claimed in claim 3 wherein the mounting surfaces are formed by shoulders extending inwardly into the chamber from the sides of the valve body, and the central plate on the top end of the valve closure fits loosely between the shoulders when the valve closure member pivots to loosely center the closure member.
7. The check valve as claimed in claim 1 wherein the means for mounting the closure member includes mounting surfaces within the valve body above the valve seat, mounting members on a top portion of the valve closure member suspended by the mounting members from the mounting surfaces, a slot in the top portion of the valve closure member, and a removable restraining pin extending down from the valve body into the slot adapted to retain the valve closure member on the mounting surfaces.
8. The check valve as claimed in claim 7 wherein the pin fits into the slot intermediate the ends of the slot when the valve is closed.
9. The check valve as claimed in claim 8 wherein the mounting surfaces are flat and extend generally perpendicular to the plane of the valve seat.
10. The check valve as claimed in claim 8 wherein the valve closure member has a size permitting its insertion into the chamber through the outlet in the valve body.
11. The check valve as claimed in claim 8 wherein the pin is attached to a bolt which is detachably mounted in an opening in the top of the valve body.
12. The check valve as claimed in claim 9 wherein the two mounting members comprise flat, laterally extending arms, the upstream side of the arms aligned with the upstream end of the slot in the valve closure member.
13. The check valve as claimed in claim 12 wherein the upstream side of the arms is in substantially the same plane as the valve seal on the inlet in the valve body.
14. The check valve as claimed in claim 1 wherein the two mounting arms have sharp edges representing pivot edges when the closure member swings to open or close the valve.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000341375A CA1140420A (en) | 1979-12-06 | 1979-12-06 | Check valve |
| GB8032715A GB2064721B (en) | 1979-12-06 | 1980-10-10 | Check valve |
| ES497307A ES497307A0 (en) | 1979-12-06 | 1980-11-29 | IMPROVEMENTS IN THE CHECK VALVES |
| JP17032180A JPS6048670B2 (en) | 1979-12-06 | 1980-12-04 | non-return valve |
| NL8006643A NL8006643A (en) | 1979-12-06 | 1980-12-05 | CHECK VALVE. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000341375A CA1140420A (en) | 1979-12-06 | 1979-12-06 | Check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1140420A true CA1140420A (en) | 1983-02-01 |
Family
ID=4115766
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000341375A Expired CA1140420A (en) | 1979-12-06 | 1979-12-06 | Check valve |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPS6048670B2 (en) |
| CA (1) | CA1140420A (en) |
| ES (1) | ES497307A0 (en) |
| GB (1) | GB2064721B (en) |
| NL (1) | NL8006643A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2505967B1 (en) * | 1981-05-12 | 1985-07-12 | Moizieux Ets Metallurg | MOUNTING AND ARTICULATION DEVICE IN ITS SUPPORT OF A BLOCKING DEVICE IN OSCILLATORY MOVEMENTS IN PIPES, PARTICULARLY FOR THE FLOW OF FLUIDS IN ONE SENSE |
| GB8429200D0 (en) * | 1984-11-19 | 1984-12-27 | Page R G | Check valve |
| JP3181630B2 (en) * | 1991-06-26 | 2001-07-03 | 本田技研工業株式会社 | Fuel injection device |
| EP2986876B1 (en) * | 2013-04-19 | 2020-07-29 | Rico-Sicherheitstechnik AG | Explosion-proof valve |
-
1979
- 1979-12-06 CA CA000341375A patent/CA1140420A/en not_active Expired
-
1980
- 1980-10-10 GB GB8032715A patent/GB2064721B/en not_active Expired
- 1980-11-29 ES ES497307A patent/ES497307A0/en active Granted
- 1980-12-04 JP JP17032180A patent/JPS6048670B2/en not_active Expired
- 1980-12-05 NL NL8006643A patent/NL8006643A/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| NL8006643A (en) | 1981-07-01 |
| GB2064721A (en) | 1981-06-17 |
| JPS56127866A (en) | 1981-10-06 |
| GB2064721B (en) | 1983-12-14 |
| ES8201709A1 (en) | 1982-01-16 |
| JPS6048670B2 (en) | 1985-10-29 |
| ES497307A0 (en) | 1982-01-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |