CA1226507A - Automatic shut off valve - Google Patents
Automatic shut off valveInfo
- Publication number
- CA1226507A CA1226507A CA000470358A CA470358A CA1226507A CA 1226507 A CA1226507 A CA 1226507A CA 000470358 A CA000470358 A CA 000470358A CA 470358 A CA470358 A CA 470358A CA 1226507 A CA1226507 A CA 1226507A
- Authority
- CA
- Canada
- Prior art keywords
- valve
- inlet
- outlet
- user
- main
- 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
Landscapes
- Indication Of The Valve Opening Or Closing Status (AREA)
Abstract
Abstract of the Disclosure An automatic shut off valve comprising a housing having a main inlet, an outlet, a user inlet and a user outlet.
A valve assembly is contained within the housing and is movable between an open and a closed position. In its open position, the user inlet and outlet are fluidly connected in series with the main inlet and main outlet while, conversely, in its closed position, the valve assembly sealingly closes and isolates both the user inlet and outlet from the main inlet and main outlet.
A compression spring urges the valve assembly towards its closed position while a fluid flow rate greater than a pre-determined amount. into the user inlet retains the valve assembly in its open position. Consequently, in the event of an interruption or blockage of the fluid flow between the user inlet and outlet, the compression spring snaps the valve assembly to its closed position thus isolating the inlet and outlet from the main inlet and terminating fluid flow through the shut off valve. In the preferred form of the invention, a flow indicator provides an exteriorly visible indication of the flow rate through the shut off valve.
A valve assembly is contained within the housing and is movable between an open and a closed position. In its open position, the user inlet and outlet are fluidly connected in series with the main inlet and main outlet while, conversely, in its closed position, the valve assembly sealingly closes and isolates both the user inlet and outlet from the main inlet and main outlet.
A compression spring urges the valve assembly towards its closed position while a fluid flow rate greater than a pre-determined amount. into the user inlet retains the valve assembly in its open position. Consequently, in the event of an interruption or blockage of the fluid flow between the user inlet and outlet, the compression spring snaps the valve assembly to its closed position thus isolating the inlet and outlet from the main inlet and terminating fluid flow through the shut off valve. In the preferred form of the invention, a flow indicator provides an exteriorly visible indication of the flow rate through the shut off valve.
Description
I
The present invention relates generally to valves and, more particularly, to an automatic shut off valve responsive to fluid flow rate through a portion of the valve.
There are a number of previously known shut off valves which are responsive to a line condition, for example the fluid pressure or fluid flow rate, which automatically close in the event of a particular line condition. These previously known devices, however, have been generally bulky and expensive in con struction and not wholly effective in operation.
The present invention provides an automatic shut off valve which overcomes the above mentioned disadvantages of the previously known devices.
In brief, the present invention is an automatic shut off valve comprising: a housing having a main inlet, a main outlet, a user inlet and a user outlet, first fluid passage means for fluidly connecting said main inlet to said user outlet, said first fluid passage means having a first port at a midpoint, second fluid passage means for fluidly connecting said user in-let to said main outlet, said second fluid passage means having a second port at a midpoint, said first and second ports being coaxial and axially spaced from each other, valve means movable between an open and closed position for simultaneously opening and closing said ports in said first and second fluid passage means, said valve means comprising an elongated valve stem ox-tending axially between said ports and axially slid ably mounted to said housing, a first valve member attached at one end of the valve stem for closing said first port when said valve means is in said closed position, and a second valve member attached at the other end of said valve stem for closing said second port when said valve means is in said closed position, means o'er resiliently urgirl~J said valve means towards its loosed piston;
means or moving said valve means to it's open position no :~L2~5~
means responsive to a fluid flow rate through said second fluid passage means greater than a predetermined amount for retaining said valve means in said open position. Thus, in the open post-lion of the valve means, fluid flows into the main inlet, to the user outlet returns to the user inlet and thereafter exits from the main outlet.
The valve assembly is urged towards its closed post-lion by a compression spring but a fluid flow greater than a pro-determined amount into the housing from the user inlet engages a reaction surface on the valve assembly and retains the valve assembly in its open position. Thus, in the event of a line break or excessive line clogging between the user inlet and out-let, the fluid flow rate into the housing from the user inlet falls below the predetermined flow rate whereupon the compress soon spring automatically moves the valve assembly to its closed position. In doing so the user inlet and outlet are isolated from the main inlet and outlet and, simultaneously, the valve assembly blocks further fluid flow into the main inlet.
In the preferred form of the invention, a flow indict-ion is mechanically coupled to the valve assembly and provides an exteriorly visible signal of the fluid flow rate through the automatic shut off valve.
A hotter understanding of the present invention will be had upon reference to the Eollowinc3 detailed description when read in conjunction with the accompanying drawing, wherein like reference characters refer to like parts throughout the several views, and in which:
Figure 1 it a longitudinal sectional view illustratincJ
a preferred embodiment of the automatic shut off valve of the present inventiorl and with the valve in its closed position;
Figure 2 is a sectional view similclr to Phyla I hut illustrating the bypass valve in its open position;
No. 3 FIG.' 3 is a view waken substantially along line 3-3 in FIG. 1 and with parts removed .-for clarity and FIG. 4 is a view taken substantially along arrow 4 in FIG. 3 and with parts removed for clarity.
De~iled-Description of the Preferrer Embodiment of -the Present Invention With reference iris row FIG. 1, a preferred embody-mint of eke automatic shut of valve of the present invention is -the reshown and comprises a housing 10 having a top wall 12, a bottom wall 14 and a -tubular cylindrical side wall 16. The top wall 12 and bottom wall 14 are secured to opposite ends of the side wall 16 in any conventional fashion and seal mom-biers 18 are provided between the top and bottom walls 12 and 14 and the side walls 16.
A -transversely extending housing partition 19 divides the housing into a first or lower housing chamber 20 and a second or upper housing chamber 22. The upper housing chamber 22 further includes a lower portion 24 and an upper portion 26 : which are fluidly connected together by an axially extending port 28 formed in the housing.
A main inlet 32 is formed in the housing side wall 16 and open -to the tower housing chamber 20. This main inlet 32 is fluidly connected by a line 34 -to a pressurized source 36 of fluid. Similarly, a main outlet 38 is also formed in the housing side wall 16 and open to the upper portion 26 of the upper housing chamber 22. The main outlet 38 is connected by a fluid line 40 to a low pressure fluid source 42, such as a reservoir.
Still referring to FIG. I a User inlet 44 issue formed in the housing side wall 16 and open to the lower portion 24 ox the upper Hussein chamber 22. A user outlet 46 I formed in the houslrlg bottom wall 14 and luckily connected by a No. 4 passageway 48 via an axially extending portion 50 co -the lower housing chamber I A fluid handling device 52, such a a cooler, is fluidly connecter in series between the user outlet 46 and user inlet 44~
With reference now particularly to FIX. 2, a valve assembly 54 includes a first valve member 56 and a second valve member 58 which are axially aligned with each other and carried by a valve stem 60. The valve stem 60 is axially slid ably mounted -through a bore 62 formed in the housing partition 19 while fluid seals 64 around the valve stem 60 prevent fluid leakage along the housing Gore 62.
Still referring to FIG. 1, the first valve member 56 is axially slid ably mounted to the valve stem 60 while a retainer clip 66 limits the downward most position of the firs valve member 56 with respect to the stem 60. A compression spring US is en-trapped between a retainer clip 70 on -the stem 60 and -the top of the first Allah 56 thus urging the first valve member 56 toward the lower retainer clip 66 for a reason -co be subsequently described Still referring to FIG. 2, the upper valve member 58 is secured to the upper end of -the valve stem 60 in any con-ventional fashion. The upper or second valve member 58 includes a lower cylindrical portion which fits within and sealingly engages the port I An upper enlarged diameter portion 72 of the second valve 58 abuts against -the housing lo around the port 28 to limit the downward Moe men of the second valve member 58 and thus of the valve stem 60.
The valve assembly 60 it movable between an open potion, illustrated in I 2 and a closed position,, illu~tratefl in FIG. l end a compression spring urge; Ike valve assembly 60 towarclc.J its closed position In I C9 classic position, the first valve member 56 covers ho axially extend-No. 5 in portion 50 of -the passage 4g and thus prevents any fluid flow from the lower housing chamber 20 and -to the passage-way 48. Simultaneously the second valve member 58 closes the housing port I and thus prevents fluid flow between the lower 5 and upper portions 24 and 26 of the upper housing chamber 22.
Consequently, with the valve assembly 60 in its closed position, the user inlet 44 and outlet 46 are fluidly isolated from the main inlet 32 and main outlet 38 and the first valve member So blocks further fluid flow into eke housing chamber 23 from lo eke main inlet 32 In addition, the compression spring 68 ensures positive seating ox -the first valve member 56 a~ainsc the housing bottom wall 14 thus positively closing the fluid passageway 48.
Conversely, with the valve in its open position, as shown in FIG. 2, the valve assembly 60 shifts upwardly against the force of the compression spring 71. In doing so/ the first valve member 56 opens -the fluid passageway 48 to the housing chamber thus permitting fluid flow from to main inlet 32 and to the user owlet 46. Simultaneously, the second valve member 58 uncovers the housing port 28 and establishes fluid flow from the user inlet 44, through -the upper housing chamber 22 through the port 28 and to the main outlet 38.
Assuming that the fluid flow through the fluid handling device 32 is greater than a predetermined amount, the fluid flow into the user inlet 44 impinges upon a bottom sun-face 74 of the second valve member So and Ryan the valve assembly 60 in its open position against the o'er of the sprint 71. Consequently, the bottom surface 74 of the second valve meter 58 forms a Ryan surface which it respollsive to the wow rat into the htusin~ from the user inlayer I
Consequently, vie the fluid flow through the fluid handling device 52 is in~errupce~ or fall below a predetermined level, .
as could occur by excessive clogging and the fluid handling device, the compression spring 71 fortes. the valve assembly I
to its closed position (FIG 1) -chum isolating -the user inlet I and outlet 46 from eke main inlet I and main outlet 38 and simultaneously preventing further fluid flow from the pressurized fluid source 36 and inn the lower housing chamber 20.
Wick reference now particularly to FIG. 2, since the valve assembly 60 is normally urged to its closed position by the compression spring 71, i-t is necessary to move the valve member 60 to its open position in order to initiate operation of the automatic shut off valve of the present invention. In the preferred form of the invention) the means for initially moving the valve assembly -to its open position comprises a restricted bypass port 80 formed in the housing partition 19 and extending between the lower housing chamber 20 and the lower portion 24 of the upper housing chamber 22. A bypass valve assembly 82 having a valve stem 84 with a diametrically extend-in ~hroughbore 86 is rotatable mounted to the housing side wall 16 by a packing assembly 88. The valve stem 84 is manually rotatable by a handle 90 between an open position, in which the diametric bore 86 registers with -the passageway 80, at a closed position in which the diametric bore I it no aligned with the passageway 80.
In order -to initiate operation of the automatic shut off valve, the bypass valve assembly 82 is first rutted to its open position whereupon pressurized fluid from the lower housing chamber 20 passes through the passageway 80 and into the lower portion 24 of the upper housing chamber 22~ continued fluid OWE from the pressurized fluid source 36 and to the lower portion 24 of the upper housing chamber 22 shifts the valve assembly 60 upwardly against the force of -the compre~ion spring 71 thus moving the valve assembly to its open position.
No. 7 In doing so, fluid flow is established -through the fluid' handling device 52 in eye closured fashion Once the valve assembly has been moved to its open positions the bypass valve assembly 82 is moved to its closed position and the continued fluid slow -through -the fluid handling device 52 maintains the -valve assembly 60 in its open position in the previously described fashion.
I-c will be understood, of course, -that other means may alternatively be employed -to initially move -the valve assembly 60 to its open position without deviation from the spirit or scope of the invention For example, a plunger or other device could be alternatively employed to mechanically move the valve assembly to its open position in order to initiate fluid flow through the automatic shut off valve.
With reference now to FIGS. 3 and 4, in the preferred form ox the invention, the automatic shut off valve includes means 100 for indicating the fluid flow rate Thor the shut off valve. The indicator means 100 comprises a shaft 102 rotatable mounted -to and extending generally radially outwardly from the housing 10. A radially outwardly extending lever 104 is secured to one end 106 of the shaft 102 abuts against the top surface 108 of the fist valve member 56. Thus, upward movement of toe valve assumably 60 and thus of the first valve member 56, rotates the shaft 102 via -the lever 104.
Still referring to JIGS. 3 anal I an indicator needle 110 is secured to the other end 112 of tic ha 102 so that -the indicator needle 110 ends generally radially with respect to the axis ox -the shaft 102. The tree end of the needle 110 cooperates with an indicia plate 1;14 secured to an indicator hying 116 Jo that the pushes of the indicator needle 110 with respect to thy indic.La plate 11~ indicative of the rotational petunia of the aye 2 Audi tub indicative No. 8 of -the position of the valve assembly I In addition a biasing assembly 118 resiliently urges -eke level 10~ against the top surface 10~ of the firs-t valve member 56 AssurLling thee the valve assembly 60 is in its open position and that fluid flow is establishes through the fluid handling device, an increase of the fluid flow rate through the automatic shut off valve urges -eke valve assembly Go to a more upwardly spaced position in order to accommodate the increased fluid flow. This upward movement of the valve assembly 60 is 10 transmitted through the lever 10~ and shaft 102 to the indicator needle 110 thus indicating an increased fluid flow on the indicia plate 114. Conversely, a reduction in the fluid flow rate through the handling device 52 allows the valve assembly to shift downwardly somewhat from the force ox the compression 15 spring 71 -thus rotating the shaft 102 via the lever 104 in the opposite direction. The needle 110 rotates to indicate a ~:~ reduced fluid flow rate through -the fluid handling device 52 and thus -through the automatic shut off valve.
From the foregoing, it can be seen that the device I; 20 of the present invention provides an automatic shut of valve either alone or in combination with an indicator means which is both simple and inexpensive in construction and yet wholly effective in operation.
Having described my invention, however, many modify-cations thereto will become apparent to those skilled in thwart to which it pertains without deviation from the spirit of the invention as defined by the scope of the appended claims.
I claim:
I: :
The present invention relates generally to valves and, more particularly, to an automatic shut off valve responsive to fluid flow rate through a portion of the valve.
There are a number of previously known shut off valves which are responsive to a line condition, for example the fluid pressure or fluid flow rate, which automatically close in the event of a particular line condition. These previously known devices, however, have been generally bulky and expensive in con struction and not wholly effective in operation.
The present invention provides an automatic shut off valve which overcomes the above mentioned disadvantages of the previously known devices.
In brief, the present invention is an automatic shut off valve comprising: a housing having a main inlet, a main outlet, a user inlet and a user outlet, first fluid passage means for fluidly connecting said main inlet to said user outlet, said first fluid passage means having a first port at a midpoint, second fluid passage means for fluidly connecting said user in-let to said main outlet, said second fluid passage means having a second port at a midpoint, said first and second ports being coaxial and axially spaced from each other, valve means movable between an open and closed position for simultaneously opening and closing said ports in said first and second fluid passage means, said valve means comprising an elongated valve stem ox-tending axially between said ports and axially slid ably mounted to said housing, a first valve member attached at one end of the valve stem for closing said first port when said valve means is in said closed position, and a second valve member attached at the other end of said valve stem for closing said second port when said valve means is in said closed position, means o'er resiliently urgirl~J said valve means towards its loosed piston;
means or moving said valve means to it's open position no :~L2~5~
means responsive to a fluid flow rate through said second fluid passage means greater than a predetermined amount for retaining said valve means in said open position. Thus, in the open post-lion of the valve means, fluid flows into the main inlet, to the user outlet returns to the user inlet and thereafter exits from the main outlet.
The valve assembly is urged towards its closed post-lion by a compression spring but a fluid flow greater than a pro-determined amount into the housing from the user inlet engages a reaction surface on the valve assembly and retains the valve assembly in its open position. Thus, in the event of a line break or excessive line clogging between the user inlet and out-let, the fluid flow rate into the housing from the user inlet falls below the predetermined flow rate whereupon the compress soon spring automatically moves the valve assembly to its closed position. In doing so the user inlet and outlet are isolated from the main inlet and outlet and, simultaneously, the valve assembly blocks further fluid flow into the main inlet.
In the preferred form of the invention, a flow indict-ion is mechanically coupled to the valve assembly and provides an exteriorly visible signal of the fluid flow rate through the automatic shut off valve.
A hotter understanding of the present invention will be had upon reference to the Eollowinc3 detailed description when read in conjunction with the accompanying drawing, wherein like reference characters refer to like parts throughout the several views, and in which:
Figure 1 it a longitudinal sectional view illustratincJ
a preferred embodiment of the automatic shut off valve of the present inventiorl and with the valve in its closed position;
Figure 2 is a sectional view similclr to Phyla I hut illustrating the bypass valve in its open position;
No. 3 FIG.' 3 is a view waken substantially along line 3-3 in FIG. 1 and with parts removed .-for clarity and FIG. 4 is a view taken substantially along arrow 4 in FIG. 3 and with parts removed for clarity.
De~iled-Description of the Preferrer Embodiment of -the Present Invention With reference iris row FIG. 1, a preferred embody-mint of eke automatic shut of valve of the present invention is -the reshown and comprises a housing 10 having a top wall 12, a bottom wall 14 and a -tubular cylindrical side wall 16. The top wall 12 and bottom wall 14 are secured to opposite ends of the side wall 16 in any conventional fashion and seal mom-biers 18 are provided between the top and bottom walls 12 and 14 and the side walls 16.
A -transversely extending housing partition 19 divides the housing into a first or lower housing chamber 20 and a second or upper housing chamber 22. The upper housing chamber 22 further includes a lower portion 24 and an upper portion 26 : which are fluidly connected together by an axially extending port 28 formed in the housing.
A main inlet 32 is formed in the housing side wall 16 and open -to the tower housing chamber 20. This main inlet 32 is fluidly connected by a line 34 -to a pressurized source 36 of fluid. Similarly, a main outlet 38 is also formed in the housing side wall 16 and open to the upper portion 26 of the upper housing chamber 22. The main outlet 38 is connected by a fluid line 40 to a low pressure fluid source 42, such as a reservoir.
Still referring to FIG. I a User inlet 44 issue formed in the housing side wall 16 and open to the lower portion 24 ox the upper Hussein chamber 22. A user outlet 46 I formed in the houslrlg bottom wall 14 and luckily connected by a No. 4 passageway 48 via an axially extending portion 50 co -the lower housing chamber I A fluid handling device 52, such a a cooler, is fluidly connecter in series between the user outlet 46 and user inlet 44~
With reference now particularly to FIX. 2, a valve assembly 54 includes a first valve member 56 and a second valve member 58 which are axially aligned with each other and carried by a valve stem 60. The valve stem 60 is axially slid ably mounted -through a bore 62 formed in the housing partition 19 while fluid seals 64 around the valve stem 60 prevent fluid leakage along the housing Gore 62.
Still referring to FIG. 1, the first valve member 56 is axially slid ably mounted to the valve stem 60 while a retainer clip 66 limits the downward most position of the firs valve member 56 with respect to the stem 60. A compression spring US is en-trapped between a retainer clip 70 on -the stem 60 and -the top of the first Allah 56 thus urging the first valve member 56 toward the lower retainer clip 66 for a reason -co be subsequently described Still referring to FIG. 2, the upper valve member 58 is secured to the upper end of -the valve stem 60 in any con-ventional fashion. The upper or second valve member 58 includes a lower cylindrical portion which fits within and sealingly engages the port I An upper enlarged diameter portion 72 of the second valve 58 abuts against -the housing lo around the port 28 to limit the downward Moe men of the second valve member 58 and thus of the valve stem 60.
The valve assembly 60 it movable between an open potion, illustrated in I 2 and a closed position,, illu~tratefl in FIG. l end a compression spring urge; Ike valve assembly 60 towarclc.J its closed position In I C9 classic position, the first valve member 56 covers ho axially extend-No. 5 in portion 50 of -the passage 4g and thus prevents any fluid flow from the lower housing chamber 20 and -to the passage-way 48. Simultaneously the second valve member 58 closes the housing port I and thus prevents fluid flow between the lower 5 and upper portions 24 and 26 of the upper housing chamber 22.
Consequently, with the valve assembly 60 in its closed position, the user inlet 44 and outlet 46 are fluidly isolated from the main inlet 32 and main outlet 38 and the first valve member So blocks further fluid flow into eke housing chamber 23 from lo eke main inlet 32 In addition, the compression spring 68 ensures positive seating ox -the first valve member 56 a~ainsc the housing bottom wall 14 thus positively closing the fluid passageway 48.
Conversely, with the valve in its open position, as shown in FIG. 2, the valve assembly 60 shifts upwardly against the force of the compression spring 71. In doing so/ the first valve member 56 opens -the fluid passageway 48 to the housing chamber thus permitting fluid flow from to main inlet 32 and to the user owlet 46. Simultaneously, the second valve member 58 uncovers the housing port 28 and establishes fluid flow from the user inlet 44, through -the upper housing chamber 22 through the port 28 and to the main outlet 38.
Assuming that the fluid flow through the fluid handling device 32 is greater than a predetermined amount, the fluid flow into the user inlet 44 impinges upon a bottom sun-face 74 of the second valve member So and Ryan the valve assembly 60 in its open position against the o'er of the sprint 71. Consequently, the bottom surface 74 of the second valve meter 58 forms a Ryan surface which it respollsive to the wow rat into the htusin~ from the user inlayer I
Consequently, vie the fluid flow through the fluid handling device 52 is in~errupce~ or fall below a predetermined level, .
as could occur by excessive clogging and the fluid handling device, the compression spring 71 fortes. the valve assembly I
to its closed position (FIG 1) -chum isolating -the user inlet I and outlet 46 from eke main inlet I and main outlet 38 and simultaneously preventing further fluid flow from the pressurized fluid source 36 and inn the lower housing chamber 20.
Wick reference now particularly to FIG. 2, since the valve assembly 60 is normally urged to its closed position by the compression spring 71, i-t is necessary to move the valve member 60 to its open position in order to initiate operation of the automatic shut off valve of the present invention. In the preferred form of the invention) the means for initially moving the valve assembly -to its open position comprises a restricted bypass port 80 formed in the housing partition 19 and extending between the lower housing chamber 20 and the lower portion 24 of the upper housing chamber 22. A bypass valve assembly 82 having a valve stem 84 with a diametrically extend-in ~hroughbore 86 is rotatable mounted to the housing side wall 16 by a packing assembly 88. The valve stem 84 is manually rotatable by a handle 90 between an open position, in which the diametric bore 86 registers with -the passageway 80, at a closed position in which the diametric bore I it no aligned with the passageway 80.
In order -to initiate operation of the automatic shut off valve, the bypass valve assembly 82 is first rutted to its open position whereupon pressurized fluid from the lower housing chamber 20 passes through the passageway 80 and into the lower portion 24 of the upper housing chamber 22~ continued fluid OWE from the pressurized fluid source 36 and to the lower portion 24 of the upper housing chamber 22 shifts the valve assembly 60 upwardly against the force of -the compre~ion spring 71 thus moving the valve assembly to its open position.
No. 7 In doing so, fluid flow is established -through the fluid' handling device 52 in eye closured fashion Once the valve assembly has been moved to its open positions the bypass valve assembly 82 is moved to its closed position and the continued fluid slow -through -the fluid handling device 52 maintains the -valve assembly 60 in its open position in the previously described fashion.
I-c will be understood, of course, -that other means may alternatively be employed -to initially move -the valve assembly 60 to its open position without deviation from the spirit or scope of the invention For example, a plunger or other device could be alternatively employed to mechanically move the valve assembly to its open position in order to initiate fluid flow through the automatic shut off valve.
With reference now to FIGS. 3 and 4, in the preferred form ox the invention, the automatic shut off valve includes means 100 for indicating the fluid flow rate Thor the shut off valve. The indicator means 100 comprises a shaft 102 rotatable mounted -to and extending generally radially outwardly from the housing 10. A radially outwardly extending lever 104 is secured to one end 106 of the shaft 102 abuts against the top surface 108 of the fist valve member 56. Thus, upward movement of toe valve assumably 60 and thus of the first valve member 56, rotates the shaft 102 via -the lever 104.
Still referring to JIGS. 3 anal I an indicator needle 110 is secured to the other end 112 of tic ha 102 so that -the indicator needle 110 ends generally radially with respect to the axis ox -the shaft 102. The tree end of the needle 110 cooperates with an indicia plate 1;14 secured to an indicator hying 116 Jo that the pushes of the indicator needle 110 with respect to thy indic.La plate 11~ indicative of the rotational petunia of the aye 2 Audi tub indicative No. 8 of -the position of the valve assembly I In addition a biasing assembly 118 resiliently urges -eke level 10~ against the top surface 10~ of the firs-t valve member 56 AssurLling thee the valve assembly 60 is in its open position and that fluid flow is establishes through the fluid handling device, an increase of the fluid flow rate through the automatic shut off valve urges -eke valve assembly Go to a more upwardly spaced position in order to accommodate the increased fluid flow. This upward movement of the valve assembly 60 is 10 transmitted through the lever 10~ and shaft 102 to the indicator needle 110 thus indicating an increased fluid flow on the indicia plate 114. Conversely, a reduction in the fluid flow rate through the handling device 52 allows the valve assembly to shift downwardly somewhat from the force ox the compression 15 spring 71 -thus rotating the shaft 102 via the lever 104 in the opposite direction. The needle 110 rotates to indicate a ~:~ reduced fluid flow rate through -the fluid handling device 52 and thus -through the automatic shut off valve.
From the foregoing, it can be seen that the device I; 20 of the present invention provides an automatic shut of valve either alone or in combination with an indicator means which is both simple and inexpensive in construction and yet wholly effective in operation.
Having described my invention, however, many modify-cations thereto will become apparent to those skilled in thwart to which it pertains without deviation from the spirit of the invention as defined by the scope of the appended claims.
I claim:
I: :
Claims (5)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. An automatic shut off valve comprising:
a housing having a main inlet, a main outlet r a user inlet and a user outlet, first fluid passage means for fluidly connecting said main inlet to said user outlet, said first fluid passage means having a first port at a midpoint, second fluid passage means for fluidly connecting said second fluid passage means for fluidly connecting said user inlet to said main outlet, said second fluid passage means having a second port at a midpoint, said first and second ports being coaxial and axially spaced from each other, valve means movable between an open and closed posi-tion for simultaneously opening and closing said ports in said first and second fluid passage means, said valve means comprising an elongated valve stem extending axially between said ports and axially slidably mount-ed to said housing, a first valve member attached at one end of the valve stem for closing said first port when said valve means is in said closed position, and a second valve member attached at the other end of said valve stem for closing said second port when said valve means is in said closed position, means fox resiliently urging said valve means towards its closed position, means for moving said valve means to its open position, and means responsive to 2 fluid flow rate through said second fluid passage means greater than a predetermined amount for retaining said valve means in said open position.
a housing having a main inlet, a main outlet r a user inlet and a user outlet, first fluid passage means for fluidly connecting said main inlet to said user outlet, said first fluid passage means having a first port at a midpoint, second fluid passage means for fluidly connecting said second fluid passage means for fluidly connecting said user inlet to said main outlet, said second fluid passage means having a second port at a midpoint, said first and second ports being coaxial and axially spaced from each other, valve means movable between an open and closed posi-tion for simultaneously opening and closing said ports in said first and second fluid passage means, said valve means comprising an elongated valve stem extending axially between said ports and axially slidably mount-ed to said housing, a first valve member attached at one end of the valve stem for closing said first port when said valve means is in said closed position, and a second valve member attached at the other end of said valve stem for closing said second port when said valve means is in said closed position, means fox resiliently urging said valve means towards its closed position, means for moving said valve means to its open position, and means responsive to 2 fluid flow rate through said second fluid passage means greater than a predetermined amount for retaining said valve means in said open position.
2. The invention as defined in claim 1 wherein said moving means comprises means for selectively fluidly connecting said main inlet to said user inlet.
3. The invention as defined in claim 1 wherein said moving means comprises a normally closed bypass valve fluidly connected between said main inlet and said user inlet and means accessible exteriorly of said housing for opening said bypass valve.
4. The invention as defined in claim 1 and comprising means for slidably mounting said first valve member to said stem and resilient means for urging said first valve member with respect to said stem towards its closed position.
5. The invention as defined in claim 1 wherein said retaining means comprises a flow reaction surface on said second valve member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000470358A CA1226507A (en) | 1984-12-18 | 1984-12-18 | Automatic shut off valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000470358A CA1226507A (en) | 1984-12-18 | 1984-12-18 | Automatic shut off valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1226507A true CA1226507A (en) | 1987-09-08 |
Family
ID=4129398
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000470358A Expired CA1226507A (en) | 1984-12-18 | 1984-12-18 | Automatic shut off valve |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1226507A (en) |
-
1984
- 1984-12-18 CA CA000470358A patent/CA1226507A/en not_active Expired
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4535797A (en) | Automatic shut off valve | |
| US6942192B2 (en) | Gate valve with flow-through gate | |
| US5899434A (en) | Flow rate control valve | |
| US4574836A (en) | Bypass valve with indicator | |
| CA1055465A (en) | Valve with self-actuating fluid seal | |
| EP1354159A1 (en) | Sprinkler alarm test and drainage device for fire protection systems | |
| CA1226507A (en) | Automatic shut off valve | |
| GB2159406A (en) | Dry pipe valve accelerator | |
| US5365974A (en) | Flow-control valve | |
| US4622994A (en) | Fluid handling device | |
| US5655748A (en) | Metering valve | |
| EP0597732B1 (en) | Vacuum pump with inlet oil-controlled valve | |
| US5348269A (en) | Inline pneumatic/mechanical flow control valve system | |
| US5004004A (en) | Automatic drain valve | |
| EP0154641A1 (en) | Fluid handling device | |
| KR880002081B1 (en) | Condensate discharging apparatus | |
| GB2340917A (en) | Valve with metal to metal sealing | |
| CA1250272A (en) | Self-closing valve | |
| US6109289A (en) | Drain valve | |
| US4359797A (en) | Plug and ball injector valve | |
| RU2274842C2 (en) | Method and device for maintaining pressure of liquid in certain volume | |
| US4548235A (en) | Fluid handling device | |
| CA1210303A (en) | Conduit-break valves for a pressure conduit or hose with a surrounding protective conduit or hose | |
| JP3450021B2 (en) | Hydraulic switch | |
| CA1045091A (en) | Automatic nozzle assembly |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |