CA1212657A - Valve seal - Google Patents
Valve sealInfo
- Publication number
- CA1212657A CA1212657A CA000429244A CA429244A CA1212657A CA 1212657 A CA1212657 A CA 1212657A CA 000429244 A CA000429244 A CA 000429244A CA 429244 A CA429244 A CA 429244A CA 1212657 A CA1212657 A CA 1212657A
- Authority
- CA
- Canada
- Prior art keywords
- cavity
- valve
- wedge
- valve member
- ring
- 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
Abstract
ABSTRACT
TITLE: VALVE SEAL
A valve member for screw down valves or faucets, has a resilient "O" ring 26, 34, trapped in a recess by means of a central wedge, 25, 36, so that the "O" ring is squeezed between the wedge 25, 36, and the side wall 22, 33, of its containing cavity 21, 35, to thereby close off the cavity and securely hold the "O" ring in place. Passage of liquid into the cavity is minimised by the action of the wedge, and the provision of internal securing means 24, 38, so that the wedge is held from within the cavity by a threaded stud, 38, or snap-fit projection, 24, mating with a complementary recess 23, within the wedge.
(Figures 2 and 3)
TITLE: VALVE SEAL
A valve member for screw down valves or faucets, has a resilient "O" ring 26, 34, trapped in a recess by means of a central wedge, 25, 36, so that the "O" ring is squeezed between the wedge 25, 36, and the side wall 22, 33, of its containing cavity 21, 35, to thereby close off the cavity and securely hold the "O" ring in place. Passage of liquid into the cavity is minimised by the action of the wedge, and the provision of internal securing means 24, 38, so that the wedge is held from within the cavity by a threaded stud, 38, or snap-fit projection, 24, mating with a complementary recess 23, within the wedge.
(Figures 2 and 3)
Description
DESCRIPTION
TITLE: VALVE SEAL
.
1 This invention relates to valves, and has particular applicatlon to valve members for use within valves such as faucets, screw down valves and the like, ~or liquids or gases.
Hitherto, valves for fluid control have generally utilised replace-able annular washers of a hard but somewhat resilient material, such as red fibre nylon, rubber or the like, adapted to seal against a ridged valve sea-t. Such washers deteriorate in use, and reguire higher and higher torque to effect a seal, so that the ridged seat cuts into the ~ace o~ the washer. This is a problem encountered with conventional domestic faucets. It is also a problem with larger valves, as valve spanners are often used to exert high torque to close off the valve as the washer deteriorates. This often damages the valve stem threads or valve body, as well as seriously lS damaging the washer~ and often exacerbates the problem.
In seeking to overcome this problem~ many attempts have been made to mount an "0" ring in a cage, to effect a seal.
Examples of such "0" ring seals are shown in the following patents:
U.S.P. 2,417,494, U.S.P. ~,658,716, U.S L P. 2,678,187, U.~.P. 2,89~,718, U.~.P. 2,g71,090~ U.S.P. 3,198,481, U.S.P. 3,612,479, U.S~P 3,996,965, Belglan P.N. 621,664, U.K.P. 884,529.
U.S.P. 2417494 and U.5.P. 2S78187 teach the use of an "0" ring as the main sealing element clamped in the face of a valve member by means of a screw and a clamping member.
Figure 3 o~ the Belgian Patent teaches the use of an "0" ring clamped within a cavity by a conical headed fastener and provides a relief passage 8 between the cavity and the rear of the valve member. In the two U.S. Patents first mentioned~ the "0" ring is allowed to protrude from the sealing face of the valve member. In U.K. Patent 884529, the "0" ring is held within a cavity, of such a size that the "O" ring is maintained within the cavity and does not protrude therefrom. This suffers from the disadvantage that dirt may be trapped within the cavity crea-ting damage to -the "O" ring with consequent risk oE loss o seal SUMMARY OF THE INVENTION
. . .
It is an object of this invention to provide an improved valve me~ber which obviates the disadvantages of the conventional flat washer arrangement.
In one aspect, the invention provides a valve member including a body having a sealing face, a cavity in said sealing face, a toroidal resilient sealing member positioned in said cavity and having a portion protruding from said sealing face, a wedge member adapted to hold said toroidal sealing memberin place, said wedge member being connected to said body by internal securing means, whereby said cavity is closed off by said toroidal sealing means being squeezed between said body and said wedge member.
In the specification, -the expression "internal securing means"
as applied to a valve member means any securing means which is not accessible to the fluid passageway in the valve. Accordingly, it excludes such arrangements as screws or bolts around which the fluid must flow, as in U.S. Patent No. 2,6787187 referred to above, for example, but includes such things as snap-fit or pop-fit arrangements, internally threaded members, frictionally held members, glued or welded members.
Other aspects of this invention, which should be considered in all its novel aspects, will become apparent from the following description which is given by way of example only, with refer-ence to the accompanying drawings, in which:
Figure 1 illustrates a schematic view of a faucet, and a pre-ferred valve member.
Figure 2 is a cross section through a first valve member, having a snap-fit connection between a wedge member and the body of the valve member.
Figure 3 shows an alternative valve member in which the wedge -member has a -threaded blind aperture connected to a threaded spigot protruding through the body of the valve member.
'7 1 ~5Lure 4 illustrates a valve member suitable ~or connection to a valve having a non-rising spindle arrangement.
Figure 5 illustrates an alternative snap-fit connection between the wedge member and body of the valve member.
Turning now to Figure 1, a conventional faucet 10 is illustrated schematically, and contains a valve member 13 in the form of a ~umper, which rests in the end of a vertically movable spindle 14 to thus close off communication between an inlet 11 and an outlet 12. The valve member 13 has a sealing face 15 adapted to seal against a flat seat 16.
Protruding from the sealing face of the valve member is a resilient toroidal sealing member in the form o~ a resilient "0" ring, which is trapped in the valve member. Th~s "0" ring, is held in place by a central wedge member 17 in such a fashion that the "0" ring is squeezed between the psripheral sides of a cavity in the body, and the edge of the wedge member thereby minimising the risk of liquid entering the cavity from the sealing face. The wedge member 17 - is attached to the body of the valve member by internal securing means, for example it may be glued, or welded to the internal face of the cavity within the body in the case of a plastics material, or connected thereto by an appropriate snap-fit ~astener, or threaded fastener as shown in the following drawings.
Figure 2 illustrates a valve member 20 having a cavity 21 w~th an undercut peripheral side wall 22, and a recess 23 adapted to receive a barbed end 24 of a snap-fit wedging member 25. The body of the valve member, and the wedging member are preferably formed of a plastics material e.g, nylon or acetyl, which is sufficiently hard to form a secure cage for a resilient "0" ring 26, but yet on the other hand enables the barbed end o~ the wedge member to snap-fit into the recessed 23.
~2~
1 The wedge member 25 prePerably has sloping sides 28, which slope at approximately 20 to the central axis oF the rearwardly facing splll 30 of the valve member. By this means, a resillent "0" ring 2G
can be held in place within a cavity 21, with the frus$o-conlcal wedge member 25 squeezing the "0" ring against the undercut peri-pheral side wall 22, so tha~ the "0" rlng is squeezed and partly protrudes from the main sealing ~ace 31 of the valve ~ember. By suitably shaping the peripheral side wall, it is possible to leave a relieving portion within the cavity 21 between the "0" ring and the wedge member 25.
Figure 3 shows an alternative arrangement in wh~ch a valve member 32 has a cage 33, and "0" rlng 34 within a cavity 35 in the cage, and held in place by a central wedge member 36. Holding the central wedge member 36 ~n place is a removable spill 379 having a threaded sp~got 38 extending through an aperture 39 in the rear of the cage, and into engagèment with a cQrresponding threaded recess 40 within the wedge member 36. By this means, the spill 37 can be unscrewed ~rom the valve member 36 to replace the "0"
ring if requ7red. In addition, if a different size of spill is required to fit a particular faucet, then the spill can be removed and replaced by a spill of a different diameter, enabling economies to be achieved in stock holding, by forming ~umpers for faucets, having common cages and wedge members, but forming spllls of different diameters, to enable ~umpers of the required dimensions to be assembled when required. For example, different manufact-urers produce ~" standard ~umpers with either ~" or 3/16"
diameter spllls.
The valve member of Figure 3 is preferably formed of metal, such as bronze, monel or st~inless steel, whilst the "0" ring can be formed of a resilient material such as rubber or viton.
Figure 4 shows a valve member 45 having a metal cage 46, a resilient "0" ring 47, and a wedge member 48 formed of a relatively hard plastics material such as nylon or acetyl, _ 5 _ 1 adapted to engage with a barbed spigot 49 o~ a non-rising splndle member 50. By providing the barbed spigot 49 of metal~ it wlll bite into and engage with the plastics wedye 48. Thus the barbed spigot 49 ls of a harder material than the wedge 4a, whilst the wedge 4~ is of a harder material than the resillent "0" ring ~7.
The non-rislng spindle member 40 can be o~ prismatlc shape, e.g.
a hexagon, and adapted to fit within a correspond~ng prismatic recess in a ~aucet body, so that rotation o~ a threaded spindle withln the prismatic member 50 will enable the spindle to rotate without rising, but will a~fect upwards or downwards movement of the prismatic member 50 thereby moving the valve member towards or away from a valve seat.
Flgure 5 illustrates an alternative snap-fit arrangement in which a valve mem~er 54 has a barbed central spigot 55 adapted to inter-engage wlth a corresponding recess 56 within a central wedgingmember 57. The body 58 of the valve member is conveniently formed as a Jumper having a central spill 59, integral therewith, and the body 58 may be formed of metal or plastics with an appropriate recess 60 in the sealing face thereof.
The central wedging member 57 is conveniently formed of a plastics material which is harder than the resilient "0" ring 61, yet is resilient enough to snap over the central barb 55. A suitable material for the wedging member 57 is acetyl or nylon, or other plastics material.
Whilst the valve member of this inventlon can he used with a con-ventional ridged seat, it is preferred that it is used in combina-tion with a ~lat seat. A flat seat is cheaper to produce than a ridged seat. Moreover, the protr~ding nature of the resilient "0"
ring ayainst a ~lat seat~ will tend to minimise underwater shock, when used in marine valves; and will assist in minimising noise of the valve in operation. This is advantageous in naval use, where the presence of the proturding resilient "0" ring will tend to 1 minimlse valve chatter, and hence minimise valve nolse from reciprocating pumping machinery. The valve members of this invention have been tested over a wide range~f pressures, and it ls believed that the configuration of the central we~ge member and the provision o~ internal securlng means, enables the "O"
ring to be securely held in place with mlnimal risk of pressure build up within the cavity which would otherwise tend to cause the "O" ring to pop out of the cavity as the valve was opened.
Finally, it will be appreciated that various alterations or modi-fications may be made to the foregoing withou~ departing from the scope of this inventlon as exemplified by the ~ollowing claims.
TITLE: VALVE SEAL
.
1 This invention relates to valves, and has particular applicatlon to valve members for use within valves such as faucets, screw down valves and the like, ~or liquids or gases.
Hitherto, valves for fluid control have generally utilised replace-able annular washers of a hard but somewhat resilient material, such as red fibre nylon, rubber or the like, adapted to seal against a ridged valve sea-t. Such washers deteriorate in use, and reguire higher and higher torque to effect a seal, so that the ridged seat cuts into the ~ace o~ the washer. This is a problem encountered with conventional domestic faucets. It is also a problem with larger valves, as valve spanners are often used to exert high torque to close off the valve as the washer deteriorates. This often damages the valve stem threads or valve body, as well as seriously lS damaging the washer~ and often exacerbates the problem.
In seeking to overcome this problem~ many attempts have been made to mount an "0" ring in a cage, to effect a seal.
Examples of such "0" ring seals are shown in the following patents:
U.S.P. 2,417,494, U.S.P. ~,658,716, U.S L P. 2,678,187, U.~.P. 2,89~,718, U.~.P. 2,g71,090~ U.S.P. 3,198,481, U.S.P. 3,612,479, U.S~P 3,996,965, Belglan P.N. 621,664, U.K.P. 884,529.
U.S.P. 2417494 and U.5.P. 2S78187 teach the use of an "0" ring as the main sealing element clamped in the face of a valve member by means of a screw and a clamping member.
Figure 3 o~ the Belgian Patent teaches the use of an "0" ring clamped within a cavity by a conical headed fastener and provides a relief passage 8 between the cavity and the rear of the valve member. In the two U.S. Patents first mentioned~ the "0" ring is allowed to protrude from the sealing face of the valve member. In U.K. Patent 884529, the "0" ring is held within a cavity, of such a size that the "O" ring is maintained within the cavity and does not protrude therefrom. This suffers from the disadvantage that dirt may be trapped within the cavity crea-ting damage to -the "O" ring with consequent risk oE loss o seal SUMMARY OF THE INVENTION
. . .
It is an object of this invention to provide an improved valve me~ber which obviates the disadvantages of the conventional flat washer arrangement.
In one aspect, the invention provides a valve member including a body having a sealing face, a cavity in said sealing face, a toroidal resilient sealing member positioned in said cavity and having a portion protruding from said sealing face, a wedge member adapted to hold said toroidal sealing memberin place, said wedge member being connected to said body by internal securing means, whereby said cavity is closed off by said toroidal sealing means being squeezed between said body and said wedge member.
In the specification, -the expression "internal securing means"
as applied to a valve member means any securing means which is not accessible to the fluid passageway in the valve. Accordingly, it excludes such arrangements as screws or bolts around which the fluid must flow, as in U.S. Patent No. 2,6787187 referred to above, for example, but includes such things as snap-fit or pop-fit arrangements, internally threaded members, frictionally held members, glued or welded members.
Other aspects of this invention, which should be considered in all its novel aspects, will become apparent from the following description which is given by way of example only, with refer-ence to the accompanying drawings, in which:
Figure 1 illustrates a schematic view of a faucet, and a pre-ferred valve member.
Figure 2 is a cross section through a first valve member, having a snap-fit connection between a wedge member and the body of the valve member.
Figure 3 shows an alternative valve member in which the wedge -member has a -threaded blind aperture connected to a threaded spigot protruding through the body of the valve member.
'7 1 ~5Lure 4 illustrates a valve member suitable ~or connection to a valve having a non-rising spindle arrangement.
Figure 5 illustrates an alternative snap-fit connection between the wedge member and body of the valve member.
Turning now to Figure 1, a conventional faucet 10 is illustrated schematically, and contains a valve member 13 in the form of a ~umper, which rests in the end of a vertically movable spindle 14 to thus close off communication between an inlet 11 and an outlet 12. The valve member 13 has a sealing face 15 adapted to seal against a flat seat 16.
Protruding from the sealing face of the valve member is a resilient toroidal sealing member in the form o~ a resilient "0" ring, which is trapped in the valve member. Th~s "0" ring, is held in place by a central wedge member 17 in such a fashion that the "0" ring is squeezed between the psripheral sides of a cavity in the body, and the edge of the wedge member thereby minimising the risk of liquid entering the cavity from the sealing face. The wedge member 17 - is attached to the body of the valve member by internal securing means, for example it may be glued, or welded to the internal face of the cavity within the body in the case of a plastics material, or connected thereto by an appropriate snap-fit ~astener, or threaded fastener as shown in the following drawings.
Figure 2 illustrates a valve member 20 having a cavity 21 w~th an undercut peripheral side wall 22, and a recess 23 adapted to receive a barbed end 24 of a snap-fit wedging member 25. The body of the valve member, and the wedging member are preferably formed of a plastics material e.g, nylon or acetyl, which is sufficiently hard to form a secure cage for a resilient "0" ring 26, but yet on the other hand enables the barbed end o~ the wedge member to snap-fit into the recessed 23.
~2~
1 The wedge member 25 prePerably has sloping sides 28, which slope at approximately 20 to the central axis oF the rearwardly facing splll 30 of the valve member. By this means, a resillent "0" ring 2G
can be held in place within a cavity 21, with the frus$o-conlcal wedge member 25 squeezing the "0" ring against the undercut peri-pheral side wall 22, so tha~ the "0" rlng is squeezed and partly protrudes from the main sealing ~ace 31 of the valve ~ember. By suitably shaping the peripheral side wall, it is possible to leave a relieving portion within the cavity 21 between the "0" ring and the wedge member 25.
Figure 3 shows an alternative arrangement in wh~ch a valve member 32 has a cage 33, and "0" rlng 34 within a cavity 35 in the cage, and held in place by a central wedge member 36. Holding the central wedge member 36 ~n place is a removable spill 379 having a threaded sp~got 38 extending through an aperture 39 in the rear of the cage, and into engagèment with a cQrresponding threaded recess 40 within the wedge member 36. By this means, the spill 37 can be unscrewed ~rom the valve member 36 to replace the "0"
ring if requ7red. In addition, if a different size of spill is required to fit a particular faucet, then the spill can be removed and replaced by a spill of a different diameter, enabling economies to be achieved in stock holding, by forming ~umpers for faucets, having common cages and wedge members, but forming spllls of different diameters, to enable ~umpers of the required dimensions to be assembled when required. For example, different manufact-urers produce ~" standard ~umpers with either ~" or 3/16"
diameter spllls.
The valve member of Figure 3 is preferably formed of metal, such as bronze, monel or st~inless steel, whilst the "0" ring can be formed of a resilient material such as rubber or viton.
Figure 4 shows a valve member 45 having a metal cage 46, a resilient "0" ring 47, and a wedge member 48 formed of a relatively hard plastics material such as nylon or acetyl, _ 5 _ 1 adapted to engage with a barbed spigot 49 o~ a non-rising splndle member 50. By providing the barbed spigot 49 of metal~ it wlll bite into and engage with the plastics wedye 48. Thus the barbed spigot 49 ls of a harder material than the wedge 4a, whilst the wedge 4~ is of a harder material than the resillent "0" ring ~7.
The non-rislng spindle member 40 can be o~ prismatlc shape, e.g.
a hexagon, and adapted to fit within a correspond~ng prismatic recess in a ~aucet body, so that rotation o~ a threaded spindle withln the prismatic member 50 will enable the spindle to rotate without rising, but will a~fect upwards or downwards movement of the prismatic member 50 thereby moving the valve member towards or away from a valve seat.
Flgure 5 illustrates an alternative snap-fit arrangement in which a valve mem~er 54 has a barbed central spigot 55 adapted to inter-engage wlth a corresponding recess 56 within a central wedgingmember 57. The body 58 of the valve member is conveniently formed as a Jumper having a central spill 59, integral therewith, and the body 58 may be formed of metal or plastics with an appropriate recess 60 in the sealing face thereof.
The central wedging member 57 is conveniently formed of a plastics material which is harder than the resilient "0" ring 61, yet is resilient enough to snap over the central barb 55. A suitable material for the wedging member 57 is acetyl or nylon, or other plastics material.
Whilst the valve member of this inventlon can he used with a con-ventional ridged seat, it is preferred that it is used in combina-tion with a ~lat seat. A flat seat is cheaper to produce than a ridged seat. Moreover, the protr~ding nature of the resilient "0"
ring ayainst a ~lat seat~ will tend to minimise underwater shock, when used in marine valves; and will assist in minimising noise of the valve in operation. This is advantageous in naval use, where the presence of the proturding resilient "0" ring will tend to 1 minimlse valve chatter, and hence minimise valve nolse from reciprocating pumping machinery. The valve members of this invention have been tested over a wide range~f pressures, and it ls believed that the configuration of the central we~ge member and the provision o~ internal securlng means, enables the "O"
ring to be securely held in place with mlnimal risk of pressure build up within the cavity which would otherwise tend to cause the "O" ring to pop out of the cavity as the valve was opened.
Finally, it will be appreciated that various alterations or modi-fications may be made to the foregoing withou~ departing from the scope of this inventlon as exemplified by the ~ollowing claims.
Claims (8)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A valve member including a body having a seal holding face, a cavity in said seal holding face, said cavity having an undercut peripheral lip, a toroidal resilient sealing member positioned in said cavity and having a portion protruding from said seal holding face, a frusto-conical wedge member positioned in said cavity within said toroidal sealing member and adapted to hold said toroidal sealing member in place, said wedge member being connected to said body by internal securing means (as herein defined), whereby said sealing member is squeezed between said wedge member and said undercut peripheral lip to allow a portion of said toroidal resilient sealing member to protrude from said seal holding face and to provide a seal between said peripheral lip and said toroidal sealing member and between said toroidal sealing member and said wedge member to thereby prevent fluid leaking into said cavity.
2. A valve member as claimed in Claim 1, wherein said internal securing means includes a projection on said wedge member adapted to engage a corresponding recess or aperture within said body.
3. A valve member as claimed in Claim 1, wherein said internal securing means includes a recess within said wedge member adapted to engage a corresponding projection within said body.
4. A valve member as claimed in Claim 3, wherein said projection has a screw thread adapted to mate with an integral screw thread within said recess.
5. A valve member as claimed in Claim 3, wherein said projection has a rib or ribs adapted to engage said recess.
6. A valve member as claimed in Claims 1, 2 or 3, having a spill protruding from the rear thereof.
7. A valve member as claimed in claims 1, 2 or 3, wherein the toroidal sealing means is an "O" ring.
8. A valve having a flat seat in combination with a valve member as claimed in Claims 1, 2 or 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000429244A CA1212657A (en) | 1983-05-30 | 1983-05-30 | Valve seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000429244A CA1212657A (en) | 1983-05-30 | 1983-05-30 | Valve seal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1212657A true CA1212657A (en) | 1986-10-14 |
Family
ID=4125359
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000429244A Expired CA1212657A (en) | 1983-05-30 | 1983-05-30 | Valve seal |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1212657A (en) |
-
1983
- 1983-05-30 CA CA000429244A patent/CA1212657A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |