CA2163231C - Compression cartridge - Google Patents
Compression cartridgeInfo
- Publication number
- CA2163231C CA2163231C CA002163231A CA2163231A CA2163231C CA 2163231 C CA2163231 C CA 2163231C CA 002163231 A CA002163231 A CA 002163231A CA 2163231 A CA2163231 A CA 2163231A CA 2163231 C CA2163231 C CA 2163231C
- Authority
- CA
- Canada
- Prior art keywords
- flange
- bonnet
- valve
- annular
- construction
- 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 - Fee Related
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
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Valve Housings (AREA)
- Lift Valve (AREA)
Abstract
A means for mounting a valve assembly in a plastic faucet cover plate and for securing said plate to a deck of a sink. The means comprise an annular seat (75) formed inside of a flange (74) in the cover plate (70) in which the valve is disposed, a plastic split annular retaining washer (60) adapted to be seated on said annular seat, and an annular flange (32) having an abutting surface on the bonnet (14) of said valve assembly (11) adapted to abut against the top of the retaining washer and press it against the seat when the valve assembly is inserted into the flange of the cover plate. The bonnet (14) also has improved sealing means comprised of an annular flange (21) having an undercut in its bottom into which is inserted a sealing member such as an O-ring (24). The sealing member is encapsulated on three sides by the material forming the bonnet.
Description
~ WO95/259]18 2 i ~ 3~ 3 1 ~ PCT~Sg4/03200 COMPRESSION CARTRIDGE
Field of the Invention This invention relates to valve assemblies for faucets and the like and to means for mounting said assemblies to cover plates or escutcheons, particularly those made of plastic.
Background of the Invention Valve assemblies comprised of bonnets and stems and their use with plastic cover plates or escutcheons are known and are disclosed, for example, in U.S. Patent No. 3,789,870. However, the conventional means for mounting these valve assemblies to plastic cover plates are generally unsatisfactory because they produce excessive strains and stresses on the cover plate. These stresses and strains sometimes result in cracking of the cover plate. Furthermore, the conventional means for mounting these valve assemblies are inefficient in production as they require the use of threaded hold down rings which require special attention to reduce cross threading. Eliminating these rings traditionally would have meant either a loose escutcheon or excessive stresses and strains which could lead to cracking of the cover.
The present invention provides a means of mounting valve assemblies to plastic cover plates without the production of excessive stresses and strains of conventional mounting systems.
Furthermore, the instant invention also permits the snap fit assembly of the underbodies, cover plate, and retAining washer after the underbody assembly has been suitably tested for leakage.
Summary of the Invention The instant invention provides a valve assembly comprised of a bonnet and stem having sealing means comprised of a circumferentially extending flange on the bonnet. The flange has an undercut providing a generally U-shaped space into which is inserted a sealing member such as an o-ring. The sealing member is encapsulated in this U-shaped space and is surrounded on three sides by the metal of the flange.
The instant invention further provides an improved means for mounting the valve assembly to a plastic cover plate and simultaneously securing the cover plate to the deck of a faucet ' ' " PCT1~594/03200 ~
or the like. The improved means comprises an annular split retaining washer which is dispose~d in an annular seat in the interior of a valve assembly re~e~iying flange in the cover plate.
The ret~i ni ng washer is forced against the seat by a shoulder formed on the underside of a flange in the bonnet. The cover plate is thus secured to the deck of a sink or the like.
Brief DescriPtion of the Drawings Figure 1 is a rear elevational view partially in section of the assembled valve assembly and cover plate;
Figure 2 is an exploded perspective view of the valve assembly, retaining ring, and part of the cover plate;
Figure 3 is a side elevational view in section of the valve assembly comprised of the bonnet and stem; and Figure 4 is a partial side elevational view in section of the valve assembly mounted in the cover plate.
Description of the Preferred Embodiment Referring to Fig. 1 there is illustrated a mixing faucet assembly 10 having a pair of spaced apart valve assemblies 11 and 12. Valve assemblies 11 and 12 are generally identical. Since both valve assemblies are generally identical only one will be described in detail. One valve assembly is disposed in underbody 80 while the other valve assembly is disposed in underbody 82.
One valve assembly controls the flow of hot water while the other controls the flow of cold water. Each underbody 80, 82 has a central passageway 84 extending therethrough and is provided with an externally threaded portion 86. Central passageway 84 has an internally threaded portion 85 adjacent its top end. A waterway 94 connects the two underbodies. A spout tube 95 is connected to waterway 94. The underbodies 80, 82 have port means 87 comprising an aperture which communicate with waterway 90.
Underbodies 80, 82 also have valve seats 88 disposed in passageway 84.
The valve assembly 11 includes a hollow bonnet 14 having a central bore 15 which has an internally threaded portion 16 adjacent its top end 17. The bore 15 has a relatively smooth portion 18 beneath the threaded portion 16 for reception of an O-ring 42.
'~'1 '6323"1 WO95/25918 ~PCT~S91~'~32~
~ 5 The bonnet 14 has external threads 19 adjacent its bottom end. These external threads~engage internally threaded portion 85 of underbody 80 to threadea~ly secure bonnet 14 in underbody 80. A flange 20 extends circ~mferentially around the exterior of bonnet 14. The flange 20 contains an undercut 21 which forms downwardly ext~n~ing outer rim 22 of the flange having an undersurface 23. A flexible sealing element 24 such as an 0-ring is disposed in undercut 21. This sealing element 24 is thus encapsulated on the top and both sides.
When the bonnet 14 is fully screwed into the underbody 80 the sealing element 24 forms a seal with the top annular edge 89 of underbody 80. Furthermore, as best seen in Fig. 4, the undersurface 23 of rim 22 abuts tightly against the top annular edge 89 thereby also forming a seal with top annular edge 89.
The bonnet 14 also has an annular raised section 30 having a larger outer diameter than the diameter of the relatively smooth section 31 immediately below raised section 30. A
circumferentially ext~n~;ng abutment means or flange 32 is provided immediately above raised section 30. The flange 32 has a shoulder 33 formed in the lower surface thereof. The outer surface of flange 32 is beveled from top toward bottom having a smaller outer diameter at the top and a larger outer diameter at the bottom. This outer shape of flange 32 facilitates the mounting of the retaining washer 60 on the bonnet 14. The shoulder 33, as more fully described infra, abuts against retaining washer 60 to keep cover 70 secured to the deck of a sink or the like.
A stem 40 has a valve disc 41 at the lower end thereof and a handle receiving means, such as a spline 43, at the upper end thereof. The valve disc 41 is preferably comprised of a flexible sealing material such as rubber and is disposed in a valve disc housing 48. The valve disc 41 is brought into sealing engagement with valve seat 88 in underbody 80.
A handle is conventionally received on spline 43 of stem 40 by engagement of its cylindrical hub with the spline and is retained thereon with the aid of a screw 52.
The stem 40 also has a threaded portion 44 below the spline 43 adapted to engage internally threaded portion 16 of bore 15 WO95/~5~18 PCT~$94/03200 2 1 6 3 2 3 ~
of the bonnet 14. An O-ring 42 is disposed in an annular recess 45 formed by two axially spaced apart annular ridges 46 and 47.
The ridges 46, 47 are located intermediate valve disc housing 48 and threaded portion 44. .~
In assembly of the valve assembl ~ ~ the o-ring 42 is placed on stem 40 and the bonnet 14 is then s h pped over splined end 43.
The bonnet 14 and stem 4 0 are assembled by engagement of the threads of the externally threaded portion 44 of stem 40 with the threads of the internally threaded portion 16 of bonnet 14.
Axial movement of stem 4 0 in the bonnet 14 is accomplished by rotation of the stem 40. Axially downward movement of stem 40 results in valve disc 41 sealing engaging valve seat 88 thereby shutting off the flow of water. Axially upward movement of stem 40 in bonnet 14 and in underbody 80 disengages valve disc 41 from valve seat 88 thereby allowing the flow of water through valve seat 88. Figure 1 illustrates the valve in the closed position with the stem 40 in the fully extended down position while Figure 4 illustrates the valve in the open position with the stem 41 in a fully up or retracted position.
The escutcheon or cover plate 70, preferably made of plastic, comprises a top wall 71 and slde walls 72. A snap-in bottom closure member 73, preferably made of plastic, is provided. To receive an individual valve assembly 11 the cover 70 has upstanding flanges 74 having an internal annular seat 75 adapted to receive split retaining washer 60. Annular seat 75 circumscribes opening 76.
Washer 60 is comprised of a suitable plastic material, preferably an engineering resin or resin blend such as celcon.
The washer 60 is designed to flex slightly thereby relieving the load on the cover 70 insofar as the washer is placed in shear.
Washer 60 has a radially extending slit 62 to enable removal and installation onto the bonnet 14. In the installation of the valve assembly 11 in cover plate 70 washer 60 is slipped over the top of bonnet 14 and over flange 32. The valve assembly 11 with the washer thereon is inserted through the opening 76 in flange 74 with the bonnet 14 being screwed into underbody 80 which is attached, such as by snap or interference fit, to cover 70. As the bonnet is screwed into underbody 80 shoulder 33 of flange 32 ~ WO95/25918 2 1 6 323 t PCT~594/03200 abuts washer 60 which is seated in seat 75 and forces it against seat 75. This locks or secures the cover plate 70 to the deck.
. ~ .
,.., ,: . _ - ,
Field of the Invention This invention relates to valve assemblies for faucets and the like and to means for mounting said assemblies to cover plates or escutcheons, particularly those made of plastic.
Background of the Invention Valve assemblies comprised of bonnets and stems and their use with plastic cover plates or escutcheons are known and are disclosed, for example, in U.S. Patent No. 3,789,870. However, the conventional means for mounting these valve assemblies to plastic cover plates are generally unsatisfactory because they produce excessive strains and stresses on the cover plate. These stresses and strains sometimes result in cracking of the cover plate. Furthermore, the conventional means for mounting these valve assemblies are inefficient in production as they require the use of threaded hold down rings which require special attention to reduce cross threading. Eliminating these rings traditionally would have meant either a loose escutcheon or excessive stresses and strains which could lead to cracking of the cover.
The present invention provides a means of mounting valve assemblies to plastic cover plates without the production of excessive stresses and strains of conventional mounting systems.
Furthermore, the instant invention also permits the snap fit assembly of the underbodies, cover plate, and retAining washer after the underbody assembly has been suitably tested for leakage.
Summary of the Invention The instant invention provides a valve assembly comprised of a bonnet and stem having sealing means comprised of a circumferentially extending flange on the bonnet. The flange has an undercut providing a generally U-shaped space into which is inserted a sealing member such as an o-ring. The sealing member is encapsulated in this U-shaped space and is surrounded on three sides by the metal of the flange.
The instant invention further provides an improved means for mounting the valve assembly to a plastic cover plate and simultaneously securing the cover plate to the deck of a faucet ' ' " PCT1~594/03200 ~
or the like. The improved means comprises an annular split retaining washer which is dispose~d in an annular seat in the interior of a valve assembly re~e~iying flange in the cover plate.
The ret~i ni ng washer is forced against the seat by a shoulder formed on the underside of a flange in the bonnet. The cover plate is thus secured to the deck of a sink or the like.
Brief DescriPtion of the Drawings Figure 1 is a rear elevational view partially in section of the assembled valve assembly and cover plate;
Figure 2 is an exploded perspective view of the valve assembly, retaining ring, and part of the cover plate;
Figure 3 is a side elevational view in section of the valve assembly comprised of the bonnet and stem; and Figure 4 is a partial side elevational view in section of the valve assembly mounted in the cover plate.
Description of the Preferred Embodiment Referring to Fig. 1 there is illustrated a mixing faucet assembly 10 having a pair of spaced apart valve assemblies 11 and 12. Valve assemblies 11 and 12 are generally identical. Since both valve assemblies are generally identical only one will be described in detail. One valve assembly is disposed in underbody 80 while the other valve assembly is disposed in underbody 82.
One valve assembly controls the flow of hot water while the other controls the flow of cold water. Each underbody 80, 82 has a central passageway 84 extending therethrough and is provided with an externally threaded portion 86. Central passageway 84 has an internally threaded portion 85 adjacent its top end. A waterway 94 connects the two underbodies. A spout tube 95 is connected to waterway 94. The underbodies 80, 82 have port means 87 comprising an aperture which communicate with waterway 90.
Underbodies 80, 82 also have valve seats 88 disposed in passageway 84.
The valve assembly 11 includes a hollow bonnet 14 having a central bore 15 which has an internally threaded portion 16 adjacent its top end 17. The bore 15 has a relatively smooth portion 18 beneath the threaded portion 16 for reception of an O-ring 42.
'~'1 '6323"1 WO95/25918 ~PCT~S91~'~32~
~ 5 The bonnet 14 has external threads 19 adjacent its bottom end. These external threads~engage internally threaded portion 85 of underbody 80 to threadea~ly secure bonnet 14 in underbody 80. A flange 20 extends circ~mferentially around the exterior of bonnet 14. The flange 20 contains an undercut 21 which forms downwardly ext~n~ing outer rim 22 of the flange having an undersurface 23. A flexible sealing element 24 such as an 0-ring is disposed in undercut 21. This sealing element 24 is thus encapsulated on the top and both sides.
When the bonnet 14 is fully screwed into the underbody 80 the sealing element 24 forms a seal with the top annular edge 89 of underbody 80. Furthermore, as best seen in Fig. 4, the undersurface 23 of rim 22 abuts tightly against the top annular edge 89 thereby also forming a seal with top annular edge 89.
The bonnet 14 also has an annular raised section 30 having a larger outer diameter than the diameter of the relatively smooth section 31 immediately below raised section 30. A
circumferentially ext~n~;ng abutment means or flange 32 is provided immediately above raised section 30. The flange 32 has a shoulder 33 formed in the lower surface thereof. The outer surface of flange 32 is beveled from top toward bottom having a smaller outer diameter at the top and a larger outer diameter at the bottom. This outer shape of flange 32 facilitates the mounting of the retaining washer 60 on the bonnet 14. The shoulder 33, as more fully described infra, abuts against retaining washer 60 to keep cover 70 secured to the deck of a sink or the like.
A stem 40 has a valve disc 41 at the lower end thereof and a handle receiving means, such as a spline 43, at the upper end thereof. The valve disc 41 is preferably comprised of a flexible sealing material such as rubber and is disposed in a valve disc housing 48. The valve disc 41 is brought into sealing engagement with valve seat 88 in underbody 80.
A handle is conventionally received on spline 43 of stem 40 by engagement of its cylindrical hub with the spline and is retained thereon with the aid of a screw 52.
The stem 40 also has a threaded portion 44 below the spline 43 adapted to engage internally threaded portion 16 of bore 15 WO95/~5~18 PCT~$94/03200 2 1 6 3 2 3 ~
of the bonnet 14. An O-ring 42 is disposed in an annular recess 45 formed by two axially spaced apart annular ridges 46 and 47.
The ridges 46, 47 are located intermediate valve disc housing 48 and threaded portion 44. .~
In assembly of the valve assembl ~ ~ the o-ring 42 is placed on stem 40 and the bonnet 14 is then s h pped over splined end 43.
The bonnet 14 and stem 4 0 are assembled by engagement of the threads of the externally threaded portion 44 of stem 40 with the threads of the internally threaded portion 16 of bonnet 14.
Axial movement of stem 4 0 in the bonnet 14 is accomplished by rotation of the stem 40. Axially downward movement of stem 40 results in valve disc 41 sealing engaging valve seat 88 thereby shutting off the flow of water. Axially upward movement of stem 40 in bonnet 14 and in underbody 80 disengages valve disc 41 from valve seat 88 thereby allowing the flow of water through valve seat 88. Figure 1 illustrates the valve in the closed position with the stem 40 in the fully extended down position while Figure 4 illustrates the valve in the open position with the stem 41 in a fully up or retracted position.
The escutcheon or cover plate 70, preferably made of plastic, comprises a top wall 71 and slde walls 72. A snap-in bottom closure member 73, preferably made of plastic, is provided. To receive an individual valve assembly 11 the cover 70 has upstanding flanges 74 having an internal annular seat 75 adapted to receive split retaining washer 60. Annular seat 75 circumscribes opening 76.
Washer 60 is comprised of a suitable plastic material, preferably an engineering resin or resin blend such as celcon.
The washer 60 is designed to flex slightly thereby relieving the load on the cover 70 insofar as the washer is placed in shear.
Washer 60 has a radially extending slit 62 to enable removal and installation onto the bonnet 14. In the installation of the valve assembly 11 in cover plate 70 washer 60 is slipped over the top of bonnet 14 and over flange 32. The valve assembly 11 with the washer thereon is inserted through the opening 76 in flange 74 with the bonnet 14 being screwed into underbody 80 which is attached, such as by snap or interference fit, to cover 70. As the bonnet is screwed into underbody 80 shoulder 33 of flange 32 ~ WO95/25918 2 1 6 323 t PCT~594/03200 abuts washer 60 which is seated in seat 75 and forces it against seat 75. This locks or secures the cover plate 70 to the deck.
. ~ .
,.., ,: . _ - ,
Claims (7)
1. An improved valve and cover plate construction comprising:
an underbody having an axial bore, a top edge, a valve seat below said top annular edge, and a valve assembly comprising a hollow bonnet and a stem movably disposed in said bonnet, a valve disc disposed at the bottom of said stem adapted to cooperate with said valve seat to regulate the fluid flow through said valve seat, said bonnet being fixedly disposed in said axial bore and said stem axially movable in said bonnet, the improvement comprising said bonnet having an annular flange extending circumferentially therearound, said flange having an undercut therein and a sealing element disposed in said undercut, said undercut being generally U-shaped and forming a downwardly extending outer rim having an undersurface on the radially outer edge of said flange adapted to sealingly engage at least a portion of said top annular edge of said underbody, and said cover plate having at least one flange having an opening therethrough adapted to receive said valve assembly, said flange having an annular seat circumscribing said opening and adapted to seat a retaining ring.
an underbody having an axial bore, a top edge, a valve seat below said top annular edge, and a valve assembly comprising a hollow bonnet and a stem movably disposed in said bonnet, a valve disc disposed at the bottom of said stem adapted to cooperate with said valve seat to regulate the fluid flow through said valve seat, said bonnet being fixedly disposed in said axial bore and said stem axially movable in said bonnet, the improvement comprising said bonnet having an annular flange extending circumferentially therearound, said flange having an undercut therein and a sealing element disposed in said undercut, said undercut being generally U-shaped and forming a downwardly extending outer rim having an undersurface on the radially outer edge of said flange adapted to sealingly engage at least a portion of said top annular edge of said underbody, and said cover plate having at least one flange having an opening therethrough adapted to receive said valve assembly, said flange having an annular seat circumscribing said opening and adapted to seat a retaining ring.
2. The construction of claim 1 wherein said sealing element is an O-ring.
3. The construction of claim 1 wherein said cover plate is comprised of plastic.
4. The construction of claim 1 wherein said retaining ring is split.
5. The construction of claim 4 wherein said bonnet has a second annular flange having an abutment surface on the bottom thereof.
6. The construction of claim 5 wherein said retaining ring is pressed against said annular seat by said abutment surface.
7. The construction of claim 6 wherein said second flange has an inclined outer surface to facilitate said retaining ring being pushed downwardly over said second flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002163231A CA2163231C (en) | 1994-03-24 | 1994-03-24 | Compression cartridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002163231A CA2163231C (en) | 1994-03-24 | 1994-03-24 | Compression cartridge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2163231A1 CA2163231A1 (en) | 1995-09-28 |
| CA2163231C true CA2163231C (en) | 1998-12-15 |
Family
ID=4156988
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002163231A Expired - Fee Related CA2163231C (en) | 1994-03-24 | 1994-03-24 | Compression cartridge |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2163231C (en) |
-
1994
- 1994-03-24 CA CA002163231A patent/CA2163231C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CA2163231A1 (en) | 1995-09-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |