US3788600A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gate valve
Assignee: Cooper Industries LLC
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Filing: 1972-08-24
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Granted: 1974-01-29
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Expires: 1992-08-24
Abstract
Abstract There is disclosed a gate valve having a non-rising stem which is adapted to form a metal-to-metal seal with the valve bonnet to contain pressure therein upon destruction of the primary, rubberlike stem seal.
Inventors
- 👤 H Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:06
CPC Classifications
F; F16; F16K; F16K41/00; F16K41/02; F16K41/023; F16K17/00; F16K17/36; F16K17/38; F16K17/383; F16K3/00; F16K3/30; F16K3/316; Y; Y10; Y10T; Y10T137/00; Y10T137/1624; Y10T137/1797; Y10T137/1812
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
215 words
A gate valve, comprising a valve body having a flowway therethrough and a chamber therein intersecting the flowway and opening to one side of the valve body, a bonnet sealably connected to the valve body and having a bore therethrough aligned with the chamber opening, a gate slidable within the chamber between positions opening and closing the flowway, a stem rotatably mounted in the bore of the bonnet, said stem including an inner section threadedly connected to the gate and an outer section having a spline connection to the inner section to permit relative axial movement therebetween and extending through the outer end of the bonnet bore to provide an exterior part to which rotation may be imparted, a seal member of rubber-like material in the bonnet for sealing about the inner stem section, bearing means in the bonnet for holding the inner stem section against axial movement so that rotation of said stem causes the gate to move between flowway opening and closing positions, an inwardly facing annular shoulder on the bonnet bore, and an outwardly facing annular shoulder on the outer stem section for forming a metal-to-metal seal with the bonnet shoulder to close off the interior of said bonnet whereby fluid is contained therein in the event said seal member is destroyed.
Claim 2
Dependent Claim
215 words
A gate valve, comprising a valve body having a flowway therethrough and a chamber therein intersecting the flowway and opening to one side of the valve body, a bonnet sealably connected to the valve body and having a bore therethrough aligned with the chamber opening, a gate slidable within the chamber between positions opening and closing the flowway, a stem rotatably mounted in the bore of the bonnet, said stem including an inner section threadedly connected to the gate and an outer section having a spline connection to the inner section to permit relative axial movement therebetween and extending through the outer end of the bonnet bore to provide an exterior part to which rotation may be imparted, a seal member of rubber-like material in the bonnet for sealing about the inner stem section, bearing means in the bonnet for holding the inner stem section against axial movement so that rotation of said stem causes the gate to move between flowway opening and closing positions, an inwardly facing annular shoulder on the bonnet bore, and an outwardly facing annular shoulder on the outer stem section for forming a metal-to-metal seal with the bonnet shoulder to close off the interior of said bonnet whereby fluid is contained therein in the event said seal member is destroyed.
Claim 3
Dependent Claim
37 words
A valve of the character defined in claim 1, including means for venting the interior of said bonnet, and means for closing said venting means in response to a temperature at which said seal member is destroyed.
Claim 4
Dependent Claim
43 words
A valve of the character defined in claim 2, wherein said venting means comprises means disposed between said annular shoulders and being fusible in the presence of said temperature to permit the stem section shoulder to move into engagement with the bonnet shoulder.
Claim 5
Dependent Claim
43 words
A valve of the character defined in claim 3, including a seal ring carried by the outer stem section for engaging obe bonnet bore at its outer end so as to contain lubricant in the bonnet prior to fusing of said spacing means.
Claim 6
Dependent Claim
64 words
A valve of the character defined in claim 2, wherein said venting means comprises means providing a port through the outer stem section, a closure for the port and urged toward port closing position, and means holding the closure away from port closing position and being fusible in the presence of said temperature to permit said closure to be urged to port closing position.
Claim 7
Dependent Claim
25 words
A valve of the character defined in claim 1, including spring means engaging the outer stem section to urge its shoulder against the bonnet shoulder.
Claim 8
Dependent Claim
18 words
A valve of the character defined in claim 6, wherein the spring means acts between the stem sections.
Claim 9
Dependent Claim
66 words
A valve of the character defined in claim 1, wherein said bonnet includes a base portion and a cap connected to the base portion, said seal member being carried in and said inner stem section being supported on the base section, said cap having means for holding the inner stem section down, and said bonnet shoulder being formed on the cap outwardly of the holding means.
Claim 10
Dependent Claim
177 words
A fire seal attachment for a gate valve having a bonnet base portion, a non-rising stem section having an outer end extending through the base portion, a spline on the outer end of the non-rising stem section, and a seal member of rubber-like material carried within the bonnet to seal about the non-rising stem section, said attachment comprising a cap having a hole in one end and means at the other end of connection to the base portion in surrounding relation to the outer end of the non-rising stem section, another stem section having an inner end with a spline for connection to the spline on the non-rising stem section to permit relative axial movement therebetween and an outer end which extends through the hole in the cap, an inwardly facing annular shoulder on the cap, and an outwardly facing annular shoulder on the other stem section for forming a metal-to-metal seal with the cap shoulder to close off the interior of the bonnet, whereby fluid is contained therein in the event said seal member is destroyed.
Claim 11
Dependent Claim
177 words
A fire seal attachment for a gate valve having a bonnet base portion, a non-rising stem section having an outer end extending through the base portion, a spline on the outer end of the non-rising stem section, and a seal member of rubber-like material carried within the bonnet to seal about the non-rising stem section, said attachment comprising a cap having a hole in one end and means at the other end of connection to the base portion in surrounding relation to the outer end of the non-rising stem section, another stem section having an inner end with a spline for connection to the spline on the non-rising stem section to permit relative axial movement therebetween and an outer end which extends through the hole in the cap, an inwardly facing annular shoulder on the cap, and an outwardly facing annular shoulder on the other stem section for forming a metal-to-metal seal with the cap shoulder to close off the interior of the bonnet, whereby fluid is contained therein in the event said seal member is destroyed.
Claim 12
Dependent Claim
32 words
An attachment of the character, defined in claim 9, including means disposed between said annular shoulders and being fusible in the presence of a temperature at which said seal member is destroyed.
Claim 13
Dependent Claim
58 words
An attachment of the character defined in claim 9, including means providing a port through said other stem section, a closure for the port adapted to be urged to port closing position, and means holding the closure away from port closing position and being fusible in the presence of a temperature at which said seal member is destroyed.
Claim 14
Dependent Claim
33 words
An attachment of the character, as defined in claim 9, including a spring disposable between the non-rising stem section and the other stem section to urge said stem shoulder against said cap shoulder.
Claim 15
Dependent Claim
202 words
A fire seal attachment for a gate valve having a bonnet base portion, a stem section having an outer end extending through the base portion, and a seal member of rubber-like material carried within the bonnet to seal about the stem section, said attachment comprising a bearing part connectable to the outer end of the stem section, a spline on the bearing part, a cap having means at one end for connection to the base portion in surrounding relation to the outer end of the non-rising stem section and a hole in the other end, means on the cap for holding the bearing part against the bonnet portion to prevent axial movement of said stem section, another stem section having an inner end with a spline for connection to the spline on the bearing part to permit relative axial movement therebetween and an outer end which extends through the hole in the cap, an inwardly facing annular shoulder on the cap, and an outwardly facing annular shoulder on the other stem section for forming a metal-to-metal seal with the cap shoulder to close off the interior of the bonnet, whereby fluid is contained therein in the event said seal member is destroyed.
Claim 16
Dependent Claim
202 words
A fire seal attachment for a gate valve having a bonnet base portion, a stem section having an outer end extending through the base portion, and a seal member of rubber-like material carried within the bonnet to seal about the stem section, said attachment comprising a bearing part connectable to the outer end of the stem section, a spline on the bearing part, a cap having means at one end for connection to the base portion in surrounding relation to the outer end of the non-rising stem section and a hole in the other end, means on the cap for holding the bearing part against the bonnet portion to prevent axial movement of said stem section, another stem section having an inner end with a spline for connection to the spline on the bearing part to permit relative axial movement therebetween and an outer end which extends through the hole in the cap, an inwardly facing annular shoulder on the cap, and an outwardly facing annular shoulder on the other stem section for forming a metal-to-metal seal with the cap shoulder to close off the interior of the bonnet, whereby fluid is contained therein in the event said seal member is destroyed.
Claim 17
Dependent Claim
32 words
An attachment of the character defined in claim 13, including means disposed between said annular shoulders and being fusible in the presence of a temperature at which said seal member is destroyed.
Claim 18
Dependent Claim
58 words
An attachment of the character, defined in claim 13, including means providing a port through said other stem section, a closure for the port adapted to be urged to port closing position, and means holding the closure away from port closing position and being fusible in the presence of a temperature at which said seal member is destroyed.
Claim 19
Dependent Claim
31 words
An attachment of the character, defined in claim 13, including a spring disposable between the bearing part and the other stem section to urge said stem shoulder against said cap shoulder.
References Cited (Backward Citations)
US3174495A
Cited
US3472485A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-28 | 1977-07-30 | 1978-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-28 | 1981-07-30 | 1982-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-28 | 1985-07-30 | 1986-01-29 | $7700.00 | Window Closed / Lapsed |