US3948284A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rising-plug plug valve
Assignee: Dow Chemical Co
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Filing: 1974-08-19
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Granted: 1976-04-06
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Expires: 1994-08-19
Abstract
Abstract In a rising-plug plug valve wherein the plug and valve body at the narrow end of the plug define a cavity, a passage is provided between the cavity and the outlet opening of the plug valve. On opening, the valve plug and seat portion adjacent the narrowest portion of the plug is flushed by liquid passing therebetween and the outlet opening of the passageway.
Inventors
- 👤 Charles Joseph Walworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:12
CPC Classifications
F; F16; F16K; F16K5/00; F16K5/02; F16K5/025; F16K27/00; F16K27/06; F16K27/062; F16K5/08; F16K5/14; F16K5/16; F16K5/162; Y; Y10; Y10T; Y10T137/00; Y10T137/4238; Y10T137/4245; Y10T137/6851; Y10T137/7036
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
214 words
In an improved rising-plug plug valve comprising a valve body, the valve body defining an inlet opening, an outlet opening and a passage therein, the passage providing full communication between the inlet opening and the outlet opening, the valve body defining a plug receiving cavity having a generally frustoconical configuration, the plug receiving cavity intersecting the passageway between the inlet and the outlet, a plug disposed within the plug receiving cavity, the plug having a general frustoconical configuration and mating with at least a portion of the walls of the plug receiving cavity, the plug defining a fluid passageway which on rotation of the plug permits selective communication between the inlet and the outlet end, the plug having an end of major diameter and an end of minor diameter, the plug and valve body at the plug end of minor diameter defining a closed cavity, a means to selectively position the plug in the sealing engagement with the walls defining the plug receiving cavity and means to rotate the plug, the improvement which comprises providing a groove in a surface extending between the cavity defined by the plug and the body and the outlet passageway to thereby provide fluid communication between the cavity defined by the plug and the body and the outlet passageway.
Claim 2
Dependent Claim
214 words
In an improved rising-plug plug valve comprising a valve body, the valve body defining an inlet opening, an outlet opening and a passage therein, the passage providing full communication between the inlet opening and the outlet opening, the valve body defining a plug receiving cavity having a generally frustoconical configuration, the plug receiving cavity intersecting the passageway between the inlet and the outlet, a plug disposed within the plug receiving cavity, the plug having a general frustoconical configuration and mating with at least a portion of the walls of the plug receiving cavity, the plug defining a fluid passageway which on rotation of the plug permits selective communication between the inlet and the outlet end, the plug having an end of major diameter and an end of minor diameter, the plug and valve body at the plug end of minor diameter defining a closed cavity, a means to selectively position the plug in the sealing engagement with the walls defining the plug receiving cavity and means to rotate the plug, the improvement which comprises providing a groove in a surface extending between the cavity defined by the plug and the body and the outlet passageway to thereby provide fluid communication between the cavity defined by the plug and the body and the outlet passageway.
Claim 3
Dependent Claim
12 words
The valve of claim 1 wherein the valve body is plastic lined.
Claim 4
Dependent Claim
12 words
The valve of claim 2 wherein the valve plug is plastic lined.
Claim 5
Dependent Claim
234 words
In an improved plastic lined rising-plug plug valve comprising a valve body having a lining of a plastic material, the valve body defining an inlet opening, an outlet opening and a passage therein, the passage providing full communication between the inlet opening and the outlet opening, the valve body defining a plug receiving cavity having a generally frustoconical configuration, the plug receiving cavity intersecting the passageway between the inlet and the outlet, a plug having a lining and coating of a plastic material, the plug being disposed within the plug receiving cavity, the plug having a general frustoconical configuration and mating with at least a portion of the walls of the plug receiving cavity, the plug defining a fluid passageway which on rotation of the plug permits selective communication between the inlet and the outlet end, the plug having an end of major diameter and an end of minor diameter, the plug and valve body at the plug end of minor diameter defining a closed cavity, a means to selectively position the plug in the sealing engagement with the walls defining the plug receiving cavity and means to rotate the plug,, the improvement which comprises providing a groove in the plastic material between the cavity defined by the plug and the body and the outlet passageway thereby providing fluid communication between the cavity defined by the plug and the body and the outlet passageway.
Claim 6
Dependent Claim
234 words
In an improved plastic lined rising-plug plug valve comprising a valve body having a lining of a plastic material, the valve body defining an inlet opening, an outlet opening and a passage therein, the passage providing full communication between the inlet opening and the outlet opening, the valve body defining a plug receiving cavity having a generally frustoconical configuration, the plug receiving cavity intersecting the passageway between the inlet and the outlet, a plug having a lining and coating of a plastic material, the plug being disposed within the plug receiving cavity, the plug having a general frustoconical configuration and mating with at least a portion of the walls of the plug receiving cavity, the plug defining a fluid passageway which on rotation of the plug permits selective communication between the inlet and the outlet end, the plug having an end of major diameter and an end of minor diameter, the plug and valve body at the plug end of minor diameter defining a closed cavity, a means to selectively position the plug in the sealing engagement with the walls defining the plug receiving cavity and means to rotate the plug,, the improvement which comprises providing a groove in the plastic material between the cavity defined by the plug and the body and the outlet passageway thereby providing fluid communication between the cavity defined by the plug and the body and the outlet passageway.
Claim 7
Dependent Claim
222 words
In an improved rising-plug plug valve comprising a valve body, the valve body defining an inlet opening, an outlet opening and a passage therein, the passage providing full communication between the inlet opening and the outlet opening, the valve body defining a plug receiving cavity having a generally frustoconical configuration, the plug receiving cavity intersecting the passageway between the inlet and the outlet, a plug disposed within the plug receiving cavity, the plug having a general frustoconical configuration and mating with at least a portion of the walls of the plug receiving cavity, the plug defining a fluid passageway which on rotation of the plug permits selective communication between the inlet and the outlet end, the plug having an end of major diameter and an end of minor diameter, the plug and valve body at the plug end of minor diameter defining a closed cavity a means to selectively position the plug in the sealing engagement with the walls defining the plug receiving cavity and means to rotate the plug, the improvement which comprises a passageway between the cavity defined by the plug and the body and the outlet passageway, thereby providing fluid communication between the cavity defined by the plug and the body and the outlet passageway wherein the passageway is defined by mating grooves of the valve body and plug.
Claim 8
Dependent Claim
222 words
In an improved rising-plug plug valve comprising a valve body, the valve body defining an inlet opening, an outlet opening and a passage therein, the passage providing full communication between the inlet opening and the outlet opening, the valve body defining a plug receiving cavity having a generally frustoconical configuration, the plug receiving cavity intersecting the passageway between the inlet and the outlet, a plug disposed within the plug receiving cavity, the plug having a general frustoconical configuration and mating with at least a portion of the walls of the plug receiving cavity, the plug defining a fluid passageway which on rotation of the plug permits selective communication between the inlet and the outlet end, the plug having an end of major diameter and an end of minor diameter, the plug and valve body at the plug end of minor diameter defining a closed cavity a means to selectively position the plug in the sealing engagement with the walls defining the plug receiving cavity and means to rotate the plug, the improvement which comprises a passageway between the cavity defined by the plug and the body and the outlet passageway, thereby providing fluid communication between the cavity defined by the plug and the body and the outlet passageway wherein the passageway is defined by mating grooves of the valve body and plug.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-04-06 | 1979-10-06 | 1980-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-06 | 1983-10-06 | 1984-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-06 | 1987-10-06 | 1988-04-06 | $7700.00 | Window Closed / Lapsed |