US3559884A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas valve
Assignee: Emerson Electric Co
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Filing: 1969-02-19
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Granted: 1971-02-02
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Expires: 1989-02-19
Abstract
Abstract A manifold gas valve having a biased closed fluid-pressureoperated main valve, in which unregulated supply line pressure is applied to both sides of the valve operator, and in which a single pressure regulator operates to maintain a predetermined bleedoff rate from one side of the valve operator and to maintain a predetermined flow to a pilot burner under conditions of varying supply line pressure.
Inventors
- 👤 Charles C Visos
- 👤 John J Love
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:41
CPC Classifications
F; F23; F23N; F23N5/00; F23N5/02; F23N5/10; F23N5/107; F23N2235/00; F23N2235/12; F23N2235/20; F23N2235/24; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7758; Y10T137/7762; Y10T137/7764
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
283 words
A valve device operative to supply gas at a substantially constant predetermined pressure to the metering orifices of main and pilot gas burners, the device comprising a valve body having an inlet passage, a main burner outlet passage, a pilot burner outlet, and a valve chamber connecting said inlet and main burner outlet passages, a biased closed main valve in said chamber controlling the flow from said inlet passage to said main burner outlet passage and including a fluid pressure responsive actuator operative to open said valve when a greater fluid pressure is applied to one side thereof than to the other, one side of said actuator being in free communication with said inlet passage, a restricted passage providing limited communication between said inlet passage and the other side of said actuator, a bleedoff passage leading from said other side of said valve actuator to said main burner outlet passage, a pressure regulator controlling the flow through said bleedoff passage, a thermostatically operated valve controlling the flow through said bleedoff passage at a point between said pressure regulator and said main burner outlet passage, and a branch passage connecting said pilot burner outlet with said bleedoff passage at a point between said pressure regulator and said thermostatically operated valve, and said restricted passage being calibrated to permit sufficient flow from said inlet passage to said other side of said valve actuator to hold said main valve closed and to maintain a predetermined pressure at the metering orifice of a pilot burner connected to said pilot outlet when said thermostatically operated valve is closed while yet restricting the flow sufficiently to cause said main valve to open when said thermostatically operated valve is open.
Claim 2
Dependent Claim
283 words
A valve device operative to supply gas at a substantially constant predetermined pressure to the metering orifices of main and pilot gas burners, the device comprising a valve body having an inlet passage, a main burner outlet passage, a pilot burner outlet, and a valve chamber connecting said inlet and main burner outlet passages, a biased closed main valve in said chamber controlling the flow from said inlet passage to said main burner outlet passage and including a fluid pressure responsive actuator operative to open said valve when a greater fluid pressure is applied to one side thereof than to the other, one side of said actuator being in free communication with said inlet passage, a restricted passage providing limited communication between said inlet passage and the other side of said actuator, a bleedoff passage leading from said other side of said valve actuator to said main burner outlet passage, a pressure regulator controlling the flow through said bleedoff passage, a thermostatically operated valve controlling the flow through said bleedoff passage at a point between said pressure regulator and said main burner outlet passage, and a branch passage connecting said pilot burner outlet with said bleedoff passage at a point between said pressure regulator and said thermostatically operated valve, and said restricted passage being calibrated to permit sufficient flow from said inlet passage to said other side of said valve actuator to hold said main valve closed and to maintain a predetermined pressure at the metering orifice of a pilot burner connected to said pilot outlet when said thermostatically operated valve is closed while yet restricting the flow sufficiently to cause said main valve to open when said thermostatically operated valve is open.
Claim 3
Dependent Claim
68 words
A valve device as set forth in claim 1, in which said branch passage connecting said pilot outlet with said bleedoff passage is sufficiently restrictive to prevent a bleedoff therethrough which will cause said main valve to open when said thermostatically operated valve is closed, yet permits sufficient flow therethrough to maintain said predetermined pressure at the metering orifice of a pilot burner connected to said pilot outlet.
Claim 4
Dependent Claim
41 words
A valve device as set forth in claim 1 which further includes a manually operated valve controlling the flow through said bleedoff passage at a point therealong between the junction therewith of said branch passage and said main burner outlet passage.
Claim 5
Dependent Claim
28 words
A valve device as set forth in claim 1 in which said thermostatically actuated valve includes means effecting a snap action operation thereof between closed and open positions.
Claim 6
Dependent Claim
101 words
A valve device as set forth in claim 1 which further includes a manual valve having a first portion thereof operative to control flow through said inlet passage and a second portion thereof operative to control flow through said bleedoff passage, which valve portions are arranged with respect to said passages so that both passages are closed when said valve is moved in one direction to a closed position and so that said inlet passage is at least partially opened before any opening of said bleedoff passage occurs as said valve is moved in an opposite direction toward an open position.
Claim 7
Dependent Claim
133 words
A valve device as set forth in claim 1 which further includes a manual valve having a first portion thereof operative to control the flow through said inlet passage at a point therealong upstream from the intersection therewith of said restricted passage, a second portion thereof operative to control the flow through said bleedoff passage, and a third portion thereof operative to control the flow through said restricted passage, said valve portions being arranged with resPect to said passages so that when said valve is moved in one direction to a closed position all flow through said passages is cut off and so that when said valve is moved in an opposite direction from said closed position said restricted passage, said inlet passage, and said bleed passage are sequentially opened in that order.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |