US3880186A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flow control devices
Assignee: RTX Corp
•
Filing: 1974-03-25
•
Granted: 1975-04-29
•
Expires: 1994-03-25
Abstract
Abstract Control Devices for controlling the flow of fuel to a gas burner. In a first embodiment of the invention a main valve is operated by a bleed controlled diaphragm. An electromagnetic operator operates an on-off bleed valve and an orifice bleed valve. The orifice bleed valve includes an operating stem surrounded by a valve collar through which an aperture extends. When the electromagnetic operator is deenergized, the on-off bleed valve is closed and a leaf spring is prevented from urging the orifice bleed valve collar against a corresponding valve seat, assuring full bleed flow to the operating chamber and maintaining the main valve in a closed position. When the electromagnetic operator is energized, the leaf spring is allowed to urge the orifice bleed valve collar against its corresponding valve seat and the on-off bleed valve is opened. Bleed gas is then supplied through the restricted aperture in the orifice bleed valve collar and is bled off to a servo regulator by the on-off bleed valve, reducing the operating chamber pressure, allowing the main valve to open and regulating the outlet pressure. A second embodiment of the invention provides a step flow to the burner which is pressure regulated on both low and high flow states. The first opening step is controlled in the same manner as the first embodiment of the invention. The second opening step, however, is provided by a second electromagnetic operated valve which, when opened, places the low pressure servo regulator and a high pressure servo regulator in parallel. When the servo regulators are connected in parallel, the high pressure regulator is dominant in regulating the outlet pressure.
Inventors
- 👤 Jess H Turner
- 👤 Elmer E Wallace
- 👤 Claud C Hurd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:06
CPC Classifications
F; F23; F23N; F23N1/00; F23N1/005; F23N2235/00; F23N2235/12; F23N2235/14; F23N2235/18; F23N2235/20; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7782
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
285 words
A control device for controlling the flow of fuel to a gas burner, comprising: a casing having inlet and outlet means; main valve means for controlling the flow of fuel between said inlet and outlet means; a diaphragm operably connected to said main valve means, said diaphragm defining an operating pressure chamber between a wall on said casing and said diaphragm, and being responsive to a pressure differential on both sides thereof to operate said main valve means; a first bleed flow path connecting said inlet means with said outlet means; a second bleed flow path connecting said first bleed flow path with said operating chamber; an orifice bleed valve disposed in said first bleed flow path upstream from said second bleed flow path; said orifice bleed valve comprising a valve member disposed for open and closed relationship with a corresponding valve seat, said valve member having a restricted orifice extending therethrough, said restricted orifice being disposed for registry with an opening through said valve seat so that the flow of bleed gas is restricted when said valve member is closed; and unrestricted when said valve member is open; an on-off bleed valve disposed in said first bleed flow path downstream from said second bleed flow path; means for normally biasing said on-off bleed valve to a normally closed position; means for normally biasing said orifice bleed valve to an open position; and automatic means for closing said orifice bleed valve and opening said on-off bleed valve whereby bleed gas is bled off from said operating pressure chamber at a rate higher than can be supplied through said restrIcted orifice to reduce the pressure therein and move said diaphragm to operate said main valve means.
Claim 2
Dependent Claim
285 words
A control device for controlling the flow of fuel to a gas burner, comprising: a casing having inlet and outlet means; main valve means for controlling the flow of fuel between said inlet and outlet means; a diaphragm operably connected to said main valve means, said diaphragm defining an operating pressure chamber between a wall on said casing and said diaphragm, and being responsive to a pressure differential on both sides thereof to operate said main valve means; a first bleed flow path connecting said inlet means with said outlet means; a second bleed flow path connecting said first bleed flow path with said operating chamber; an orifice bleed valve disposed in said first bleed flow path upstream from said second bleed flow path; said orifice bleed valve comprising a valve member disposed for open and closed relationship with a corresponding valve seat, said valve member having a restricted orifice extending therethrough, said restricted orifice being disposed for registry with an opening through said valve seat so that the flow of bleed gas is restricted when said valve member is closed; and unrestricted when said valve member is open; an on-off bleed valve disposed in said first bleed flow path downstream from said second bleed flow path; means for normally biasing said on-off bleed valve to a normally closed position; means for normally biasing said orifice bleed valve to an open position; and automatic means for closing said orifice bleed valve and opening said on-off bleed valve whereby bleed gas is bled off from said operating pressure chamber at a rate higher than can be supplied through said restrIcted orifice to reduce the pressure therein and move said diaphragm to operate said main valve means.
Claim 3
Dependent Claim
34 words
The control device as claimed in claim 1, wherein said automatic means comprises an electromagnetic valve operator energized by closure of a first thermostat connecting said electromagnetic valve operator to a source of power.
Claim 4
Dependent Claim
25 words
The control device as claimed in claim 1, wherein a servo regulator is disposed in said first bleed flowpath downstream from said on-off bleed valve.
Claim 5
Dependent Claim
93 words
The control device as claimed in claim 3, further comprising: a third bleed flow path connected to said first bleed flow path intermediate said on-off bleed valve and said servo regulator and connected to said outlet means; a second on-off valve disposed in said third bleed flow path; means for opening said second on-off valve; and a second servo regulator disposed in said third bleed flow path downstream from said second on-off valve, said second servo regulator being adjusted to regulate the outlet pressure at a higher pressure than said first servo regulator.
Claim 6
Dependent Claim
23 words
The control device as claimed in claim 4 wherein said means for opening said second on-off valve comprises a second electromagnetic valve operator.
Claim 7
Dependent Claim
25 words
The control device as claimed in claim 5, wherein said second electromagnetic valve operator is energized by closure of a second set of thermostat contacts.
Claim 8
Dependent Claim
42 words
The control device as claimed in claim 5, wherein the energization of said second electromagnetic valve operator is controlled by a time delay which energizes said second electromagnetic valve operator a predetermined time interval after said first electromagnetic valve operator is energized.
Claim 9
Dependent Claim
210 words
A control device for controlling the flow of fuel to a gas burner, comprising: a casing having inlet and outlet means; main valve means for controlling the flow of fuel between said inlet and outlet means; a diaphragm operably connected to said main valve means, said diaphragm defining an operating pressure chamber between a wall on said casing and said diaphragm, and being responsive to a pressure differential on both sides thereof to operate said main valve means; a first bleed flow path connecting said inlet with said outlet; a second bleed flow path connecting said first bleed flow path with said operating pressure chamber; a first electrically operated valve located in said first bleed flow path downstream from the junction of said first and second bleed flow paths; a first servo regulator located in said first bleed flow path downstream from the junction of said first and second bleed flow paths; a second servo regulator connected in parallel with said first servo regulator and being adjusted to regulate the pressure in said outlet at a higher pressure than said first servo regulator; a second electrically operated valve controlling the flow of bleed gas to said second servo regulator; and means for energizing said first and second electrically operated valves.
Claim 10
Dependent Claim
210 words
A control device for controlling the flow of fuel to a gas burner, comprising: a casing having inlet and outlet means; main valve means for controlling the flow of fuel between said inlet and outlet means; a diaphragm operably connected to said main valve means, said diaphragm defining an operating pressure chamber between a wall on said casing and said diaphragm, and being responsive to a pressure differential on both sides thereof to operate said main valve means; a first bleed flow path connecting said inlet with said outlet; a second bleed flow path connecting said first bleed flow path with said operating pressure chamber; a first electrically operated valve located in said first bleed flow path downstream from the junction of said first and second bleed flow paths; a first servo regulator located in said first bleed flow path downstream from the junction of said first and second bleed flow paths; a second servo regulator connected in parallel with said first servo regulator and being adjusted to regulate the pressure in said outlet at a higher pressure than said first servo regulator; a second electrically operated valve controlling the flow of bleed gas to said second servo regulator; and means for energizing said first and second electrically operated valves.
Claim 11
Dependent Claim
18 words
The device as claimed in claim 8, wherein said first and second electrically operated valves are energized sequentially.
Claim 12
Dependent Claim
36 words
The device as claimed in claim 9, wherein the energization of said first electrically operated valve is controlled by a thermostat and the energization of said second electrically operated valve is controlled by a time delay.
Claim 13
Dependent Claim
25 words
The device as claimed in claim 8, wherein the energization of said first and second electrically operated valves is controlled by a two stage thermostat.
Claim 14
Dependent Claim
22 words
The device as claimed is claim 8, wherein one of said first and second electrically operated valves in an electromagnetically operated valve.
Claim 15
Dependent Claim
24 words
The device as claimed in claim 1, wherein said first bleed flow path is the only bleed flow path connected to said inlet means.
Claim 16
Dependent Claim
23 words
The device as claimed in claim 1, wherein said automatic means simultaneously closes said orifice bleed valve and opens said on-off bleed valve.
Claim 17
Dependent Claim
263 words
A control device for controlling thE flow of fuel to a gas burner, comprising: a casing having inlet and outlet means; main valve means for controlling the flow of fuel between said inlet and outlet means; a diaphragm operably connected to said main valve means, said diaphragm defining an operating pressure chamber between a wall on said casing and said diaphragm, said diaphragm being responsive to a pressure differential on both sides thereof to operate said main valve means; a single bleed passageway connected to said inlet means; a first bleed flow path connecting said single bleed passageway with said outlet means; a second bleed flow path connecting said first bleed flow path with said operating chamber; an orifice bleed valve disposed in said first bleed flow path upstream from said second bleed flow path; said orifice bleed valve comprising a valve member disposed for open and closed relationship with a corresponding valve seat, said valve member having a restricted orifice extending therethrough, said orifice being disposed for registry with an opening through valve seat so that the flow of bleed gas is restricted when said valve member is closed; an on-off bleed valve disposed in said first bleed flow path downstream from said second bleed flow path; means for normally biasing said on-off bleed valve to a normally closed position; and automatic means for simultaneously closing said orifice bleed valve and opening said on-off bleed valve whereby bleed gas is bled off from said operating pressure chamber to reduce the pressure therein and move said diaphragm to operate said main valve means.
Claim 18
Dependent Claim
263 words
A control device for controlling thE flow of fuel to a gas burner, comprising: a casing having inlet and outlet means; main valve means for controlling the flow of fuel between said inlet and outlet means; a diaphragm operably connected to said main valve means, said diaphragm defining an operating pressure chamber between a wall on said casing and said diaphragm, said diaphragm being responsive to a pressure differential on both sides thereof to operate said main valve means; a single bleed passageway connected to said inlet means; a first bleed flow path connecting said single bleed passageway with said outlet means; a second bleed flow path connecting said first bleed flow path with said operating chamber; an orifice bleed valve disposed in said first bleed flow path upstream from said second bleed flow path; said orifice bleed valve comprising a valve member disposed for open and closed relationship with a corresponding valve seat, said valve member having a restricted orifice extending therethrough, said orifice being disposed for registry with an opening through valve seat so that the flow of bleed gas is restricted when said valve member is closed; an on-off bleed valve disposed in said first bleed flow path downstream from said second bleed flow path; means for normally biasing said on-off bleed valve to a normally closed position; and automatic means for simultaneously closing said orifice bleed valve and opening said on-off bleed valve whereby bleed gas is bled off from said operating pressure chamber to reduce the pressure therein and move said diaphragm to operate said main valve means.
Claim 19
Dependent Claim
290 words
A control device for controlling the flow of fuel to a gas burner, comprising: a casing having inlet and outlet means; main valve means for controlling the flow of fuel between said inlet and outlet means; a diaphragm operably connected to said main valve means, said diaphragm defining an operating pressure chamber between a wall on said casing and said diaphragm, and being responsive to a pressure differential on both sides thereof to operate said main valve means; a first bleed flow path connecting said inlet means with said outlet means; a second bleed flow path connecting said first bleed flow path with said operating chamber; an orifice bleed valve disposed in said first bleed flow path upstream from said second bleed flow path; said orifice bleed valve comprising a valve member disposed for open and closed relationship with a corresponding valve seat, said valve member having a restricted orifice extending therethrough, said orifice being disposed for registry with an opening through said valve seat so that the flow of bleed gas is restricted when said valve member is closed; an on-off bleed valve disposed in said first bleed flow path downstream from said second bleed flow path; means for normally biasing said on-off bleed valve to a normally closed position; leaf spring means for urging said orifice bleed valve to the closed position; and an electrically operated valve operator movable between energized and deenergized positions, said valve operator urging said orifice bleed valve to the open position and allowing said on-off bleed valve to be biased to the normally closed position when deenergized, said valve operator allowing said leaf spring means to urge said orifice bleed valve to the closed position and opening said on-off bleed valve when energized.
Claim 20
Dependent Claim
290 words
A control device for controlling the flow of fuel to a gas burner, comprising: a casing having inlet and outlet means; main valve means for controlling the flow of fuel between said inlet and outlet means; a diaphragm operably connected to said main valve means, said diaphragm defining an operating pressure chamber between a wall on said casing and said diaphragm, and being responsive to a pressure differential on both sides thereof to operate said main valve means; a first bleed flow path connecting said inlet means with said outlet means; a second bleed flow path connecting said first bleed flow path with said operating chamber; an orifice bleed valve disposed in said first bleed flow path upstream from said second bleed flow path; said orifice bleed valve comprising a valve member disposed for open and closed relationship with a corresponding valve seat, said valve member having a restricted orifice extending therethrough, said orifice being disposed for registry with an opening through said valve seat so that the flow of bleed gas is restricted when said valve member is closed; an on-off bleed valve disposed in said first bleed flow path downstream from said second bleed flow path; means for normally biasing said on-off bleed valve to a normally closed position; leaf spring means for urging said orifice bleed valve to the closed position; and an electrically operated valve operator movable between energized and deenergized positions, said valve operator urging said orifice bleed valve to the open position and allowing said on-off bleed valve to be biased to the normally closed position when deenergized, said valve operator allowing said leaf spring means to urge said orifice bleed valve to the closed position and opening said on-off bleed valve when energized.
References Cited (Backward Citations)
US3304002A
Cited
US3351085A
Cited
US3502101A
Cited
US3552430A
Cited
US3685732A
Cited
US3796229A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-28 | 1978-10-28 | 1979-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-28 | 1982-10-28 | 1983-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-28 | 1986-10-28 | 1987-04-29 | $7700.00 | Window Closed / Lapsed |