US3570542A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pilot operated valve having auxiliary valve control
Assignee: Automatic Switch Co
•
Filing: 1969-09-24
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Granted: 1971-03-16
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Expires: 1989-09-24
Abstract
Abstract The valve has a main valve member whose position (open or closed) is controlled by a pilot valve adapted to vent the high pressure side of the main valve member. The pilot valve is operated by an actuating means responsive to fluid pressure at an actuating pressure port. The actuating means communicates with the actuating pressure port via an auxiliary or conditioning valve. The conditioning valve is opened by fluid pressure applied to a ''''set'''' port, and remains open until fluid pressure is applied to a ''''trip'''' port, which closes it. Fluid pressure at the actuating pressure port operates the pilot valve and hence permits opening of the main valve only when the conditioning valve is open. A series of these valves automatically operate sequentially if the outlet port of each communicates with its own trip port and the set port of the next succeeding valve.
Inventors
- 👤 Noel Otto
- 👤 Herbert H Kaemmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:39
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/02; B01D46/04; B01D46/42; B01D46/4272; B01D46/66; B01D46/74; B01D46/76; F; F16; F16K; F16K31/00; F16K31/12; F16K31/36; F16K31/38; F16K31/385; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86928
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
296 words
A valve comprising: a. a valve body having an inlet port, an outlet port, and an orifice between said ports surrounded by a valve seat; b. a main valve member movable into and out of engagement with said valve seat to close and open the valve, respectively; c. a chamber on the side of said valve member opposite said valve seat, said chamber communicating with said inlet port, whereby inlet pressure is applied to said opposite side of said valve member to keep the valve closed; d. a vent opening in said body; e. a pilot valve carried by said body establishing communication between said chamber and said vent opening, whereby when said pilot valve is opened the pressure in said chamber is reduced and the valve is permitted to open; f. a conditioning valve carried by said body and having an open and a closed position; g. a set port and a trip port in said body for alternatively receiving pressurized fluid to open and close said conditioning valve, respectively; h. an actuating pressure port in said body adapted to be connected to a source of fluid pressure; and i. actuating means communicating with said actuating pressure port via said conditioning valve, and responsive to the presence of pressure at said actuating pressure port when said conditioning valve is open for opening said pilot valve; whereby when said conditioning valve is open, fluid pressure at said actuating pressure port causes said pilot valve to open and said chamber to be vented whereupon said valve member (b) moves away from said valve seat, but when said conditioning valve is closed, fluid pressure at said actuating pressure port is ineffective to open said pilot valve and said valve member (b) remains in engagement with said valve seat.
Claim 2
Dependent Claim
296 words
A valve comprising: a. a valve body having an inlet port, an outlet port, and an orifice between said ports surrounded by a valve seat; b. a main valve member movable into and out of engagement with said valve seat to close and open the valve, respectively; c. a chamber on the side of said valve member opposite said valve seat, said chamber communicating with said inlet port, whereby inlet pressure is applied to said opposite side of said valve member to keep the valve closed; d. a vent opening in said body; e. a pilot valve carried by said body establishing communication between said chamber and said vent opening, whereby when said pilot valve is opened the pressure in said chamber is reduced and the valve is permitted to open; f. a conditioning valve carried by said body and having an open and a closed position; g. a set port and a trip port in said body for alternatively receiving pressurized fluid to open and close said conditioning valve, respectively; h. an actuating pressure port in said body adapted to be connected to a source of fluid pressure; and i. actuating means communicating with said actuating pressure port via said conditioning valve, and responsive to the presence of pressure at said actuating pressure port when said conditioning valve is open for opening said pilot valve; whereby when said conditioning valve is open, fluid pressure at said actuating pressure port causes said pilot valve to open and said chamber to be vented whereupon said valve member (b) moves away from said valve seat, but when said conditioning valve is closed, fluid pressure at said actuating pressure port is ineffective to open said pilot valve and said valve member (b) remains in engagement with said valve seat.
Claim 3
Dependent Claim
85 words
A valve as defined in claim 1 wherein said conditioning valve (f) includes an orifice through which said actuating pressure port (h) communicates with said actuating means (i), a valve member movable toward and away from said conditioning valve orifice to close and open the latter, respectively, a spring urging said conditioning valve member toward its closed position, and means for holding said conditioning valve member in its open position against the force of said spring following application of fluid pressure to said set port.
Claim 4
Dependent Claim
67 words
A valve as defined in claim 2 wherein said last-named means includes detents carried by said valve body and said conditioning valve member, at least one of said detents being resiliently biased toward the other, said detents becoming engaged following application of fluid pressure to said set port, and said detents becoming disengaged and said conditioning valve closing following application of fluid pressure to said trip port.
Claim 5
Dependent Claim
35 words
A valve as defined in claim 2 including a diaphragm fixed to said conditioning valve member, said set port communicating with one face of said diaphragm and said trip port communicating with the opposite face.
Claim 6
Dependent Claim
74 words
A valve as defined in claim 1 wherein said pilot valve comprises an orifice, and a valve member movable toward and away from said orifice, and including a spring urging said pilot valve member toward said pilot orifice to close the latter, and a stem engaging said pilot valve member and extending through said pilot orifice, said stem transmitting movement of said actuating means to said pilot valve member for opening said pilot orifice.
Claim 7
Dependent Claim
76 words
A valve as defined in claim 5 wherein said actuating means includes a diaphragm, and a spring urging said diaphragm in a direction which permits said pilot valve member to close said pilot orifice, said diaphragm responding to fluid pressure from said actuating pressure port for moving said pilot valve member via said stem away from said pilot orifice against the force of said springs acting on said pilot valve member and said actuating means diaphragm.
Claim 8
Dependent Claim
30 words
A valve as defined iN claim 1 including a diaphragm supporting said valve member (b), a hole in said diaphragm establishing communication between said chamber (c) and said inlet port.
Claim 9
Dependent Claim
39 words
A series of valves as defined in claim 1, the outlet port of each valve communicating with the trip port of that valve and with the set port of the next succeeding valve, whereby said valves operate in sequence.
Claim 10
Dependent Claim
45 words
A series of valves as defined in claim 8 wherein the inlet ports of all said valves are connected to a single source of main line pressure, and the actuating pressure ports of all said valves are connected to a single source of actuating pressure.
References Cited (Backward Citations)
US2840104A
Cited
US2918072A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-15 | 1974-09-14 | 1975-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-15 | 1978-09-14 | 1979-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-15 | 1982-09-14 | 1983-03-16 | $7700.00 | Window Closed / Lapsed |