US3633603A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control systems
Assignee: Honeywell Normalair Garrett Ltd
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Filing: 1969-11-25
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Granted: 1972-01-11
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Expires: 1989-11-25
Abstract
Abstract A fluidic controlled pressure reducing valve where fluid amplifiers are utilized to sense pressure variations within a chamber, and present an amplified output signal to control the operation of the valve, the circuit also including an override device which enables the valve to be maintained in the fully open or closed position, irrespective of the fluid amplifier control signals.
Inventors
- 👤 Owen Desmond Arthur Ch Furlong
- 👤 Michael Arthur Bennett Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:29
CPC Classifications
F; F15; F15C; F15C1/00; F15C1/006; Y; Y10; Y10T; Y10T137/00; Y10T137/206; Y10T137/2065; Y10T137/2071; Y10T137/2087; Y10T137/2098; Y10T137/212; Y10T137/2125; Y10T137/2147; Y10T137/218; Y10T137/2202; Y10T137/2213
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
151 words
A fluid operated pressure control system for regulating pressure within an enclosure, comprising an enclosure, a variably settable device for varying pressure in the enclosure in accordance with its setting, a control system located outside the enclosure but responsive to pressure conditions in said enclosure for variably setting said device to maintain pressure in the enclosure at a desired value, said control system comprising at least one fluid amplifier having a principal fluid stream controlled by interaction with at least one control fluid stream such that the output of the amplifier is determined by the control fluid stream, mans for feeding the principal and control fluid streams, and means for sensing pressure variations in said enclosure and appropriately varying said control stream to, in turn, vary the output of said amplifier and effect a change of setting of said device to restore the pressure in the enclosure to said desired value.
Claim 2
Dependent Claim
151 words
A fluid operated pressure control system for regulating pressure within an enclosure, comprising an enclosure, a variably settable device for varying pressure in the enclosure in accordance with its setting, a control system located outside the enclosure but responsive to pressure conditions in said enclosure for variably setting said device to maintain pressure in the enclosure at a desired value, said control system comprising at least one fluid amplifier having a principal fluid stream controlled by interaction with at least one control fluid stream such that the output of the amplifier is determined by the control fluid stream, mans for feeding the principal and control fluid streams, and means for sensing pressure variations in said enclosure and appropriately varying said control stream to, in turn, vary the output of said amplifier and effect a change of setting of said device to restore the pressure in the enclosure to said desired value.
Claim 3
Dependent Claim
39 words
Apparatus as claimed in claim 1 wherein said sensing means comprises conduit means fluidly communicating said enclosure and said control stream whereby the effect of the control stream on the principal stream varies with pressure variations in said enclosure.
Claim 4
Dependent Claim
41 words
Apparatus as claImed in claim 2 wherein said variably settable device is a pressure-reducing valve operably positioned in a fluid duct connected to a pressure fluid source and said enclosure comprises a portion of said duct downstream from said pressure-reducing valve.
Claim 5
Dependent Claim
30 words
Apparatus as claimed in claim 3 wherein said amplifier is enclosed in a chamber remote from said enclosure and vented to ambient through a variable resistor to pressurize amplifier vents.
Claim 6
Dependent Claim
25 words
Apparatus as claimed in claim 1 further comprising selectively actuatable override controls for setting said device in positions for establishing either maximum or minimum pressures.
Claim 7
Dependent Claim
18 words
Apparatus as claimed in claim 5 wherein said override controls comprise solenoid-operated valves connected in said control system.
Claim 8
Dependent Claim
28 words
Apparatus as claimed in claim 3 wherein said means for feeding the principal and control fluid streams comprise fluid passage means communicating the fluid duct with said amplifier.
Claim 9
Dependent Claim
49 words
Apparatus as claimed in claim 7 wherein said fluid passage means for said principal stream is connected with said duct on both sides of said pressure-reducing valve through nonreturn valves, and wherein a pressure regulator is incorporated in said fluid passage means between said nonreturn valves and said amplifier.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-10 | 1975-07-12 | 1976-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-10 | 1979-07-12 | 1980-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-10 | 1983-07-12 | 1984-01-11 | $7700.00 | Window Closed / Lapsed |