US3765444A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control system for opening and closing a butterfly valve
Assignee: Individual
•
Filing: 1972-07-06
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Granted: 1973-10-16
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Expires: 1992-07-06
Abstract
Abstract A control system for opening and closing a butterfly valve rotatably mounted in a fluid channel is provided. The piston of a servo-motor is operatively connected to the butterfly valve through a weight member and will close the butterfly valve at either a rapid or a slow speed in accordance with the rate of flow of the fluid detected within the channel. The rapid or slow rate of closure is obtained by coupling a main pipe line and a manifold pipe line to a fluid contained tank and to the cylinder of the servo-motor. The main pipe line and the manifold pipe line are separately operative in accordance with valves attached thereto and the rate of closure control is provided by having the cross-sectional area of the main pipe line larger than that of the manifold pipe line so that a different rate of exhaustion of the fluid within the servo-motor will occur depending which line is utilized.
Inventors
- 👤 Y Kosugi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:15
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/16; F16K1/18; F16K1/22; F16K1/221; F16K17/00; F16K17/36; F16K17/363; Y; Y02; Y02E; Y02E10/00; Y02E10/20; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7758; Y10T137/7759
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
77 words
A control system for opening and closing a valve in a fluid channel comprising: a valve rotatably mounted in a fluid channel; means for detecting the rate of flow within said fluid channel; and, means responsive to said detected rate of flow for slowly closing said valve if the rate of fluid flow is more than a predetermined value and for rapidly closing said valve if the rate of fluid flow is less than said predetermined value.
Claim 2
Dependent Claim
77 words
A control system for opening and closing a valve in a fluid channel comprising: a valve rotatably mounted in a fluid channel; means for detecting the rate of flow within said fluid channel; and, means responsive to said detected rate of flow for slowly closing said valve if the rate of fluid flow is more than a predetermined value and for rapidly closing said valve if the rate of fluid flow is less than said predetermined value.
Claim 3
Dependent Claim
15 words
A control system as in claim 1 wherein said valve is of the butterfly type.
Claim 4
Dependent Claim
154 words
A control system as in claim 1 wherein said means responsive to said detected rate of flow includes: a servo-motor for opening and closing said valve as a pressurized fluid is fed to or drained from the cylinder thereof; a first pipe line having a given cross-sectional area; a second pipe line having a given cross sectional area smaller than that of said first pipe line; a first valve for controlling fluid flow from said servo-motor through said first pipe line to a tank; a second valve for controlling fluid flow from said servo-motor through said second pipe line to said tank; and wherein said first valve will become operative to rapidly allow said rotatably mounted valve to close upon the detection of a given rate of flow and wherein said second valve will become operative to slowly allow said rotatably mounted valve to close upon the detection of a different rate of flow.
Claim 5
Dependent Claim
17 words
A control system as in claim 3 wherein said first valve is of the pressure distributing type.
Claim 6
Dependent Claim
30 words
A control system as in claim 4 wherein said first valve includes a pair of lands which are both connected to a moveable rod for enabling the simultaneous movement thereof.
Claim 7
Dependent Claim
17 words
A control system as in claim 3 wherein said second valve is of the electromagnetic solenoid type.
Claim 8
Dependent Claim
215 words
A control system for openIng and closing of butterfly valve comprising: a butterfly valve rotatably mounted in a fluid channel and for opening and closing the same; a servo-motor for opening and closing said butterfly valve as a pressurized fluid is fed to or drained from the cylinder thereof; a main pipe line having a large cross sectional area and leading said fluid from said cylinder of said servo-motor to a tank through a first valve; a manifold pipe line having a small cross sectional area and branching from said main pipe and led to said tank through a second valve; and a fluid-flow speed detector located upstream from said butterfly valve; whereby, if the speed of fluid flow detected by said fluid-flow speed detector is more than a predetermined value, a signal from said detector will open only said second valve to cause an exhaustion of fluid in said cylinder of said servo-motor to be effected through said manifold pipe line to thereby slowly close said butterfly valve; and if the speed of fluid flow is less than said predetermined value, only said first valve will open to cause an exhaustion of fluid in said cylinder of said servo-motor to be effected through the main pipe line to thereby rapidly close said butterfly valve.
Claim 9
Dependent Claim
215 words
A control system for openIng and closing of butterfly valve comprising: a butterfly valve rotatably mounted in a fluid channel and for opening and closing the same; a servo-motor for opening and closing said butterfly valve as a pressurized fluid is fed to or drained from the cylinder thereof; a main pipe line having a large cross sectional area and leading said fluid from said cylinder of said servo-motor to a tank through a first valve; a manifold pipe line having a small cross sectional area and branching from said main pipe and led to said tank through a second valve; and a fluid-flow speed detector located upstream from said butterfly valve; whereby, if the speed of fluid flow detected by said fluid-flow speed detector is more than a predetermined value, a signal from said detector will open only said second valve to cause an exhaustion of fluid in said cylinder of said servo-motor to be effected through said manifold pipe line to thereby slowly close said butterfly valve; and if the speed of fluid flow is less than said predetermined value, only said first valve will open to cause an exhaustion of fluid in said cylinder of said servo-motor to be effected through the main pipe line to thereby rapidly close said butterfly valve.
Claim 10
Dependent Claim
81 words
A control system as in claim 7 wherein said fluid-flow speed detector includes: a pressure-electric converter for detecting the pressure of the fluid flowing within said fluid channel and for converting the same into a corresponding electrical signal, and a Schmitt trigger circuit connected to said pressure-electric converter for providing one output value if said detector fluid speed is more than said predetermined value and for providing a second value if said detected fluid speed is less than said predetermined value.
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) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |